mirror of
https://github.com/sheumann/hush.git
synced 2024-08-21 11:28:57 +00:00
Signed-off-by: Dan Fandrich <dan@coneharvesters.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
401 lines
11 KiB
C
401 lines
11 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
Copyright 2006, Bernhard Reutner-Fischer
|
|
|
|
Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
|
*/
|
|
#ifndef BB_PLATFORM_H
|
|
#define BB_PLATFORM_H 1
|
|
|
|
/* Assume all these functions exist by default. Platforms where it is not
|
|
* true will #undef them below.
|
|
*/
|
|
#define HAVE_FDPRINTF 1
|
|
#define HAVE_MEMRCHR 1
|
|
#define HAVE_MKDTEMP 1
|
|
#define HAVE_SETBIT 1
|
|
#define HAVE_STRCASESTR 1
|
|
#define HAVE_STRCHRNUL 1
|
|
#define HAVE_STRSIGNAL 1
|
|
#define HAVE_VASPRINTF 1
|
|
|
|
/* Convenience macros to test the version of gcc. */
|
|
#undef __GNUC_PREREQ
|
|
#if defined __GNUC__ && defined __GNUC_MINOR__
|
|
# define __GNUC_PREREQ(maj, min) \
|
|
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
|
|
#else
|
|
# define __GNUC_PREREQ(maj, min) 0
|
|
#endif
|
|
|
|
/* __restrict is known in EGCS 1.2 and above. */
|
|
#if !__GNUC_PREREQ(2,92)
|
|
# ifndef __restrict
|
|
# define __restrict
|
|
# endif
|
|
#endif
|
|
|
|
/* Define macros for some gcc attributes. This permits us to use the
|
|
macros freely, and know that they will come into play for the
|
|
version of gcc in which they are supported. */
|
|
|
|
#if !__GNUC_PREREQ(2,7)
|
|
# ifndef __attribute__
|
|
# define __attribute__(x)
|
|
# endif
|
|
#endif
|
|
|
|
#undef inline
|
|
#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L
|
|
/* it's a keyword */
|
|
#elif __GNUC_PREREQ(2,7)
|
|
# define inline __inline__
|
|
#else
|
|
# define inline
|
|
#endif
|
|
|
|
#ifndef __const
|
|
# define __const const
|
|
#endif
|
|
|
|
#define UNUSED_PARAM __attribute__ ((__unused__))
|
|
#define NORETURN __attribute__ ((__noreturn__))
|
|
#define PACKED __attribute__ ((__packed__))
|
|
#define ALIGNED(m) __attribute__ ((__aligned__(m)))
|
|
|
|
/* __NO_INLINE__: some gcc's do not honor inlining! :( */
|
|
#if __GNUC_PREREQ(3,0) && !defined(__NO_INLINE__)
|
|
# define ALWAYS_INLINE __attribute__ ((always_inline)) inline
|
|
/* I've seen a toolchain where I needed __noinline__ instead of noinline */
|
|
# define NOINLINE __attribute__((__noinline__))
|
|
# if !ENABLE_WERROR
|
|
# define DEPRECATED __attribute__ ((__deprecated__))
|
|
# define UNUSED_PARAM_RESULT __attribute__ ((warn_unused_result))
|
|
# else
|
|
# define DEPRECATED
|
|
# define UNUSED_PARAM_RESULT
|
|
# endif
|
|
#else
|
|
# define ALWAYS_INLINE inline
|
|
# define NOINLINE
|
|
# define DEPRECATED
|
|
# define UNUSED_PARAM_RESULT
|
|
#endif
|
|
|
|
/* -fwhole-program makes all symbols local. The attribute externally_visible
|
|
forces a symbol global. */
|
|
#if __GNUC_PREREQ(4,1)
|
|
# define EXTERNALLY_VISIBLE __attribute__(( visibility("default") ))
|
|
//__attribute__ ((__externally_visible__))
|
|
#else
|
|
# define EXTERNALLY_VISIBLE
|
|
#endif
|
|
|
|
/* We use __extension__ in some places to suppress -pedantic warnings
|
|
about GCC extensions. This feature didn't work properly before
|
|
gcc 2.8. */
|
|
#if !__GNUC_PREREQ(2,8)
|
|
# ifndef __extension__
|
|
# define __extension__
|
|
# endif
|
|
#endif
|
|
|
|
/* gcc-2.95 had no va_copy but only __va_copy. */
|
|
#if !__GNUC_PREREQ(3,0)
|
|
# include <stdarg.h>
|
|
# if !defined va_copy && defined __va_copy
|
|
# define va_copy(d,s) __va_copy((d),(s))
|
|
# endif
|
|
#endif
|
|
|
|
/* FAST_FUNC is a qualifier which (possibly) makes function call faster
|
|
* and/or smaller by using modified ABI. It is usually only needed
|
|
* on non-static, busybox internal functions. Recent versions of gcc
|
|
* optimize statics automatically. FAST_FUNC on static is required
|
|
* only if you need to match a function pointer's type */
|
|
#if __GNUC_PREREQ(3,0) && defined(i386) /* || defined(__x86_64__)? */
|
|
/* stdcall makes callee to pop arguments from stack, not caller */
|
|
# define FAST_FUNC __attribute__((regparm(3),stdcall))
|
|
/* #elif ... - add your favorite arch today! */
|
|
#else
|
|
# define FAST_FUNC
|
|
#endif
|
|
|
|
/* Make all declarations hidden (-fvisibility flag only affects definitions) */
|
|
/* (don't include system headers after this until corresponding pop!) */
|
|
#if __GNUC_PREREQ(4,1)
|
|
# define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN _Pragma("GCC visibility push(hidden)")
|
|
# define POP_SAVED_FUNCTION_VISIBILITY _Pragma("GCC visibility pop")
|
|
#else
|
|
# define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
|
|
# define POP_SAVED_FUNCTION_VISIBILITY
|
|
#endif
|
|
|
|
/* ---- Endian Detection ------------------------------------ */
|
|
|
|
#if defined(__digital__) && defined(__unix__)
|
|
# include <sex.h>
|
|
# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
|
|
# define __BYTE_ORDER BYTE_ORDER
|
|
#elif defined __FreeBSD__
|
|
# include <sys/resource.h> /* rlimit */
|
|
# include <machine/endian.h>
|
|
# define bswap_64 __bswap64
|
|
# define bswap_32 __bswap32
|
|
# define bswap_16 __bswap16
|
|
# define __BIG_ENDIAN__ (_BYTE_ORDER == _BIG_ENDIAN)
|
|
#elif !defined __APPLE__
|
|
# include <byteswap.h>
|
|
# include <endian.h>
|
|
#endif
|
|
|
|
#if defined(__BIG_ENDIAN__) && __BIG_ENDIAN__
|
|
# define BB_BIG_ENDIAN 1
|
|
# define BB_LITTLE_ENDIAN 0
|
|
#elif __BYTE_ORDER == __BIG_ENDIAN
|
|
# define BB_BIG_ENDIAN 1
|
|
# define BB_LITTLE_ENDIAN 0
|
|
#elif __BYTE_ORDER == __LITTLE_ENDIAN
|
|
# define BB_BIG_ENDIAN 0
|
|
# define BB_LITTLE_ENDIAN 1
|
|
#else
|
|
# error "Can't determine endianness"
|
|
#endif
|
|
|
|
/* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */
|
|
#if BB_BIG_ENDIAN
|
|
# define SWAP_BE16(x) (x)
|
|
# define SWAP_BE32(x) (x)
|
|
# define SWAP_BE64(x) (x)
|
|
# define SWAP_LE16(x) bswap_16(x)
|
|
# define SWAP_LE32(x) bswap_32(x)
|
|
# define SWAP_LE64(x) bswap_64(x)
|
|
#else
|
|
# define SWAP_BE16(x) bswap_16(x)
|
|
# define SWAP_BE32(x) bswap_32(x)
|
|
# define SWAP_BE64(x) bswap_64(x)
|
|
# define SWAP_LE16(x) (x)
|
|
# define SWAP_LE32(x) (x)
|
|
# define SWAP_LE64(x) (x)
|
|
#endif
|
|
|
|
/* ---- Unaligned access ------------------------------------ */
|
|
|
|
/* NB: unaligned parameter should be a pointer, aligned one -
|
|
* a lvalue. This makes it more likely to not swap them by mistake
|
|
*/
|
|
#if defined(i386) || defined(__x86_64__)
|
|
# define move_from_unaligned16(v, u16p) ((v) = *(uint16_t*)(u16p))
|
|
# define move_from_unaligned32(v, u32p) ((v) = *(uint32_t*)(u32p))
|
|
# define move_to_unaligned32(u32p, v) (*(uint32_t*)(u32p) = (v))
|
|
/* #elif ... - add your favorite arch today! */
|
|
#else
|
|
/* performs reasonably well (gcc usually inlines memcpy here) */
|
|
# define move_from_unaligned16(v, u16p) (memcpy(&(v), (u16p), 2))
|
|
# define move_from_unaligned32(v, u32p) (memcpy(&(v), (u32p), 4))
|
|
# define move_to_unaligned32(u32p, v) do { \
|
|
uint32_t __t = (v); \
|
|
memcpy((u32p), &__t, 4); \
|
|
} while (0)
|
|
#endif
|
|
|
|
/* ---- Networking ------------------------------------------ */
|
|
|
|
#ifndef __APPLE__
|
|
# include <arpa/inet.h>
|
|
# if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED)
|
|
typedef int socklen_t;
|
|
# endif
|
|
#else
|
|
# include <netinet/in.h>
|
|
#endif
|
|
|
|
/* ---- Compiler dependent settings ------------------------- */
|
|
|
|
#if (defined __digital__ && defined __unix__) \
|
|
|| defined __APPLE__ || defined __FreeBSD__
|
|
# undef HAVE_MNTENT_H
|
|
# undef HAVE_SYS_STATFS_H
|
|
#else
|
|
# define HAVE_MNTENT_H 1
|
|
# define HAVE_SYS_STATFS_H 1
|
|
#endif
|
|
|
|
/*----- Kernel versioning ------------------------------------*/
|
|
|
|
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
|
|
|
|
/* ---- Miscellaneous --------------------------------------- */
|
|
|
|
#if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
|
|
!defined(__dietlibc__) && \
|
|
!defined(_NEWLIB_VERSION) && \
|
|
!(defined __digital__ && defined __unix__)
|
|
# error "Sorry, this libc version is not supported :("
|
|
#endif
|
|
|
|
/* Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. */
|
|
|
|
#if defined __GLIBC__ || defined __UCLIBC__ \
|
|
|| defined __dietlibc__ || defined _NEWLIB_VERSION
|
|
# include <features.h>
|
|
# define HAVE_FEATURES_H
|
|
# include <stdint.h>
|
|
# define HAVE_STDINT_H
|
|
#elif !defined __APPLE__
|
|
/* Largest integral types. */
|
|
# if BB_BIG_ENDIAN
|
|
/* Looks BROKEN! */
|
|
typedef long intmax_t;
|
|
typedef unsigned long uintmax_t;
|
|
# else
|
|
__extension__
|
|
typedef long long intmax_t;
|
|
__extension__
|
|
typedef unsigned long long uintmax_t;
|
|
# endif
|
|
#endif
|
|
|
|
/* Size-saving "small" ints (arch-dependent) */
|
|
#if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__)
|
|
/* add other arches which benefit from this... */
|
|
typedef signed char smallint;
|
|
typedef unsigned char smalluint;
|
|
#else
|
|
/* for arches where byte accesses generate larger code: */
|
|
typedef int smallint;
|
|
typedef unsigned smalluint;
|
|
#endif
|
|
|
|
/* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */
|
|
#if (defined __digital__ && defined __unix__)
|
|
/* old system without (proper) C99 support */
|
|
# define bool smalluint
|
|
#else
|
|
/* modern system, so use it */
|
|
# include <stdbool.h>
|
|
#endif
|
|
|
|
/* Try to defeat gcc's alignment of "char message[]"-like data */
|
|
#if 1 /* if needed: !defined(arch1) && !defined(arch2) */
|
|
# define ALIGN1 __attribute__((aligned(1)))
|
|
# define ALIGN2 __attribute__((aligned(2)))
|
|
#else
|
|
/* Arches which MUST have 2 or 4 byte alignment for everything are here */
|
|
# define ALIGN1
|
|
# define ALIGN2
|
|
#endif
|
|
|
|
|
|
/* uclibc does not implement daemon() for no-mmu systems.
|
|
* For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
|
|
* For earlier versions there is no reliable way to check if we are building
|
|
* for a mmu-less system.
|
|
*/
|
|
#if ENABLE_NOMMU || \
|
|
(defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
|
|
__UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__)
|
|
# define BB_MMU 0
|
|
# define USE_FOR_NOMMU(...) __VA_ARGS__
|
|
# define USE_FOR_MMU(...)
|
|
#else
|
|
# define BB_MMU 1
|
|
# define USE_FOR_NOMMU(...)
|
|
# define USE_FOR_MMU(...) __VA_ARGS__
|
|
#endif
|
|
|
|
/* Don't use lchown with glibc older than 2.1.x */
|
|
#if defined(__GLIBC__) && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1
|
|
# define lchown chown
|
|
#endif
|
|
|
|
#if defined(__digital__) && defined(__unix__)
|
|
|
|
# include <standards.h>
|
|
# include <inttypes.h>
|
|
# define PRIu32 "u"
|
|
/* use legacy setpgrp(pid_t,pid_t) for now. move to platform.c */
|
|
# define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me,__me); } while (0)
|
|
# if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
|
|
# define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
|
|
# endif
|
|
# if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
|
|
# define ADJ_FREQUENCY MOD_FREQUENCY
|
|
# endif
|
|
# if !defined ADJ_TIMECONST && defined MOD_TIMECONST
|
|
# define ADJ_TIMECONST MOD_TIMECONST
|
|
# endif
|
|
# if !defined ADJ_TICK && defined MOD_CLKB
|
|
# define ADJ_TICK MOD_CLKB
|
|
# endif
|
|
|
|
#else
|
|
|
|
# define bb_setpgrp() setpgrp()
|
|
|
|
#endif
|
|
|
|
#if defined(__GLIBC__)
|
|
# define fdprintf dprintf
|
|
#endif
|
|
|
|
#if defined(__dietlibc__)
|
|
# undef HAVE_STRCHRNUL
|
|
#endif
|
|
|
|
#if defined(__WATCOMC__)
|
|
# undef HAVE_FDPRINTF
|
|
# undef HAVE_MEMRCHR
|
|
# undef HAVE_MKDTEMP
|
|
# undef HAVE_SETBIT
|
|
# undef HAVE_STRCASESTR
|
|
# undef HAVE_STRCHRNUL
|
|
# undef HAVE_STRSIGNAL
|
|
# undef HAVE_VASPRINTF
|
|
#endif
|
|
|
|
#if defined(__FreeBSD__)
|
|
# undef HAVE_STRCHRNUL
|
|
#endif
|
|
|
|
/*
|
|
* Now, define prototypes for all the functions defined in platform.c
|
|
* These must come after all the HAVE_* macros are defined (or not)
|
|
*/
|
|
|
|
#ifndef HAVE_FDPRINTF
|
|
extern int fdprintf(int fd, const char *format, ...);
|
|
#endif
|
|
|
|
#ifndef HAVE_MEMRCHR
|
|
extern void *memrchr(const void *s, int c, size_t n) FAST_FUNC;
|
|
#endif
|
|
|
|
#ifndef HAVE_MKDTEMP
|
|
extern char *mkdtemp(char *template) FAST_FUNC;
|
|
#endif
|
|
|
|
#ifndef HAVE_SETBIT
|
|
# define setbit(a, b) ((a)[(b) >> 3] |= 1 << ((b) & 7))
|
|
# define clrbit(a, b) ((a)[(b) >> 3] &= ~(1 << ((b) & 7)))
|
|
#endif
|
|
|
|
#ifndef HAVE_STRCASESTR
|
|
extern char *strcasestr(const char *s, const char *pattern) FAST_FUNC;
|
|
#endif
|
|
|
|
#ifndef HAVE_STRCHRNUL
|
|
extern char *strchrnul(const char *s, int c) FAST_FUNC;
|
|
#endif
|
|
|
|
#ifndef HAVE_STRSIGNAL
|
|
/* Not exactly the same: instead of "Stopped" it shows "STOP" etc */
|
|
# define strsignal(sig) get_signame(sig)
|
|
#endif
|
|
|
|
#ifndef HAVE_VASPRINTF
|
|
extern int vasprintf(char **string_ptr, const char *format, va_list p) FAST_FUNC;
|
|
#endif
|
|
|
|
#endif
|