1: /*
2: * Copyright (c) 1996, 1998-2005, 2008, 2009-2013
3: * Todd C. Miller <Todd.Miller@courtesan.com>
4: *
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.
8: *
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.
16: *
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.
20: */
21:
22: #ifndef _SUDO_MISSING_H
23: #define _SUDO_MISSING_H
24:
25: #include <stdio.h>
26: #ifdef STDC_HEADERS
27: # include <stddef.h>
28: #endif
29: #include <stdarg.h>
30:
31: /*
32: * Macros and functions that may be missing on some operating systems.
33: */
34:
35: #ifndef __GNUC_PREREQ__
36: # ifdef __GNUC__
37: # define __GNUC_PREREQ__(ma, mi) \
38: ((__GNUC__ > (ma)) || (__GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)))
39: # else
40: # define __GNUC_PREREQ__(ma, mi) 0
41: # endif
42: #endif
43:
44: /* Define away __attribute__ for non-gcc or old gcc */
45: #if !defined(__attribute__) && !__GNUC_PREREQ__(2, 5)
46: # define __attribute__(x)
47: #endif
48:
49: /* For catching format string mismatches */
50: #ifndef __printflike
51: # if __GNUC_PREREQ__(3, 3)
52: # define __printflike(f, v) __attribute__((__format__ (__printf__, f, v))) __attribute__((__nonnull__ (f)))
53: # elif __GNUC_PREREQ__(2, 7)
54: # define __printflike(f, v) __attribute__((__format__ (__printf__, f, v)))
55: # else
56: # define __printflike(f, v)
57: # endif
58: #endif
59: #ifndef __printf0like
60: # if __GNUC_PREREQ__(2, 7)
61: # define __printf0like(f, v) __attribute__((__format__ (__printf__, f, v)))
62: # else
63: # define __printf0like(f, v)
64: # endif
65: #endif
66:
67: /* Hint to compiler that returned pointer is unique (malloc but not realloc). */
68: #ifndef __malloc_like
69: # if __GNUC_PREREQ__(2, 96)
70: # define __malloc_like __attribute__((__malloc__))
71: # else
72: # define __malloc_like
73: # endif
74: #endif
75:
76: #ifndef __dso_public
77: # ifdef HAVE_DSO_VISIBILITY
78: # if defined(__GNUC__)
79: # define __dso_public __attribute__((__visibility__("default")))
80: # define __dso_hidden __attribute__((__visibility__("hidden")))
81: # elif defined(__SUNPRO_C)
82: # define __dso_public __global
83: # define __dso_hidden __hidden
84: # else
85: # define __dso_public __declspec(dllexport)
86: # define __dso_hidden
87: # endif
88: # else
89: # define __dso_public
90: # define __dso_hidden
91: # endif
92: #endif
93:
94: /*
95: * Some systems lack full limit definitions.
96: */
97: #ifndef OPEN_MAX
98: # define OPEN_MAX 256
99: #endif
100:
101: #ifndef INT_MAX
102: # define INT_MAX 0x7fffffff
103: #endif
104:
105: #ifndef PATH_MAX
106: # ifdef _POSIX_PATH_MAX
107: # define PATH_MAX _POSIX_PATH_MAX
108: # else
109: # define PATH_MAX 256
110: # endif
111: #endif
112:
113: #ifndef HOST_NAME_MAX
114: # ifdef _POSIX_HOST_NAME_MAX
115: # define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
116: # else
117: # define HOST_NAME_MAX 255
118: # endif
119: #endif
120:
121: /*
122: * Posix versions for those without...
123: */
124: #ifndef _S_IFMT
125: # define _S_IFMT S_IFMT
126: #endif /* _S_IFMT */
127: #ifndef _S_IFREG
128: # define _S_IFREG S_IFREG
129: #endif /* _S_IFREG */
130: #ifndef _S_IFDIR
131: # define _S_IFDIR S_IFDIR
132: #endif /* _S_IFDIR */
133: #ifndef _S_IFLNK
134: # define _S_IFLNK S_IFLNK
135: #endif /* _S_IFLNK */
136: #ifndef S_ISREG
137: # define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
138: #endif /* S_ISREG */
139: #ifndef S_ISDIR
140: # define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
141: #endif /* S_ISDIR */
142:
143: /*
144: * Some OS's may not have this.
145: */
146: #ifndef S_IRWXU
147: # define S_IRWXU 0000700 /* rwx for owner */
148: #endif /* S_IRWXU */
149:
150: /*
151: * These should be defined in <unistd.h> but not everyone has them.
152: */
153: #ifndef STDIN_FILENO
154: # define STDIN_FILENO 0
155: #endif
156: #ifndef STDOUT_FILENO
157: # define STDOUT_FILENO 1
158: #endif
159: #ifndef STDERR_FILENO
160: # define STDERR_FILENO 2
161: #endif
162:
163: /*
164: * BSD defines these in <sys/param.h> but we don't include that anymore.
165: */
166: #ifndef MIN
167: # define MIN(a,b) (((a)<(b))?(a):(b))
168: #endif
169: #ifndef MAX
170: # define MAX(a,b) (((a)>(b))?(a):(b))
171: #endif
172:
173: /* Macros to set/clear/test flags. */
174: #undef SET
175: #define SET(t, f) ((t) |= (f))
176: #undef CLR
177: #define CLR(t, f) ((t) &= ~(f))
178: #undef ISSET
179: #define ISSET(t, f) ((t) & (f))
180:
181: /*
182: * Some systems define this in <sys/param.h> but we don't include that anymore.
183: */
184: #ifndef howmany
185: # define howmany(x, y) (((x) + ((y) - 1)) / (y))
186: #endif
187:
188: /*
189: * Older systems may be missing stddef.h and/or offsetof macro
190: */
191: #ifndef offsetof
192: # ifdef __offsetof
193: # define offsetof(type, field) __offsetof(type, field)
194: # else
195: # define offsetof(type, field) ((size_t)(&((type *)0)->field))
196: # endif
197: #endif
198:
199: /*
200: * Simple isblank() macro and function for systems without it.
201: */
202: #ifndef HAVE_ISBLANK
203: int isblank(int);
204: # define isblank(_x) ((_x) == ' ' || (_x) == '\t')
205: #endif
206:
207: /*
208: * NCR's SVr4 has _innetgr(3) instead of innetgr(3) for some reason.
209: */
210: #ifdef HAVE__INNETGR
211: # define innetgr(n, h, u, d) (_innetgr(n, h, u, d))
212: # define HAVE_INNETGR 1
213: #endif /* HAVE__INNETGR */
214:
215: /*
216: * On POSIX systems, O_NOCTTY is the default so some OS's may lack this define.
217: */
218: #ifndef O_NOCTTY
219: # define O_NOCTTY 0
220: #endif /* O_NOCTTY */
221:
222: /*
223: * Add IRIX-like sigaction_t for those without it.
224: * SA_RESTART is not required by POSIX; SunOS has SA_INTERRUPT instead.
225: */
226: #ifndef HAVE_SIGACTION_T
227: typedef struct sigaction sigaction_t;
228: #endif
229: #ifndef SA_INTERRUPT
230: # define SA_INTERRUPT 0
231: #endif
232: #ifndef SA_RESTART
233: # define SA_RESTART 0
234: #endif
235:
236: /*
237: * If dirfd() does not exists, hopefully dd_fd does.
238: */
239: #if !defined(HAVE_DIRFD) && defined(HAVE_DD_FD)
240: # define dirfd(_d) ((_d)->dd_fd)
241: # define HAVE_DIRFD
242: #endif
243:
244: /*
245: * Define futimes() in terms of futimesat() if needed.
246: */
247: #if !defined(HAVE_FUTIMES) && defined(HAVE_FUTIMESAT)
248: # define futimes(_f, _tv) futimesat(_f, NULL, _tv)
249: # define HAVE_FUTIMES
250: #endif
251:
252: #if !defined(HAVE_KILLPG) && !defined(killpg)
253: # define killpg(s) kill(-(s))
254: #endif
255:
256: /*
257: * If we lack getprogname(), emulate with __progname if possible.
258: * Otherwise, add a prototype for use with our own getprogname.c.
259: */
260: #ifndef HAVE_GETPROGNAME
261: # ifdef HAVE___PROGNAME
262: extern const char *__progname;
263: # define getprogname() (__progname)
264: # else
265: const char *getprogname(void);
266: void setprogname(const char *);
267: # endif /* HAVE___PROGNAME */
268: #endif /* !HAVE_GETPROGNAME */
269:
270: /*
271: * Declare errno if errno.h doesn't do it for us.
272: */
273: #if defined(HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
274: extern int errno;
275: #endif /* !HAVE_DECL_ERRNO */
276:
277: #ifndef timevalclear
278: # define timevalclear(tv) ((tv)->tv_sec = (tv)->tv_usec = 0)
279: #endif
280: #ifndef timevalisset
281: # define timevalisset(tv) ((tv)->tv_sec || (tv)->tv_usec)
282: #endif
283: #ifndef timevalcmp
284: # define timevalcmp(tv1, tv2, op) \
285: (((tv1)->tv_sec == (tv2)->tv_sec) ? \
286: ((tv1)->tv_usec op (tv2)->tv_usec) : \
287: ((tv1)->tv_sec op (tv2)->tv_sec))
288: #endif
289: #ifndef timevaladd
290: # define timevaladd(tv1, tv2) \
291: do { \
292: (tv1)->tv_sec += (tv2)->tv_sec; \
293: (tv1)->tv_usec += (tv2)->tv_usec; \
294: if ((tv1)->tv_usec >= 1000000) { \
295: (tv1)->tv_sec++; \
296: (tv1)->tv_usec -= 1000000; \
297: } \
298: } while (0)
299: #endif
300: #ifndef timevalsub
301: # define timevalsub(tv1, tv2) \
302: do { \
303: (tv1)->tv_sec -= (tv2)->tv_sec; \
304: (tv1)->tv_usec -= (tv2)->tv_usec; \
305: if ((tv1)->tv_usec < 0) { \
306: (tv1)->tv_sec--; \
307: (tv1)->tv_usec += 1000000; \
308: } \
309: } while (0)
310: #endif
311:
312: /* Not all systems define NSIG in signal.h */
313: #if !defined(NSIG)
314: # if defined(_NSIG)
315: # define NSIG _NSIG
316: # elif defined(__NSIG)
317: # define NSIG __NSIG
318: # else
319: # define NSIG 64
320: # endif
321: #endif
322:
323: /* For sig2str() */
324: #ifndef SIG2STR_MAX
325: # define SIG2STR_MAX 32
326: #endif
327:
328: #ifndef WCOREDUMP
329: # define WCOREDUMP(x) ((x) & 0x80)
330: #endif
331:
332: #ifndef HAVE_SETEUID
333: # if defined(HAVE_SETRESUID)
334: # define seteuid(u) setresuid(-1, (u), -1)
335: # define setegid(g) setresgid(-1, (g), -1)
336: # define HAVE_SETEUID 1
337: # elif defined(HAVE_SETREUID)
338: # define seteuid(u) setreuid(-1, (u))
339: # define setegid(g) setregid(-1, (g))
340: # define HAVE_SETEUID 1
341: # endif
342: #endif /* HAVE_SETEUID */
343:
344: /*
345: * HP-UX does not declare innetgr() or getdomainname().
346: * Solaris does not declare getdomainname().
347: */
348: #if defined(__hpux)
349: int innetgr(const char *, const char *, const char *, const char *);
350: #endif
351: #if defined(__hpux) || defined(__sun)
352: int getdomainname(char *, size_t);
353: #endif
354:
355: /* Functions "missing" from libc. */
356:
357: struct timeval;
358: struct timespec;
359:
360: #ifndef HAVE_CLOSEFROM
361: void closefrom(int);
362: #endif
363: #ifndef HAVE_GETCWD
364: char *getcwd(char *, size_t size);
365: #endif
366: #ifndef HAVE_GETGROUPLIST
367: int getgrouplist(const char *, gid_t, gid_t *, int *);
368: #endif
369: #ifndef HAVE_GETLINE
370: ssize_t getline(char **, size_t *, FILE *);
371: #endif
372: #ifndef HAVE_UTIMES
373: int utimes(const char *, const struct timeval *);
374: #endif
375: #ifdef HAVE_FUTIME
376: int futimes(int, const struct timeval *);
377: #endif
378: #ifndef HAVE_SNPRINTF
379: int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
380: #endif
381: #ifndef HAVE_VSNPRINTF
382: int vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
383: #endif
384: #ifndef HAVE_ASPRINTF
385: int asprintf(char **, const char *, ...) __printflike(2, 3);
386: #endif
387: #ifndef HAVE_VASPRINTF
388: int vasprintf(char **, const char *, va_list) __printflike(2, 0);
389: #endif
390: #ifndef HAVE_STRLCAT
391: size_t strlcat(char *, const char *, size_t);
392: #endif
393: #ifndef HAVE_STRLCPY
394: size_t strlcpy(char *, const char *, size_t);
395: #endif
396: #ifndef HAVE_MEMRCHR
397: void *memrchr(const void *, int, size_t);
398: #endif
399: #ifndef HAVE_MEMSET_S
400: errno_t memset_s(void *, rsize_t, int, rsize_t);
401: #endif
402: #ifndef HAVE_MKDTEMP
403: char *mkdtemp(char *);
404: #endif
405: #ifndef HAVE_MKSTEMPS
406: int mkstemps(char *, int);
407: #endif
408: #ifndef HAVE_NANOSLEEP
409: int nanosleep(const struct timespec *, struct timespec *);
410: #endif
411: #ifndef HAVE_PW_DUP
412: struct passwd *pw_dup(const struct passwd *);
413: #endif
414: #ifndef HAVE_SETENV
415: int setenv(const char *, const char *, int);
416: #endif
417: #ifndef HAVE_UNSETENV
418: int unsetenv(const char *);
419: #endif
420: #ifndef HAVE_STRSIGNAL
421: char *strsignal(int);
422: #endif
423: #ifndef HAVE_SIG2STR
424: int sig2str(int, char *);
425: #endif
426:
427: #endif /* _SUDO_MISSING_H */
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