2 * Copyright (c) 2008-2014, Simon Schubert <2@0x2c.org>.
3 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
5 * This code is derived from software contributed to The DragonFly Project
6 * by Simon Schubert <2@0x2c.org>.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/param.h>
56 #define HOST_NAME_MAX 255
58 static char name[HOST_NAME_MAX+1];
59 static int initialized = 0;
65 if (config.mailname == NULL || !*config.mailname)
68 if (config.mailname[0] == '/') {
70 * If the mailname looks like an absolute path,
75 fp = fopen(config.mailname, "r");
79 s = fgets(name, sizeof(name), fp);
84 for (s = name; *s != 0 && (isalnum(*s) || strchr("_.-", *s)); ++s)
94 snprintf(name, sizeof(name), "%s", config.mailname);
100 if (gethostname(name, sizeof(name)) != 0)
103 * gethostname() is allowed to truncate name without NUL-termination
104 * and at the same time not return an error.
106 name[sizeof(name) - 1] = 0;
108 for (s = name; *s != 0 && (isalnum(*s) || strchr("_.-", *s)); ++s)
113 snprintf(name, sizeof(name), "unknown-hostname");
120 setlogident(const char *fmt, ...)
124 snprintf(tag, sizeof(tag), "%s", logident_base);
130 vsnprintf(sufx, sizeof(sufx), fmt, ap);
132 snprintf(tag, sizeof(tag), "%s[%s]", logident_base, sufx);
135 openlog(tag, 0, LOG_MAIL);
139 errlog(int exitcode, const char *fmt, ...)
143 char outs[ERRMSG_SIZE];
148 vsnprintf(outs, sizeof(outs), fmt, ap);
154 syslog(LOG_ERR, "%s: %m", outs);
155 fprintf(stderr, "%s: %s: %s\n", getprogname(), outs, strerror(oerrno));
157 syslog(LOG_ERR, "%m");
158 fprintf(stderr, "%s: %s\n", getprogname(), strerror(oerrno));
165 errlogx(int exitcode, const char *fmt, ...)
168 char outs[ERRMSG_SIZE];
173 vsnprintf(outs, sizeof(outs), fmt, ap);
178 syslog(LOG_ERR, "%s", outs);
179 fprintf(stderr, "%s: %s\n", getprogname(), outs);
181 syslog(LOG_ERR, "Unknown error");
182 fprintf(stderr, "%s: Unknown error\n", getprogname());
189 check_username(const char *name, uid_t ckuid)
195 pwd = getpwnam(name);
196 if (pwd == NULL || pwd->pw_uid != ckuid)
198 snprintf(username, sizeof(username), "%s", name);
208 if (check_username(getlogin(), useruid))
210 if (check_username(getenv("LOGNAME"), useruid))
212 if (check_username(getenv("USER"), useruid))
214 pwd = getpwuid(useruid);
215 if (pwd != NULL && pwd->pw_name != NULL && pwd->pw_name[0] != '\0') {
216 if (check_username(pwd->pw_name, useruid))
219 snprintf(username, sizeof(username), "uid=%ld", (long)useruid);
227 SLIST_FOREACH(t, &tmpfs, next) {
232 static sigjmp_buf sigbuf;
233 static int sigbuf_valid;
236 sigalrm_handler(int signo)
238 (void)signo; /* so that gcc doesn't complain */
240 siglongjmp(sigbuf, 1);
244 do_timeout(int timeout, int dojmp)
246 struct sigaction act;
249 sigemptyset(&act.sa_mask);
253 act.sa_handler = sigalrm_handler;
254 if (sigaction(SIGALRM, &act, NULL) != 0)
255 syslog(LOG_WARNING, "can not set signal handler: %m");
257 ret = sigsetjmp(sigbuf, 1);
260 /* else just programmed */
269 act.sa_handler = SIG_IGN;
270 if (sigaction(SIGALRM, &act, NULL) != 0)
271 syslog(LOG_WARNING, "can not remove signal handler: %m");
279 open_locked(const char *fname, int flags, ...)
283 if (flags & O_CREAT) {
286 mode = va_arg(ap, int);
293 fd = open(fname, flags, mode);
296 if (flock(fd, LOCK_EX|((flags & O_NONBLOCK)? LOCK_NB: 0)) < 0) {
304 return(open(fname, flags|O_EXLOCK, mode));
316 error = strftime(str, sizeof(str), "%a, %d %b %Y %T %z",
319 strcpy(str, "(date fail)");
324 strprefixcmp(const char *str, const char *prefix)
326 return (strncasecmp(str, prefix, strlen(prefix)));
335 rf = open("/dev/urandom", O_RDONLY);
337 rf = open("/dev/random", O_RDONLY);
339 if (!(rf != -1 && read(rf, &seed, sizeof(seed)) == sizeof(seed)))
340 seed = (time(NULL) ^ getpid()) + (uintptr_t)&seed;