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 /* Define away __attribute__ for non-gcc or old gcc */
33 #if !defined(__GNUC__) || __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 5
34 # define __attribute__(x)
37 /* For silencing gcc warnings about rcsids */
39 # if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ > 7)
40 # define __unused __attribute__((__unused__))
46 /* For catching format string mismatches */
48 # if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 7)
49 # define __printflike(f, v) __attribute__((__format__ (__printf__, f, v)))
51 # define __printflike(f, v)
56 * Some systems lack full limit definitions.
63 # define INT_MAX 0x7fffffff
68 # define PATH_MAX MAXPATHLEN
70 # ifdef _POSIX_PATH_MAX
71 # define PATH_MAX _POSIX_PATH_MAX
73 # define PATH_MAX 1024
78 #ifndef MAXHOSTNAMELEN
79 # define MAXHOSTNAMELEN 64
83 * Posix versions for those without...
86 # define _S_IFMT S_IFMT
89 # define _S_IFREG S_IFREG
92 # define _S_IFDIR S_IFDIR
95 # define _S_IFLNK S_IFLNK
98 # define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
101 # define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
105 * Some OS's may not have this.
108 # define S_IRWXU 0000700 /* rwx for owner */
112 * These should be defined in <unistd.h> but not everyone has them.
115 # define STDIN_FILENO 0
117 #ifndef STDOUT_FILENO
118 # define STDOUT_FILENO 1
120 #ifndef STDERR_FILENO
121 # define STDERR_FILENO 2
125 * BSD defines these in <sys/param.h> but others may not.
128 # define MIN(a,b) (((a)<(b))?(a):(b))
131 # define MAX(a,b) (((a)>(b))?(a):(b))
135 * Simple isblank() macro and function for systems without it.
139 # define isblank(_x) ((_x) == ' ' || (_x) == '\t')
143 * NCR's SVr4 has _innetgr(3) instead of innetgr(3) for some reason.
146 # define innetgr(n, h, u, d) (_innetgr(n, h, u, d))
147 # define HAVE_INNETGR 1
148 #endif /* HAVE__INNETGR */
151 * On POSIX systems, O_NOCTTY is the default so some OS's may lack this define.
155 #endif /* O_NOCTTY */
158 * Add IRIX-like sigaction_t for those without it.
159 * SA_RESTART is not required by POSIX; SunOS has SA_INTERRUPT instead.
161 #ifndef HAVE_SIGACTION_T
162 typedef struct sigaction sigaction_t;
165 # define SA_INTERRUPT 0
168 # define SA_RESTART 0
172 * If dirfd() does not exists, hopefully dd_fd does.
174 #if !defined(HAVE_DIRFD) && defined(HAVE_DD_FD)
175 # define dirfd(_d) ((_d)->dd_fd)
180 * Define futimes() in terms of futimesat() if needed.
182 #if !defined(HAVE_FUTIMES) && defined(HAVE_FUTIMESAT)
183 # define futimes(_f, _tv) futimesat(_f, NULL, _tv)
184 # define HAVE_FUTIMES
187 #if !defined(HAVE_KILLPG) && !defined(killpg)
188 # define killpg(s) kill(-(s))
192 * If we lack getprogname(), emulate with __progname if possible.
193 * Otherwise, add a prototype for use with our own getprogname.c.
195 #ifndef HAVE_GETPROGNAME
196 # ifdef HAVE___PROGNAME
197 extern const char *__progname;
198 # define getprogname() (__progname)
200 const char *getprogname(void);
201 void setprogname(const char *);
202 #endif /* HAVE___PROGNAME */
203 #endif /* !HAVE_GETPROGNAME */
206 # define timevalclear(tv) ((tv)->tv_sec = (tv)->tv_usec = 0)
209 # define timevalisset(tv) ((tv)->tv_sec || (tv)->tv_usec)
212 # define timevalcmp(tv1, tv2, op) \
213 (((tv1)->tv_sec == (tv2)->tv_sec) ? \
214 ((tv1)->tv_usec op (tv2)->tv_usec) : \
215 ((tv1)->tv_sec op (tv2)->tv_sec))
218 # define timevaladd(tv1, tv2) \
220 (tv1)->tv_sec += (tv2)->tv_sec; \
221 (tv1)->tv_usec += (tv2)->tv_usec; \
222 if ((tv1)->tv_usec >= 1000000) { \
224 (tv1)->tv_usec -= 1000000; \
229 # define timevalsub(tv1, tv2) \
231 (tv1)->tv_sec -= (tv2)->tv_sec; \
232 (tv1)->tv_usec -= (tv2)->tv_usec; \
233 if ((tv1)->tv_usec < 0) { \
235 (tv1)->tv_usec += 1000000; \
240 /* Not all systems define NSIG in signal.h */
244 # elif defined(__NSIG)
252 # define WCOREDUMP(x) ((x) & 0x80)
256 # if defined(HAVE_SETRESUID)
257 # define seteuid(u) setresuid(-1, (u), -1)
258 # define setegid(g) setresgid(-1, (g), -1)
259 # define HAVE_SETEUID 1
260 # elif defined(HAVE_SETREUID)
261 # define seteuid(u) setreuid(-1, (u))
262 # define setegid(g) setregid(-1, (g))
263 # define HAVE_SETEUID 1
265 #endif /* HAVE_SETEUID */
268 * HP-UX does not declare innetgr() or getdomainname().
269 * Solaris does not declare getdomainname().
272 int innetgr(const char *, const char *, const char *, const char *);
274 #if defined(__hpux) || defined(__sun)
275 int getdomainname(char *, size_t);
278 /* Functions "missing" from libc. */
283 #ifndef HAVE_CLOSEFROM
287 char *getcwd(char *, size_t size);
290 ssize_t getline(char **, size_t *, FILE *);
293 int utimes(const char *, const struct timeval *);
296 int futimes(int, const struct timeval *);
298 #ifndef HAVE_SNPRINTF
299 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
301 #ifndef HAVE_VSNPRINTF
302 int vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
304 #ifndef HAVE_ASPRINTF
305 int asprintf(char **, const char *, ...) __printflike(2, 3);
307 #ifndef HAVE_VASPRINTF
308 int vasprintf(char **, const char *, va_list) __printflike(2, 0);
311 size_t strlcat(char *, const char *, size_t);
314 size_t strlcpy(char *, const char *, size_t);
317 void *memrchr(const void *, int, size_t);
320 char *mkdtemp(char *);
322 #ifndef HAVE_MKSTEMPS
323 int mkstemps(char *, int);
325 #ifndef HAVE_NANOSLEEP
326 int nanosleep(const struct timespec *, struct timespec *);
329 int setenv(const char *, const char *, int);
331 #ifndef HAVE_UNSETENV
332 int unsetenv(const char *);
334 #ifndef HAVE_STRSIGNAL
335 char *strsignal(int);
338 #endif /* _SUDO_MISSING_H */