1 /*
2  * Copyright (c) 1999-2003 Damien Miller.  All rights reserved.
3  * Copyright (c) 2003 Ben Lindstrom. All rights reserved.
4  * Copyright (c) 2002 Tim Rice.  All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #ifndef _OPENBSD_COMPAT_H
28 #define _OPENBSD_COMPAT_H
29 
30 #include "includes.h"
31 
32 #include <sys/types.h>
33 #include <pwd.h>
34 
35 #include <sys/socket.h>
36 
37 #include "getrrsetbyname.h"
38 #include "blf.h"
39 #include "fnmatch.h"
40 
41 #if defined(HAVE_LOGIN_CAP) && !defined(HAVE_LOGIN_GETPWCLASS)
42 # include <login_cap.h>
43 # define login_getpwclass(pw) login_getclass(pw->pw_class)
44 #endif
45 
46 #ifndef HAVE_BASENAME
47 char *basename(const char *path);
48 #endif
49 
50 #ifndef HAVE_BINDRESVPORT_SA
51 int bindresvport_sa(int sd, struct sockaddr *sa);
52 #endif
53 
54 #ifndef HAVE_CLOSEFROM
55 void closefrom(int);
56 #endif
57 
58 #if defined(HAVE_DECL_FTRUNCATE) && HAVE_DECL_FTRUNCATE == 0
59 int ftruncate(int filedes, off_t length);
60 #endif
61 
62 #if defined(HAVE_DECL_GETENTROPY) && HAVE_DECL_GETENTROPY == 0
63 int _ssh_compat_getentropy(void *, size_t);
64 #endif
65 
66 #ifndef HAVE_GETLINE
67 #include <stdio.h>
68 ssize_t getline(char **, size_t *, FILE *);
69 #endif
70 
71 #ifndef HAVE_GETPAGESIZE
72 int getpagesize(void);
73 #endif
74 
75 #ifndef HAVE_GETCWD
76 char *getcwd(char *pt, size_t size);
77 #endif
78 
79 #ifndef HAVE_KILLPG
80 int killpg(pid_t, int);
81 #endif
82 
83 #if defined(HAVE_DECL_MEMMEM) && HAVE_DECL_MEMMEM == 0
84 void *memmem(const void *, size_t, const void *, size_t);
85 #endif
86 
87 #ifndef HAVE_REALLOCARRAY
88 void *reallocarray(void *, size_t, size_t);
89 #endif
90 
91 #ifndef HAVE_RECALLOCARRAY
92 void *recallocarray(void *, size_t, size_t, size_t);
93 #endif
94 
95 #ifndef HAVE_RRESVPORT_AF
96 int rresvport_af(int *alport, sa_family_t af);
97 #endif
98 
99 #ifndef HAVE_STRLCPY
100 size_t strlcpy(char *dst, const char *src, size_t siz);
101 #endif
102 
103 #ifndef HAVE_STRLCAT
104 size_t strlcat(char *dst, const char *src, size_t siz);
105 #endif
106 
107 #ifndef HAVE_STRCASESTR
108 char *strcasestr(const char *, const char *);
109 #endif
110 
111 #ifndef HAVE_STRNLEN
112 size_t strnlen(const char *, size_t);
113 #endif
114 
115 #ifndef HAVE_STRNDUP
116 char *strndup(const char *s, size_t n);
117 #endif
118 
119 #ifndef HAVE_SETENV
120 int setenv(register const char *name, register const char *value, int rewrite);
121 #endif
122 
123 #ifndef HAVE_STRMODE
124 void strmode(int mode, char *p);
125 #endif
126 
127 #ifndef HAVE_STRPTIME
128 #include  <time.h>
129 char *strptime(const char *buf, const char *fmt, struct tm *tm);
130 #endif
131 
132 #if !defined(HAVE_MKDTEMP)
133 int mkstemps(char *path, int slen);
134 int mkstemp(char *path);
135 char *mkdtemp(char *path);
136 #endif
137 
138 #ifndef HAVE_DAEMON
139 int daemon(int nochdir, int noclose);
140 #endif
141 
142 #ifndef HAVE_DIRNAME
143 char *dirname(const char *path);
144 #endif
145 
146 #ifndef HAVE_FMT_SCALED
147 #define	FMT_SCALED_STRSIZE	7
148 int	fmt_scaled(long long number, char *result);
149 #endif
150 
151 #ifndef HAVE_SCAN_SCALED
152 int	scan_scaled(char *, long long *);
153 #endif
154 
155 #if defined(BROKEN_INET_NTOA) || !defined(HAVE_INET_NTOA)
156 char *inet_ntoa(struct in_addr in);
157 #endif
158 
159 #ifndef HAVE_INET_NTOP
160 const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
161 #endif
162 
163 #ifndef HAVE_INET_ATON
164 int inet_aton(const char *cp, struct in_addr *addr);
165 #endif
166 
167 #ifndef HAVE_STRSEP
168 char *strsep(char **stringp, const char *delim);
169 #endif
170 
171 #ifndef HAVE_SETPROCTITLE
172 void setproctitle(const char *fmt, ...);
173 void compat_init_setproctitle(int argc, char *argv[]);
174 #endif
175 
176 #ifndef HAVE_GETGROUPLIST
177 int getgrouplist(const char *, gid_t, gid_t *, int *);
178 #endif
179 
180 #if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET)
181 int BSDgetopt(int argc, char * const *argv, const char *opts);
182 #include "openbsd-compat/getopt.h"
183 #endif
184 
185 #if ((defined(HAVE_DECL_READV) && HAVE_DECL_READV == 0) || \
186     (defined(HAVE_DECL_WRITEV) && HAVE_DECL_WRITEV == 0))
187 # include <sys/types.h>
188 # include <sys/uio.h>
189 
190 # if defined(HAVE_DECL_READV) && HAVE_DECL_READV == 0
191 int readv(int, struct iovec *, int);
192 # endif
193 
194 # if defined(HAVE_DECL_WRITEV) && HAVE_DECL_WRITEV == 0
195 int writev(int, struct iovec *, int);
196 # endif
197 #endif
198 
199 /* Home grown routines */
200 #include "bsd-signal.h"
201 #include "bsd-misc.h"
202 
203 #if defined(HAVE_DECL_GETPEEREID) && HAVE_DECL_GETPEEREID == 0
204 int getpeereid(int , uid_t *, gid_t *);
205 #endif
206 
207 #ifndef HAVE_ARC4RANDOM
208 uint32_t arc4random(void);
209 #endif /* !HAVE_ARC4RANDOM */
210 
211 #ifndef HAVE_ARC4RANDOM_BUF
212 void arc4random_buf(void *, size_t);
213 #endif
214 
215 #ifndef HAVE_ARC4RANDOM_STIR
216 # define arc4random_stir()
217 #endif
218 
219 #ifndef HAVE_ARC4RANDOM_UNIFORM
220 uint32_t arc4random_uniform(uint32_t);
221 #endif
222 
223 #ifndef HAVE_ASPRINTF
224 int asprintf(char **, const char *, ...);
225 #endif
226 
227 #ifndef HAVE_OPENPTY
228 # include <sys/ioctl.h>	/* for struct winsize */
229 int openpty(int *, int *, char *, struct termios *, struct winsize *);
230 #endif /* HAVE_OPENPTY */
231 
232 #ifndef HAVE_SNPRINTF
233 int snprintf(char *, size_t, SNPRINTF_CONST char *, ...);
234 #endif
235 
236 #ifndef HAVE_STRTOLL
237 long long strtoll(const char *, char **, int);
238 #endif
239 
240 #ifndef HAVE_STRTOUL
241 unsigned long strtoul(const char *, char **, int);
242 #endif
243 
244 #ifndef HAVE_STRTOULL
245 unsigned long long strtoull(const char *, char **, int);
246 #endif
247 
248 #ifndef HAVE_STRTONUM
249 long long strtonum(const char *, long long, long long, const char **);
250 #endif
251 
252 /* multibyte character support */
253 #ifndef HAVE_MBLEN
254 # define mblen(x, y)	(1)
255 #endif
256 
257 #ifndef HAVE_WCWIDTH
258 # define wcwidth(x)	(((x) >= 0x20 && (x) <= 0x7e) ? 1 : -1)
259 /* force our no-op nl_langinfo and mbtowc */
260 # undef HAVE_NL_LANGINFO
261 # undef HAVE_MBTOWC
262 # undef HAVE_LANGINFO_H
263 #endif
264 
265 #ifndef HAVE_NL_LANGINFO
266 # define nl_langinfo(x)	""
267 #endif
268 
269 #ifndef HAVE_MBTOWC
270 int mbtowc(wchar_t *, const char*, size_t);
271 #endif
272 
273 #if !defined(HAVE_VASPRINTF) || !defined(HAVE_VSNPRINTF)
274 # include <stdarg.h>
275 #endif
276 
277 /*
278  * Some platforms unconditionally undefine va_copy() so we define VA_COPY()
279  * instead.  This is known to be the case on at least some configurations of
280  * AIX with the xlc compiler.
281  */
282 #ifndef VA_COPY
283 # ifdef HAVE_VA_COPY
284 #  define VA_COPY(dest, src) va_copy(dest, src)
285 # else
286 #  ifdef HAVE___VA_COPY
287 #   define VA_COPY(dest, src) __va_copy(dest, src)
288 #  else
289 #   define VA_COPY(dest, src) (dest) = (src)
290 #  endif
291 # endif
292 #endif
293 
294 #ifndef HAVE_VASPRINTF
295 int vasprintf(char **, const char *, va_list);
296 #endif
297 
298 #ifndef HAVE_VSNPRINTF
299 int vsnprintf(char *, size_t, const char *, va_list);
300 #endif
301 
302 #ifndef HAVE_USER_FROM_UID
303 char *user_from_uid(uid_t, int);
304 #endif
305 
306 #ifndef HAVE_GROUP_FROM_GID
307 char *group_from_gid(gid_t, int);
308 #endif
309 
310 #ifndef HAVE_TIMINGSAFE_BCMP
311 int timingsafe_bcmp(const void *, const void *, size_t);
312 #endif
313 
314 #ifndef HAVE_BCRYPT_PBKDF
315 int	bcrypt_pbkdf(const char *, size_t, const uint8_t *, size_t,
316     uint8_t *, size_t, unsigned int);
317 #endif
318 
319 #ifndef HAVE_EXPLICIT_BZERO
320 void explicit_bzero(void *p, size_t n);
321 #endif
322 
323 #ifndef HAVE_FREEZERO
324 void freezero(void *, size_t);
325 #endif
326 
327 #ifndef HAVE_LOCALTIME_R
328 struct tm *localtime_r(const time_t *, struct tm *);
329 #endif
330 
331 #ifndef HAVE_TIMEGM
332 time_t timegm(struct tm *);
333 #endif
334 
335 char *xcrypt(const char *password, const char *salt);
336 char *shadow_pw(struct passwd *pw);
337 
338 /* _FORTIFY_SOURCE breaks FD_ISSET(n)/FD_SET(n) for n > FD_SETSIZE. Avoid. */
339 #if defined(HAVE_FEATURES_H) && defined(_FORTIFY_SOURCE)
340 # include <features.h>
341 # if defined(__GNU_LIBRARY__) && defined(__GLIBC_PREREQ)
342 #  if __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0)
343 #   include <sys/socket.h>  /* Ensure include guard is defined */
344 #   undef FD_SET
345 #   undef FD_ISSET
346 #   define FD_SET(n, set)	kludge_FD_SET(n, set)
347 #   define FD_ISSET(n, set)	kludge_FD_ISSET(n, set)
348 void kludge_FD_SET(int, fd_set *);
349 int kludge_FD_ISSET(int, fd_set *);
350 #  endif /* __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) */
351 # endif /* __GNU_LIBRARY__ && __GLIBC_PREREQ */
352 #endif /* HAVE_FEATURES_H && _FORTIFY_SOURCE */
353 
354 #endif /* _OPENBSD_COMPAT_H */
355