2 * Copyright (c) 1996, 1998-2005, 2008, 2009-2010
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)
56 # ifdef HAVE_DSO_VISIBILITY
57 # if defined(__GNUC__)
58 # define __dso_public __attribute__((__visibility__("default")))
59 # define __dso_hidden __attribute__((__visibility__("hidden")))
60 # elif defined(__SUNPRO_C)
61 # define __dso_public __global
62 # define __dso_hidden __hidden
64 # define __dso_public __declspec(dllexport)
74 * Some systems lack full limit definitions.
81 # define INT_MAX 0x7fffffff
86 # define PATH_MAX MAXPATHLEN
88 # ifdef _POSIX_PATH_MAX
89 # define PATH_MAX _POSIX_PATH_MAX
91 # define PATH_MAX 1024
96 #ifndef MAXHOSTNAMELEN
97 # define MAXHOSTNAMELEN 64
101 * Posix versions for those without...
104 # define _S_IFMT S_IFMT
107 # define _S_IFREG S_IFREG
108 #endif /* _S_IFREG */
110 # define _S_IFDIR S_IFDIR
111 #endif /* _S_IFDIR */
113 # define _S_IFLNK S_IFLNK
114 #endif /* _S_IFLNK */
116 # define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
119 # define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
123 * Some OS's may not have this.
126 # define S_IRWXU 0000700 /* rwx for owner */
130 * These should be defined in <unistd.h> but not everyone has them.
133 # define STDIN_FILENO 0
135 #ifndef STDOUT_FILENO
136 # define STDOUT_FILENO 1
138 #ifndef STDERR_FILENO
139 # define STDERR_FILENO 2
143 * BSD defines these in <sys/param.h> but others may not.
146 # define MIN(a,b) (((a)<(b))?(a):(b))
149 # define MAX(a,b) (((a)>(b))?(a):(b))
153 * Older systems may be missing stddef.h and/or offsetof macro
157 # define offsetof(type, field) __offsetof(type, field)
159 # define offsetof(type, field) ((size_t)(&((type *)0)->field))
164 * Simple isblank() macro and function for systems without it.
168 # define isblank(_x) ((_x) == ' ' || (_x) == '\t')
172 * NCR's SVr4 has _innetgr(3) instead of innetgr(3) for some reason.
175 # define innetgr(n, h, u, d) (_innetgr(n, h, u, d))
176 # define HAVE_INNETGR 1
177 #endif /* HAVE__INNETGR */
180 * On POSIX systems, O_NOCTTY is the default so some OS's may lack this define.
184 #endif /* O_NOCTTY */
187 * Add IRIX-like sigaction_t for those without it.
188 * SA_RESTART is not required by POSIX; SunOS has SA_INTERRUPT instead.
190 #ifndef HAVE_SIGACTION_T
191 typedef struct sigaction sigaction_t;
194 # define SA_INTERRUPT 0
197 # define SA_RESTART 0
201 * If dirfd() does not exists, hopefully dd_fd does.
203 #if !defined(HAVE_DIRFD) && defined(HAVE_DD_FD)
204 # define dirfd(_d) ((_d)->dd_fd)
209 * Define futimes() in terms of futimesat() if needed.
211 #if !defined(HAVE_FUTIMES) && defined(HAVE_FUTIMESAT)
212 # define futimes(_f, _tv) futimesat(_f, NULL, _tv)
213 # define HAVE_FUTIMES
216 #if !defined(HAVE_KILLPG) && !defined(killpg)
217 # define killpg(s) kill(-(s))
221 * If we lack getprogname(), emulate with __progname if possible.
222 * Otherwise, add a prototype for use with our own getprogname.c.
224 #ifndef HAVE_GETPROGNAME
225 # ifdef HAVE___PROGNAME
226 extern const char *__progname;
227 # define getprogname() (__progname)
229 const char *getprogname(void);
230 void setprogname(const char *);
231 #endif /* HAVE___PROGNAME */
232 #endif /* !HAVE_GETPROGNAME */
235 * Declare errno if errno.h doesn't do it for us.
237 #if defined(HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
239 #endif /* !HAVE_DECL_ERRNO */
242 # define timevalclear(tv) ((tv)->tv_sec = (tv)->tv_usec = 0)
245 # define timevalisset(tv) ((tv)->tv_sec || (tv)->tv_usec)
248 # define timevalcmp(tv1, tv2, op) \
249 (((tv1)->tv_sec == (tv2)->tv_sec) ? \
250 ((tv1)->tv_usec op (tv2)->tv_usec) : \
251 ((tv1)->tv_sec op (tv2)->tv_sec))
254 # define timevaladd(tv1, tv2) \
256 (tv1)->tv_sec += (tv2)->tv_sec; \
257 (tv1)->tv_usec += (tv2)->tv_usec; \
258 if ((tv1)->tv_usec >= 1000000) { \
260 (tv1)->tv_usec -= 1000000; \
265 # define timevalsub(tv1, tv2) \
267 (tv1)->tv_sec -= (tv2)->tv_sec; \
268 (tv1)->tv_usec -= (tv2)->tv_usec; \
269 if ((tv1)->tv_usec < 0) { \
271 (tv1)->tv_usec += 1000000; \
276 /* Not all systems define NSIG in signal.h */
280 # elif defined(__NSIG)
289 # define SIG2STR_MAX 32
293 # define WCOREDUMP(x) ((x) & 0x80)
297 # if defined(HAVE_SETRESUID)
298 # define seteuid(u) setresuid(-1, (u), -1)
299 # define setegid(g) setresgid(-1, (g), -1)
300 # define HAVE_SETEUID 1
301 # elif defined(HAVE_SETREUID)
302 # define seteuid(u) setreuid(-1, (u))
303 # define setegid(g) setregid(-1, (g))
304 # define HAVE_SETEUID 1
306 #endif /* HAVE_SETEUID */
309 * HP-UX does not declare innetgr() or getdomainname().
310 * Solaris does not declare getdomainname().
313 int innetgr(const char *, const char *, const char *, const char *);
315 #if defined(__hpux) || defined(__sun)
316 int getdomainname(char *, size_t);
319 /* Functions "missing" from libc. */
324 #ifndef HAVE_CLOSEFROM
328 char *getcwd(char *, size_t size);
330 #ifndef HAVE_GETGROUPLIST
331 int getgrouplist(const char *, gid_t, gid_t *, int *);
334 ssize_t getline(char **, size_t *, FILE *);
337 int utimes(const char *, const struct timeval *);
340 int futimes(int, const struct timeval *);
342 #ifndef HAVE_SNPRINTF
343 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
345 #ifndef HAVE_VSNPRINTF
346 int vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
348 #ifndef HAVE_ASPRINTF
349 int asprintf(char **, const char *, ...) __printflike(2, 3);
351 #ifndef HAVE_VASPRINTF
352 int vasprintf(char **, const char *, va_list) __printflike(2, 0);
355 size_t strlcat(char *, const char *, size_t);
358 size_t strlcpy(char *, const char *, size_t);
361 void *memrchr(const void *, int, size_t);
364 char *mkdtemp(char *);
366 #ifndef HAVE_MKSTEMPS
367 int mkstemps(char *, int);
369 #ifndef HAVE_NANOSLEEP
370 int nanosleep(const struct timespec *, struct timespec *);
373 struct passwd *pw_dup(const struct passwd *);
376 int setenv(const char *, const char *, int);
378 #ifndef HAVE_UNSETENV
379 int unsetenv(const char *);
381 #ifndef HAVE_STRSIGNAL
382 char *strsignal(int);
385 int sig2str(int, char *);
388 #endif /* _SUDO_MISSING_H */