mirror of https://github.com/sheumann/hush.git
1845 lines
68 KiB
C
1845 lines
68 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Busybox main internal header file
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*
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* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
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* Permission has been granted to redistribute this code under GPL.
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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#ifndef LIBBB_H
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#define LIBBB_H 1
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#include "platform.h"
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#include <ctype.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <setjmp.h>
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#include <signal.h>
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#if defined __UCLIBC__ /* TODO: and glibc? */
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/* use inlined versions of these: */
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# define sigfillset(s) __sigfillset(s)
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# define sigemptyset(s) __sigemptyset(s)
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# define sigisemptyset(s) __sigisemptyset(s)
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#endif
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#ifdef __GNO__
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/* Redefine these because GNO 2.0.6 definitions only support signals up to 16 */
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# undef sigaddset
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# undef sigdelset
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# undef sigismember
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# define sigaddset(set, signo) (*(set) |= (sigset_t)1 << ((signo) - 1), 0)
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# define sigdelset(set, signo) (*(set) &= ~((sigset_t)1 << ((signo) - 1)), 0)
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# define sigismember(set, signo) ((*(set) & ((sigset_t)1 << ((signo) - 1))) != 0)
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <string.h>
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/* There are two incompatible basename's, let's not use them! */
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/* See the dirname/basename man page for details */
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#undef basename
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#define basename dont_use_basename
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#include "poll.h"
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/* Don't include termios.h in GNO because termios isn't actually implemented,
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* but the header has a define for ECHO that conflicts with the one needed for
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* the ioctls that we use instead. Do define USE_OLD_TTY before including
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* <sys/ioctl.h>, which is needed to get defines for those ioctls.
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*/
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#ifndef __GNO__
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# include <termios.h>
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#else
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# define USE_OLD_TTY
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#endif
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#ifndef major
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# include <sys/sysmacros.h>
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#endif
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#include <sys/wait.h>
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#ifdef __GNO__
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/* Fix definition of WEXITSTATUS to support values with the high bit set. */
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# undef WEXITSTATUS
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# define WEXITSTATUS(x) (((*(int *)&(x)) >> 8) & 0xFF)
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#endif
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#include <time.h>
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#include <sys/param.h>
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#include <pwd.h>
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#include <grp.h>
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/* Include <gno/gno.h> for GNO job control calls. Define __KERN_STATUS to
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* avoid a couple definitions using ORCA/C's nonstandard inline directive.
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*/
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#ifdef __GNO__
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# define __USE_DYNAMIC_GSSTRING__
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# define __KERN_STATUS
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# include <gno/gno.h>
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#endif
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#if ENABLE_FEATURE_SHADOWPASSWDS
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# if !ENABLE_USE_BB_SHADOW
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/* If using busybox's shadow implementation, do not include the shadow.h
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* header as the toolchain may not provide it at all.
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*/
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# include <shadow.h>
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# endif
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#endif
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#if defined(ANDROID) || defined(__ANDROID__)
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# define endpwent() ((void)0)
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# define endgrent() ((void)0)
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#endif
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/* Don't do this here:
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* #include <sys/sysinfo.h>
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* Some linux/ includes pull in conflicting definition
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* of struct sysinfo (only in some toolchanins), which breaks build.
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* Include sys/sysinfo.h only in those files which need it.
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*/
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#if ENABLE_SELINUX
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# include <selinux/selinux.h>
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# include <selinux/context.h>
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# include <selinux/flask.h>
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# include <selinux/av_permissions.h>
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#endif
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#if ENABLE_FEATURE_UTMP
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# if defined __UCLIBC__ && ( \
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(UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 32) \
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&& UCLIBC_VERSION < KERNEL_VERSION(0, 9, 34) \
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&& defined __UCLIBC_HAS_UTMPX__ \
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) || ( \
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UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 34) \
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) \
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)
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# include <utmpx.h>
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# elif defined __UCLIBC__
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# include <utmp.h>
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# define utmpx utmp
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# define setutxent setutent
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# define endutxent endutent
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# define getutxent getutent
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# define getutxid getutid
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# define getutxline getutline
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# define pututxline pututline
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# define utmpxname utmpname
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# define updwtmpx updwtmp
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# define _PATH_UTMPX _PATH_UTMP
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# else
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# include <utmpx.h>
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# endif
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#endif
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#if ENABLE_LOCALE_SUPPORT
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# include <locale.h>
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#else
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# define setlocale(x,y) ((void)0)
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#endif
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#ifdef DMALLOC
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# include <dmalloc.h>
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#endif
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/* Just in case libc doesn't define some of these... */
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#ifndef _PATH_PASSWD
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#define _PATH_PASSWD "/etc/passwd"
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#endif
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#ifndef _PATH_GROUP
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#define _PATH_GROUP "/etc/group"
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#endif
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#ifndef _PATH_SHADOW
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#define _PATH_SHADOW "/etc/shadow"
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#endif
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#ifndef _PATH_GSHADOW
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#define _PATH_GSHADOW "/etc/gshadow"
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#endif
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#if defined __FreeBSD__ || defined __OpenBSD__
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# include <netinet/in.h>
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# include <arpa/inet.h>
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#elif defined __APPLE__
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# include <netinet/in.h>
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#else
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# include <arpa/inet.h>
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# if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED)
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/* We #define socklen_t *after* includes, otherwise we get
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* typedef redefinition errors from system headers
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* (in case "is it defined already" detection above failed)
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*/
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# define socklen_t bb_socklen_t
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typedef unsigned socklen_t;
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# endif
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#endif
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#ifndef HAVE_CLEARENV
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# define clearenv() do { if (environ) environ[0] = NULL; } while (0)
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#endif
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#ifndef HAVE_FDATASYNC
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# define fdatasync fsync
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#endif
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/* Some libc's forget to declare these, do it ourself */
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extern char **environ;
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#if defined(__GLIBC__) && __GLIBC__ < 2
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int vdprintf(int d, const char *format, va_list ap);
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#endif
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/* klogctl is in libc's klog.h, but we cheat and not #include that */
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int klogctl(int type, char *b, int len);
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#ifndef PATH_MAX
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# define PATH_MAX 256
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#endif
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#ifndef BUFSIZ
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# define BUFSIZ 4096
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#endif
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/* Busybox does not use threads, we can speed up stdio. */
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#ifdef HAVE_UNLOCKED_STDIO
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# undef getc
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# define getc(stream) getc_unlocked(stream)
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# undef getchar
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# define getchar() getchar_unlocked()
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# undef putc
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# define putc(c, stream) putc_unlocked(c, stream)
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# undef putchar
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# define putchar(c) putchar_unlocked(c)
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# undef fgetc
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# define fgetc(stream) getc_unlocked(stream)
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# undef fputc
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# define fputc(c, stream) putc_unlocked(c, stream)
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#endif
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/* Above functions are required by POSIX.1-2008, below ones are extensions */
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#ifdef HAVE_UNLOCKED_LINE_OPS
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# undef fgets
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# define fgets(s, n, stream) fgets_unlocked(s, n, stream)
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# undef fputs
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# define fputs(s, stream) fputs_unlocked(s, stream)
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#endif
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/* Make all declarations hidden (-fvisibility flag only affects definitions) */
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/* (don't include system headers after this until corresponding pop!) */
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PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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#if ENABLE_USE_BB_PWD_GRP
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# include "pwd_.h"
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# include "grp_.h"
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#endif
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#if ENABLE_FEATURE_SHADOWPASSWDS
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# if ENABLE_USE_BB_SHADOW
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# include "shadow_.h"
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# endif
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#endif
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/* Tested to work correctly with all int types (IIRC :]) */
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#define MAXINT(T) (T)( \
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((T)-1) > 0 \
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? (T)-1 \
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: (T)~((T)1 << (sizeof(T)*8-1)) \
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)
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#define MININT(T) (T)( \
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((T)-1) > 0 \
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? (T)0 \
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: ((T)1 << (sizeof(T)*8-1)) \
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)
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/* Large file support */
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/* Note that CONFIG_LFS=y forces bbox to be built with all common ops
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* (stat, lseek etc) mapped to "largefile" variants by libc.
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* Practically it means that open() automatically has O_LARGEFILE added
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* and all filesize/file_offset parameters and struct members are "large"
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* (in today's world - signed 64bit). For full support of large files,
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* we need a few helper #defines (below) and careful use of off_t
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* instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */
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#if ENABLE_LFS
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/* CONFIG_LFS is on */
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# if ULONG_MAX > 0xffffffff
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/* "long" is long enough on this system */
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typedef unsigned long uoff_t;
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# define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
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/* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */
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# define BB_STRTOOFF bb_strtoul
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# define STRTOOFF strtoul
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/* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */
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# define OFF_FMT "l"
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# else
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/* "long" is too short, need "long long" */
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typedef unsigned long long uoff_t;
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# define XATOOFF(a) xatoull_range((a), 0, LLONG_MAX)
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# define BB_STRTOOFF bb_strtoull
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# define STRTOOFF strtoull
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# define OFF_FMT "ll"
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# endif
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#else
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/* CONFIG_LFS is off */
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# if UINT_MAX == 0xffffffff
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/* While sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway.
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* gcc will throw warnings on printf("%d", off_t). Crap... */
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typedef unsigned long uoff_t;
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# define XATOOFF(a) xatoi_positive(a)
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# define BB_STRTOOFF bb_strtou
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# define STRTOOFF strtol
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# define OFF_FMT "l"
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# else
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typedef unsigned long uoff_t;
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# define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
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# define BB_STRTOOFF bb_strtoul
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# define STRTOOFF strtol
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# define OFF_FMT "l"
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# endif
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#endif
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/* scary. better ideas? (but do *test* them first!) */
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#define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1)))
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/* Users report bionic to use 32-bit off_t even if LARGEFILE support is requested.
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* We misdetected that. Don't let it build:
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*/
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struct BUG_off_t_size_is_misdetected {
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char BUG_off_t_size_is_misdetected[sizeof(off_t) == sizeof(uoff_t) ? 1 : -1];
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};
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/* Some useful definitions */
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#undef FALSE
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#define FALSE ((int) 0)
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#undef TRUE
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#define TRUE ((int) 1)
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#undef SKIP
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#define SKIP ((int) 2)
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/* Macros for min/max. */
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#ifndef MIN
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#define MIN(a,b) (((a)<(b))?(a):(b))
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#endif
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#ifndef MAX
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#define MAX(a,b) (((a)>(b))?(a):(b))
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#endif
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/* buffer allocation schemes */
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#if ENABLE_FEATURE_BUFFERS_GO_ON_STACK
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#define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len]
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#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len]
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#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
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#else
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#if ENABLE_FEATURE_BUFFERS_GO_IN_BSS
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#define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len]
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#define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len]
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#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
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#else
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#define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len)
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#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len)
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#define RELEASE_CONFIG_BUFFER(buffer) free(buffer)
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#endif
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#endif
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#if defined(__GLIBC__)
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/* glibc uses __errno_location() to get a ptr to errno */
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/* We can just memorize it once - no multithreading in busybox :) */
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extern int *const bb_errno;
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#undef errno
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#define errno (*bb_errno)
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#endif
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unsigned long monotonic_sec(void) FAST_FUNC;
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extern void chomp(char *s) FAST_FUNC;
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extern void trim(char *s) FAST_FUNC;
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extern char *skip_whitespace(const char *) FAST_FUNC;
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extern char *skip_non_whitespace(const char *) FAST_FUNC;
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extern char *skip_dev_pfx(const char *tty_name) FAST_FUNC;
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extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC;
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//TODO: supply a pointer to char[11] buffer (avoid statics)?
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extern const char *bb_mode_string(mode_t mode) FAST_FUNC;
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extern int is_directory(const char *name, int followLinks) FAST_FUNC;
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enum { /* DO NOT CHANGE THESE VALUES! cp.c, mv.c, install.c depend on them. */
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FILEUTILS_PRESERVE_STATUS = 1 << 0, /* -p */
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FILEUTILS_DEREFERENCE = 1 << 1, /* !-d */
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FILEUTILS_RECUR = 1 << 2, /* -R */
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FILEUTILS_FORCE = 1 << 3, /* -f */
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FILEUTILS_INTERACTIVE = 1 << 4, /* -i */
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FILEUTILS_MAKE_HARDLINK = 1 << 5, /* -l */
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FILEUTILS_MAKE_SOFTLINK = 1 << 6, /* -s */
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FILEUTILS_DEREF_SOFTLINK = 1 << 7, /* -L */
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FILEUTILS_DEREFERENCE_L0 = 1 << 8, /* -H */
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#if ENABLE_SELINUX
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FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 9, /* -c */
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FILEUTILS_SET_SECURITY_CONTEXT = 1 << 10,
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#endif
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FILEUTILS_IGNORE_CHMOD_ERR = 1 << 11
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};
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#define FILEUTILS_CP_OPTSTR "pdRfilsLH" IF_SELINUX("c")
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extern int remove_file(const char *path, int flags) FAST_FUNC;
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/* NB: without FILEUTILS_RECUR in flags, it will basically "cat"
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* the source, not copy (unless "source" is a directory).
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* This makes "cp /dev/null file" and "install /dev/null file" (!!!)
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* work coreutils-compatibly. */
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extern int copy_file(const char *source, const char *dest, int flags) FAST_FUNC;
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enum {
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ACTION_RECURSE = (1 << 0),
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ACTION_FOLLOWLINKS = (1 << 1),
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ACTION_FOLLOWLINKS_L0 = (1 << 2),
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ACTION_DEPTHFIRST = (1 << 3),
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/*ACTION_REVERSE = (1 << 4), - unused */
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ACTION_QUIET = (1 << 5),
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ACTION_DANGLING_OK = (1 << 6)
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};
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typedef uint8_t recurse_flags_t;
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extern int recursive_action(const char *fileName, unsigned flags,
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int FAST_FUNC (*fileAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
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int FAST_FUNC (*dirAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
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void* userData, unsigned depth) FAST_FUNC;
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extern int device_open(const char *device, int mode) FAST_FUNC;
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enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
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extern int xgetpty(char *line) FAST_FUNC;
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extern int get_console_fd_or_die(void) FAST_FUNC;
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extern void console_make_active(int fd, const int vt_num) FAST_FUNC;
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extern char *find_block_device(const char *path) FAST_FUNC;
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/* bb_copyfd_XX print read/write errors and return -1 if they occur */
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extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC;
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extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC;
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extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC;
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/* "short" copy can be detected by return value < size */
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|
/* this helper yells "short read!" if param is not -1 */
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extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC;
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extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC;
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char* strcpy_and_process_escape_sequences(char *dst, const char *src) FAST_FUNC;
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/* xxxx_strip version can modify its parameter:
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* "/" -> "/"
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* "abc" -> "abc"
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* "abc/def" -> "def"
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* "abc/def/" -> "def" !!
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*/
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char *bb_get_last_path_component_strip(char *path) FAST_FUNC;
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/* "abc/def/" -> "" and it never modifies 'path' */
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char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC;
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/* Simpler version: does not special case "/" string */
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const char *bb_basename(const char *name) FAST_FUNC;
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/* NB: can violate const-ness (similarly to strchr) */
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char *last_char_is(const char *s, int c) FAST_FUNC;
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const char* endofname(const char *name) FAST_FUNC;
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char *is_prefixed_with(const char *string, const char *key) FAST_FUNC;
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char *is_suffixed_with(const char *string, const char *key) FAST_FUNC;
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|
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int ndelay_on(int fd) FAST_FUNC;
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int ndelay_off(int fd) FAST_FUNC;
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void close_on_exec_on(int fd) FAST_FUNC;
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void xdup2(int, int) FAST_FUNC;
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void xmove_fd(int, int) FAST_FUNC;
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|
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#ifdef __GNO__
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|
struct cloexec_ent {
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|
pid_t pid;
|
|
uint32_t cloexec_mask;
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};
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|
|
struct cloexec_ent *get_cloexec_ent(pid_t pid);
|
|
int new_cloexec_ent(uint32_t initial_mask);
|
|
void close_cloexec_fds(void);
|
|
void close_on_exec_on(int fd);
|
|
void close_on_exec_off(int fd);
|
|
int close_wrapper(int fd);
|
|
int fclose_wrapper(FILE *stream);
|
|
int dup2_wrapper(int fd, int fd2);
|
|
# define close(fd) close_wrapper(fd)
|
|
# define fclose(stream) fclose_wrapper(stream)
|
|
# define dup2(fd, fd2) dup2_wrapper(fd, fd2)
|
|
#endif
|
|
|
|
DIR *xopendir(const char *path) FAST_FUNC;
|
|
DIR *warn_opendir(const char *path) FAST_FUNC;
|
|
|
|
char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC;
|
|
char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC;
|
|
char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC;
|
|
/* !RETURNS_MALLOC: it's a realloc-like function */
|
|
char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC;
|
|
|
|
char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC;
|
|
|
|
|
|
void bb_signals(long int sigs, sig_t f) FAST_FUNC;
|
|
/* syscalls like read() will be interrupted with EINTR: */
|
|
void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
|
|
/* syscalls like read() won't be interrupted (though select/poll will be): */
|
|
void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
|
|
void wait_for_any_sig(void) FAST_FUNC;
|
|
void kill_myself_with_sig(int sig) NORETURN FAST_FUNC;
|
|
void sig_block(int sig) FAST_FUNC;
|
|
void sig_unblock(int sig) FAST_FUNC;
|
|
/* Will do sigaction(signum, act, NULL): */
|
|
int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC;
|
|
/* SIG_BLOCK/SIG_UNBLOCK all signals: */
|
|
int sigprocmask_allsigs(int how) FAST_FUNC;
|
|
/* Standard handler which just records signo */
|
|
extern smallint bb_got_signal;
|
|
void record_signo(int signo); /* not FAST_FUNC! */
|
|
|
|
|
|
void xsetgid(gid_t gid) FAST_FUNC;
|
|
void xsetuid(uid_t uid) FAST_FUNC;
|
|
void xsetegid(gid_t egid) FAST_FUNC;
|
|
void xseteuid(uid_t euid) FAST_FUNC;
|
|
void xchdir(const char *path) FAST_FUNC;
|
|
void xchroot(const char *path) FAST_FUNC;
|
|
void xsetenv(const char *key, const char *value) FAST_FUNC;
|
|
void bb_unsetenv(const char *key) FAST_FUNC;
|
|
void bb_unsetenv_and_free(char *key) FAST_FUNC;
|
|
void xunlink(const char *pathname) FAST_FUNC;
|
|
void xstat(const char *pathname, struct stat *buf) FAST_FUNC;
|
|
void xfstat(int fd, struct stat *buf, const char *errmsg) FAST_FUNC;
|
|
int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC;
|
|
int open_or_warn(const char *pathname, int flags) FAST_FUNC;
|
|
int xopen3(const char *pathname, int flags, int mode) FAST_FUNC;
|
|
int xopen(const char *pathname, int flags) FAST_FUNC;
|
|
int xopen_nonblocking(const char *pathname) FAST_FUNC;
|
|
int xopen_as_uid_gid(const char *pathname, int flags, uid_t u, gid_t g) FAST_FUNC;
|
|
int open_or_warn_stdin(const char *pathname) FAST_FUNC;
|
|
int xopen_stdin(const char *pathname) FAST_FUNC;
|
|
void xrename(const char *oldpath, const char *newpath) FAST_FUNC;
|
|
int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC;
|
|
off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC;
|
|
int xmkstemp(char *template) FAST_FUNC;
|
|
off_t fdlength(int fd) FAST_FUNC;
|
|
|
|
int tc_set_to_my_pgrp(int fd);
|
|
|
|
#ifdef __GNO__
|
|
void unsetenv_wrapper(const char *var);
|
|
int putenv_wrapper(char *string);
|
|
# define unsetenv unsetenv_wrapper
|
|
# define putenv putenv_wrapper
|
|
#endif
|
|
|
|
uoff_t FAST_FUNC get_volume_size_in_bytes(int fd,
|
|
const char *override,
|
|
unsigned override_units,
|
|
int extend);
|
|
|
|
void xpipe(int filedes[2]) FAST_FUNC;
|
|
/* In this form code with pipes is much more readable */
|
|
struct fd_pair { int rd; int wr; };
|
|
#define piped_pair(pair) pipe(&((pair).rd))
|
|
#define xpiped_pair(pair) xpipe(&((pair).rd))
|
|
|
|
|
|
void parse_datestr(const char *date_str, struct tm *ptm) FAST_FUNC;
|
|
time_t validate_tm_time(const char *date_str, struct tm *ptm) FAST_FUNC;
|
|
char *strftime_HHMMSS(char *buf, unsigned len, time_t *tp) FAST_FUNC;
|
|
char *strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp) FAST_FUNC;
|
|
|
|
int xsocket(int domain, int type, int protocol) FAST_FUNC;
|
|
void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC;
|
|
void xlisten(int s, int backlog) FAST_FUNC;
|
|
void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC;
|
|
ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
|
|
socklen_t tolen) FAST_FUNC;
|
|
|
|
int setsockopt_int(int fd, int level, int optname, int optval) FAST_FUNC;
|
|
int setsockopt_1(int fd, int level, int optname) FAST_FUNC;
|
|
int setsockopt_SOL_SOCKET_int(int fd, int optname, int optval) FAST_FUNC;
|
|
int setsockopt_SOL_SOCKET_1(int fd, int optname) FAST_FUNC;
|
|
/* SO_REUSEADDR allows a server to rebind to an address that is already
|
|
* "in use" by old connections to e.g. previous server instance which is
|
|
* killed or crashed. Without it bind will fail until all such connections
|
|
* time out. Linux does not allow multiple live binds on same ip:port
|
|
* regardless of SO_REUSEADDR (unlike some other flavors of Unix).
|
|
* Turn it on before you call bind(). */
|
|
void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
|
|
int setsockopt_keepalive(int fd) FAST_FUNC;
|
|
int setsockopt_broadcast(int fd) FAST_FUNC;
|
|
int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
|
|
/* NB: returns port in host byte order */
|
|
unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC;
|
|
typedef struct len_and_sockaddr {
|
|
socklen_t len;
|
|
union {
|
|
struct sockaddr sa;
|
|
struct sockaddr_in sin;
|
|
#if ENABLE_FEATURE_IPV6
|
|
struct sockaddr_in6 sin6;
|
|
#endif
|
|
} u;
|
|
} len_and_sockaddr;
|
|
|
|
/* Create stream socket, and allocate suitable lsa.
|
|
* (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6))
|
|
* af == AF_UNSPEC will result in trying to create IPv6 socket,
|
|
* and if kernel doesn't support it, fall back to IPv4.
|
|
* This is useful if you plan to bind to resulting local lsa.
|
|
*/
|
|
int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC;
|
|
int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC;
|
|
/* Create server socket bound to bindaddr:port. bindaddr can be NULL,
|
|
* numeric IP ("N.N.N.N") or numeric IPv6 address,
|
|
* and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
|
|
* Only if there is no suffix, port argument is used */
|
|
/* NB: these set SO_REUSEADDR before bind */
|
|
int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC;
|
|
int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC;
|
|
/* Create client TCP socket connected to peer:port. Peer cannot be NULL.
|
|
* Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname,
|
|
* and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
|
|
* If there is no suffix, port argument is used */
|
|
int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC;
|
|
/* Connect to peer identified by lsa */
|
|
int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC;
|
|
/* Get local address of bound or accepted socket */
|
|
len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
|
|
/* Get remote address of connected or accepted socket */
|
|
len_and_sockaddr *get_peer_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
|
|
/* Return malloc'ed len_and_sockaddr with socket address of host:port
|
|
* Currently will return IPv4 or IPv6 sockaddrs only
|
|
* (depending on host), but in theory nothing prevents e.g.
|
|
* UNIX socket address being returned, IPX sockaddr etc...
|
|
* On error does bb_error_msg and returns NULL */
|
|
len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
|
|
/* Version which dies on error */
|
|
len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
|
|
len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
|
|
/* Same, useful if you want to force family (e.g. IPv6) */
|
|
#if !ENABLE_FEATURE_IPV6
|
|
#define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port))
|
|
#define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port))
|
|
#else
|
|
len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
|
|
len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
|
|
#endif
|
|
/* Assign sin[6]_port member if the socket is an AF_INET[6] one,
|
|
* otherwise no-op. Useful for ftp.
|
|
* NB: does NOT do htons() internally, just direct assignment. */
|
|
void set_nport(struct sockaddr *sa, unsigned port) FAST_FUNC;
|
|
/* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
|
|
int get_nport(const struct sockaddr *sa) FAST_FUNC;
|
|
/* Reverse DNS. Returns NULL on failure. */
|
|
char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
/* This one doesn't append :PORTNUM */
|
|
char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
/* This one also doesn't fall back to dotted IP (returns NULL) */
|
|
char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
/* inet_[ap]ton on steroids */
|
|
char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
// "old" (ipv4 only) API
|
|
// users: traceroute.c hostname.c - use _list_ of all IPs
|
|
struct hostent *xgethostbyname(const char *name) FAST_FUNC;
|
|
// Also mount.c and inetd.c are using gethostbyname(),
|
|
// + inet_common.c has additional IPv4-only stuff
|
|
|
|
|
|
void socket_want_pktinfo(int fd) FAST_FUNC;
|
|
ssize_t send_to_from(int fd, void *buf, size_t len, int flags,
|
|
const struct sockaddr *to,
|
|
const struct sockaddr *from,
|
|
socklen_t tolen) FAST_FUNC;
|
|
ssize_t recv_from_to(int fd, void *buf, size_t len, int flags,
|
|
struct sockaddr *from,
|
|
struct sockaddr *to,
|
|
socklen_t sa_size) FAST_FUNC;
|
|
|
|
uint16_t inet_cksum(uint16_t *addr, int len) FAST_FUNC;
|
|
|
|
char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC;
|
|
char *xstrndup(const char *s, int n) FAST_FUNC RETURNS_MALLOC;
|
|
void *xmemdup(const void *s, int n) FAST_FUNC RETURNS_MALLOC;
|
|
void overlapping_strcpy(char *dst, const char *src) FAST_FUNC;
|
|
char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC;
|
|
char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC;
|
|
unsigned count_strstr(const char *str, const char *sub) FAST_FUNC;
|
|
char *xmalloc_substitute_string(const char *src, int count, const char *sub, const char *repl) FAST_FUNC;
|
|
/* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc.
|
|
* But potentially slow, don't use in one-billion-times loops */
|
|
int bb_putchar(int ch) FAST_FUNC;
|
|
void bb_putchar_binary(int ch) FAST_FUNC;
|
|
/* Note: does not use stdio, writes to fd 2 directly */
|
|
int bb_putchar_stderr(char ch) FAST_FUNC;
|
|
char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC;
|
|
char *auto_string(char *str) FAST_FUNC;
|
|
// gcc-4.1.1 still isn't good enough at optimizing it
|
|
// (+200 bytes compared to macro)
|
|
//static ALWAYS_INLINE
|
|
//int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; }
|
|
//static ALWAYS_INLINE
|
|
//int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; }
|
|
#define LONE_DASH(s) ((s)[0] == '-' && !(s)[1])
|
|
#define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
|
|
#define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
|
|
#define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1])
|
|
#define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
|
|
|
|
typedef struct uni_stat_t {
|
|
unsigned byte_count;
|
|
unsigned unicode_count;
|
|
unsigned unicode_width;
|
|
} uni_stat_t;
|
|
/* Returns a string with unprintable chars replaced by '?' or
|
|
* SUBST_WCHAR. This function is unicode-aware. */
|
|
const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str);
|
|
/* Prints unprintable char ch as ^C or M-c to file
|
|
* (M-c is used only if ch is ORed with PRINTABLE_META),
|
|
* else it is printed as-is (except for ch = 0x9b) */
|
|
enum { PRINTABLE_META = 0x100 };
|
|
void fputc_printable(int ch, FILE *file) FAST_FUNC;
|
|
/* Return a string that is the printable representation of character ch.
|
|
* Buffer must hold at least four characters. */
|
|
enum {
|
|
VISIBLE_ENDLINE = 1 << 0,
|
|
VISIBLE_SHOW_TABS = 1 << 1
|
|
};
|
|
void visible(unsigned ch, char *buf, int flags) FAST_FUNC;
|
|
|
|
/* dmalloc will redefine these to it's own implementation. It is safe
|
|
* to have the prototypes here unconditionally. */
|
|
void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC;
|
|
void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
|
|
void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
|
|
void *xrealloc(void *old, size_t size) FAST_FUNC;
|
|
/* After v = xrealloc_vector(v, SHIFT, idx) it's ok to use
|
|
* at least v[idx] and v[idx+1], for all idx values.
|
|
* SHIFT specifies how many new elements are added (1:2, 2:4, ..., 8:256...)
|
|
* when all elements are used up. New elements are zeroed out.
|
|
* xrealloc_vector(v, SHIFT, idx) *MUST* be called with consecutive IDXs -
|
|
* skipping an index is a bad bug - it may miss a realloc!
|
|
*/
|
|
#define xrealloc_vector(vector, shift, idx) \
|
|
xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx))
|
|
void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC;
|
|
|
|
|
|
extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC;
|
|
extern ssize_t nonblock_immune_read(int fd, void *buf, size_t count) FAST_FUNC;
|
|
// NB: will return short read on error, not -1,
|
|
// if some data was read before error occurred
|
|
extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC;
|
|
extern void xread(int fd, void *buf, size_t count) FAST_FUNC;
|
|
extern unsigned char xread_char(int fd) FAST_FUNC;
|
|
extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
|
|
extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
|
|
// Reads one line a-la fgets (but doesn't save terminating '\n').
|
|
// Reads byte-by-byte. Useful when it is important to not read ahead.
|
|
// Bytes are appended to pfx (which must be malloced, or NULL).
|
|
extern char *xmalloc_reads(int fd, size_t *maxsz_p) FAST_FUNC;
|
|
/* Reads block up to *maxsz_p (default: INT_MAX - 4095) */
|
|
extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
|
/* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
|
|
extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
|
/* Never returns NULL */
|
|
extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
|
|
|
#if defined(ARG_MAX) && (ARG_MAX >= 60*1024 || !defined(_SC_ARG_MAX))
|
|
/* Use _constant_ maximum if: defined && (big enough || no variable one exists) */
|
|
# define bb_arg_max() ((unsigned)ARG_MAX)
|
|
#elif defined(_SC_ARG_MAX)
|
|
/* Else use variable one (a bit more expensive) */
|
|
unsigned bb_arg_max(void) FAST_FUNC;
|
|
#else
|
|
/* If all else fails */
|
|
# define bb_arg_max() ((unsigned)(32 * 1024))
|
|
#endif
|
|
unsigned bb_clk_tck(void) FAST_FUNC;
|
|
|
|
#define SEAMLESS_COMPRESSION (0 \
|
|
|| ENABLE_FEATURE_SEAMLESS_XZ \
|
|
|| ENABLE_FEATURE_SEAMLESS_LZMA \
|
|
|| ENABLE_FEATURE_SEAMLESS_BZ2 \
|
|
|| ENABLE_FEATURE_SEAMLESS_GZ \
|
|
|| ENABLE_FEATURE_SEAMLESS_Z)
|
|
|
|
extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
|
|
// NB: will return short write on error, not -1,
|
|
// if some data was written before error occurred
|
|
extern ssize_t full_write(int fd, const void *buf, size_t count) FAST_FUNC;
|
|
extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC;
|
|
extern void xwrite_str(int fd, const char *str) FAST_FUNC;
|
|
extern ssize_t full_write1_str(const char *str) FAST_FUNC;
|
|
extern ssize_t full_write2_str(const char *str) FAST_FUNC;
|
|
extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC;
|
|
|
|
/* Close fd, but check for failures (some types of write errors) */
|
|
extern void xclose(int fd) FAST_FUNC;
|
|
|
|
/* Reads and prints to stdout till eof, then closes FILE. Exits on error: */
|
|
extern void xprint_and_close_file(FILE *file) FAST_FUNC;
|
|
|
|
/* Reads a line from a text file, up to a newline or NUL byte, inclusive.
|
|
* Returns malloc'ed char*. If end is NULL '\n' isn't considered
|
|
* end of line. If end isn't NULL, length of the chunk is stored in it.
|
|
* Returns NULL if EOF/error.
|
|
*/
|
|
extern char *bb_get_chunk_from_file(FILE *file, int *end) FAST_FUNC;
|
|
/* Reads up to (and including) TERMINATING_STRING: */
|
|
extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
|
|
/* Same, with limited max size, and returns the length (excluding NUL): */
|
|
extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
|
/* Chops off TERMINATING_STRING from the end: */
|
|
extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
|
|
/* Reads up to (and including) "\n" or NUL byte: */
|
|
extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC;
|
|
/* Chops off '\n' from the end, unlike fgets: */
|
|
extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC;
|
|
/* Same, but doesn't try to conserve space (may have some slack after the end) */
|
|
/* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */
|
|
|
|
void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
|
|
void die_if_ferror_stdout(void) FAST_FUNC;
|
|
int fflush_all(void) FAST_FUNC;
|
|
void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
|
|
int fclose_if_not_stdin(FILE *file) FAST_FUNC;
|
|
FILE* xfopen(const char *filename, const char *mode) FAST_FUNC;
|
|
/* Prints warning to stderr and returns NULL on failure: */
|
|
FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
|
|
/* "Opens" stdin if filename is special, else just opens file: */
|
|
FILE* xfopen_stdin(const char *filename) FAST_FUNC;
|
|
FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC;
|
|
FILE* fopen_for_read(const char *path) FAST_FUNC;
|
|
FILE* xfopen_for_read(const char *path) FAST_FUNC;
|
|
FILE* fopen_for_write(const char *path) FAST_FUNC;
|
|
FILE* xfopen_for_write(const char *path) FAST_FUNC;
|
|
FILE* xfdopen_for_read(int fd) FAST_FUNC;
|
|
FILE* xfdopen_for_write(int fd) FAST_FUNC;
|
|
|
|
int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */;
|
|
void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
|
|
|
|
/* Wrapper which restarts poll on EINTR or ENOMEM.
|
|
* On other errors complains [perror("poll")] and returns.
|
|
* Warning! May take (much) longer than timeout_ms to return!
|
|
* If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */
|
|
int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC;
|
|
|
|
char *safe_gethostname(void) FAST_FUNC;
|
|
|
|
/* Convert each alpha char in str to lower-case */
|
|
char* str_tolower(char *str) FAST_FUNC;
|
|
|
|
char *utoa(unsigned n) FAST_FUNC;
|
|
char *itoa(int n) FAST_FUNC;
|
|
/* Returns a pointer past the formatted number, does NOT null-terminate */
|
|
char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC;
|
|
char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC;
|
|
/* If block_size == 0, display size without fractional part,
|
|
* else display (size * block_size) with one decimal digit.
|
|
* If display_unit == 0, show value no bigger than 1024 with suffix (K,M,G...),
|
|
* else divide by display_unit and do not use suffix. */
|
|
#define HUMAN_READABLE_MAX_WIDTH 7 /* "1024.0G" */
|
|
#define HUMAN_READABLE_MAX_WIDTH_STR "7"
|
|
/* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
|
|
char *bin2hex(char *dst, const char *src, int count) FAST_FUNC;
|
|
/* Reverse */
|
|
char* hex2bin(char *dst, const char *src, int count) FAST_FUNC;
|
|
|
|
/* Generate a UUID */
|
|
void generate_uuid(uint8_t *buf) FAST_FUNC;
|
|
|
|
/* Last element is marked by mult == 0 */
|
|
struct suffix_mult {
|
|
char suffix[4];
|
|
unsigned mult;
|
|
};
|
|
extern const struct suffix_mult bkm_suffixes[];
|
|
#define km_suffixes (bkm_suffixes + 1)
|
|
extern const struct suffix_mult cwbkMG_suffixes[];
|
|
#define kMG_suffixes (cwbkMG_suffixes + 3)
|
|
|
|
#include "xatonum.h"
|
|
/* Specialized: */
|
|
|
|
/* Using xatoi() instead of naive atoi() is not always convenient -
|
|
* in many places people want *non-negative* values, but store them
|
|
* in signed int. Therefore we need this one:
|
|
* dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc.
|
|
* It should really be named xatoi_nonnegative (since it allows 0),
|
|
* but that would be too long.
|
|
*/
|
|
int xatoi_positive(const char *numstr) FAST_FUNC;
|
|
|
|
/* Useful for reading port numbers */
|
|
uint16_t xatou16(const char *numstr) FAST_FUNC;
|
|
|
|
|
|
/* These parse entries in /etc/passwd and /etc/group. This is desirable
|
|
* for BusyBox since we want to avoid using the glibc NSS stuff, which
|
|
* increases target size and is often not needed on embedded systems. */
|
|
long xuname2uid(const char *name) FAST_FUNC;
|
|
long xgroup2gid(const char *name) FAST_FUNC;
|
|
/* wrapper: allows string to contain numeric uid or gid */
|
|
unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC;
|
|
/* from chpst. Does not die, returns 0 on failure */
|
|
struct bb_uidgid_t {
|
|
uid_t uid;
|
|
gid_t gid;
|
|
};
|
|
/* always sets uid and gid */
|
|
int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok) FAST_FUNC;
|
|
/* always sets uid and gid, allows numeric; exits on failure */
|
|
void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
|
|
/* chown-like handling of "user[:[group]" */
|
|
void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC;
|
|
struct passwd* xgetpwnam(const char *name) FAST_FUNC;
|
|
struct group* xgetgrnam(const char *name) FAST_FUNC;
|
|
struct passwd* xgetpwuid(uid_t uid) FAST_FUNC;
|
|
struct group* xgetgrgid(gid_t gid) FAST_FUNC;
|
|
char* xuid2uname(uid_t uid) FAST_FUNC;
|
|
char* xgid2group(gid_t gid) FAST_FUNC;
|
|
char* uid2uname(uid_t uid) FAST_FUNC;
|
|
char* gid2group(gid_t gid) FAST_FUNC;
|
|
char* uid2uname_utoa(uid_t uid) FAST_FUNC;
|
|
char* gid2group_utoa(gid_t gid) FAST_FUNC;
|
|
/* versions which cache results (useful for ps, ls etc) */
|
|
const char* get_cached_username(uid_t uid) FAST_FUNC;
|
|
const char* get_cached_groupname(gid_t gid) FAST_FUNC;
|
|
void clear_username_cache(void) FAST_FUNC;
|
|
/* internally usernames are saved in fixed-sized char[] buffers */
|
|
enum { USERNAME_MAX_SIZE = 32 - sizeof(uid_t) };
|
|
#if ENABLE_FEATURE_CHECK_NAMES
|
|
void die_if_bad_username(const char* name) FAST_FUNC;
|
|
#else
|
|
#define die_if_bad_username(name) ((void)(name))
|
|
#endif
|
|
|
|
int ingroup(uid_t u, gid_t g);
|
|
|
|
#if ENABLE_FEATURE_UTMP
|
|
void FAST_FUNC write_new_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
|
|
void FAST_FUNC update_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
|
|
void FAST_FUNC update_utmp_DEAD_PROCESS(pid_t pid);
|
|
#else
|
|
# define write_new_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
|
|
# define update_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
|
|
# define update_utmp_DEAD_PROCESS(pid) ((void)0)
|
|
#endif
|
|
|
|
|
|
int file_is_executable(const char *name) FAST_FUNC;
|
|
char *find_executable(const char *filename, char **PATHp) FAST_FUNC;
|
|
int executable_exists(const char *filename) FAST_FUNC;
|
|
|
|
/* xvfork() can't be a _function_, return after vfork mangles stack
|
|
* in the parent. It must be a macro. */
|
|
#define xvfork() \
|
|
({ \
|
|
pid_t bb__xvfork_pid = vfork(); \
|
|
if (bb__xvfork_pid < 0) \
|
|
bb_perror_msg_and_die("vfork"); \
|
|
bb__xvfork_pid; \
|
|
})
|
|
#if BB_MMU
|
|
pid_t xfork(void) FAST_FUNC;
|
|
#endif
|
|
|
|
/* NOMMU friendy fork+exec: */
|
|
pid_t spawn(char **argv) FAST_FUNC;
|
|
pid_t xspawn(char **argv) FAST_FUNC;
|
|
|
|
pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC;
|
|
/* wait4pid: unlike waitpid, waits ONLY for one process.
|
|
* Returns sig + 0x180 if child is killed by signal.
|
|
* It's safe to pass negative 'pids' from failed [v]fork -
|
|
* wait4pid will return -1 (and will not clobber [v]fork's errno).
|
|
* IOW: rc = wait4pid(spawn(argv));
|
|
* if (rc < 0) bb_perror_msg("%s", argv[0]);
|
|
* if (rc > 0) bb_error_msg("exit code: %d", rc & 0xff);
|
|
*/
|
|
int wait4pid(pid_t pid) FAST_FUNC;
|
|
/* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */
|
|
int spawn_and_wait(char **argv) FAST_FUNC;
|
|
/* Does NOT check that applet is NOFORK, just blindly runs it */
|
|
int run_nofork_applet(int applet_no, char **argv) FAST_FUNC;
|
|
|
|
/* Helpers for daemonization.
|
|
*
|
|
* bb_daemonize(flags) = daemonize, does not compile on NOMMU
|
|
*
|
|
* bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv),
|
|
* rexec's itself on NOMMU with argv passed as command line.
|
|
* Thus bb_daemonize_or_rexec may cause your <applet>_main() to be re-executed
|
|
* from the start. (It will detect it and not reexec again second time).
|
|
* You have to audit carefully that you don't do something twice as a result
|
|
* (opening files/sockets, parsing config files etc...)!
|
|
*
|
|
* Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty
|
|
* (will do setsid()).
|
|
*
|
|
* fork_or_rexec(argv) = bare-bones fork on MMU,
|
|
* "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid().
|
|
* On MMU ignores argv.
|
|
*
|
|
* Helper for network daemons in foreground mode:
|
|
*
|
|
* bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them
|
|
* to /dev/null if they are not.
|
|
*/
|
|
enum {
|
|
DAEMON_CHDIR_ROOT = 1,
|
|
DAEMON_DEVNULL_STDIO = 2,
|
|
DAEMON_CLOSE_EXTRA_FDS = 4,
|
|
DAEMON_ONLY_SANITIZE = 8, /* internal use */
|
|
DAEMON_DOUBLE_FORK = 16 /* double fork to avoid controlling tty */
|
|
};
|
|
#if BB_MMU
|
|
# define fork_or_rexec(argv) xfork()
|
|
# define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags)
|
|
# define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus)
|
|
#else
|
|
/* Note: re_exec() and fork_or_rexec() do argv[0][0] |= 0x80 on NOMMU!
|
|
* _Parent_ needs to undo it if it doesn't want to have argv[0] mangled.
|
|
*/
|
|
pid_t fork_or_rexec(char **argv) FAST_FUNC;
|
|
int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC;
|
|
int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC;
|
|
void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC;
|
|
# define fork() BUG_fork_is_unavailable_on_nommu()
|
|
# define xfork() BUG_fork_is_unavailable_on_nommu()
|
|
# define daemon(a,b) BUG_daemon_is_unavailable_on_nommu()
|
|
# define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu()
|
|
#endif
|
|
void bb_daemonize_or_rexec(int flags, char **argv) FAST_FUNC;
|
|
void bb_sanitize_stdio(void) FAST_FUNC;
|
|
/* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */
|
|
int sanitize_env_if_suid(void) FAST_FUNC;
|
|
|
|
|
|
pid_t vfork_and_run(void (*fn)(void*) NORETURN, void *arg);
|
|
pid_t xvfork_and_run(void (*fn)(void*) NORETURN, void *arg);
|
|
|
|
|
|
char* single_argv(char **argv) FAST_FUNC;
|
|
extern const char *const bb_argv_dash[]; /* "-", NULL */
|
|
extern const char *opt_complementary;
|
|
#if ENABLE_LONG_OPTS || ENABLE_FEATURE_GETOPT_LONG
|
|
#define No_argument "\0"
|
|
#define Required_argument "\001"
|
|
#define Optional_argument "\002"
|
|
extern const char *applet_long_options;
|
|
#endif
|
|
extern uint32_t option_mask32;
|
|
extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
|
|
|
|
|
|
/* Having next pointer as a first member allows easy creation
|
|
* of "llist-compatible" structs, and using llist_FOO functions
|
|
* on them.
|
|
*/
|
|
typedef struct llist_t {
|
|
struct llist_t *link;
|
|
char *data;
|
|
} llist_t;
|
|
void llist_add_to(llist_t **old_head, void *data) FAST_FUNC;
|
|
void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC;
|
|
void *llist_pop(llist_t **elm) FAST_FUNC;
|
|
void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC;
|
|
void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC;
|
|
llist_t *llist_rev(llist_t *list) FAST_FUNC;
|
|
llist_t *llist_find_str(llist_t *first, const char *str) FAST_FUNC;
|
|
/* BTW, surprisingly, changing API to
|
|
* llist_t *llist_add_to(llist_t *old_head, void *data)
|
|
* etc does not result in smaller code... */
|
|
|
|
enum {
|
|
LOGMODE_NONE = 0,
|
|
LOGMODE_STDIO = (1 << 0)
|
|
};
|
|
extern const char *msg_eol;
|
|
extern smallint logmode;
|
|
extern uint8_t xfunc_error_retval;
|
|
extern void (*die_func)(void);
|
|
extern void xfunc_die(void) NORETURN FAST_FUNC;
|
|
extern void bb_show_usage(void) NORETURN FAST_FUNC;
|
|
extern void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
|
|
extern void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
|
|
extern void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
|
|
extern void bb_simple_perror_msg(const char *s) FAST_FUNC;
|
|
extern void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
|
|
extern void bb_simple_perror_msg_and_die(const char *s) NORETURN FAST_FUNC;
|
|
extern void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
|
|
extern void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
|
|
extern void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC;
|
|
extern void bb_perror_nomsg(void) FAST_FUNC;
|
|
extern void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
|
|
extern void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC;
|
|
|
|
/* We need to export XXX_main from libbusybox
|
|
* only if we build "individual" binaries
|
|
*/
|
|
#if ENABLE_FEATURE_INDIVIDUAL
|
|
#define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE
|
|
#else
|
|
#define MAIN_EXTERNALLY_VISIBLE
|
|
#endif
|
|
|
|
|
|
/* Applets which are useful from another applets */
|
|
int bb_cat(char** argv);
|
|
/* If shell needs them, they exist even if not enabled as applets */
|
|
int echo_main(int argc, char** argv);
|
|
int printf_main(int argc, char **argv);
|
|
int test_main(int argc, char **argv);
|
|
int kill_main(int argc, char **argv);
|
|
/* Similar, but used by chgrp, not shell */
|
|
int chown_main(int argc, char **argv);
|
|
/* Used by ftpd */
|
|
int ls_main(int argc, char **argv);
|
|
/* Don't need IF_xxx() guard for these */
|
|
int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
|
|
#if ENABLE_ROUTE
|
|
void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
|
|
#endif
|
|
|
|
|
|
/* Networking */
|
|
/* This structure defines protocol families and their handlers. */
|
|
struct aftype {
|
|
const char *name;
|
|
const char *title;
|
|
int af;
|
|
int alen;
|
|
char* FAST_FUNC (*print)(unsigned char *);
|
|
const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric);
|
|
int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *);
|
|
void FAST_FUNC (*herror)(char *text);
|
|
int FAST_FUNC (*rprint)(int options);
|
|
int FAST_FUNC (*rinput)(int typ, int ext, char **argv);
|
|
/* may modify src */
|
|
int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name);
|
|
};
|
|
/* This structure defines hardware protocols and their handlers. */
|
|
struct hwtype {
|
|
const char *name;
|
|
const char *title;
|
|
int type;
|
|
int alen;
|
|
char* FAST_FUNC (*print)(unsigned char *);
|
|
int FAST_FUNC (*input)(const char *, struct sockaddr *);
|
|
int FAST_FUNC (*activate)(int fd);
|
|
int suppress_null_addr;
|
|
};
|
|
int display_interfaces(char *ifname) FAST_FUNC;
|
|
int in_ether(const char *bufp, struct sockaddr *sap) FAST_FUNC;
|
|
#if ENABLE_FEATURE_HWIB
|
|
int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC;
|
|
#else
|
|
#define in_ib(a, b) 1 /* fail */
|
|
#endif
|
|
const struct aftype *get_aftype(const char *name) FAST_FUNC;
|
|
const struct hwtype *get_hwtype(const char *name) FAST_FUNC;
|
|
const struct hwtype *get_hwntype(int type) FAST_FUNC;
|
|
|
|
|
|
#ifndef BUILD_INDIVIDUAL
|
|
extern int find_applet_by_name(const char *name) FAST_FUNC;
|
|
/* Returns only if applet is not found. */
|
|
extern void run_applet_and_exit(const char *name, char **argv) FAST_FUNC;
|
|
extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC;
|
|
#endif
|
|
|
|
#ifdef HAVE_MNTENT_H
|
|
extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC;
|
|
extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;
|
|
#endif
|
|
extern void erase_mtab(const char * name) FAST_FUNC;
|
|
#if ENABLE_DESKTOP
|
|
extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
|
|
#else
|
|
# define bb_warn_ignoring_args(arg) ((void)0)
|
|
#endif
|
|
|
|
extern int get_linux_version_code(void) FAST_FUNC;
|
|
|
|
extern char *query_loop(const char *device) FAST_FUNC;
|
|
extern int del_loop(const char *device) FAST_FUNC;
|
|
|
|
/* Like bb_ask below, but asks on stdin with no timeout. */
|
|
char *bb_ask_stdin(const char * prompt) FAST_FUNC;
|
|
//TODO: pass buf pointer or return allocated buf (avoid statics)?
|
|
char *bb_ask(const int fd, int timeout, const char * prompt) FAST_FUNC;
|
|
int bb_ask_confirmation(void) FAST_FUNC;
|
|
|
|
/* Returns -1 if input is invalid. current_mode is a base for e.g. "u+rw" */
|
|
int bb_parse_mode(const char* s, unsigned cur_mode) FAST_FUNC;
|
|
|
|
/*
|
|
* Config file parser
|
|
*/
|
|
typedef struct parser_t {
|
|
FILE *fp;
|
|
char *data;
|
|
char *line, *nline;
|
|
size_t line_alloc, nline_alloc;
|
|
int lineno;
|
|
} parser_t;
|
|
parser_t* config_open(const char *filename) FAST_FUNC;
|
|
parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC;
|
|
/* delims[0] is a comment char (use '\0' to disable), the rest are token delimiters */
|
|
int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC;
|
|
#define config_read(parser, tokens, max, min, str, flags) \
|
|
config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str)
|
|
void config_close(parser_t *parser) FAST_FUNC;
|
|
|
|
/* Concatenate path and filename to new allocated buffer.
|
|
* Add "/" only as needed (no duplicate "//" are produced).
|
|
* If path is NULL, it is assumed to be "/".
|
|
* filename should not be NULL. */
|
|
char *concat_path_file(const char *path, const char *filename) FAST_FUNC;
|
|
/* Returns NULL on . and .. */
|
|
char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC;
|
|
|
|
|
|
int bb_make_directory(char *path, long mode, int flags) FAST_FUNC;
|
|
|
|
int get_signum(const char *name) FAST_FUNC;
|
|
const char *get_signame(int number) FAST_FUNC;
|
|
void print_signames(void) FAST_FUNC;
|
|
|
|
char *bb_simplify_path(const char *path) FAST_FUNC;
|
|
/* Returns ptr to NUL */
|
|
char *bb_simplify_abs_path_inplace(char *path) FAST_FUNC;
|
|
|
|
#ifndef LOGIN_FAIL_DELAY
|
|
#define LOGIN_FAIL_DELAY 3
|
|
#endif
|
|
extern void bb_do_delay(int seconds) FAST_FUNC;
|
|
extern void change_identity(const struct passwd *pw) FAST_FUNC;
|
|
extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) NORETURN FAST_FUNC;
|
|
|
|
/* Returns $SHELL, getpwuid(getuid())->pw_shell, or DEFAULT_SHELL.
|
|
* Note that getpwuid result might need xstrdup'ing
|
|
* if there is a possibility of intervening getpwxxx() calls.
|
|
*/
|
|
const char *get_shell_name(void) FAST_FUNC;
|
|
|
|
#if ENABLE_SELINUX
|
|
extern void renew_current_security_context(void) FAST_FUNC;
|
|
extern void set_current_security_context(security_context_t sid) FAST_FUNC;
|
|
extern context_t set_security_context_component(security_context_t cur_context,
|
|
char *user, char *role, char *type, char *range) FAST_FUNC;
|
|
extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC;
|
|
extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC;
|
|
#else
|
|
#define selinux_preserve_fcontext(fdesc) ((void)0)
|
|
#endif
|
|
extern void selinux_or_die(void) FAST_FUNC;
|
|
|
|
|
|
/* systemd support */
|
|
#define SD_LISTEN_FDS_START 3
|
|
int sd_listen_fds(void);
|
|
|
|
|
|
/* setup_environment:
|
|
* if chdir pw->pw_dir: ok: else if to_tmp == 1: goto /tmp else: goto / or die
|
|
* if clear_env = 1: cd(pw->pw_dir), clear environment, then set
|
|
* TERM=(old value)
|
|
* USER=pw->pw_name, LOGNAME=pw->pw_name
|
|
* PATH=bb_default_[root_]path
|
|
* HOME=pw->pw_dir
|
|
* SHELL=shell
|
|
* else if change_env = 1:
|
|
* if not root (if pw->pw_uid != 0):
|
|
* USER=pw->pw_name, LOGNAME=pw->pw_name
|
|
* HOME=pw->pw_dir
|
|
* SHELL=shell
|
|
* else does nothing
|
|
*/
|
|
#define SETUP_ENV_CHANGEENV (1 << 0)
|
|
#define SETUP_ENV_CLEARENV (1 << 1)
|
|
#define SETUP_ENV_TO_TMP (1 << 2)
|
|
#define SETUP_ENV_NO_CHDIR (1 << 4)
|
|
void setup_environment(const char *shell, int flags, const struct passwd *pw) FAST_FUNC;
|
|
void nuke_str(char *str) FAST_FUNC;
|
|
int check_password(const struct passwd *pw, const char *plaintext) FAST_FUNC;
|
|
int ask_and_check_password_extended(const struct passwd *pw, int timeout, const char *prompt) FAST_FUNC;
|
|
int ask_and_check_password(const struct passwd *pw) FAST_FUNC;
|
|
/* Returns a malloced string */
|
|
#if !ENABLE_USE_BB_CRYPT
|
|
#define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt)
|
|
#endif
|
|
extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC;
|
|
extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC;
|
|
/*
|
|
* rnd is additional random input. New one is returned.
|
|
* Useful if you call crypt_make_salt many times in a row:
|
|
* rnd = crypt_make_salt(buf1, 4, 0);
|
|
* rnd = crypt_make_salt(buf2, 4, rnd);
|
|
* rnd = crypt_make_salt(buf3, 4, rnd);
|
|
* (otherwise we risk having same salt generated)
|
|
*/
|
|
extern int crypt_make_salt(char *p, int cnt /*, int rnd*/) FAST_FUNC;
|
|
/* "$N$" + sha_salt_16_bytes + NUL */
|
|
#define MAX_PW_SALT_LEN (3 + 16 + 1)
|
|
extern char* crypt_make_pw_salt(char p[MAX_PW_SALT_LEN], const char *algo) FAST_FUNC;
|
|
|
|
|
|
/* Returns number of lines changed, or -1 on error */
|
|
#if !(ENABLE_FEATURE_ADDUSER_TO_GROUP || ENABLE_FEATURE_DEL_USER_FROM_GROUP)
|
|
#define update_passwd(filename, username, data, member) \
|
|
update_passwd(filename, username, data)
|
|
#endif
|
|
extern int update_passwd(const char *filename,
|
|
const char *username,
|
|
const char *data,
|
|
const char *member) FAST_FUNC;
|
|
|
|
int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC;
|
|
int index_in_strings(const char *strings, const char *key) FAST_FUNC;
|
|
int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC;
|
|
int index_in_substrings(const char *strings, const char *key) FAST_FUNC;
|
|
const char *nth_string(const char *strings, int n) FAST_FUNC;
|
|
|
|
extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC;
|
|
extern void print_login_prompt(void) FAST_FUNC;
|
|
|
|
char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC;
|
|
/* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
|
|
int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
|
|
|
|
#ifndef __GNO__
|
|
int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
|
|
#endif
|
|
|
|
/* NB: "unsigned request" is crucial! "int request" will break some arches! */
|
|
int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
|
|
int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
|
|
#if ENABLE_IOCTL_HEX2STR_ERROR
|
|
int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
|
|
int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
|
|
#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request)
|
|
#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request)
|
|
#else
|
|
int bb_ioctl_or_warn(int fd, unsigned request, void *argp) FAST_FUNC;
|
|
int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC;
|
|
#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp)
|
|
#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp)
|
|
#endif
|
|
|
|
char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC;
|
|
void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC;
|
|
void reset_ino_dev_hashtable(void) FAST_FUNC;
|
|
#ifdef __GLIBC__
|
|
/* At least glibc has horrendously large inline for this, so wrap it */
|
|
unsigned long long bb_makedev(unsigned major, unsigned minor) FAST_FUNC;
|
|
#undef makedev
|
|
#define makedev(a,b) bb_makedev(a,b)
|
|
#endif
|
|
|
|
|
|
/* "Keycodes" that report an escape sequence.
|
|
* We use something which fits into signed char,
|
|
* yet doesn't represent any valid Unicode character.
|
|
* Also, -1 is reserved for error indication and we don't use it. */
|
|
enum {
|
|
KEYCODE_UP = -2,
|
|
KEYCODE_DOWN = -3,
|
|
KEYCODE_RIGHT = -4,
|
|
KEYCODE_LEFT = -5,
|
|
KEYCODE_HOME = -6,
|
|
KEYCODE_END = -7,
|
|
KEYCODE_INSERT = -8,
|
|
KEYCODE_DELETE = -9,
|
|
KEYCODE_PAGEUP = -10,
|
|
KEYCODE_PAGEDOWN = -11,
|
|
// -12 is reserved for Alt/Ctrl/Shift-TAB
|
|
#if 0
|
|
KEYCODE_FUN1 = -13,
|
|
KEYCODE_FUN2 = -14,
|
|
KEYCODE_FUN3 = -15,
|
|
KEYCODE_FUN4 = -16,
|
|
KEYCODE_FUN5 = -17,
|
|
KEYCODE_FUN6 = -18,
|
|
KEYCODE_FUN7 = -19,
|
|
KEYCODE_FUN8 = -20,
|
|
KEYCODE_FUN9 = -21,
|
|
KEYCODE_FUN10 = -22,
|
|
KEYCODE_FUN11 = -23,
|
|
KEYCODE_FUN12 = -24,
|
|
#endif
|
|
/* Be sure that last defined value is small enough
|
|
* to not interfere with Alt/Ctrl/Shift bits.
|
|
* So far we do not exceed -31 (0xfff..fffe1),
|
|
* which gives us three upper bits in LSB to play with.
|
|
*/
|
|
//KEYCODE_SHIFT_TAB = (-12) & ~0x80,
|
|
//KEYCODE_SHIFT_... = KEYCODE_... & ~0x80,
|
|
//KEYCODE_CTRL_UP = KEYCODE_UP & ~0x40,
|
|
//KEYCODE_CTRL_DOWN = KEYCODE_DOWN & ~0x40,
|
|
KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
|
|
KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
|
|
//KEYCODE_ALT_UP = KEYCODE_UP & ~0x20,
|
|
//KEYCODE_ALT_DOWN = KEYCODE_DOWN & ~0x20,
|
|
KEYCODE_ALT_RIGHT = KEYCODE_RIGHT & ~0x20,
|
|
KEYCODE_ALT_LEFT = KEYCODE_LEFT & ~0x20,
|
|
|
|
KEYCODE_CURSOR_POS = -0x100, /* 0xfff..fff00 */
|
|
/* How long is the longest ESC sequence we know?
|
|
* We want it big enough to be able to contain
|
|
* cursor position sequence "ESC [ 9999 ; 9999 R"
|
|
*/
|
|
KEYCODE_BUFFER_SIZE = 16
|
|
};
|
|
/* Note: fd may be in blocking or non-blocking mode, both make sense.
|
|
* For one, less uses non-blocking mode.
|
|
* Only the first read syscall inside read_key may block indefinitely
|
|
* (unless fd is in non-blocking mode),
|
|
* subsequent reads will time out after a few milliseconds.
|
|
* Return of -1 means EOF or error (errno == 0 on EOF).
|
|
* buffer[0] is used as a counter of buffered chars and must be 0
|
|
* on first call.
|
|
* timeout:
|
|
* -2: do not poll for input;
|
|
* -1: poll(-1) (i.e. block);
|
|
* >=0: poll for TIMEOUT milliseconds, return -1/EAGAIN on timeout
|
|
*/
|
|
int32_t read_key(int fd, char *buffer, int timeout) FAST_FUNC;
|
|
void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC;
|
|
|
|
/* Terminal escape sequences to process in input */
|
|
struct escape_seq {
|
|
char *seq;
|
|
signed char keycode;
|
|
};
|
|
extern struct escape_seq escape_seqs[];
|
|
extern int n_escape_seqs;
|
|
|
|
#if ENABLE_FEATURE_EDITING
|
|
/* It's NOT just ENABLEd or disabled. It's a number: */
|
|
# if defined CONFIG_FEATURE_EDITING_HISTORY && CONFIG_FEATURE_EDITING_HISTORY > 0
|
|
# define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0)
|
|
unsigned size_from_HISTFILESIZE(const char *hp) FAST_FUNC;
|
|
# else
|
|
# define MAX_HISTORY 0
|
|
# endif
|
|
typedef struct line_input_t {
|
|
int flags;
|
|
const char *path_lookup;
|
|
# if MAX_HISTORY
|
|
int cnt_history;
|
|
int cur_history;
|
|
int max_history; /* must never be <= 0 */
|
|
# if ENABLE_FEATURE_EDITING_SAVEHISTORY
|
|
/* meaning of this field depends on FEATURE_EDITING_SAVE_ON_EXIT:
|
|
* if !FEATURE_EDITING_SAVE_ON_EXIT: "how many lines are
|
|
* in on-disk history"
|
|
* if FEATURE_EDITING_SAVE_ON_EXIT: "how many in-memory lines are
|
|
* also in on-disk history (and thus need to be skipped on save)"
|
|
*/
|
|
unsigned cnt_history_in_file;
|
|
const char *hist_file;
|
|
# endif
|
|
char *history[MAX_HISTORY + 1];
|
|
# endif
|
|
} line_input_t;
|
|
enum {
|
|
DO_HISTORY = 1 * (MAX_HISTORY > 0),
|
|
TAB_COMPLETION = 2 * ENABLE_FEATURE_TAB_COMPLETION,
|
|
USERNAME_COMPLETION = 4 * ENABLE_FEATURE_USERNAME_COMPLETION,
|
|
VI_MODE = 8 * ENABLE_FEATURE_EDITING_VI,
|
|
WITH_PATH_LOOKUP = 0x10,
|
|
FOR_SHELL = DO_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION
|
|
};
|
|
line_input_t *new_line_input_t(int flags) FAST_FUNC;
|
|
/* So far static: void free_line_input_t(line_input_t *n) FAST_FUNC; */
|
|
/*
|
|
* maxsize must be >= 2.
|
|
* Returns:
|
|
* -1 on read errors or EOF, or on bare Ctrl-D,
|
|
* 0 on ctrl-C (the line entered is still returned in 'command'),
|
|
* >0 length of input string, including terminating '\n'
|
|
*/
|
|
int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout) FAST_FUNC;
|
|
void show_history(const line_input_t *st) FAST_FUNC;
|
|
# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
|
|
void save_history(line_input_t *st);
|
|
# endif
|
|
#else
|
|
#define MAX_HISTORY 0
|
|
int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
|
|
#define read_line_input(state, prompt, command, maxsize, timeout) \
|
|
read_line_input(prompt, command, maxsize)
|
|
#endif
|
|
|
|
|
|
#ifndef COMM_LEN
|
|
# ifdef TASK_COMM_LEN
|
|
enum { COMM_LEN = TASK_COMM_LEN };
|
|
# else
|
|
/* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */
|
|
enum { COMM_LEN = 16 };
|
|
# endif
|
|
#endif
|
|
|
|
struct smaprec {
|
|
unsigned long mapped_rw;
|
|
unsigned long mapped_ro;
|
|
unsigned long shared_clean;
|
|
unsigned long shared_dirty;
|
|
unsigned long private_clean;
|
|
unsigned long private_dirty;
|
|
unsigned long stack;
|
|
unsigned long smap_pss, smap_swap;
|
|
unsigned long smap_size;
|
|
unsigned long smap_start;
|
|
char smap_mode[5];
|
|
char *smap_name;
|
|
};
|
|
|
|
#if !ENABLE_PMAP
|
|
#define procps_read_smaps(pid, total, cb, data) \
|
|
procps_read_smaps(pid, total)
|
|
#endif
|
|
int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total,
|
|
void (*cb)(struct smaprec *, void *), void *data);
|
|
|
|
|
|
/* Format cmdline (up to col chars) into char buf[size] */
|
|
/* Puts [comm] if cmdline is empty (-> process is a kernel thread) */
|
|
void read_cmdline(char *buf, int size, unsigned pid, const char *comm) FAST_FUNC;
|
|
pid_t *find_pid_by_name(const char* procName) FAST_FUNC;
|
|
pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC;
|
|
int starts_with_cpu(const char *str) FAST_FUNC;
|
|
unsigned get_cpu_count(void) FAST_FUNC;
|
|
|
|
|
|
/* Use strict=1 if you process input from untrusted source:
|
|
* it will return NULL on invalid %xx (bad hex chars)
|
|
* and str + 1 if decoded char is / or NUL.
|
|
* In non-strict mode, it always succeeds (returns str),
|
|
* and also it additionally decoded '+' to space.
|
|
*/
|
|
char *percent_decode_in_place(char *str, int strict) FAST_FUNC;
|
|
|
|
|
|
uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC;
|
|
uint32_t crc32_block_endian1(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
|
|
uint32_t crc32_block_endian0(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
|
|
|
|
typedef struct masks_labels_t {
|
|
const char *labels;
|
|
const int masks[];
|
|
} masks_labels_t;
|
|
int print_flags_separated(const int *masks, const char *labels,
|
|
int flags, const char *separator) FAST_FUNC;
|
|
int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC;
|
|
|
|
typedef struct bb_progress_t {
|
|
unsigned last_size;
|
|
unsigned last_update_sec;
|
|
unsigned last_change_sec;
|
|
unsigned start_sec;
|
|
const char *curfile;
|
|
} bb_progress_t;
|
|
|
|
#define is_bb_progress_inited(p) ((p)->curfile != NULL)
|
|
#define bb_progress_free(p) do { \
|
|
if (ENABLE_UNICODE_SUPPORT) free((char*)((p)->curfile)); \
|
|
(p)->curfile = NULL; \
|
|
} while (0)
|
|
void bb_progress_init(bb_progress_t *p, const char *curfile) FAST_FUNC;
|
|
void bb_progress_update(bb_progress_t *p,
|
|
uoff_t beg_range,
|
|
uoff_t transferred,
|
|
uoff_t totalsize) FAST_FUNC;
|
|
|
|
|
|
/* Some older linkers don't perform string merging, we used to have common strings
|
|
* as global arrays to do it by hand. But:
|
|
* (1) newer linkers do it themselves,
|
|
* (2) however, they DONT merge string constants with global arrays,
|
|
* even if the value is the same (!). Thus global arrays actually
|
|
* increased size a bit: for example, "/etc/passwd" string from libc
|
|
* wasn't merged with bb_path_passwd_file[] array!
|
|
* Therefore now we use #defines.
|
|
*/
|
|
/* "BusyBox vN.N.N (timestamp or extra_version)" */
|
|
extern const char bb_banner[] ALIGN1;
|
|
extern const char bb_msg_memory_exhausted[] ALIGN1;
|
|
extern const char bb_msg_invalid_date[] ALIGN1;
|
|
#define bb_msg_read_error "read error"
|
|
#define bb_msg_write_error "write error"
|
|
extern const char bb_msg_unknown[] ALIGN1;
|
|
extern const char bb_msg_can_not_create_raw_socket[] ALIGN1;
|
|
extern const char bb_msg_perm_denied_are_you_root[] ALIGN1;
|
|
extern const char bb_msg_you_must_be_root[] ALIGN1;
|
|
extern const char bb_msg_requires_arg[] ALIGN1;
|
|
extern const char bb_msg_invalid_arg[] ALIGN1;
|
|
extern const char bb_msg_standard_input[] ALIGN1;
|
|
extern const char bb_msg_standard_output[] ALIGN1;
|
|
|
|
/* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */
|
|
extern const char bb_hexdigits_upcase[] ALIGN1;
|
|
|
|
extern const char bb_path_wtmp_file[] ALIGN1;
|
|
|
|
#ifndef __GNO__
|
|
# define bb_dev_null "/dev/null"
|
|
#else
|
|
# define bb_dev_null ".null"
|
|
#endif
|
|
|
|
extern const int const_int_0;
|
|
//extern const int const_int_1;
|
|
|
|
|
|
/* Providing hard guarantee on minimum size (think of BUFSIZ == 128) */
|
|
enum { COMMON_BUFSIZE = (BUFSIZ >= 256*sizeof(void*) ? BUFSIZ+1 : 256*sizeof(void*)) };
|
|
extern char bb_common_bufsiz1[COMMON_BUFSIZE];
|
|
/* At least gcc 3.4.6 on mipsel system needs optimization barrier */
|
|
#ifndef __ORCAC__
|
|
# define barrier() __asm__ __volatile__("":::"memory")
|
|
#else
|
|
# define barrier()
|
|
#endif
|
|
|
|
/* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
|
|
* use bb_default_login_shell and following defines.
|
|
* If you change LIBBB_DEFAULT_LOGIN_SHELL,
|
|
* don't forget to change increment constant. */
|
|
#define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh"
|
|
|
|
#define ARRAY_SIZE(x) ((size_t)(sizeof(x) / sizeof((x)[0])))
|
|
/* ORCA/C will sometimes barf on the expression in ARRAY_SIZE, depending on the element type
|
|
* (e.g. for arrays of structs). When it does, use ARRAY_SIZE2 instead. */
|
|
#define ARRAY_SIZE2(x, elttype) ((size_t)(sizeof(x) / sizeof(elttype)))
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|
|
|
|
|
/* We redefine ctype macros. Unicode-correct handling of char types
|
|
* can't be done with such byte-oriented operations anyway,
|
|
* we don't lose anything.
|
|
*/
|
|
#ifndef __ORCAC__
|
|
// ORCA/C barfs on (at least) isspace, so we'll just use the standard versions of these.
|
|
#undef isalnum
|
|
#undef isalpha
|
|
#undef isascii
|
|
#undef isblank
|
|
#undef iscntrl
|
|
#undef isdigit
|
|
#undef isgraph
|
|
#undef islower
|
|
#undef isprint
|
|
#undef ispunct
|
|
#undef isspace
|
|
#undef isupper
|
|
#undef isxdigit
|
|
#undef toupper
|
|
#undef tolower
|
|
|
|
/* We save ~500 bytes on isdigit alone.
|
|
* BTW, x86 likes (unsigned char) cast more than (unsigned). */
|
|
|
|
/* These work the same for ASCII and Unicode,
|
|
* assuming no one asks "is this a *Unicode* letter?" using isalpha(letter) */
|
|
#define isascii(a) ((unsigned char)(a) <= 0x7f)
|
|
#define isdigit(a) ((unsigned char)((a) - '0') <= 9)
|
|
#define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A'))
|
|
#define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a'))
|
|
#define isalpha(a) ((unsigned char)(((a)|0x20) - 'a') <= ('z' - 'a'))
|
|
#define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; })
|
|
#define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; })
|
|
/* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space.
|
|
* "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
|
|
*/
|
|
#define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
|
|
// Unsafe wrt NUL: #define ispunct(a) (strchr("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a)) != NULL)
|
|
#define ispunct(a) (strchrnul("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a))[0])
|
|
// Bigger code: #define isalnum(a) ({ unsigned char bb__isalnum = (a) - '0'; bb__isalnum <= 9 || ((bb__isalnum - ('A' - '0')) & 0xdf) <= 25; })
|
|
#define isalnum(a) bb_ascii_isalnum(a)
|
|
static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a)
|
|
{
|
|
unsigned char b = a - '0';
|
|
if (b <= 9)
|
|
return (b <= 9);
|
|
b = (a|0x20) - 'a';
|
|
return b <= 'z' - 'a';
|
|
}
|
|
#define isxdigit(a) bb_ascii_isxdigit(a)
|
|
static ALWAYS_INLINE int bb_ascii_isxdigit(unsigned char a)
|
|
{
|
|
unsigned char b = a - '0';
|
|
if (b <= 9)
|
|
return (b <= 9);
|
|
b = (a|0x20) - 'a';
|
|
return b <= 'f' - 'a';
|
|
}
|
|
#define toupper(a) bb_ascii_toupper(a)
|
|
static ALWAYS_INLINE unsigned char bb_ascii_toupper(unsigned char a)
|
|
{
|
|
unsigned char b = a - 'a';
|
|
if (b <= ('z' - 'a'))
|
|
a -= 'a' - 'A';
|
|
return a;
|
|
}
|
|
#define tolower(a) bb_ascii_tolower(a)
|
|
static ALWAYS_INLINE unsigned char bb_ascii_tolower(unsigned char a)
|
|
{
|
|
unsigned char b = a - 'A';
|
|
if (b <= ('Z' - 'A'))
|
|
a += 'a' - 'A';
|
|
return a;
|
|
}
|
|
|
|
/* In ASCII and Unicode, these are likely to be very different.
|
|
* Let's prevent ambiguous usage from the start */
|
|
#define isgraph(a) isgraph_is_ambiguous_dont_use(a)
|
|
#define isprint(a) isprint_is_ambiguous_dont_use(a)
|
|
/* NB: must not treat EOF as isgraph or isprint */
|
|
#define isgraph_asciionly(a) ((unsigned)((a) - 0x21) <= 0x7e - 0x21)
|
|
#define isprint_asciionly(a) ((unsigned)((a) - 0x20) <= 0x7e - 0x20)
|
|
#endif /* !defined(__ORCAC__) */
|
|
|
|
|
|
/* Signal to the parent that it can resume executing after a fork,
|
|
* because the child is about to exec or terminate.
|
|
*/
|
|
void signal_parent_to_resume(void);
|
|
int is_forked_child(void);
|
|
|
|
/* Get path of current executable */
|
|
char *get_exec_path(void);
|
|
|
|
/* On GNO, we need to use this wrapper because _exit is broken when
|
|
* called from forked child processes. */
|
|
#ifdef __GNO__
|
|
void _exit_wrapper(int status) NORETURN;
|
|
# define _exit(s) _exit_wrapper(s)
|
|
#endif
|
|
|
|
/* Simple unit-testing framework */
|
|
|
|
typedef void (*bbunit_testfunc)(void);
|
|
|
|
struct bbunit_listelem {
|
|
const char* name;
|
|
bbunit_testfunc testfunc;
|
|
};
|
|
|
|
void bbunit_registertest(struct bbunit_listelem* test);
|
|
void bbunit_settestfailed(void);
|
|
|
|
#define BBUNIT_DEFINE_TEST(NAME) \
|
|
static void bbunit_##NAME##_test(void); \
|
|
static struct bbunit_listelem bbunit_##NAME##_elem = { \
|
|
.name = #NAME, \
|
|
.testfunc = bbunit_##NAME##_test, \
|
|
}; \
|
|
static void INIT_FUNC bbunit_##NAME##_register(void) \
|
|
{ \
|
|
bbunit_registertest(&bbunit_##NAME##_elem); \
|
|
} \
|
|
static void bbunit_##NAME##_test(void)
|
|
|
|
/*
|
|
* Both 'goto bbunit_end' and 'break' are here only to get rid
|
|
* of compiler warnings.
|
|
*/
|
|
#define BBUNIT_ENDTEST \
|
|
do { \
|
|
goto bbunit_end; \
|
|
bbunit_end: \
|
|
break; \
|
|
} while (0)
|
|
|
|
#define BBUNIT_PRINTASSERTFAIL \
|
|
do { \
|
|
bb_error_msg( \
|
|
"[ERROR] Assertion failed in file %s, line %d", \
|
|
__FILE__, __LINE__); \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERTION_FAILED \
|
|
do { \
|
|
bbunit_settestfailed(); \
|
|
goto bbunit_end; \
|
|
} while (0)
|
|
|
|
/*
|
|
* Assertions.
|
|
* For now we only offer assertions which cause tests to fail
|
|
* immediately. In the future 'expects' might be added too -
|
|
* similar to those offered by the gtest framework.
|
|
*/
|
|
#define BBUNIT_ASSERT_EQ(EXPECTED, ACTUAL) \
|
|
do { \
|
|
if ((EXPECTED) != (ACTUAL)) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] '%s' isn't equal to '%s'", \
|
|
#EXPECTED, #ACTUAL); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_NOTEQ(EXPECTED, ACTUAL) \
|
|
do { \
|
|
if ((EXPECTED) == (ACTUAL)) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] '%s' is equal to '%s'", \
|
|
#EXPECTED, #ACTUAL); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_NOTNULL(PTR) \
|
|
do { \
|
|
if ((PTR) == NULL) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] '%s' is NULL!", #PTR); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_NULL(PTR) \
|
|
do { \
|
|
if ((PTR) != NULL) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] '%s' is not NULL!", #PTR); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_FALSE(STATEMENT) \
|
|
do { \
|
|
if ((STATEMENT)) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] Statement '%s' evaluated to true!", \
|
|
#STATEMENT); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_TRUE(STATEMENT) \
|
|
do { \
|
|
if (!(STATEMENT)) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] Statement '%s' evaluated to false!", \
|
|
#STATEMENT); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_STREQ(STR1, STR2) \
|
|
do { \
|
|
if (strcmp(STR1, STR2) != 0) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] Strings '%s' and '%s' " \
|
|
"are not the same", STR1, STR2); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_STRNOTEQ(STR1, STR2) \
|
|
do { \
|
|
if (strcmp(STR1, STR2) == 0) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] Strings '%s' and '%s' " \
|
|
"are the same, but were " \
|
|
"expected to differ", STR1, STR2); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
|
|
POP_SAVED_FUNCTION_VISIBILITY
|
|
|
|
#endif
|