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923edabe6c0860fe7ea9350030f72ddc41c1df6c
sudo/include/missing.h
Todd C. Miller 923edabe6c Convert sudo to use BSD TAILQ macros instead of home ground tail 
queue functions.  This includes a private queue.h header derived
from FreeBSD.  It is simpler to just use our own header rather than
try to deal with macros that may or may not be present in various
queue.h incarnations.
2013-10-22 09:00:37 -06:00

436 lines
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/*
* Copyright (c) 1996, 1998-2005, 2008, 2009-2013
* 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_MISSING_H
#define _SUDO_MISSING_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
/* 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
/*
* 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 _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))
/*
* Some systems define this in <sys/param.h> but we don't include that anymore.
*/
#ifndef howmany
# define howmany(x, y) (((x) + ((y) - 1)) / (y))
#endif
/*
* 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
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
/*
* 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(void);
void setprogname(const char *);
# endif /* HAVE___PROGNAME */
#endif /* !HAVE_GETPROGNAME */
/*
* 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 */
#ifndef timevalclear
# define timevalclear(tv) ((tv)->tv_sec = (tv)->tv_usec = 0)
#endif
#ifndef timevalisset
# define timevalisset(tv) ((tv)->tv_sec || (tv)->tv_usec)
#endif
#ifndef timevalcmp
# define timevalcmp(tv1, tv2, op) \
(((tv1)->tv_sec == (tv2)->tv_sec) ? \
((tv1)->tv_usec op (tv2)->tv_usec) : \
((tv1)->tv_sec op (tv2)->tv_sec))
#endif
#ifndef timevaladd
# define timevaladd(tv1, tv2) \
do { \
(tv1)->tv_sec += (tv2)->tv_sec; \
(tv1)->tv_usec += (tv2)->tv_usec; \
if ((tv1)->tv_usec >= 1000000) { \
(tv1)->tv_sec++; \
(tv1)->tv_usec -= 1000000; \
} \
} while (0)
#endif
#ifndef timevalsub
# define timevalsub(tv1, tv2) \
do { \
(tv1)->tv_sec -= (tv2)->tv_sec; \
(tv1)->tv_usec -= (tv2)->tv_usec; \
if ((tv1)->tv_usec < 0) { \
(tv1)->tv_sec--; \
(tv1)->tv_usec += 1000000; \
} \
} while (0)
#endif
/* 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
/* Functions "missing" from libc. */
struct timeval;
struct timespec;
#ifndef HAVE_CLOSEFROM
void closefrom(int);
#endif
#ifndef HAVE_GETCWD
char *getcwd(char *, size_t size);
#endif
#ifndef HAVE_GETGROUPLIST
int getgrouplist(const char *, gid_t, gid_t *, int *);
#endif
#ifndef HAVE_GETLINE
ssize_t getline(char **, size_t *, FILE *);
#endif
#ifndef HAVE_UTIMES
int utimes(const char *, const struct timeval *);
#endif
#ifdef HAVE_FUTIME
int futimes(int, const struct timeval *);
#endif
#ifndef HAVE_SNPRINTF
int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
#endif
#ifndef HAVE_VSNPRINTF
int vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
#endif
#ifndef HAVE_ASPRINTF
int asprintf(char **, const char *, ...) __printflike(2, 3);
#endif
#ifndef HAVE_VASPRINTF
int vasprintf(char **, const char *, va_list) __printflike(2, 0);
#endif
#ifndef HAVE_STRLCAT
size_t strlcat(char *, const char *, size_t);
#endif
#ifndef HAVE_STRLCPY
size_t strlcpy(char *, const char *, size_t);
#endif
#ifndef HAVE_MEMRCHR
void *memrchr(const void *, int, size_t);
#endif
#ifndef HAVE_MEMSET_S
errno_t memset_s(void *, rsize_t, int, rsize_t);
#endif
#ifndef HAVE_MKDTEMP
char *mkdtemp(char *);
#endif
#ifndef HAVE_MKSTEMPS
int mkstemps(char *, int);
#endif
#ifndef HAVE_NANOSLEEP
int nanosleep(const struct timespec *, struct timespec *);
#endif
#ifndef HAVE_PW_DUP
struct passwd *pw_dup(const struct passwd *);
#endif
#ifndef HAVE_SETENV
int setenv(const char *, const char *, int);
#endif
#ifndef HAVE_UNSETENV
int unsetenv(const char *);
#endif
#ifndef HAVE_STRSIGNAL
char *strsignal(int);
#endif
#ifndef HAVE_SIG2STR
int sig2str(int, char *);
#endif
#endif /* _SUDO_MISSING_H */
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