Annotation of src/usr.bin/sudo/compat.h, Revision 1.11
1.1 millert 1: /*
1.10 millert 2: * Copyright (c) 1996, 1998-2005, 2008
3: * Todd C. Miller <Todd.Miller@courtesan.com>
1.1 millert 4: *
1.8 millert 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.
1.1 millert 8: *
1.8 millert 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.
1.1 millert 16: *
1.7 millert 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.
1.1 millert 20: */
21:
22: #ifndef _SUDO_COMPAT_H
23: #define _SUDO_COMPAT_H
24:
25: /*
26: * Macros that may be missing on some Operating Systems
27: */
28:
29: /* Deal with ANSI stuff reasonably. */
30: #ifndef __P
31: # if defined (__cplusplus) || defined (__STDC__)
32: # define __P(args) args
33: # else
34: # define __P(args) ()
35: # endif
36: #endif /* __P */
37:
1.9 millert 38: /* Define away __attribute__ for non-gcc or old gcc */
39: #if !defined(__GNUC__) || __GNUC__ < 2 || __GNUC__ == 2 && __GNUC_MINOR__ < 5
40: # define __attribute__(x)
41: #endif
1.10 millert 42:
1.9 millert 43: /* For silencing gcc warnings about rcsids */
44: #ifndef __unused
45: # if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ > 7)
1.10 millert 46: # define __unused __attribute__((__unused__))
1.9 millert 47: # else
48: # define __unused
49: # endif
50: #endif
51:
52: /* For catching format string mismatches */
53: #ifndef __printflike
54: # if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 7)
1.10 millert 55: # define __printflike(f, v) __attribute__((__format__ (__printf__, f, v)))
1.9 millert 56: # else
57: # define __printflike(f, v)
58: # endif
59: #endif
60:
1.1 millert 61: /*
1.8 millert 62: * Some systems lack full limit definitions.
1.1 millert 63: */
1.8 millert 64: #ifndef OPEN_MAX
65: # define OPEN_MAX 256
66: #endif
67:
68: #ifndef INT_MAX
69: # define INT_MAX 0x7fffffff
70: #endif
71:
72: #ifndef PATH_MAX
73: # ifdef MAXPATHLEN
74: # define PATH_MAX MAXPATHLEN
75: # else
76: # ifdef _POSIX_PATH_MAX
77: # define PATH_MAX _POSIX_PATH_MAX
78: # else
79: # define PATH_MAX 1024
80: # endif
81: # endif
1.1 millert 82: #endif
83:
84: #ifndef MAXHOSTNAMELEN
85: # define MAXHOSTNAMELEN 64
86: #endif
87:
88: /*
89: * Posix versions for those without...
90: */
91: #ifndef _S_IFMT
92: # define _S_IFMT S_IFMT
93: #endif /* _S_IFMT */
94: #ifndef _S_IFREG
95: # define _S_IFREG S_IFREG
96: #endif /* _S_IFREG */
97: #ifndef _S_IFDIR
98: # define _S_IFDIR S_IFDIR
99: #endif /* _S_IFDIR */
100: #ifndef _S_IFLNK
101: # define _S_IFLNK S_IFLNK
102: #endif /* _S_IFLNK */
103: #ifndef S_ISREG
104: # define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
105: #endif /* S_ISREG */
106: #ifndef S_ISDIR
107: # define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
108: #endif /* S_ISDIR */
109:
110: /*
111: * Some OS's may not have this.
112: */
113: #ifndef S_IRWXU
114: # define S_IRWXU 0000700 /* rwx for owner */
115: #endif /* S_IRWXU */
116:
117: /*
118: * These should be defined in <unistd.h> but not everyone has them.
119: */
120: #ifndef STDIN_FILENO
121: # define STDIN_FILENO 0
122: #endif
123: #ifndef STDOUT_FILENO
124: # define STDOUT_FILENO 1
125: #endif
126: #ifndef STDERR_FILENO
127: # define STDERR_FILENO 2
128: #endif
129:
130: /*
131: * These should be defined in <unistd.h> but not everyone has them.
132: */
133: #ifndef SEEK_SET
134: # define SEEK_SET 0
135: #endif
136: #ifndef SEEK_CUR
137: # define SEEK_CUR 1
138: #endif
139: #ifndef SEEK_END
140: # define SEEK_END 2
141: #endif
142:
143: /*
144: * BSD defines these in <sys/param.h> but others may not.
145: */
146: #ifndef MIN
147: # define MIN(a,b) (((a)<(b))?(a):(b))
148: #endif
149: #ifndef MAX
150: # define MAX(a,b) (((a)>(b))?(a):(b))
151: #endif
152:
153: /*
1.10 millert 154: * Simple isblank() macro and function for systems without it.
1.2 millert 155: */
156: #ifndef HAVE_ISBLANK
1.10 millert 157: int isblank __P((int));
1.2 millert 158: # define isblank(_x) ((_x) == ' ' || (_x) == '\t')
159: #endif
160:
161: /*
162: * Old BSD systems lack strchr(), strrchr(), memset() and memcpy()
163: */
164: #if !defined(HAVE_STRCHR) && !defined(strchr)
165: # define strchr(_s, _c) index(_s, _c)
166: #endif
167: #if !defined(HAVE_STRRCHR) && !defined(strrchr)
168: # define strrchr(_s, _c) rindex(_s, _c)
169: #endif
170: #if !defined(HAVE_MEMCPY) && !defined(memcpy)
171: # define memcpy(_d, _s, _n) (bcopy(_s, _d, _n))
172: #endif
173: #if !defined(HAVE_MEMSET) && !defined(memset)
174: # define memset(_s, _x, _n) (bzero(_s, _n))
175: #endif
176:
177: /*
178: * NCR's SVr4 has _innetgr(3) instead of innetgr(3) for some reason.
179: */
180: #ifdef HAVE__INNETGR
181: # define innetgr(n, h, u, d) (_innetgr(n, h, u, d))
182: # define HAVE_INNETGR 1
183: #endif /* HAVE__INNETGR */
1.1 millert 184:
185: /*
186: * On POSIX systems, O_NOCTTY is the default so some OS's may lack this define.
187: */
188: #ifndef O_NOCTTY
189: # define O_NOCTTY 0
190: #endif /* O_NOCTTY */
1.2 millert 191:
192: /*
193: * Emulate POSIX signals via sigvec(2)
194: */
195: #ifndef HAVE_SIGACTION
196: # define SA_ONSTACK SV_ONSTACK
197: # define SA_RESTART SV_INTERRUPT /* opposite effect */
198: # define SA_RESETHAND SV_RESETHAND
199: # define sa_handler sv_handler
200: # define sa_mask sv_mask
201: # define sa_flags sv_flags
202: typedef struct sigvec sigaction_t;
203: typedef int sigset_t;
204: int sigaction __P((int sig, const sigaction_t *act, sigaction_t *oact));
205: int sigemptyset __P((sigset_t *));
206: int sigfillset __P((sigset_t *));
207: int sigaddset __P((sigset_t *, int));
208: int sigdelset __P((sigset_t *, int));
209: int sigismember __P((sigset_t *, int));
210: int sigprocmask __P((int, const sigset_t *, sigset_t *));
211: #endif
212:
213: /*
214: * Extra sugar for POSIX signals to deal with the above emulation
215: * as well as the fact that SunOS has a SA_INTERRUPT flag.
216: */
217: #ifdef HAVE_SIGACTION
218: # ifndef HAVE_SIGACTION_T
219: typedef struct sigaction sigaction_t;
220: # endif
1.7 millert 221: # ifndef SA_INTERRUPT
1.2 millert 222: # define SA_INTERRUPT 0
223: # endif
1.7 millert 224: # ifndef SA_RESTART
1.2 millert 225: # define SA_RESTART 0
226: # endif
1.4 millert 227: #endif
228:
229: /*
1.8 millert 230: * If dirfd() does not exists, hopefully dd_fd does.
1.4 millert 231: */
1.8 millert 232: #if !defined(HAVE_DIRFD) && defined(HAVE_DD_FD)
233: # define dirfd(_d) ((_d)->dd_fd)
234: # define HAVE_DIRFD
235: #endif
236:
237: /*
238: * Define futimes() in terms of futimesat() if needed.
239: */
240: #if !defined(HAVE_FUTIMES) && defined(HAVE_FUTIMESAT)
241: # define futimes(_f, _tv) futimesat(_f, NULL, _tv)
242: # define HAVE_FUTIMES
1.2 millert 243: #endif
1.6 millert 244:
245: /*
246: * If we lack getprogname(), emulate with __progname if possible.
247: * Otherwise, add a prototype for use with our own getprogname.c.
248: */
249: #ifndef HAVE_GETPROGNAME
250: # ifdef HAVE___PROGNAME
251: extern const char *__progname;
252: # define getprogname() (__progname)
253: # else
254: const char *getprogname __P((void));
255: #endif /* HAVE___PROGNAME */
256: #endif /* !HAVE_GETPROGNAME */
1.8 millert 257:
258: #ifndef timespecclear
259: # define timespecclear(ts) (ts)->tv_sec = (ts)->tv_nsec = 0
260: #endif
261: #ifndef timespecisset
262: # define timespecisset(ts) ((ts)->tv_sec || (ts)->tv_nsec)
263: #endif
264: #ifndef timespecsub
265: # define timespecsub(minuend, subrahend, difference) \
266: do { \
267: (difference)->tv_sec = (minuend)->tv_sec - (subrahend)->tv_sec; \
268: (difference)->tv_nsec = (minuend)->tv_nsec - (subrahend)->tv_nsec; \
269: if ((difference)->tv_nsec < 0) { \
270: (difference)->tv_nsec += 1000000000L; \
271: (difference)->tv_sec--; \
272: } \
273: } while (0)
274: #endif
1.1 millert 275:
276: #endif /* _SUDO_COMPAT_H */
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