mirror of
https://github.com/sheumann/hush.git
synced 2024-08-30 22:29:40 +00:00
1843 lines
40 KiB
C
1843 lines
40 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) tons of folks. Tracking down who wrote what
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* isn't something I'm going to worry about... If you wrote something
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* here, please feel free to acknowledge your work.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 the GPL.
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <time.h>
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#include <utime.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <sys/ioctl.h>
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#include <sys/utsname.h> /* for uname(2) */
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#include "busybox.h"
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#if defined (BB_CHMOD_CHOWN_CHGRP) \
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|| defined (BB_CP_MV) \
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|| defined (BB_FIND) \
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|| defined (BB_INSMOD) \
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|| defined (BB_LS) \
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|| defined (BB_RM) \
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|| defined (BB_TAR)
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/* same conditions as recursive_action */
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#define bb_need_name_too_long
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#endif
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#define bb_need_memory_exhausted
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#define bb_need_full_version
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#define BB_DECLARE_EXTERN
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#include "messages.c"
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#include "pwd_grp/pwd.h"
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#include "pwd_grp/grp.h"
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/* for the _syscall() macros */
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#include <sys/syscall.h>
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#include <linux/unistd.h>
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/* Busybox mount uses either /proc/filesystems or /dev/mtab to get the
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* list of available filesystems used for the -t auto option */
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#if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
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# if defined BB_MTAB
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const char mtab_file[] = "/etc/mtab";
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# else
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# if defined BB_FEATURE_USE_DEVPS_PATCH
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const char mtab_file[] = "/dev/mtab";
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# else
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const char mtab_file[] = "/proc/mounts";
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# endif
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# endif
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#endif
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static struct BB_applet *applet_using;
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extern void show_usage(void)
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{
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const char *format_string;
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const char *usage_string = usage_messages;
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int i;
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for (i = applet_using - applets; i > 0; ) {
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if (!*usage_string++) {
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--i;
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}
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}
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format_string = "%s\n\nUsage: %s %s\n\n";
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if(*usage_string == 0)
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format_string = "%s\n\nNo help available.\n\n";
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fprintf(stderr, format_string,
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full_version, applet_using->name, usage_string);
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exit(EXIT_FAILURE);
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}
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static void verror_msg(const char *s, va_list p)
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{
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fflush(stdout);
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fprintf(stderr, "%s: ", applet_name);
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vfprintf(stderr, s, p);
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}
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extern void error_msg(const char *s, ...)
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{
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va_list p;
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va_start(p, s);
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verror_msg(s, p);
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va_end(p);
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putc('\n', stderr);
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}
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extern void error_msg_and_die(const char *s, ...)
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{
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va_list p;
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va_start(p, s);
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verror_msg(s, p);
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va_end(p);
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putc('\n', stderr);
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exit(EXIT_FAILURE);
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}
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static void vperror_msg(const char *s, va_list p)
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{
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int err=errno;
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if(s == 0) s = "";
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verror_msg(s, p);
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if (*s) s = ": ";
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fprintf(stderr, "%s%s\n", s, strerror(err));
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}
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extern void perror_msg(const char *s, ...)
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{
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va_list p;
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va_start(p, s);
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vperror_msg(s, p);
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va_end(p);
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}
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extern void perror_msg_and_die(const char *s, ...)
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{
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va_list p;
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va_start(p, s);
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vperror_msg(s, p);
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va_end(p);
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exit(EXIT_FAILURE);
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}
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#if defined BB_INIT || defined BB_MKSWAP || defined BB_MOUNT || defined BB_NFSMOUNT
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/* Returns kernel version encoded as major*65536 + minor*256 + patch,
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* so, for example, to check if the kernel is greater than 2.2.11:
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* if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
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*/
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extern int get_kernel_revision(void)
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{
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struct utsname name;
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char *s;
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int i, r;
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if (uname(&name) == -1) {
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perror_msg("cannot get system information");
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return (0);
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}
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s = name.release;
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r = 0;
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for (i=0 ; i<3 ; i++) {
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r = r * 256 + atoi(strtok(s, "."));
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s = NULL;
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}
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return r;
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}
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#endif /* BB_INIT */
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#if defined BB_FREE || defined BB_INIT || defined BB_UNAME || defined BB_UPTIME
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_syscall1(int, sysinfo, struct sysinfo *, info);
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#endif /* BB_INIT */
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#if defined BB_MOUNT || defined BB_UMOUNT
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#ifndef __NR_umount2
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static const int __NR_umount2 = 52;
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#endif
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/* Include our own version of <sys/mount.h>, since libc5 doesn't
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* know about umount2 */
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extern _syscall1(int, umount, const char *, special_file);
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extern _syscall2(int, umount2, const char *, special_file, int, flags);
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extern _syscall5(int, mount, const char *, special_file, const char *, dir,
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const char *, fstype, unsigned long int, rwflag, const void *, data);
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#endif
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#if defined BB_FEATURE_NEW_MODULE_INTERFACE && ( defined BB_INSMOD || defined BB_LSMOD )
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#ifndef __NR_query_module
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static const int __NR_query_module = 167;
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#endif
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_syscall5(int, query_module, const char *, name, int, which,
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void *, buf, size_t, bufsize, size_t*, ret);
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#endif
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#if defined (BB_CP_MV) || defined (BB_DU)
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#define HASH_SIZE 311 /* Should be prime */
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#define hash_inode(i) ((i) % HASH_SIZE)
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static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE];
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/*
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* Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in
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* `ino_dev_hashtable', else return 0
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*
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* If NAME is a non-NULL pointer to a character pointer, and there is
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* a match, then set *NAME to the value of the name slot in that
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* bucket.
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*/
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int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name)
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{
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ino_dev_hashtable_bucket_t *bucket;
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bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
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while (bucket != NULL) {
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if ((bucket->ino == statbuf->st_ino) &&
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(bucket->dev == statbuf->st_dev))
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{
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if (name) *name = bucket->name;
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return 1;
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}
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bucket = bucket->next;
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}
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return 0;
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}
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/* Add statbuf to statbuf hash table */
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void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
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{
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int i;
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size_t s;
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ino_dev_hashtable_bucket_t *bucket;
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i = hash_inode(statbuf->st_ino);
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s = name ? strlen(name) : 0;
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bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s);
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bucket->ino = statbuf->st_ino;
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bucket->dev = statbuf->st_dev;
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if (name)
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strcpy(bucket->name, name);
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else
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bucket->name[0] = '\0';
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bucket->next = ino_dev_hashtable[i];
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ino_dev_hashtable[i] = bucket;
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}
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/* Clear statbuf hash table */
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void reset_ino_dev_hashtable(void)
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{
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int i;
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ino_dev_hashtable_bucket_t *bucket;
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for (i = 0; i < HASH_SIZE; i++) {
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while (ino_dev_hashtable[i] != NULL) {
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bucket = ino_dev_hashtable[i]->next;
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free(ino_dev_hashtable[i]);
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ino_dev_hashtable[i] = bucket;
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}
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}
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}
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#endif /* BB_CP_MV || BB_DU */
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#if defined (BB_CP_MV) || defined (BB_DU) || defined (BB_LN) || defined (BB_DPKG_DEB)
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/*
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* Return TRUE if a fileName is a directory.
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* Nonexistant files return FALSE.
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*/
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int is_directory(const char *fileName, const int followLinks, struct stat *statBuf)
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{
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int status;
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int didMalloc = 0;
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if (statBuf == NULL) {
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statBuf = (struct stat *)xmalloc(sizeof(struct stat));
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++didMalloc;
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}
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if (followLinks == TRUE)
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status = stat(fileName, statBuf);
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else
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status = lstat(fileName, statBuf);
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if (status < 0 || !(S_ISDIR(statBuf->st_mode))) {
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status = FALSE;
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}
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else status = TRUE;
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if (didMalloc) {
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free(statBuf);
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statBuf = NULL;
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}
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return status;
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}
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#endif
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#if defined BB_AR || defined BB_CP_MV
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/*
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* Copy chunksize bytes between two file descriptors
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*/
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int copy_file_chunk(int srcfd, int dstfd, size_t chunksize)
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{
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size_t size;
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char buffer[BUFSIZ]; /* BUFSIZ is declared in stdio.h */
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while (chunksize > 0) {
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if (chunksize > BUFSIZ)
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size = BUFSIZ;
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else
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size = chunksize;
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if (full_write(dstfd, buffer, full_read(srcfd, buffer, size)) < size)
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return(FALSE);
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chunksize -= size;
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}
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return (TRUE);
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}
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#endif
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#if defined (BB_CP_MV) || defined BB_DPKG
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/*
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* Copy one file to another, while possibly preserving its modes, times, and
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* modes. Returns TRUE if successful, or FALSE on a failure with an error
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* message output. (Failure is not indicated if attributes cannot be set.)
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* -Erik Andersen
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*/
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int
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copy_file(const char *srcName, const char *destName,
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int setModes, int followLinks, int forceFlag)
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{
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int rfd;
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int wfd;
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int status;
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struct stat srcStatBuf;
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struct stat dstStatBuf;
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struct utimbuf times;
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if (followLinks == TRUE)
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status = stat(srcName, &srcStatBuf);
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else
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status = lstat(srcName, &srcStatBuf);
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if (status < 0) {
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perror_msg("%s", srcName);
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return FALSE;
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}
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if (followLinks == TRUE)
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status = stat(destName, &dstStatBuf);
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else
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status = lstat(destName, &dstStatBuf);
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if (status < 0 || forceFlag==TRUE) {
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unlink(destName);
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dstStatBuf.st_ino = -1;
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dstStatBuf.st_dev = -1;
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}
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if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
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(srcStatBuf.st_ino == dstStatBuf.st_ino)) {
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error_msg("Copying file \"%s\" to itself", srcName);
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return FALSE;
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}
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if (S_ISDIR(srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
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/* Make sure the directory is writable */
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status = mkdir(destName, 0777777 ^ umask(0));
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if (status < 0 && errno != EEXIST) {
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perror_msg("%s", destName);
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return FALSE;
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}
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} else if (S_ISLNK(srcStatBuf.st_mode)) {
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char link_val[BUFSIZ + 1];
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int link_size;
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//fprintf(stderr, "copying link %s to %s\n", srcName, destName);
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/* Warning: This could possibly truncate silently, to BUFSIZ chars */
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link_size = readlink(srcName, &link_val[0], BUFSIZ);
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if (link_size < 0) {
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perror_msg("%s", srcName);
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return FALSE;
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}
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link_val[link_size] = '\0';
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status = symlink(link_val, destName);
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|
if (status < 0) {
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perror_msg("%s", destName);
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return FALSE;
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}
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|
#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
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|
if (setModes == TRUE) {
|
|
/* Try to set owner, but fail silently like GNU cp */
|
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lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
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}
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#endif
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return TRUE;
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} else if (S_ISFIFO(srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
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if (mkfifo(destName, 0644) < 0) {
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perror_msg("%s", destName);
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return FALSE;
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}
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} else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
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|| S_ISSOCK(srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
|
|
if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
|
|
perror_msg("%s", destName);
|
|
return FALSE;
|
|
}
|
|
} else if (S_ISREG(srcStatBuf.st_mode)) {
|
|
//fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
|
|
rfd = open(srcName, O_RDONLY);
|
|
if (rfd < 0) {
|
|
perror_msg("%s", srcName);
|
|
return FALSE;
|
|
}
|
|
|
|
wfd = open(destName, O_WRONLY | O_CREAT | O_TRUNC,
|
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srcStatBuf.st_mode);
|
|
if (wfd < 0) {
|
|
perror_msg("%s", destName);
|
|
close(rfd);
|
|
return FALSE;
|
|
}
|
|
|
|
if (copy_file_chunk(rfd, wfd, srcStatBuf.st_size)==FALSE)
|
|
goto error_exit;
|
|
|
|
close(rfd);
|
|
if (close(wfd) < 0) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
if (setModes == TRUE) {
|
|
/* This is fine, since symlinks never get here */
|
|
if (chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0)
|
|
perror_msg_and_die("%s", destName);
|
|
if (chmod(destName, srcStatBuf.st_mode) < 0)
|
|
perror_msg_and_die("%s", destName);
|
|
times.actime = srcStatBuf.st_atime;
|
|
times.modtime = srcStatBuf.st_mtime;
|
|
if (utime(destName, ×) < 0)
|
|
perror_msg_and_die("%s", destName);
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
error_exit:
|
|
perror_msg("%s", destName);
|
|
close(rfd);
|
|
close(wfd);
|
|
|
|
return FALSE;
|
|
}
|
|
#endif /* BB_CP_MV */
|
|
|
|
|
|
|
|
#if defined BB_TAR || defined BB_LS ||defined BB_AR
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|
|
|
#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
|
|
#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
|
|
|
|
/* The special bits. If set, display SMODE0/1 instead of MODE0/1 */
|
|
static const mode_t SBIT[] = {
|
|
0, 0, S_ISUID,
|
|
0, 0, S_ISGID,
|
|
0, 0, S_ISVTX
|
|
};
|
|
|
|
/* The 9 mode bits to test */
|
|
static const mode_t MBIT[] = {
|
|
S_IRUSR, S_IWUSR, S_IXUSR,
|
|
S_IRGRP, S_IWGRP, S_IXGRP,
|
|
S_IROTH, S_IWOTH, S_IXOTH
|
|
};
|
|
|
|
static const char MODE1[] = "rwxrwxrwx";
|
|
static const char MODE0[] = "---------";
|
|
static const char SMODE1[] = "..s..s..t";
|
|
static const char SMODE0[] = "..S..S..T";
|
|
|
|
/*
|
|
* Return the standard ls-like mode string from a file mode.
|
|
* This is static and so is overwritten on each call.
|
|
*/
|
|
const char *mode_string(int mode)
|
|
{
|
|
static char buf[12];
|
|
|
|
int i;
|
|
|
|
buf[0] = TYPECHAR(mode);
|
|
for (i = 0; i < 9; i++) {
|
|
if (mode & SBIT[i])
|
|
buf[i + 1] = (mode & MBIT[i]) ? SMODE1[i] : SMODE0[i];
|
|
else
|
|
buf[i + 1] = (mode & MBIT[i]) ? MODE1[i] : MODE0[i];
|
|
}
|
|
return buf;
|
|
}
|
|
#endif /* BB_TAR || BB_LS */
|
|
|
|
|
|
#if defined BB_TAR || defined BB_AR
|
|
/*
|
|
* Return the standard ls-like time string from a time_t
|
|
* This is static and so is overwritten on each call.
|
|
*/
|
|
const char *time_string(time_t timeVal)
|
|
{
|
|
time_t now;
|
|
char *str;
|
|
static char buf[26];
|
|
|
|
time(&now);
|
|
|
|
str = ctime(&timeVal);
|
|
|
|
strcpy(buf, &str[4]);
|
|
buf[12] = '\0';
|
|
|
|
if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) {
|
|
strcpy(&buf[7], &str[20]);
|
|
buf[11] = '\0';
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
#endif /* BB_TAR || BB_AR */
|
|
|
|
#if defined BB_DD || defined BB_NC || defined BB_TAIL || defined BB_TAR || defined BB_AR || defined BB_CP_MV
|
|
/*
|
|
* Write all of the supplied buffer out to a file.
|
|
* This does multiple writes as necessary.
|
|
* Returns the amount written, or -1 on an error.
|
|
*/
|
|
int full_write(int fd, const char *buf, int len)
|
|
{
|
|
int cc;
|
|
int total;
|
|
|
|
total = 0;
|
|
|
|
while (len > 0) {
|
|
cc = write(fd, buf, len);
|
|
|
|
if (cc < 0)
|
|
return -1;
|
|
|
|
buf += cc;
|
|
total += cc;
|
|
len -= cc;
|
|
}
|
|
|
|
return total;
|
|
}
|
|
#endif
|
|
|
|
#if defined BB_AR || defined BB_CP_MV || defined BB_SH || defined BB_TAR
|
|
/*
|
|
* Read all of the supplied buffer from a file.
|
|
* This does multiple reads as necessary.
|
|
* Returns the amount read, or -1 on an error.
|
|
* A short read is returned on an end of file.
|
|
*/
|
|
int full_read(int fd, char *buf, int len)
|
|
{
|
|
int cc;
|
|
int total;
|
|
|
|
total = 0;
|
|
|
|
while (len > 0) {
|
|
cc = read(fd, buf, len);
|
|
|
|
if (cc < 0)
|
|
return -1;
|
|
|
|
if (cc == 0)
|
|
break;
|
|
|
|
buf += cc;
|
|
total += cc;
|
|
len -= cc;
|
|
}
|
|
|
|
return total;
|
|
}
|
|
#endif /* BB_TAR || BB_TAIL || BB_AR || BB_SH */
|
|
|
|
|
|
#if defined (BB_CHMOD_CHOWN_CHGRP) \
|
|
|| defined (BB_CP_MV) \
|
|
|| defined (BB_FIND) \
|
|
|| defined (BB_INSMOD) \
|
|
|| defined (BB_LS) \
|
|
|| defined (BB_RM) \
|
|
|| defined (BB_TAR)
|
|
|
|
/*
|
|
* Walk down all the directories under the specified
|
|
* location, and do something (something specified
|
|
* by the fileAction and dirAction function pointers).
|
|
*
|
|
* Unfortunately, while nftw(3) could replace this and reduce
|
|
* code size a bit, nftw() wasn't supported before GNU libc 2.1,
|
|
* and so isn't sufficiently portable to take over since glibc2.1
|
|
* is so stinking huge.
|
|
*/
|
|
int recursive_action(const char *fileName,
|
|
int recurse, int followLinks, int depthFirst,
|
|
int (*fileAction) (const char *fileName,
|
|
struct stat * statbuf,
|
|
void* userData),
|
|
int (*dirAction) (const char *fileName,
|
|
struct stat * statbuf,
|
|
void* userData),
|
|
void* userData)
|
|
{
|
|
int status;
|
|
struct stat statbuf;
|
|
struct dirent *next;
|
|
|
|
if (followLinks == TRUE)
|
|
status = stat(fileName, &statbuf);
|
|
else
|
|
status = lstat(fileName, &statbuf);
|
|
|
|
if (status < 0) {
|
|
#ifdef BB_DEBUG_PRINT_SCAFFOLD
|
|
fprintf(stderr,
|
|
"status=%d followLinks=%d TRUE=%d\n",
|
|
status, followLinks, TRUE);
|
|
#endif
|
|
perror_msg("%s", fileName);
|
|
return FALSE;
|
|
}
|
|
|
|
if ((followLinks == FALSE) && (S_ISLNK(statbuf.st_mode))) {
|
|
if (fileAction == NULL)
|
|
return TRUE;
|
|
else
|
|
return fileAction(fileName, &statbuf, userData);
|
|
}
|
|
|
|
if (recurse == FALSE) {
|
|
if (S_ISDIR(statbuf.st_mode)) {
|
|
if (dirAction != NULL)
|
|
return (dirAction(fileName, &statbuf, userData));
|
|
else
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
if (S_ISDIR(statbuf.st_mode)) {
|
|
DIR *dir;
|
|
|
|
if (dirAction != NULL && depthFirst == FALSE) {
|
|
status = dirAction(fileName, &statbuf, userData);
|
|
if (status == FALSE) {
|
|
perror_msg("%s", fileName);
|
|
return FALSE;
|
|
} else if (status == SKIP)
|
|
return TRUE;
|
|
}
|
|
dir = opendir(fileName);
|
|
if (!dir) {
|
|
perror_msg("%s", fileName);
|
|
return FALSE;
|
|
}
|
|
while ((next = readdir(dir)) != NULL) {
|
|
char nextFile[BUFSIZ + 1];
|
|
|
|
if ((strcmp(next->d_name, "..") == 0)
|
|
|| (strcmp(next->d_name, ".") == 0)) {
|
|
continue;
|
|
}
|
|
if (strlen(fileName) + strlen(next->d_name) + 1 > BUFSIZ) {
|
|
error_msg(name_too_long);
|
|
return FALSE;
|
|
}
|
|
memset(nextFile, 0, sizeof(nextFile));
|
|
sprintf(nextFile, "%s/%s", fileName, next->d_name);
|
|
status =
|
|
recursive_action(nextFile, TRUE, followLinks, depthFirst,
|
|
fileAction, dirAction, userData);
|
|
if (status == FALSE) {
|
|
closedir(dir);
|
|
return FALSE;
|
|
}
|
|
}
|
|
status = closedir(dir);
|
|
if (status < 0) {
|
|
perror_msg("%s", fileName);
|
|
return FALSE;
|
|
}
|
|
if (dirAction != NULL && depthFirst == TRUE) {
|
|
status = dirAction(fileName, &statbuf, userData);
|
|
if (status == FALSE) {
|
|
perror_msg("%s", fileName);
|
|
return FALSE;
|
|
}
|
|
}
|
|
} else {
|
|
if (fileAction == NULL)
|
|
return TRUE;
|
|
else
|
|
return fileAction(fileName, &statbuf, userData);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
#endif /* BB_CHMOD_CHOWN_CHGRP || BB_CP_MV || BB_FIND || BB_LS || BB_INSMOD */
|
|
|
|
|
|
|
|
#if defined (BB_TAR) || defined (BB_MKDIR)
|
|
/*
|
|
* Attempt to create the directories along the specified path, except for
|
|
* the final component. The mode is given for the final directory only,
|
|
* while all previous ones get default protections. Errors are not reported
|
|
* here, as failures to restore files can be reported later.
|
|
*/
|
|
extern int create_path(const char *name, int mode)
|
|
{
|
|
char *cp;
|
|
char *cpOld;
|
|
char buf[BUFSIZ + 1];
|
|
int retVal = 0;
|
|
|
|
strcpy(buf, name);
|
|
for (cp = buf; *cp == '/'; cp++);
|
|
cp = strchr(cp, '/');
|
|
while (cp) {
|
|
cpOld = cp;
|
|
cp = strchr(cp + 1, '/');
|
|
*cpOld = '\0';
|
|
retVal = mkdir(buf, cp ? 0777 : mode);
|
|
if (retVal != 0 && errno != EEXIST) {
|
|
perror_msg("%s", buf);
|
|
return FALSE;
|
|
}
|
|
*cpOld = '/';
|
|
}
|
|
return TRUE;
|
|
}
|
|
#endif /* BB_TAR || BB_MKDIR */
|
|
|
|
|
|
|
|
#if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR) \
|
|
|| defined (BB_MKFIFO) || defined (BB_MKNOD) || defined (BB_AR)
|
|
/* [ugoa]{+|-|=}[rwxst] */
|
|
|
|
extern int parse_mode(const char *s, mode_t * theMode)
|
|
{
|
|
static const mode_t group_set[] = {
|
|
S_ISUID | S_IRWXU, /* u */
|
|
S_ISGID | S_IRWXG, /* g */
|
|
S_IRWXO, /* o */
|
|
S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO /* a */
|
|
};
|
|
|
|
static const mode_t mode_set[] = {
|
|
S_IRUSR | S_IRGRP | S_IROTH, /* r */
|
|
S_IWUSR | S_IWGRP | S_IWOTH, /* w */
|
|
S_IXUSR | S_IXGRP | S_IXOTH, /* x */
|
|
S_ISUID | S_ISGID, /* s */
|
|
S_ISVTX /* t */
|
|
};
|
|
|
|
static const char group_string[] = "ugoa";
|
|
static const char mode_string[] = "rwxst";
|
|
|
|
const char *p;
|
|
|
|
mode_t andMode =
|
|
S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
|
|
mode_t orMode = 0;
|
|
mode_t mode;
|
|
mode_t groups;
|
|
char type;
|
|
char c;
|
|
|
|
if (s==NULL) {
|
|
return (FALSE);
|
|
}
|
|
|
|
do {
|
|
mode = 0;
|
|
groups = 0;
|
|
NEXT_GROUP:
|
|
if ((c = *s++) == '\0') {
|
|
return -1;
|
|
}
|
|
for (p=group_string ; *p ; p++) {
|
|
if (*p == c) {
|
|
groups |= group_set[(int)(p-group_string)];
|
|
goto NEXT_GROUP;
|
|
}
|
|
}
|
|
switch (c) {
|
|
case '=':
|
|
case '+':
|
|
case '-':
|
|
type = c;
|
|
if (groups == 0) { /* The default is "all" */
|
|
groups |= S_ISUID | S_ISGID | S_ISVTX
|
|
| S_IRWXU | S_IRWXG | S_IRWXO;
|
|
}
|
|
break;
|
|
default:
|
|
if ((c < '0') || (c > '7') || (mode | groups)) {
|
|
return (FALSE);
|
|
} else {
|
|
*theMode = strtol(--s, NULL, 8);
|
|
return (TRUE);
|
|
}
|
|
}
|
|
|
|
NEXT_MODE:
|
|
if (((c = *s++) != '\0') && (c != ',')) {
|
|
for (p=mode_string ; *p ; p++) {
|
|
if (*p == c) {
|
|
mode |= mode_set[(int)(p-mode_string)];
|
|
goto NEXT_MODE;
|
|
}
|
|
}
|
|
break; /* We're done so break out of loop.*/
|
|
}
|
|
switch (type) {
|
|
case '=':
|
|
andMode &= ~(groups); /* Now fall through. */
|
|
case '+':
|
|
orMode |= mode & groups;
|
|
break;
|
|
case '-':
|
|
andMode &= ~(mode & groups);
|
|
orMode &= ~(mode & groups);
|
|
break;
|
|
}
|
|
} while (c == ',');
|
|
|
|
*theMode &= andMode;
|
|
*theMode |= orMode;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#endif
|
|
/* BB_CHMOD_CHOWN_CHGRP || BB_MKDIR || BB_MKFIFO || BB_MKNOD */
|
|
|
|
|
|
|
|
|
|
|
|
#if defined BB_CHMOD_CHOWN_CHGRP || defined BB_PS || defined BB_LS \
|
|
|| defined BB_TAR || defined BB_ID || defined BB_LOGGER \
|
|
|| defined BB_LOGNAME || defined BB_WHOAMI || defined BB_SH
|
|
/* returns a uid given a username */
|
|
long my_getpwnam(char *name)
|
|
{
|
|
struct passwd *myuser;
|
|
|
|
myuser = getpwnam(name);
|
|
if (myuser==NULL)
|
|
return(-1);
|
|
|
|
return myuser->pw_uid;
|
|
}
|
|
|
|
/* returns a gid given a group name */
|
|
long my_getgrnam(char *name)
|
|
{
|
|
struct group *mygroup;
|
|
|
|
mygroup = getgrnam(name);
|
|
if (mygroup==NULL)
|
|
return(-1);
|
|
|
|
return (mygroup->gr_gid);
|
|
}
|
|
|
|
/* gets a username given a uid */
|
|
void my_getpwuid(char *name, long uid)
|
|
{
|
|
struct passwd *myuser;
|
|
|
|
myuser = getpwuid(uid);
|
|
if (myuser==NULL)
|
|
sprintf(name, "%-8ld ", (long)uid);
|
|
else
|
|
strcpy(name, myuser->pw_name);
|
|
}
|
|
|
|
/* gets a groupname given a gid */
|
|
void my_getgrgid(char *group, long gid)
|
|
{
|
|
struct group *mygroup;
|
|
|
|
mygroup = getgrgid(gid);
|
|
if (mygroup==NULL)
|
|
sprintf(group, "%-8ld ", (long)gid);
|
|
else
|
|
strcpy(group, mygroup->gr_name);
|
|
}
|
|
|
|
#if defined BB_ID
|
|
/* gets a gid given a user name */
|
|
long my_getpwnamegid(char *name)
|
|
{
|
|
struct group *mygroup;
|
|
struct passwd *myuser;
|
|
|
|
myuser=getpwnam(name);
|
|
if (myuser==NULL)
|
|
error_msg_and_die( "unknown user name: %s", name);
|
|
|
|
mygroup = getgrgid(myuser->pw_gid);
|
|
if (mygroup==NULL)
|
|
error_msg_and_die( "unknown gid %ld", (long)myuser->pw_gid);
|
|
|
|
return mygroup->gr_gid;
|
|
}
|
|
#endif /* BB_ID */
|
|
#endif
|
|
/* BB_CHMOD_CHOWN_CHGRP || BB_PS || BB_LS || BB_TAR \
|
|
|| BB_ID || BB_LOGGER || BB_LOGNAME || BB_WHOAMI */
|
|
|
|
|
|
#if (defined BB_CHVT) || (defined BB_DEALLOCVT) || (defined BB_SETKEYCODES)
|
|
|
|
/* From <linux/kd.h> */
|
|
static const int KDGKBTYPE = 0x4B33; /* get keyboard type */
|
|
static const int KB_84 = 0x01;
|
|
static const int KB_101 = 0x02; /* this is what we always answer */
|
|
|
|
int is_a_console(int fd)
|
|
{
|
|
char arg;
|
|
|
|
arg = 0;
|
|
return (ioctl(fd, KDGKBTYPE, &arg) == 0
|
|
&& ((arg == KB_101) || (arg == KB_84)));
|
|
}
|
|
|
|
static int open_a_console(char *fnam)
|
|
{
|
|
int fd;
|
|
|
|
/* try read-only */
|
|
fd = open(fnam, O_RDWR);
|
|
|
|
/* if failed, try read-only */
|
|
if (fd < 0 && errno == EACCES)
|
|
fd = open(fnam, O_RDONLY);
|
|
|
|
/* if failed, try write-only */
|
|
if (fd < 0 && errno == EACCES)
|
|
fd = open(fnam, O_WRONLY);
|
|
|
|
/* if failed, fail */
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
/* if not a console, fail */
|
|
if (!is_a_console(fd)) {
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
/* success */
|
|
return fd;
|
|
}
|
|
|
|
/*
|
|
* Get an fd for use with kbd/console ioctls.
|
|
* We try several things because opening /dev/console will fail
|
|
* if someone else used X (which does a chown on /dev/console).
|
|
*
|
|
* if tty_name is non-NULL, try this one instead.
|
|
*/
|
|
|
|
int get_console_fd(char *tty_name)
|
|
{
|
|
int fd;
|
|
|
|
if (tty_name) {
|
|
if (-1 == (fd = open_a_console(tty_name)))
|
|
return -1;
|
|
else
|
|
return fd;
|
|
}
|
|
|
|
fd = open_a_console("/dev/tty");
|
|
if (fd >= 0)
|
|
return fd;
|
|
|
|
fd = open_a_console("/dev/tty0");
|
|
if (fd >= 0)
|
|
return fd;
|
|
|
|
fd = open_a_console("/dev/console");
|
|
if (fd >= 0)
|
|
return fd;
|
|
|
|
for (fd = 0; fd < 3; fd++)
|
|
if (is_a_console(fd))
|
|
return fd;
|
|
|
|
error_msg("Couldnt get a file descriptor referring to the console");
|
|
return -1; /* total failure */
|
|
}
|
|
|
|
|
|
#endif /* BB_CHVT || BB_DEALLOCVT || BB_SETKEYCODES */
|
|
|
|
|
|
#if defined BB_FIND || defined BB_INSMOD
|
|
/*
|
|
* Routine to see if a text string is matched by a wildcard pattern.
|
|
* Returns TRUE if the text is matched, or FALSE if it is not matched
|
|
* or if the pattern is invalid.
|
|
* * matches zero or more characters
|
|
* ? matches a single character
|
|
* [abc] matches 'a', 'b' or 'c'
|
|
* \c quotes character c
|
|
* Adapted from code written by Ingo Wilken, and
|
|
* then taken from sash, Copyright (c) 1999 by David I. Bell
|
|
* Permission is granted to use, distribute, or modify this source,
|
|
* provided that this copyright notice remains intact.
|
|
* Permission to distribute this code under the GPL has been granted.
|
|
*/
|
|
extern int check_wildcard_match(const char *text, const char *pattern)
|
|
{
|
|
const char *retryPat;
|
|
const char *retryText;
|
|
int ch;
|
|
int found;
|
|
int len;
|
|
|
|
retryPat = NULL;
|
|
retryText = NULL;
|
|
|
|
while (*text || *pattern) {
|
|
ch = *pattern++;
|
|
|
|
switch (ch) {
|
|
case '*':
|
|
retryPat = pattern;
|
|
retryText = text;
|
|
break;
|
|
|
|
case '[':
|
|
found = FALSE;
|
|
|
|
while ((ch = *pattern++) != ']') {
|
|
if (ch == '\\')
|
|
ch = *pattern++;
|
|
|
|
if (ch == '\0')
|
|
return FALSE;
|
|
|
|
if (*text == ch)
|
|
found = TRUE;
|
|
}
|
|
len=strlen(text);
|
|
if (found == FALSE && len!=0) {
|
|
return FALSE;
|
|
}
|
|
if (found == TRUE) {
|
|
if (strlen(pattern)==0 && len==1) {
|
|
return TRUE;
|
|
}
|
|
if (len!=0) {
|
|
text++;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* fall into next case */
|
|
|
|
case '?':
|
|
if (*text++ == '\0')
|
|
return FALSE;
|
|
|
|
break;
|
|
|
|
case '\\':
|
|
ch = *pattern++;
|
|
|
|
if (ch == '\0')
|
|
return FALSE;
|
|
|
|
/* fall into next case */
|
|
|
|
default:
|
|
if (*text == ch) {
|
|
if (*text)
|
|
text++;
|
|
break;
|
|
}
|
|
|
|
if (*text) {
|
|
pattern = retryPat;
|
|
text = ++retryText;
|
|
break;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
if (pattern == NULL)
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
#endif /* BB_FIND || BB_INSMOD */
|
|
|
|
|
|
|
|
|
|
#if defined BB_DF || defined BB_MTAB
|
|
#include <mntent.h>
|
|
/*
|
|
* Given a block device, find the mount table entry if that block device
|
|
* is mounted.
|
|
*
|
|
* Given any other file (or directory), find the mount table entry for its
|
|
* filesystem.
|
|
*/
|
|
extern struct mntent *find_mount_point(const char *name, const char *table)
|
|
{
|
|
struct stat s;
|
|
dev_t mountDevice;
|
|
FILE *mountTable;
|
|
struct mntent *mountEntry;
|
|
|
|
if (stat(name, &s) != 0)
|
|
return 0;
|
|
|
|
if ((s.st_mode & S_IFMT) == S_IFBLK)
|
|
mountDevice = s.st_rdev;
|
|
else
|
|
mountDevice = s.st_dev;
|
|
|
|
|
|
if ((mountTable = setmntent(table, "r")) == 0)
|
|
return 0;
|
|
|
|
while ((mountEntry = getmntent(mountTable)) != 0) {
|
|
if (strcmp(name, mountEntry->mnt_dir) == 0
|
|
|| strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */
|
|
break;
|
|
if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */
|
|
break;
|
|
if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */
|
|
break;
|
|
}
|
|
endmntent(mountTable);
|
|
return mountEntry;
|
|
}
|
|
#endif /* BB_DF || BB_MTAB */
|
|
|
|
#if defined BB_INIT || defined BB_SYSLOGD
|
|
/* try to open up the specified device */
|
|
extern int device_open(char *device, int mode)
|
|
{
|
|
int m, f, fd = -1;
|
|
|
|
m = mode | O_NONBLOCK;
|
|
|
|
/* Retry up to 5 times */
|
|
for (f = 0; f < 5; f++)
|
|
if ((fd = open(device, m, 0600)) >= 0)
|
|
break;
|
|
if (fd < 0)
|
|
return fd;
|
|
/* Reset original flags. */
|
|
if (m != mode)
|
|
fcntl(fd, F_SETFL, mode);
|
|
return fd;
|
|
}
|
|
#endif /* BB_INIT BB_SYSLOGD */
|
|
|
|
|
|
#if defined BB_KILLALL || ( defined BB_FEATURE_LINUXRC && ( defined BB_HALT || defined BB_REBOOT || defined BB_POWEROFF ))
|
|
#ifdef BB_FEATURE_USE_DEVPS_PATCH
|
|
#include <linux/devps.h> /* For Erik's nifty devps device driver */
|
|
#endif
|
|
|
|
#if defined BB_FEATURE_USE_DEVPS_PATCH
|
|
/* find_pid_by_name()
|
|
*
|
|
* This finds the pid of the specified process,
|
|
* by using the /dev/ps device driver.
|
|
*
|
|
* Returns a list of all matching PIDs
|
|
*/
|
|
extern pid_t* find_pid_by_name( char* pidName)
|
|
{
|
|
int fd, i, j;
|
|
char device[] = "/dev/ps";
|
|
pid_t num_pids;
|
|
pid_t* pid_array = NULL;
|
|
pid_t* pidList=NULL;
|
|
|
|
/* open device */
|
|
fd = open(device, O_RDONLY);
|
|
if (fd < 0)
|
|
perror_msg_and_die("open failed for `%s'", device);
|
|
|
|
/* Find out how many processes there are */
|
|
if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
|
|
perror_msg_and_die("\nDEVPS_GET_PID_LIST");
|
|
|
|
/* Allocate some memory -- grab a few extras just in case
|
|
* some new processes start up while we wait. The kernel will
|
|
* just ignore any extras if we give it too many, and will trunc.
|
|
* the list if we give it too few. */
|
|
pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t));
|
|
pid_array[0] = num_pids+10;
|
|
|
|
/* Now grab the pid list */
|
|
if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
|
|
perror_msg_and_die("\nDEVPS_GET_PID_LIST");
|
|
|
|
/* Now search for a match */
|
|
for (i=1, j=0; i<pid_array[0] ; i++) {
|
|
char* p;
|
|
struct pid_info info;
|
|
|
|
info.pid = pid_array[i];
|
|
if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
|
|
perror_msg_and_die("\nDEVPS_GET_PID_INFO");
|
|
|
|
/* Make sure we only match on the process name */
|
|
p=info.command_line+1;
|
|
while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) {
|
|
(p)++;
|
|
}
|
|
if (isspace(*(p)))
|
|
*p='\0';
|
|
|
|
if ((strstr(info.command_line, pidName) != NULL)
|
|
&& (strlen(pidName) == strlen(info.command_line))) {
|
|
pidList=xrealloc( pidList, sizeof(pid_t) * (j+2));
|
|
pidList[j++]=info.pid;
|
|
}
|
|
}
|
|
if (pidList)
|
|
pidList[j]=0;
|
|
|
|
/* Free memory */
|
|
free( pid_array);
|
|
|
|
/* close device */
|
|
if (close (fd) != 0)
|
|
perror_msg_and_die("close failed for `%s'", device);
|
|
|
|
return pidList;
|
|
}
|
|
#else /* BB_FEATURE_USE_DEVPS_PATCH */
|
|
|
|
/* find_pid_by_name()
|
|
*
|
|
* This finds the pid of the specified process.
|
|
* Currently, it's implemented by rummaging through
|
|
* the proc filesystem.
|
|
*
|
|
* Returns a list of all matching PIDs
|
|
*/
|
|
extern pid_t* find_pid_by_name( char* pidName)
|
|
{
|
|
DIR *dir;
|
|
struct dirent *next;
|
|
pid_t* pidList=NULL;
|
|
int i=0;
|
|
|
|
dir = opendir("/proc");
|
|
if (!dir)
|
|
perror_msg_and_die("Cannot open /proc");
|
|
|
|
while ((next = readdir(dir)) != NULL) {
|
|
FILE *status;
|
|
char filename[256];
|
|
char buffer[256];
|
|
|
|
/* If it isn't a number, we don't want it */
|
|
if (!isdigit(*next->d_name))
|
|
continue;
|
|
|
|
sprintf(filename, "/proc/%s/cmdline", next->d_name);
|
|
status = fopen(filename, "r");
|
|
if (!status) {
|
|
continue;
|
|
}
|
|
fgets(buffer, 256, status);
|
|
fclose(status);
|
|
|
|
if (strstr(get_last_path_component(buffer), pidName) != NULL) {
|
|
pidList=xrealloc( pidList, sizeof(pid_t) * (i+2));
|
|
pidList[i++]=strtol(next->d_name, NULL, 0);
|
|
}
|
|
}
|
|
|
|
if (pidList)
|
|
pidList[i]=0;
|
|
return pidList;
|
|
}
|
|
#endif /* BB_FEATURE_USE_DEVPS_PATCH */
|
|
#endif /* BB_KILLALL || ( BB_FEATURE_LINUXRC && ( BB_HALT || BB_REBOOT || BB_POWEROFF )) */
|
|
|
|
#ifndef DMALLOC
|
|
/* this should really be farmed out to libbusybox.a */
|
|
extern void *xmalloc(size_t size)
|
|
{
|
|
void *ptr = malloc(size);
|
|
|
|
if (!ptr)
|
|
error_msg_and_die(memory_exhausted);
|
|
return ptr;
|
|
}
|
|
|
|
extern void *xrealloc(void *old, size_t size)
|
|
{
|
|
void *ptr = realloc(old, size);
|
|
if (!ptr)
|
|
error_msg_and_die(memory_exhausted);
|
|
return ptr;
|
|
}
|
|
|
|
extern void *xcalloc(size_t nmemb, size_t size)
|
|
{
|
|
void *ptr = calloc(nmemb, size);
|
|
if (!ptr)
|
|
error_msg_and_die(memory_exhausted);
|
|
return ptr;
|
|
}
|
|
#endif
|
|
|
|
#if defined BB_NFSMOUNT || defined BB_LS || defined BB_SH || \
|
|
defined BB_WGET || defined BB_DPKG_DEB || defined BB_TAR || \
|
|
defined BB_LN
|
|
# ifndef DMALLOC
|
|
extern char * xstrdup (const char *s) {
|
|
char *t;
|
|
|
|
if (s == NULL)
|
|
return NULL;
|
|
|
|
t = strdup (s);
|
|
|
|
if (t == NULL)
|
|
error_msg_and_die(memory_exhausted);
|
|
|
|
return t;
|
|
}
|
|
# endif
|
|
#endif
|
|
|
|
#if defined BB_NFSMOUNT
|
|
extern char * xstrndup (const char *s, int n) {
|
|
char *t;
|
|
|
|
if (s == NULL)
|
|
error_msg_and_die("xstrndup bug");
|
|
|
|
t = xmalloc(++n);
|
|
|
|
return safe_strncpy(t,s,n);
|
|
}
|
|
#endif
|
|
|
|
#if defined BB_IFCONFIG || defined BB_ROUTE || defined BB_NFSMOUNT || \
|
|
defined BB_FEATURE_MOUNT_LOOP
|
|
/* Like strncpy but make sure the resulting string is always 0 terminated. */
|
|
extern char * safe_strncpy(char *dst, const char *src, size_t size)
|
|
{
|
|
dst[size-1] = '\0';
|
|
return strncpy(dst, src, size-1);
|
|
}
|
|
#endif
|
|
|
|
#if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT)
|
|
extern int vdprintf(int d, const char *format, va_list ap)
|
|
{
|
|
char buf[BUF_SIZE];
|
|
int len;
|
|
|
|
len = vsprintf(buf, format, ap);
|
|
return write(d, buf, len);
|
|
}
|
|
#endif /* BB_SYSLOGD */
|
|
|
|
|
|
#if defined BB_FEATURE_MOUNT_LOOP
|
|
#include <fcntl.h>
|
|
#include "loop.h" /* Pull in loop device support */
|
|
|
|
extern int del_loop(const char *device)
|
|
{
|
|
int fd;
|
|
|
|
if ((fd = open(device, O_RDONLY)) < 0) {
|
|
perror_msg("%s", device);
|
|
return (FALSE);
|
|
}
|
|
if (ioctl(fd, LOOP_CLR_FD, 0) < 0) {
|
|
perror_msg("ioctl: LOOP_CLR_FD");
|
|
return (FALSE);
|
|
}
|
|
close(fd);
|
|
return (TRUE);
|
|
}
|
|
|
|
extern int set_loop(const char *device, const char *file, int offset,
|
|
int *loopro)
|
|
{
|
|
struct loop_info loopinfo;
|
|
int fd, ffd, mode;
|
|
|
|
mode = *loopro ? O_RDONLY : O_RDWR;
|
|
if ((ffd = open(file, mode)) < 0 && !*loopro
|
|
&& (errno != EROFS || (ffd = open(file, mode = O_RDONLY)) < 0)) {
|
|
perror_msg("%s", file);
|
|
return 1;
|
|
}
|
|
if ((fd = open(device, mode)) < 0) {
|
|
close(ffd);
|
|
perror_msg("%s", device);
|
|
return 1;
|
|
}
|
|
*loopro = (mode == O_RDONLY);
|
|
|
|
memset(&loopinfo, 0, sizeof(loopinfo));
|
|
safe_strncpy(loopinfo.lo_name, file, LO_NAME_SIZE);
|
|
|
|
loopinfo.lo_offset = offset;
|
|
|
|
loopinfo.lo_encrypt_key_size = 0;
|
|
if (ioctl(fd, LOOP_SET_FD, ffd) < 0) {
|
|
perror_msg("ioctl: LOOP_SET_FD");
|
|
close(fd);
|
|
close(ffd);
|
|
return 1;
|
|
}
|
|
if (ioctl(fd, LOOP_SET_STATUS, &loopinfo) < 0) {
|
|
(void) ioctl(fd, LOOP_CLR_FD, 0);
|
|
perror_msg("ioctl: LOOP_SET_STATUS");
|
|
close(fd);
|
|
close(ffd);
|
|
return 1;
|
|
}
|
|
close(fd);
|
|
close(ffd);
|
|
return 0;
|
|
}
|
|
|
|
extern char *find_unused_loop_device(void)
|
|
{
|
|
char dev[20];
|
|
int i, fd;
|
|
struct stat statbuf;
|
|
struct loop_info loopinfo;
|
|
|
|
for (i = 0; i <= 7; i++) {
|
|
sprintf(dev, "/dev/loop%d", i);
|
|
if (stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
|
|
if ((fd = open(dev, O_RDONLY)) >= 0) {
|
|
if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) == -1) {
|
|
if (errno == ENXIO) { /* probably free */
|
|
close(fd);
|
|
return strdup(dev);
|
|
}
|
|
}
|
|
close(fd);
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
#endif /* BB_FEATURE_MOUNT_LOOP */
|
|
|
|
#if defined BB_MOUNT || defined BB_DF || ( defined BB_UMOUNT && ! defined BB_MTAB)
|
|
extern int find_real_root_device_name(char* name)
|
|
{
|
|
DIR *dir;
|
|
struct dirent *entry;
|
|
struct stat statBuf, rootStat;
|
|
char fileName[BUFSIZ];
|
|
|
|
if (stat("/", &rootStat) != 0) {
|
|
error_msg("could not stat '/'");
|
|
return( FALSE);
|
|
}
|
|
|
|
dir = opendir("/dev");
|
|
if (!dir) {
|
|
error_msg("could not open '/dev'");
|
|
return( FALSE);
|
|
}
|
|
|
|
while((entry = readdir(dir)) != NULL) {
|
|
|
|
/* Must skip ".." since that is "/", and so we
|
|
* would get a false positive on ".." */
|
|
if (strcmp(entry->d_name, "..") == 0)
|
|
continue;
|
|
|
|
snprintf( fileName, strlen(name)+1, "/dev/%s", entry->d_name);
|
|
|
|
if (stat(fileName, &statBuf) != 0)
|
|
continue;
|
|
/* Some char devices have the same dev_t as block
|
|
* devices, so make sure this is a block device */
|
|
if (! S_ISBLK(statBuf.st_mode))
|
|
continue;
|
|
if (statBuf.st_rdev == rootStat.st_rdev) {
|
|
strcpy(name, fileName);
|
|
return ( TRUE);
|
|
}
|
|
}
|
|
|
|
return( FALSE);
|
|
}
|
|
#endif
|
|
|
|
|
|
/* get_line_from_file() - This function reads an entire line from a text file
|
|
* up to a newline. It returns a malloc'ed char * which must be stored and
|
|
* free'ed by the caller. */
|
|
extern char *get_line_from_file(FILE *file)
|
|
{
|
|
static const int GROWBY = 80; /* how large we will grow strings by */
|
|
|
|
int ch;
|
|
int idx = 0;
|
|
char *linebuf = NULL;
|
|
int linebufsz = 0;
|
|
|
|
while (1) {
|
|
ch = fgetc(file);
|
|
if (ch == EOF)
|
|
break;
|
|
/* grow the line buffer as necessary */
|
|
while (idx > linebufsz-2)
|
|
linebuf = xrealloc(linebuf, linebufsz += GROWBY);
|
|
linebuf[idx++] = (char)ch;
|
|
if ((char)ch == '\n')
|
|
break;
|
|
}
|
|
|
|
if (idx == 0)
|
|
return NULL;
|
|
|
|
linebuf[idx] = 0;
|
|
return linebuf;
|
|
}
|
|
|
|
#if defined BB_CAT
|
|
extern void print_file(FILE *file)
|
|
{
|
|
int c;
|
|
|
|
while ((c = getc(file)) != EOF)
|
|
putc(c, stdout);
|
|
fclose(file);
|
|
fflush(stdout);
|
|
}
|
|
|
|
extern int print_file_by_name(char *filename)
|
|
{
|
|
FILE *file;
|
|
if ((file = wfopen(filename, "r")) == NULL)
|
|
return FALSE;
|
|
print_file(file);
|
|
return TRUE;
|
|
}
|
|
#endif /* BB_CAT */
|
|
|
|
#if defined BB_ECHO || defined BB_SH || defined BB_TR
|
|
char process_escape_sequence(char **ptr)
|
|
{
|
|
static const char charmap[] = {
|
|
'a', 'b', 'f', 'n', 'r', 't', 'v', '\\', 0,
|
|
'\a', '\b', '\f', '\n', '\r', '\t', '\v', '\\', '\\' };
|
|
|
|
const char *p;
|
|
char *q;
|
|
int num_digits;
|
|
unsigned int n;
|
|
|
|
n = 0;
|
|
q = *ptr;
|
|
|
|
for ( num_digits = 0 ; num_digits < 3 ; ++num_digits) {
|
|
if ((*q < '0') || (*q > '7')) { /* not a digit? */
|
|
break;
|
|
}
|
|
n = n * 8 + (*q++ - '0');
|
|
}
|
|
|
|
if (num_digits == 0) { /* mnemonic escape sequence? */
|
|
for (p=charmap ; *p ; p++) {
|
|
if (*p == *q) {
|
|
q++;
|
|
break;
|
|
}
|
|
}
|
|
n = *(p+(sizeof(charmap)/2));
|
|
}
|
|
|
|
/* doesn't hurt to fall through to here from mnemonic case */
|
|
if (n > UCHAR_MAX) { /* is octal code too big for a char? */
|
|
n /= 8; /* adjust value and */
|
|
--q; /* back up one char */
|
|
}
|
|
|
|
*ptr = q;
|
|
return (char) n;
|
|
}
|
|
#endif
|
|
|
|
#if defined BB_BASENAME || defined BB_LN || defined BB_SH || defined BB_INIT || \
|
|
! defined BB_FEATURE_USE_DEVPS_PATCH || defined BB_WGET
|
|
char *get_last_path_component(char *path)
|
|
{
|
|
char *s=path+strlen(path)-1;
|
|
|
|
/* strip trailing slashes */
|
|
while (s != path && *s == '/') {
|
|
*s-- = '\0';
|
|
}
|
|
|
|
/* find last component */
|
|
s = strrchr(path, '/');
|
|
if (s == NULL || s[1] == '\0')
|
|
return path;
|
|
else
|
|
return s+1;
|
|
}
|
|
#endif
|
|
|
|
#if defined BB_GREP || defined BB_SED
|
|
#include <regex.h>
|
|
void xregcomp(regex_t *preg, const char *regex, int cflags)
|
|
{
|
|
int ret;
|
|
if ((ret = regcomp(preg, regex, cflags)) != 0) {
|
|
int errmsgsz = regerror(ret, preg, NULL, 0);
|
|
char *errmsg = xmalloc(errmsgsz);
|
|
regerror(ret, preg, errmsg, errmsgsz);
|
|
error_msg_and_die("xregcomp: %s", errmsg);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if defined BB_CAT || defined BB_HEAD || defined BB_WC
|
|
FILE *wfopen(const char *path, const char *mode)
|
|
{
|
|
FILE *fp;
|
|
if ((fp = fopen(path, mode)) == NULL) {
|
|
perror_msg("%s", path);
|
|
errno = 0;
|
|
}
|
|
return fp;
|
|
}
|
|
#endif
|
|
|
|
#if defined BB_HOSTNAME || defined BB_LOADACM || defined BB_MORE \
|
|
|| defined BB_SED || defined BB_SH || defined BB_TAR || defined BB_UNIQ \
|
|
|| defined BB_WC || defined BB_CMP || defined BB_SORT || defined BB_WGET \
|
|
|| defined BB_MOUNT || defined BB_ROUTE
|
|
FILE *xfopen(const char *path, const char *mode)
|
|
{
|
|
FILE *fp;
|
|
if ((fp = fopen(path, mode)) == NULL)
|
|
perror_msg_and_die("%s", path);
|
|
return fp;
|
|
}
|
|
#endif
|
|
|
|
static int applet_name_compare(const void *x, const void *y)
|
|
{
|
|
const char *name = x;
|
|
const struct BB_applet *applet = y;
|
|
|
|
return strcmp(name, applet->name);
|
|
}
|
|
|
|
extern size_t NUM_APPLETS;
|
|
|
|
struct BB_applet *find_applet_by_name(const char *name)
|
|
{
|
|
return bsearch(name, applets, NUM_APPLETS, sizeof(struct BB_applet),
|
|
applet_name_compare);
|
|
}
|
|
|
|
void run_applet_by_name(const char *name, int argc, char **argv)
|
|
{
|
|
/* Do a binary search to find the applet entry given the name. */
|
|
if ((applet_using = find_applet_by_name(name)) != NULL) {
|
|
applet_name = applet_using->name;
|
|
if (argv[1] && strcmp(argv[1], "--help") == 0)
|
|
show_usage();
|
|
exit((*(applet_using->main)) (argc, argv));
|
|
}
|
|
}
|
|
|
|
#if defined BB_DD || defined BB_TAIL || defined BB_STTY
|
|
unsigned long parse_number(const char *numstr,
|
|
const struct suffix_mult *suffixes)
|
|
{
|
|
const struct suffix_mult *sm;
|
|
unsigned long int ret;
|
|
int len;
|
|
char *end;
|
|
|
|
ret = strtoul(numstr, &end, 10);
|
|
if (numstr == end)
|
|
error_msg_and_die("invalid number `%s'", numstr);
|
|
while (end[0] != '\0') {
|
|
sm = suffixes;
|
|
while ( sm != 0 ) {
|
|
if(sm->suffix) {
|
|
len = strlen(sm->suffix);
|
|
if (strncmp(sm->suffix, end, len) == 0) {
|
|
ret *= sm->mult;
|
|
end += len;
|
|
break;
|
|
}
|
|
sm++;
|
|
|
|
} else
|
|
sm = 0;
|
|
}
|
|
if (sm == 0)
|
|
error_msg_and_die("invalid number `%s'", numstr);
|
|
}
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#if defined BB_DD || defined BB_NC || defined BB_TAIL
|
|
ssize_t safe_read(int fd, void *buf, size_t count)
|
|
{
|
|
ssize_t n;
|
|
|
|
do {
|
|
n = read(fd, buf, count);
|
|
} while (n < 0 && errno == EINTR);
|
|
|
|
return n;
|
|
}
|
|
#endif
|
|
|
|
#ifdef BB_FEATURE_HUMAN_READABLE
|
|
const char *format(unsigned long val, unsigned long hr)
|
|
{
|
|
static const char strings[] = { '0', 0, 'k', 0, 'M', 0, 'G', 0 };
|
|
static const char fmt[] = "%lu";
|
|
static const char fmt_u[] = "%lu.%lu%s";
|
|
|
|
static char str[10];
|
|
|
|
unsigned long frac __attribute__ ((unused)); /* 'may be uninitialized' warning is ok */
|
|
const char *u;
|
|
const char *f;
|
|
|
|
#if 1
|
|
if(val == 0) { /* This may be omitted to reduce size */
|
|
return strings; /* at the cost of speed. */
|
|
}
|
|
#endif
|
|
|
|
u = strings;
|
|
f = fmt;
|
|
if (hr) {
|
|
val /= hr;
|
|
} else {
|
|
while ((val >= KILOBYTE) && (*u != 'G')) {
|
|
f = fmt_u;
|
|
u += 2;
|
|
frac = (((val % KILOBYTE) * 10) + (KILOBYTE/2)) / KILOBYTE;
|
|
val /= KILOBYTE;
|
|
if (frac >= 10) { /* We need to round up here. */
|
|
++val;
|
|
frac = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* If f==fmt then 'frac' and 'u' are ignored and need not be set. */
|
|
snprintf(str, sizeof(str), f, val, frac, u);
|
|
|
|
return str;
|
|
}
|
|
#endif
|
|
|
|
#if defined(BB_GREP) || defined(BB_HOSTNAME) || defined(BB_SED) || defined(BB_TAR) || defined(BB_WGET) || defined(BB_XARGS)
|
|
void chomp(char *s)
|
|
{
|
|
size_t len = strlen(s);
|
|
|
|
if (len == 0)
|
|
return;
|
|
|
|
if (s[len-1] == '\n')
|
|
s[len-1] = '\0';
|
|
}
|
|
#endif
|
|
|
|
/* END CODE */
|
|
/*
|
|
Local Variables:
|
|
c-file-style: "linux"
|
|
c-basic-offset: 4
|
|
tab-width: 4
|
|
End:
|
|
*/
|