1: /*
2: * Copyright (c) 1996, 1998-2005, 2008, 2009-2014
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: #ifndef __format_arg
67: # if __GNUC_PREREQ__(2, 7)
68: # define __format_arg(f) __attribute__((__format_arg__ (f)))
69: # else
70: # define __format_arg(f)
71: # endif
72: #endif
73:
74: /* Hint to compiler that returned pointer is unique (malloc but not realloc). */
75: #ifndef __malloc_like
76: # if __GNUC_PREREQ__(2, 96)
77: # define __malloc_like __attribute__((__malloc__))
78: # else
79: # define __malloc_like
80: # endif
81: #endif
82:
83: /*
84: * Given the pointer x to the member m of the struct s, return
85: * a pointer to the containing structure.
86: */
87: #ifndef __containerof
88: # define __containerof(x, s, m) ((s *)((char *)(x) - offsetof(s, m)))
89: #endif
90:
91: #ifndef __dso_public
92: # ifdef HAVE_DSO_VISIBILITY
93: # if defined(__GNUC__)
94: # define __dso_public __attribute__((__visibility__("default")))
95: # define __dso_hidden __attribute__((__visibility__("hidden")))
96: # elif defined(__SUNPRO_C)
97: # define __dso_public __global
98: # define __dso_hidden __hidden
99: # else
100: # define __dso_public __declspec(dllexport)
101: # define __dso_hidden
102: # endif
103: # else
104: # define __dso_public
105: # define __dso_hidden
106: # endif
107: #endif
108:
109: /*
110: * Pre-C99 compilers may lack a va_copy macro.
111: */
112: #ifndef va_copy
113: # ifdef __va_copy
114: # define va_copy(d, s) __va_copy(d, s)
115: # else
116: # define va_copy(d, s) memcpy(&(d), &(s), sizeof(d));
117: # endif
118: #endif
119:
120: /*
121: * Some systems lack full limit definitions.
122: */
123: #ifndef OPEN_MAX
124: # define OPEN_MAX 256
125: #endif
126:
127: #ifndef LLONG_MAX
128: # if defined(QUAD_MAX)
129: # define LLONG_MAX QUAD_MAX
130: # else
131: # define LLONG_MAX 0x7fffffffffffffffLL
132: # endif
133: #endif
134:
135: #ifndef LLONG_MIN
136: # if defined(QUAD_MIN)
137: # define LLONG_MIN QUAD_MIN
138: # else
139: # define LLONG_MIN (-0x7fffffffffffffffLL-1)
140: # endif
141: #endif
142:
143: #ifndef ULLONG_MAX
144: # if defined(UQUAD_MAX)
145: # define ULLONG_MAX UQUAD_MAX
146: # else
147: # define ULLONG_MAX 0xffffffffffffffffULL
148: # endif
149: #endif
150:
151: #ifndef PATH_MAX
152: # ifdef _POSIX_PATH_MAX
153: # define PATH_MAX _POSIX_PATH_MAX
154: # else
155: # define PATH_MAX 256
156: # endif
157: #endif
158:
159: #ifndef HOST_NAME_MAX
160: # ifdef _POSIX_HOST_NAME_MAX
161: # define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
162: # else
163: # define HOST_NAME_MAX 255
164: # endif
165: #endif
166:
167: /*
168: * Posix versions for those without...
169: */
170: #ifndef _S_IFMT
171: # define _S_IFMT S_IFMT
172: #endif /* _S_IFMT */
173: #ifndef _S_IFREG
174: # define _S_IFREG S_IFREG
175: #endif /* _S_IFREG */
176: #ifndef _S_IFDIR
177: # define _S_IFDIR S_IFDIR
178: #endif /* _S_IFDIR */
179: #ifndef _S_IFLNK
180: # define _S_IFLNK S_IFLNK
181: #endif /* _S_IFLNK */
182: #ifndef S_ISREG
183: # define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
184: #endif /* S_ISREG */
185: #ifndef S_ISDIR
186: # define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
187: #endif /* S_ISDIR */
188:
189: /*
190: * Some OS's may not have this.
191: */
192: #ifndef S_IRWXU
193: # define S_IRWXU 0000700 /* rwx for owner */
194: #endif /* S_IRWXU */
195:
196: /*
197: * These should be defined in <unistd.h> but not everyone has them.
198: */
199: #ifndef STDIN_FILENO
200: # define STDIN_FILENO 0
201: #endif
202: #ifndef STDOUT_FILENO
203: # define STDOUT_FILENO 1
204: #endif
205: #ifndef STDERR_FILENO
206: # define STDERR_FILENO 2
207: #endif
208:
209: /*
210: * BSD defines these in <sys/param.h> but we don't include that anymore.
211: */
212: #ifndef MIN
213: # define MIN(a,b) (((a)<(b))?(a):(b))
214: #endif
215: #ifndef MAX
216: # define MAX(a,b) (((a)>(b))?(a):(b))
217: #endif
218:
219: /* Macros to set/clear/test flags. */
220: #undef SET
221: #define SET(t, f) ((t) |= (f))
222: #undef CLR
223: #define CLR(t, f) ((t) &= ~(f))
224: #undef ISSET
225: #define ISSET(t, f) ((t) & (f))
226:
227: /*
228: * Older systems may be missing stddef.h and/or offsetof macro
229: */
230: #ifndef offsetof
231: # ifdef __offsetof
232: # define offsetof(type, field) __offsetof(type, field)
233: # else
234: # define offsetof(type, field) ((size_t)(&((type *)0)->field))
235: # endif
236: #endif
237:
238: /*
239: * Simple isblank() macro and function for systems without it.
240: */
241: #ifndef HAVE_ISBLANK
242: int isblank(int);
243: # define isblank(_x) ((_x) == ' ' || (_x) == '\t')
244: #endif
245:
246: /*
247: * NCR's SVr4 has _innetgr(3) instead of innetgr(3) for some reason.
248: */
249: #ifdef HAVE__INNETGR
250: # define innetgr(n, h, u, d) (_innetgr(n, h, u, d))
251: # define HAVE_INNETGR 1
252: #endif /* HAVE__INNETGR */
253:
254: /*
255: * On POSIX systems, O_NOCTTY is the default so some OS's may lack this define.
256: */
257: #ifndef O_NOCTTY
258: # define O_NOCTTY 0
259: #endif /* O_NOCTTY */
260:
261: /*
262: * Add IRIX-like sigaction_t for those without it.
263: * SA_RESTART is not required by POSIX; SunOS has SA_INTERRUPT instead.
264: */
265: #ifndef HAVE_SIGACTION_T
266: typedef struct sigaction sigaction_t;
267: #endif
268: #ifndef SA_INTERRUPT
269: # define SA_INTERRUPT 0
270: #endif
271: #ifndef SA_RESTART
272: # define SA_RESTART 0
273: #endif
274:
275: /*
276: * If dirfd() does not exists, hopefully dd_fd does.
277: */
278: #if !defined(HAVE_DIRFD) && defined(HAVE_DD_FD)
279: # define dirfd(_d) ((_d)->dd_fd)
280: # define HAVE_DIRFD
281: #endif
282:
283: /*
284: * Define futimes() in terms of futimesat() if needed.
285: */
286: #if !defined(HAVE_FUTIMES) && defined(HAVE_FUTIMESAT)
287: # define futimes(_f, _tv) futimesat(_f, NULL, _tv)
288: # define HAVE_FUTIMES
289: #endif
290:
291: #if !defined(HAVE_KILLPG) && !defined(killpg)
292: # define killpg(s) kill(-(s))
293: #endif
294:
295: /*
296: * If we lack getprogname(), emulate with __progname if possible.
297: * Otherwise, add a prototype for use with our own getprogname.c.
298: */
299: #ifndef HAVE_GETPROGNAME
300: # ifdef HAVE___PROGNAME
301: extern const char *__progname;
302: # define getprogname() (__progname)
303: # else
304: const char *getprogname(void);
305: # endif /* HAVE___PROGNAME */
306: #endif /* !HAVE_GETPROGNAME */
307:
308: /*
309: * Declare errno if errno.h doesn't do it for us.
310: */
311: #if defined(HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
312: extern int errno;
313: #endif /* !HAVE_DECL_ERRNO */
314:
315: /* Not all systems define NSIG in signal.h */
316: #if !defined(NSIG)
317: # if defined(_NSIG)
318: # define NSIG _NSIG
319: # elif defined(__NSIG)
320: # define NSIG __NSIG
321: # else
322: # define NSIG 64
323: # endif
324: #endif
325:
326: /* For sig2str() */
327: #ifndef SIG2STR_MAX
328: # define SIG2STR_MAX 32
329: #endif
330:
331: #ifndef WCOREDUMP
332: # define WCOREDUMP(x) ((x) & 0x80)
333: #endif
334:
335: #ifndef HAVE_SETEUID
336: # if defined(HAVE_SETRESUID)
337: # define seteuid(u) setresuid(-1, (u), -1)
338: # define setegid(g) setresgid(-1, (g), -1)
339: # define HAVE_SETEUID 1
340: # elif defined(HAVE_SETREUID)
341: # define seteuid(u) setreuid(-1, (u))
342: # define setegid(g) setregid(-1, (g))
343: # define HAVE_SETEUID 1
344: # endif
345: #endif /* HAVE_SETEUID */
346:
347: /*
348: * HP-UX does not declare innetgr() or getdomainname().
349: * Solaris does not declare getdomainname().
350: */
351: #if defined(__hpux)
352: int innetgr(const char *, const char *, const char *, const char *);
353: #endif
354: #if defined(__hpux) || defined(__sun)
355: int getdomainname(char *, size_t);
356: #endif
357:
358: /* Functions "missing" from libc. */
359:
360: struct timeval;
361: struct timespec;
362:
363: #ifndef HAVE_CLOSEFROM
364: void closefrom(int);
365: #endif
366: #ifndef HAVE_GETCWD
367: char *getcwd(char *, size_t size);
368: #endif
369: #ifndef HAVE_GETGROUPLIST
370: int getgrouplist(const char *, gid_t, gid_t *, int *);
371: #endif
372: #ifndef HAVE_GETLINE
373: ssize_t getline(char **, size_t *, FILE *);
374: #endif
375: #ifndef HAVE_UTIMES
376: int utimes(const char *, const struct timeval *);
377: #endif
378: #ifdef HAVE_FUTIME
379: int futimes(int, const struct timeval *);
380: #endif
381: #if !defined(HAVE_SNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
382: int rpl_snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
383: # undef snprintf
384: # define snprintf rpl_snprintf
385: #endif
386: #if !defined(HAVE_VSNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
387: int rpl_vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
388: # undef vsnprintf
389: # define vsnprintf rpl_vsnprintf
390: #endif
391: #if !defined(HAVE_ASPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
392: int rpl_asprintf(char **, const char *, ...) __printflike(2, 3);
393: # undef asprintf
394: # define asprintf rpl_asprintf
395: #endif
396: #if !defined(HAVE_VASPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
397: int rpl_vasprintf(char **, const char *, va_list) __printflike(2, 0);
398: # undef vasprintf
399: # define vasprintf rpl_vasprintf
400: #endif
401: #ifndef HAVE_STRLCAT
402: size_t strlcat(char *, const char *, size_t);
403: #endif
404: #ifndef HAVE_STRLCPY
405: size_t strlcpy(char *, const char *, size_t);
406: #endif
407: #ifndef HAVE_MEMRCHR
408: void *memrchr(const void *, int, size_t);
409: #endif
410: #ifndef HAVE_MEMSET_S
411: errno_t memset_s(void *, rsize_t, int, rsize_t);
412: #endif
413: #ifndef HAVE_MKDTEMP
414: char *mkdtemp(char *);
415: #endif
416: #ifndef HAVE_MKSTEMPS
417: int mkstemps(char *, int);
418: #endif
419: #ifndef HAVE_PW_DUP
420: struct passwd *pw_dup(const struct passwd *);
421: #endif
422: #ifndef HAVE_SETENV
423: int setenv(const char *, const char *, int);
424: #endif
425: #ifndef HAVE_UNSETENV
426: int unsetenv(const char *);
427: #endif
428: #ifndef HAVE_STRSIGNAL
429: char *strsignal(int);
430: #endif
431: #ifndef HAVE_SIG2STR
432: int sig2str(int, char *);
433: #endif
434: #ifndef HAVE_STRTONUM
435: long long rpl_strtonum(const char *, long long, long long, const char **);
436: # undef strtonum
437: # define strtonum rpl_strtonum
438: #endif
439: #ifndef HAVE_CLOCK_GETTIME
440: # define CLOCK_REALTIME 0
441: # ifdef __MACH__
442: # define CLOCK_MONOTONIC 1
443: # endif
444: int clock_gettime(clockid_t clock_id, struct timespec *tp);
445: #endif
446: #ifndef HAVE_INET_PTON
447: int inet_pton(int af, const char *src, void *dst);
448: #endif
449:
450: #endif /* _SUDO_MISSING_H */
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