2 * Copyright (c) 1996, 1998-2005, 2008, 2009-2013
3 * Todd C. Miller <Todd.Miller@courtesan.com>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 * Sponsored in part by the Defense Advanced Research Projects
18 * Agency (DARPA) and Air Force Research Laboratory, Air Force
19 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
22 #ifndef _SUDO_MISSING_H
23 #define _SUDO_MISSING_H
29 * Macros and functions that may be missing on some operating systems.
32 #ifndef __GNUC_PREREQ__
34 # define __GNUC_PREREQ__(ma, mi) \
35 ((__GNUC__ > (ma)) || (__GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)))
37 # define __GNUC_PREREQ__(ma, mi) 0
41 /* Define away __attribute__ for non-gcc or old gcc */
42 #if !defined(__attribute__) && !__GNUC_PREREQ__(2, 5)
43 # define __attribute__(x)
46 /* For catching format string mismatches */
48 # if __GNUC_PREREQ__(2, 7)
49 # define __printflike(f, v) __attribute__((__format__ (__printf__, f, v)))
51 # define __printflike(f, v)
55 /* Hint to compiler that returned pointer is unique (malloc but not realloc). */
57 # if __GNUC_PREREQ__(2, 96)
58 # define __malloc_like __attribute__((__malloc__))
60 # define __malloc_like
65 # ifdef HAVE_DSO_VISIBILITY
66 # if defined(__GNUC__)
67 # define __dso_public __attribute__((__visibility__("default")))
68 # define __dso_hidden __attribute__((__visibility__("hidden")))
69 # elif defined(__SUNPRO_C)
70 # define __dso_public __global
71 # define __dso_hidden __hidden
73 # define __dso_public __declspec(dllexport)
83 * Some systems lack full limit definitions.
90 # define INT_MAX 0x7fffffff
94 # ifdef _POSIX_PATH_MAX
95 # define PATH_MAX _POSIX_PATH_MAX
101 #ifndef HOST_NAME_MAX
102 # ifdef _POSIX_HOST_NAME_MAX
103 # define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
105 # define HOST_NAME_MAX 255
110 * Posix versions for those without...
113 # define _S_IFMT S_IFMT
116 # define _S_IFREG S_IFREG
117 #endif /* _S_IFREG */
119 # define _S_IFDIR S_IFDIR
120 #endif /* _S_IFDIR */
122 # define _S_IFLNK S_IFLNK
123 #endif /* _S_IFLNK */
125 # define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
128 # define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
132 * Some OS's may not have this.
135 # define S_IRWXU 0000700 /* rwx for owner */
139 * These should be defined in <unistd.h> but not everyone has them.
142 # define STDIN_FILENO 0
144 #ifndef STDOUT_FILENO
145 # define STDOUT_FILENO 1
147 #ifndef STDERR_FILENO
148 # define STDERR_FILENO 2
152 * BSD defines these in <sys/param.h> but we don't include that anymore.
155 # define MIN(a,b) (((a)<(b))?(a):(b))
158 # define MAX(a,b) (((a)>(b))?(a):(b))
161 /* Macros to set/clear/test flags. */
163 #define SET(t, f) ((t) |= (f))
165 #define CLR(t, f) ((t) &= ~(f))
167 #define ISSET(t, f) ((t) & (f))
170 * Some systems define this in <sys/param.h> but we don't include that anymore.
173 # define howmany(x, y) (((x) + ((y) - 1)) / (y))
177 * Older systems may be missing stddef.h and/or offsetof macro
181 # define offsetof(type, field) __offsetof(type, field)
183 # define offsetof(type, field) ((size_t)(&((type *)0)->field))
188 * Simple isblank() macro and function for systems without it.
192 # define isblank(_x) ((_x) == ' ' || (_x) == '\t')
196 * NCR's SVr4 has _innetgr(3) instead of innetgr(3) for some reason.
199 # define innetgr(n, h, u, d) (_innetgr(n, h, u, d))
200 # define HAVE_INNETGR 1
201 #endif /* HAVE__INNETGR */
204 * On POSIX systems, O_NOCTTY is the default so some OS's may lack this define.
208 #endif /* O_NOCTTY */
211 * Add IRIX-like sigaction_t for those without it.
212 * SA_RESTART is not required by POSIX; SunOS has SA_INTERRUPT instead.
214 #ifndef HAVE_SIGACTION_T
215 typedef struct sigaction sigaction_t;
218 # define SA_INTERRUPT 0
221 # define SA_RESTART 0
225 * If dirfd() does not exists, hopefully dd_fd does.
227 #if !defined(HAVE_DIRFD) && defined(HAVE_DD_FD)
228 # define dirfd(_d) ((_d)->dd_fd)
233 * Define futimes() in terms of futimesat() if needed.
235 #if !defined(HAVE_FUTIMES) && defined(HAVE_FUTIMESAT)
236 # define futimes(_f, _tv) futimesat(_f, NULL, _tv)
237 # define HAVE_FUTIMES
240 #if !defined(HAVE_KILLPG) && !defined(killpg)
241 # define killpg(s) kill(-(s))
245 * If we lack getprogname(), emulate with __progname if possible.
246 * Otherwise, add a prototype for use with our own getprogname.c.
248 #ifndef HAVE_GETPROGNAME
249 # ifdef HAVE___PROGNAME
250 extern const char *__progname;
251 # define getprogname() (__progname)
253 const char *getprogname(void);
254 void setprogname(const char *);
255 # endif /* HAVE___PROGNAME */
256 #endif /* !HAVE_GETPROGNAME */
259 * Declare errno if errno.h doesn't do it for us.
261 #if defined(HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
263 #endif /* !HAVE_DECL_ERRNO */
266 # define timevalclear(tv) ((tv)->tv_sec = (tv)->tv_usec = 0)
269 # define timevalisset(tv) ((tv)->tv_sec || (tv)->tv_usec)
272 # define timevalcmp(tv1, tv2, op) \
273 (((tv1)->tv_sec == (tv2)->tv_sec) ? \
274 ((tv1)->tv_usec op (tv2)->tv_usec) : \
275 ((tv1)->tv_sec op (tv2)->tv_sec))
278 # define timevaladd(tv1, tv2) \
280 (tv1)->tv_sec += (tv2)->tv_sec; \
281 (tv1)->tv_usec += (tv2)->tv_usec; \
282 if ((tv1)->tv_usec >= 1000000) { \
284 (tv1)->tv_usec -= 1000000; \
289 # define timevalsub(tv1, tv2) \
291 (tv1)->tv_sec -= (tv2)->tv_sec; \
292 (tv1)->tv_usec -= (tv2)->tv_usec; \
293 if ((tv1)->tv_usec < 0) { \
295 (tv1)->tv_usec += 1000000; \
300 /* Not all systems define NSIG in signal.h */
304 # elif defined(__NSIG)
313 # define SIG2STR_MAX 32
317 # define WCOREDUMP(x) ((x) & 0x80)
321 # if defined(HAVE_SETRESUID)
322 # define seteuid(u) setresuid(-1, (u), -1)
323 # define setegid(g) setresgid(-1, (g), -1)
324 # define HAVE_SETEUID 1
325 # elif defined(HAVE_SETREUID)
326 # define seteuid(u) setreuid(-1, (u))
327 # define setegid(g) setregid(-1, (g))
328 # define HAVE_SETEUID 1
330 #endif /* HAVE_SETEUID */
333 * HP-UX does not declare innetgr() or getdomainname().
334 * Solaris does not declare getdomainname().
337 int innetgr(const char *, const char *, const char *, const char *);
339 #if defined(__hpux) || defined(__sun)
340 int getdomainname(char *, size_t);
343 /* Functions "missing" from libc. */
348 #ifndef HAVE_CLOSEFROM
352 char *getcwd(char *, size_t size);
354 #ifndef HAVE_GETGROUPLIST
355 int getgrouplist(const char *, gid_t, gid_t *, int *);
358 ssize_t getline(char **, size_t *, FILE *);
361 int utimes(const char *, const struct timeval *);
364 int futimes(int, const struct timeval *);
366 #ifndef HAVE_SNPRINTF
367 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
369 #ifndef HAVE_VSNPRINTF
370 int vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
372 #ifndef HAVE_ASPRINTF
373 int asprintf(char **, const char *, ...) __printflike(2, 3);
375 #ifndef HAVE_VASPRINTF
376 int vasprintf(char **, const char *, va_list) __printflike(2, 0);
379 size_t strlcat(char *, const char *, size_t);
382 size_t strlcpy(char *, const char *, size_t);
385 void *memrchr(const void *, int, size_t);
388 char *mkdtemp(char *);
390 #ifndef HAVE_MKSTEMPS
391 int mkstemps(char *, int);
393 #ifndef HAVE_NANOSLEEP
394 int nanosleep(const struct timespec *, struct timespec *);
397 struct passwd *pw_dup(const struct passwd *);
400 int setenv(const char *, const char *, int);
402 #ifndef HAVE_UNSETENV
403 int unsetenv(const char *);
405 #ifndef HAVE_STRSIGNAL
406 char *strsignal(int);
409 int sig2str(int, char *);
412 #endif /* _SUDO_MISSING_H */