/* * Copyright (c) 1996, 1998-2005 Todd C. Miller * * 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. * * $Sudo: compat.h,v 1.76.2.4 2007/06/12 01:28:41 millert Exp $ */ #ifndef _SUDO_COMPAT_H #define _SUDO_COMPAT_H /* * Macros that may be missing on some Operating Systems */ /* Deal with ANSI stuff reasonably. */ #ifndef __P # if defined (__cplusplus) || defined (__STDC__) # define __P(args) args # else # define __P(args) () # endif #endif /* __P */ /* Define away __attribute__ for non-gcc or old gcc */ #if !defined(__GNUC__) || __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 5 # define __attribute__(x) #endif /* For silencing gcc warnings about rcsids */ #ifndef __unused # if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ > 7) # define __unused __attribute__((__unused__)) # else # define __unused # endif #endif /* For catching format string mismatches */ #ifndef __printflike # if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 7) # define __printflike(f, v) __attribute__((__format__ (__printf__, f, v))) # else # define __printflike(f, v) # endif #endif /* * Some systems lack full limit definitions. */ #ifndef OPEN_MAX # define OPEN_MAX 256 #endif #ifndef INT_MAX # define INT_MAX 0x7fffffff #endif #ifndef PATH_MAX # ifdef MAXPATHLEN # define PATH_MAX MAXPATHLEN # else # ifdef _POSIX_PATH_MAX # define PATH_MAX _POSIX_PATH_MAX # else # define PATH_MAX 1024 # endif # endif #endif #ifndef MAXHOSTNAMELEN # define MAXHOSTNAMELEN 64 #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 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 /* * These should be defined in but not everyone has them. */ #ifndef SEEK_SET # define SEEK_SET 0 #endif #ifndef SEEK_CUR # define SEEK_CUR 1 #endif #ifndef SEEK_END # define SEEK_END 2 #endif /* * BSD defines these in but others may not. */ #ifndef MIN # define MIN(a,b) (((a)<(b))?(a):(b)) #endif #ifndef MAX # define MAX(a,b) (((a)>(b))?(a):(b)) #endif /* * Simple isblank() macro for systems without it. */ #ifndef HAVE_ISBLANK # define isblank(_x) ((_x) == ' ' || (_x) == '\t') #endif /* * Old BSD systems lack strchr(), strrchr(), memset() and memcpy() */ #if !defined(HAVE_STRCHR) && !defined(strchr) # define strchr(_s, _c) index(_s, _c) #endif #if !defined(HAVE_STRRCHR) && !defined(strrchr) # define strrchr(_s, _c) rindex(_s, _c) #endif #if !defined(HAVE_MEMCPY) && !defined(memcpy) # define memcpy(_d, _s, _n) (bcopy(_s, _d, _n)) #endif #if !defined(HAVE_MEMSET) && !defined(memset) # define memset(_s, _x, _n) (bzero(_s, _n)) #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 */ /* * Emulate POSIX signals via sigvec(2) */ #ifndef HAVE_SIGACTION # define SA_ONSTACK SV_ONSTACK # define SA_RESTART SV_INTERRUPT /* opposite effect */ # define SA_RESETHAND SV_RESETHAND # define sa_handler sv_handler # define sa_mask sv_mask # define sa_flags sv_flags typedef struct sigvec sigaction_t; typedef int sigset_t; int sigaction __P((int sig, const sigaction_t *act, sigaction_t *oact)); int sigemptyset __P((sigset_t *)); int sigfillset __P((sigset_t *)); int sigaddset __P((sigset_t *, int)); int sigdelset __P((sigset_t *, int)); int sigismember __P((sigset_t *, int)); int sigprocmask __P((int, const sigset_t *, sigset_t *)); #endif /* * Extra sugar for POSIX signals to deal with the above emulation * as well as the fact that SunOS has a SA_INTERRUPT flag. */ #ifdef HAVE_SIGACTION # 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 #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 we lack getprogname(), emulate with __progname if possible. * Otherwise, add a prototype for use with our own getprogname.c. */ #ifndef HAVE_GETPROGNAME # ifdef HAVE___PROGNAME extern const char *__progname; # define getprogname() (__progname) # else const char *getprogname __P((void)); #endif /* HAVE___PROGNAME */ #endif /* !HAVE_GETPROGNAME */ #ifndef timespecclear # define timespecclear(ts) (ts)->tv_sec = (ts)->tv_nsec = 0 #endif #ifndef timespecisset # define timespecisset(ts) ((ts)->tv_sec || (ts)->tv_nsec) #endif #ifndef timespecsub # define timespecsub(minuend, subrahend, difference) \ do { \ (difference)->tv_sec = (minuend)->tv_sec - (subrahend)->tv_sec; \ (difference)->tv_nsec = (minuend)->tv_nsec - (subrahend)->tv_nsec; \ if ((difference)->tv_nsec < 0) { \ (difference)->tv_nsec += 1000000000L; \ (difference)->tv_sec--; \ } \ } while (0) #endif #endif /* _SUDO_COMPAT_H */