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be2de71df40de73e67400e50e5d7e5bd024155a3
sudo/include/sudo_compat.h
Todd C. Miller ccc210eddb If a system lacks mkdtemp() or mkstemps(), use our own mkdtemp() 
and mkstemps().  Previously we only exposed the missing one but
since the guts are the same we might as well use them.
2014-10-29 13:03:39 -06:00

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/*
* Copyright (c) 1996, 1998-2005, 2008, 2009-2014
* Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#ifndef _SUDO_COMPAT_H
#define _SUDO_COMPAT_H
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stddef.h>
#endif
#include <stdarg.h>
/*
* Macros and functions that may be missing on some operating systems.
*/
#ifndef __GNUC_PREREQ__
# ifdef __GNUC__
# define __GNUC_PREREQ__(ma, mi) \
((__GNUC__ > (ma)) || (__GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)))
# else
# define __GNUC_PREREQ__(ma, mi) 0
# endif
#endif
/* Define away __attribute__ for non-gcc or old gcc */
#if !defined(__attribute__) && !__GNUC_PREREQ__(2, 5)
# define __attribute__(x)
#endif
/* For catching format string mismatches */
#ifndef __printflike
# if __GNUC_PREREQ__(3, 3)
# define __printflike(f, v) __attribute__((__format__ (__printf__, f, v))) __attribute__((__nonnull__ (f)))
# elif __GNUC_PREREQ__(2, 7)
# define __printflike(f, v) __attribute__((__format__ (__printf__, f, v)))
# else
# define __printflike(f, v)
# endif
#endif
#ifndef __printf0like
# if __GNUC_PREREQ__(2, 7)
# define __printf0like(f, v) __attribute__((__format__ (__printf__, f, v)))
# else
# define __printf0like(f, v)
# endif
#endif
#ifndef __format_arg
# if __GNUC_PREREQ__(2, 7)
# define __format_arg(f) __attribute__((__format_arg__ (f)))
# else
# define __format_arg(f)
# endif
#endif
/* Hint to compiler that returned pointer is unique (malloc but not realloc). */
#ifndef __malloc_like
# if __GNUC_PREREQ__(2, 96)
# define __malloc_like __attribute__((__malloc__))
# else
# define __malloc_like
# endif
#endif
/*
* Given the pointer x to the member m of the struct s, return
* a pointer to the containing structure.
*/
#ifndef __containerof
# define __containerof(x, s, m) ((s *)((char *)(x) - offsetof(s, m)))
#endif
#ifndef __dso_public
# ifdef HAVE_DSO_VISIBILITY
# if defined(__GNUC__)
# define __dso_public __attribute__((__visibility__("default")))
# define __dso_hidden __attribute__((__visibility__("hidden")))
# elif defined(__SUNPRO_C)
# define __dso_public __global
# define __dso_hidden __hidden
# else
# define __dso_public __declspec(dllexport)
# define __dso_hidden
# endif
# else
# define __dso_public
# define __dso_hidden
# endif
#endif
/*
* Pre-C99 compilers may lack a va_copy macro.
*/
#ifndef va_copy
# ifdef __va_copy
# define va_copy(d, s) __va_copy(d, s)
# else
# define va_copy(d, s) memcpy(&(d), &(s), sizeof(d));
# endif
#endif
/*
* Some systems lack full limit definitions.
*/
#ifndef OPEN_MAX
# define OPEN_MAX 256
#endif
#ifndef LLONG_MAX
# if defined(QUAD_MAX)
# define LLONG_MAX QUAD_MAX
# else
# define LLONG_MAX 0x7fffffffffffffffLL
# endif
#endif
#ifndef LLONG_MIN
# if defined(QUAD_MIN)
# define LLONG_MIN QUAD_MIN
# else
# define LLONG_MIN (-0x7fffffffffffffffLL-1)
# endif
#endif
#ifndef ULLONG_MAX
# if defined(UQUAD_MAX)
# define ULLONG_MAX UQUAD_MAX
# else
# define ULLONG_MAX 0xffffffffffffffffULL
# endif
#endif
#ifndef SIZE_MAX
# ifdef SIZE_T_MAX
# define SIZE_MAX SIZE_T_MAX
# else
# define SIZE_MAX ULONG_MAX
# endif /* SIZE_T_MAX */
#endif /* SIZE_MAX */
#ifndef PATH_MAX
# ifdef _POSIX_PATH_MAX
# define PATH_MAX _POSIX_PATH_MAX
# else
# define PATH_MAX 256
# endif
#endif
#ifndef HOST_NAME_MAX
# ifdef _POSIX_HOST_NAME_MAX
# define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
# else
# define HOST_NAME_MAX 255
# endif
#endif
/*
* Posix versions for those without...
*/
#ifndef _S_IFMT
# define _S_IFMT S_IFMT
#endif /* _S_IFMT */
#ifndef _S_IFREG
# define _S_IFREG S_IFREG
#endif /* _S_IFREG */
#ifndef _S_IFDIR
# define _S_IFDIR S_IFDIR
#endif /* _S_IFDIR */
#ifndef _S_IFLNK
# define _S_IFLNK S_IFLNK
#endif /* _S_IFLNK */
#ifndef S_ISREG
# define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
#endif /* S_ISREG */
#ifndef S_ISDIR
# define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
#endif /* S_ISDIR */
/*
* Some OS's may not have this.
*/
#ifndef S_IRWXU
# define S_IRWXU 0000700 /* rwx for owner */
#endif /* S_IRWXU */
/*
* These should be defined in <unistd.h> but not everyone has them.
*/
#ifndef STDIN_FILENO
# define STDIN_FILENO 0
#endif
#ifndef STDOUT_FILENO
# define STDOUT_FILENO 1
#endif
#ifndef STDERR_FILENO
# define STDERR_FILENO 2
#endif
/*
* BSD defines these in <sys/param.h> but we don't include that anymore.
*/
#ifndef MIN
# define MIN(a,b) (((a)<(b))?(a):(b))
#endif
#ifndef MAX
# define MAX(a,b) (((a)>(b))?(a):(b))
#endif
/* Macros to set/clear/test flags. */
#undef SET
#define SET(t, f) ((t) |= (f))
#undef CLR
#define CLR(t, f) ((t) &= ~(f))
#undef ISSET
#define ISSET(t, f) ((t) & (f))
/*
* Older systems may be missing stddef.h and/or offsetof macro
*/
#ifndef offsetof
# ifdef __offsetof
# define offsetof(type, field) __offsetof(type, field)
# else
# define offsetof(type, field) ((size_t)(&((type *)0)->field))
# endif
#endif
/*
* Simple isblank() macro and function for systems without it.
*/
#ifndef HAVE_ISBLANK
__dso_public int isblank(int);
# define isblank(_x) ((_x) == ' ' || (_x) == '\t')
#endif
/*
* NCR's SVr4 has _innetgr(3) instead of innetgr(3) for some reason.
*/
#ifdef HAVE__INNETGR
# define innetgr(n, h, u, d) (_innetgr(n, h, u, d))
# define HAVE_INNETGR 1
#endif /* HAVE__INNETGR */
/*
* On POSIX systems, O_NOCTTY is the default so some OS's may lack this define.
*/
#ifndef O_NOCTTY
# define O_NOCTTY 0
#endif /* O_NOCTTY */
/*
* Add IRIX-like sigaction_t for those without it.
* SA_RESTART is not required by POSIX; SunOS has SA_INTERRUPT instead.
*/
#ifndef HAVE_SIGACTION_T
typedef struct sigaction sigaction_t;
#endif
#ifndef SA_INTERRUPT
# define SA_INTERRUPT 0
#endif
#ifndef SA_RESTART
# define SA_RESTART 0
#endif
/*
* If dirfd() does not exists, hopefully dd_fd does.
*/
#if !defined(HAVE_DIRFD) && defined(HAVE_DD_FD)
# define dirfd(_d) ((_d)->dd_fd)
# define HAVE_DIRFD
#endif
/*
* Define futimes() in terms of futimesat() if needed.
*/
#if !defined(HAVE_FUTIMES) && defined(HAVE_FUTIMESAT)
# define futimes(_f, _tv) futimesat(_f, NULL, _tv)
# define HAVE_FUTIMES
#endif
#if !defined(HAVE_KILLPG) && !defined(killpg)
# define killpg(s) kill(-(s))
#endif
/*
* Declare errno if errno.h doesn't do it for us.
*/
#if defined(HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
extern int errno;
#endif /* !HAVE_DECL_ERRNO */
/* Not all systems define NSIG in signal.h */
#if !defined(NSIG)
# if defined(_NSIG)
# define NSIG _NSIG
# elif defined(__NSIG)
# define NSIG __NSIG
# else
# define NSIG 64
# endif
#endif
/* For sig2str() */
#ifndef SIG2STR_MAX
# define SIG2STR_MAX 32
#endif
#ifndef WCOREDUMP
# define WCOREDUMP(x) ((x) & 0x80)
#endif
#ifndef HAVE_SETEUID
# if defined(HAVE_SETRESUID)
# define seteuid(u) setresuid(-1, (u), -1)
# define setegid(g) setresgid(-1, (g), -1)
# define HAVE_SETEUID 1
# elif defined(HAVE_SETREUID)
# define seteuid(u) setreuid(-1, (u))
# define setegid(g) setregid(-1, (g))
# define HAVE_SETEUID 1
# endif
#endif /* HAVE_SETEUID */
/*
* HP-UX does not declare innetgr() or getdomainname().
* Solaris does not declare getdomainname().
*/
#if defined(__hpux)
int innetgr(const char *, const char *, const char *, const char *);
#endif
#if defined(__hpux) || defined(__sun)
int getdomainname(char *, size_t);
#endif
/* We wrap OpenBSD's strtonum() to get translatable error strings. */
__dso_public long long sudo_strtonum(const char *, long long, long long, const char **);
#undef strtonum
#define strtonum(_a, _b, _c, _d) sudo_strtonum((_a), (_b), (_c), (_d))
/*
* Functions "missing" from libc.
* All libc replacements are prefixed with "sudo_" to avoid namespace issues.
*/
struct timeval;
struct timespec;
#ifndef HAVE_CLOSEFROM
__dso_public void sudo_closefrom(int);
# undef closefrom
# define closefrom(_a) sudo_closefrom((_a))
#endif /* HAVE_CLOSEFROM */
#ifdef PREFER_PORTABLE_GETCWD
__dso_public char *sudo_getcwd(char *, size_t size);
# undef getcwd
# define getcwd(_a, _b) sudo_getcwd((_a), (_b))
#endif /* PREFER_PORTABLE_GETCWD */
#ifndef HAVE_GETGROUPLIST
__dso_public int sudo_getgrouplist(const char *name, gid_t basegid, gid_t *groups, int *ngroupsp);
# undef getgrouplist
# define getgrouplist(_a, _b, _c, _d) sudo_getgrouplist((_a), (_b), (_c), (_d))
#endif /* GETGROUPLIST */
#ifndef HAVE_GETLINE
__dso_public ssize_t sudo_getline(char **bufp, size_t *bufsizep, FILE *fp);
# undef getline
# define getline(_a, _b, _c) sudo_getline((_a), (_b), (_c))
#endif /* HAVE_GETLINE */
#ifndef HAVE_UTIMES
__dso_public int sudo_utimes(const char *file, const struct timeval *times);
# undef utimes
# define utimes(_a, _b) sudo_utimes((_a), (_b))
#endif /* HAVE_UTIMES */
#ifdef HAVE_FUTIME
__dso_public int sudo_futimes(int fd, const struct timeval *times);
# undef futimes
# define futimes(_a, _b) sudo_futimes((_a), (_b))
#endif /* HAVE_FUTIME */
#if !defined(HAVE_SNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
__dso_public int sudo_snprintf(char *str, size_t n, char const *fmt, ...) __printflike(3, 4);
# undef snprintf
# define snprintf sudo_snprintf
#endif /* HAVE_SNPRINTF */
#if !defined(HAVE_VSNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
__dso_public int sudo_vsnprintf(char *str, size_t n, const char *fmt, va_list ap) __printflike(3, 0);
# undef vsnprintf
# define vsnprintf sudo_vsnprintf
#endif /* HAVE_VSNPRINTF */
#if !defined(HAVE_ASPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
__dso_public int sudo_asprintf(char **str, char const *fmt, ...) __printflike(2, 3);
# undef asprintf
# define asprintf sudo_asprintf
#endif /* HAVE_ASPRINTF */
#if !defined(HAVE_VASPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
__dso_public int sudo_vasprintf(char **str, const char *fmt, va_list ap) __printflike(2, 0);
# undef vasprintf
# define vasprintf sudo_vasprintf
#endif /* HAVE_VASPRINTF */
#ifndef HAVE_STRLCAT
__dso_public size_t sudo_strlcat(char *dst, const char *src, size_t siz);
# undef strlcat
# define strlcat(_a, _b, _c) sudo_strlcat((_a), (_b), (_c))
#endif /* HAVE_STRLCAT */
#ifndef HAVE_STRLCPY
__dso_public size_t sudo_strlcpy(char *dst, const char *src, size_t siz);
# undef strlcpy
# define strlcpy(_a, _b, _c) sudo_strlcpy((_a), (_b), (_c))
#endif /* HAVE_STRLCPY */
#ifndef HAVE_MEMRCHR
__dso_public void *sudo_memrchr(const void *s, int c, size_t n);
# undef memrchr
# define memrchr(_a, _b, _c) sudo_memrchr((_a), (_b), (_c))
#endif /* HAVE_MEMRCHR */
#ifndef HAVE_MEMSET_S
__dso_public errno_t sudo_memset_s(void *v, rsize_t smax, int c, rsize_t n);
# undef memset_s
# define memset_s(_a, _b, _c, _d) sudo_memset_s((_a), (_b), (_c), (_d))
#endif /* HAVE_MEMSET_S */
#if !defined(HAVE_MKDTEMP) || !defined(HAVE_MKSTEMPS)
__dso_public char *sudo_mkdtemp(char *path);
# undef mkdtemp
# define mkdtemp(_a) sudo_mkdtemp((_a))
__dso_public int sudo_mkstemps(char *path, int slen);
# undef mkstemps
# define mkstemps(_a, _b) sudo_mkstemps((_a), (_b))
#endif /* !HAVE_MKDTEMP || !HAVE_MKSTEMPS */
#ifndef HAVE_PW_DUP
__dso_public struct passwd *sudo_pw_dup(const struct passwd *pw);
# undef pw_dup
# define pw_dup(_a) sudo_pw_dup((_a))
#endif /* HAVE_PW_DUP */
#ifndef HAVE_STRSIGNAL
__dso_public char *sudo_strsignal(int signo);
# undef strsignal
# define strsignal(_a) sudo_strsignal((_a))
#endif /* HAVE_STRSIGNAL */
#ifndef HAVE_SIG2STR
__dso_public int sudo_sig2str(int signo, char *signame);
# undef sig2str
# define sig2str(_a, _b) sudo_sig2str((_a), (_b))
#endif /* HAVE_SIG2STR */
#ifndef HAVE_CLOCK_GETTIME
# define CLOCK_REALTIME 0
# ifdef __MACH__
# define CLOCK_MONOTONIC 1
# endif
__dso_public int sudo_clock_gettime(clockid_t clock_id, struct timespec *tp);
# undef clock_gettime
# define clock_gettime(_a, _b) sudo_clock_gettime((_a), (_b))
#endif /* HAVE_CLOCK_GETTIME */
#if !defined(HAVE_INET_NTOP) && defined(_SUDO_NET_IFS_C)
__dso_public char *sudo_inet_ntop(int af, const void *src, char *dst, socklen_t size);
# undef inet_ntop
# define inet_ntop(_a, _b, _c, _d) sudo_inet_ntop((_a), (_b), (_c), (_d))
#endif /* HAVE_INET_NTOP */
#ifndef HAVE_INET_PTON
__dso_public int sudo_inet_pton(int af, const char *src, void *dst);
# undef inet_pton
# define inet_pton(_a, _b, _c) sudo_inet_pton((_a), (_b), (_c))
#endif /* HAVE_INET_PTON */
#ifndef HAVE_GETPROGNAME
__dso_public const char *sudo_getprogname(void);
# undef getprogname
# define getprogname() sudo_getprogname()
#endif /* HAVE_GETPROGNAME */
#endif /* _SUDO_COMPAT_H */
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