]>
git.ipfire.org Git - people/ms/dma.git/blob - util.c
2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Simon 'corecode' Schubert <corecode@fs.ei.tum.de>.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/param.h>
54 static char name
[HOST_NAME_MAX
+1];
55 static int initialized
= 0;
60 if (config
.mailname
== NULL
|| !*config
.mailname
)
63 if (config
.mailname
[0] == '/') {
65 * If the mailname looks like an absolute path,
71 fp
= fopen(config
.mailname
, "r");
75 res
= fgets(name
, sizeof(name
), fp
);
80 while (*res
!= 0 && !isspace(*res
))
90 snprintf(name
, sizeof(name
), "%s", config
.mailname
);
96 if (gethostname(name
, sizeof(name
)) != 0)
97 strcpy(name
, "(unknown hostname)");
99 * gethostname() is allowed to truncate name without NUL-termination
100 * and at the same time not return an error.
102 name
[sizeof(name
) - 1] = 0;
108 setlogident(const char *fmt
, ...)
112 snprintf(tag
, sizeof(tag
), "%s", logident_base
);
118 vsnprintf(sufx
, sizeof(sufx
), fmt
, ap
);
120 snprintf(tag
, sizeof(tag
), "%s[%s]", logident_base
, sufx
);
123 openlog(tag
, 0, LOG_MAIL
);
127 errlog(int exitcode
, const char *fmt
, ...)
131 char outs
[ERRMSG_SIZE
];
136 vsnprintf(outs
, sizeof(outs
), fmt
, ap
);
141 syslog(LOG_ERR
, "%s: %m", outs
);
142 fprintf(stderr
, "%s: %s: %s\n", getprogname(), outs
, strerror(oerrno
));
144 syslog(LOG_ERR
, "%m");
145 fprintf(stderr
, "%s: %s\n", getprogname(), strerror(oerrno
));
152 errlogx(int exitcode
, const char *fmt
, ...)
155 char outs
[ERRMSG_SIZE
];
160 vsnprintf(outs
, sizeof(outs
), fmt
, ap
);
165 syslog(LOG_ERR
, "%s", outs
);
166 fprintf(stderr
, "%s: %s\n", getprogname(), outs
);
168 syslog(LOG_ERR
, "Unknown error");
169 fprintf(stderr
, "%s: Unknown error\n", getprogname());
176 check_username(const char *name
, uid_t ckuid
)
182 pwd
= getpwnam(name
);
183 if (pwd
== NULL
|| pwd
->pw_uid
!= ckuid
)
185 snprintf(username
, sizeof(username
), "%s", name
);
196 if (check_username(getlogin(), uid
))
198 if (check_username(getenv("LOGNAME"), uid
))
200 if (check_username(getenv("USER"), uid
))
203 if (pwd
!= NULL
&& pwd
->pw_name
!= NULL
&& pwd
->pw_name
[0] != '\0') {
204 if (check_username(pwd
->pw_name
, uid
))
207 snprintf(username
, sizeof(username
), "uid=%ld", (long)uid
);
215 SLIST_FOREACH(t
, &tmpfs
, next
) {
220 static sigjmp_buf sigbuf
;
221 static int sigbuf_valid
;
224 sigalrm_handler(int signo
)
226 (void)signo
; /* so that gcc doesn't complain */
228 siglongjmp(sigbuf
, 1);
232 do_timeout(int timeout
, int dojmp
)
234 struct sigaction act
;
237 sigemptyset(&act
.sa_mask
);
241 act
.sa_handler
= sigalrm_handler
;
242 if (sigaction(SIGALRM
, &act
, NULL
) != 0)
243 syslog(LOG_WARNING
, "can not set signal handler: %m");
245 ret
= sigsetjmp(sigbuf
, 1);
248 /* else just programmed */
257 act
.sa_handler
= SIG_IGN
;
258 if (sigaction(SIGALRM
, &act
, NULL
) != 0)
259 syslog(LOG_WARNING
, "can not remove signal handler: %m");
267 open_locked(const char *fname
, int flags
, ...)
271 if (flags
& O_CREAT
) {
274 mode
= va_arg(ap
, int);
281 fd
= open(fname
, flags
, mode
);
284 if (flock(fd
, LOCK_EX
|((flags
& O_NONBLOCK
)? LOCK_NB
: 0)) < 0) {
292 return(open(fname
, flags
|O_EXLOCK
, mode
));
304 error
= strftime(str
, sizeof(str
), "%a, %d %b %Y %T %z",
307 strcpy(str
, "(date fail)");
312 strprefixcmp(const char *str
, const char *prefix
)
314 return (strncasecmp(str
, prefix
, strlen(prefix
)));
323 rf
= open("/dev/urandom", O_RDONLY
);
325 rf
= open("/dev/random", O_RDONLY
);
327 if (!(rf
!= -1 && read(rf
, &seed
, sizeof(seed
)) == sizeof(seed
)))
328 seed
= (time(NULL
) ^ getpid()) + (uintptr_t)&seed
;