Commit | Line | Data |
---|---|---|
410c8acf | 1 | /* -*-c-*- |
410c8acf | 2 | * |
3 | * Client for TrIPE | |
4 | * | |
5 | * (c) 2001 Straylight/Edgeware | |
6 | */ | |
7 | ||
e04c2d50 | 8 | /*----- Licensing notice --------------------------------------------------* |
410c8acf | 9 | * |
10 | * This file is part of Trivial IP Encryption (TrIPE). | |
11 | * | |
12 | * TrIPE is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
e04c2d50 | 16 | * |
410c8acf | 17 | * TrIPE is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
e04c2d50 | 21 | * |
410c8acf | 22 | * You should have received a copy of the GNU General Public License |
23 | * along with TrIPE; if not, write to the Free Software Foundation, | |
24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
26 | ||
410c8acf | 27 | /*----- Header files ------------------------------------------------------*/ |
28 | ||
73189848 | 29 | #include "config.h" |
30 | ||
410c8acf | 31 | #include <ctype.h> |
32 | #include <errno.h> | |
33 | #include <signal.h> | |
34 | #include <stdio.h> | |
35 | #include <stdlib.h> | |
36 | #include <string.h> | |
37 | #include <time.h> | |
38 | ||
39 | #include <sys/types.h> | |
40 | #include <sys/time.h> | |
41 | #include <unistd.h> | |
42 | #include <fcntl.h> | |
43 | #include <sys/wait.h> | |
44 | #include <syslog.h> | |
45 | ||
46 | #include <sys/socket.h> | |
47 | #include <sys/un.h> | |
48 | #include <arpa/inet.h> | |
49 | #include <netdb.h> | |
50 | ||
51 | #include <mLib/alloc.h> | |
19dd2531 | 52 | #include <mLib/daemonize.h> |
410c8acf | 53 | #include <mLib/darray.h> |
54 | #include <mLib/dstr.h> | |
410c8acf | 55 | #include <mLib/mdwopt.h> |
56 | #include <mLib/quis.h> | |
57 | #include <mLib/report.h> | |
58 | #include <mLib/sel.h> | |
59 | #include <mLib/selbuf.h> | |
5f5150b1 | 60 | #include <mLib/sig.h> |
410c8acf | 61 | #include <mLib/str.h> |
19dd2531 | 62 | #include <mLib/versioncmp.h> |
410c8acf | 63 | |
64 | #include "util.h" | |
65 | ||
66 | #undef sun | |
67 | ||
68 | /*----- Data structures ---------------------------------------------------*/ | |
69 | ||
70 | #ifndef STRING_V | |
71 | # define STRING_V | |
72 | DA_DECL(string_v, char *); | |
73 | #endif | |
74 | ||
75 | /*----- Static variables --------------------------------------------------*/ | |
76 | ||
8efdf64b | 77 | static sel_state sel; |
06b2a088 | 78 | static const char *pidfile = 0; |
79 | static const char *logname = 0; | |
410c8acf | 80 | static FILE *logfp = 0; |
81 | static unsigned f = 0; | |
82 | static int fd; | |
de014da6 | 83 | static const char *bgtag = 0; |
410c8acf | 84 | |
85 | #define f_bogus 1u | |
86 | #define f_spawn 2u | |
87 | #define f_daemon 4u | |
88 | #define f_spawnopts 8u | |
89 | #define f_syslog 16u | |
90 | #define f_command 32u | |
91 | #define f_noinput 64u | |
92 | #define f_warn 128u | |
93 | #define f_uclose 256u | |
94 | ||
95 | /*----- Main code ---------------------------------------------------------*/ | |
96 | ||
97 | static void reap(int sig) | |
98 | { | |
410c8acf | 99 | int e = errno; |
06b2a088 | 100 | while (waitpid(-1, 0, WNOHANG) > 0) |
410c8acf | 101 | ; |
102 | errno = e; | |
103 | } | |
104 | ||
105 | static void writelog(const char *cat, const char *msg) | |
106 | { | |
107 | char buf[256]; | |
108 | time_t t = time(0); | |
109 | struct tm *tm = localtime(&t); | |
110 | strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm); | |
111 | fprintf(logfp, "%s %s: %s\n", buf, cat, msg); | |
112 | } | |
113 | ||
de014da6 | 114 | static void checkbg(char **p) |
115 | { | |
116 | char *q = str_getword(p); | |
117 | if (!q) | |
118 | die(EXIT_FAILURE, "missing background tag"); | |
119 | if (!bgtag || strcmp(bgtag, q) != 0) | |
120 | die(EXIT_FAILURE, "unexpected background tag `%s'", q); | |
121 | } | |
122 | ||
2b3ef395 MW |
123 | static void dolog(int prio, const char *msg, ...) |
124 | { | |
125 | va_list ap; | |
126 | dstr d = DSTR_INIT; | |
127 | const char *cat; | |
128 | ||
129 | va_start(ap, msg); | |
130 | dstr_vputf(&d, msg, &ap); | |
131 | va_end(ap); | |
132 | if (f & f_syslog) syslog(prio, "%s", d.buf); | |
133 | if (logfp) { | |
134 | switch (prio) { | |
135 | case LOG_WARN: cat = "warning"; break; | |
136 | case LOG_DEBUG: cat = "debug"; break; | |
137 | case LOG_ERR: cat = "error"; break; | |
138 | default: cat = "message"; break; | |
139 | } | |
140 | writelog(cat, d.buf); | |
141 | } | |
142 | if (prio == LOG_WARN && (f & f_warn)) | |
143 | fprintf(stderr, "Warning: %s\n", d.buf); | |
144 | dstr_destroy(&d); | |
145 | } | |
146 | ||
de014da6 | 147 | static void checkfg(void) |
6047fbac | 148 | { if (bgtag) die(EXIT_FAILURE, "unexpected foreground response"); } |
de014da6 | 149 | |
6be88c14 | 150 | static void cline(char *p, size_t len, void *b) |
410c8acf | 151 | { |
152 | char *q; | |
153 | if (!p) { | |
154 | if (f & f_command) | |
155 | die(EXIT_FAILURE, "server dropped the connection"); | |
156 | exit(0); | |
157 | } | |
158 | q = str_getword(&p); | |
159 | if (!q) | |
160 | return; | |
2b3ef395 MW |
161 | if (strcmp(q, "WARN") == 0) |
162 | dolog(LOG_WARNING, p); | |
163 | else if (strcmp(q, "TRACE") == 0) | |
164 | dolog(LOG_DEBUG, p); | |
165 | else if (!(f & f_command)) | |
166 | dolog(LOG_ERR, "unexpected output `%s %s'", q, p); | |
167 | else if (strcmp(q, "FAIL") == 0) { | |
de014da6 | 168 | checkfg(); |
410c8acf | 169 | die(EXIT_FAILURE, "%s", p); |
de014da6 | 170 | } else if (strcmp(q, "INFO") == 0) { |
171 | checkfg(); | |
410c8acf | 172 | puts(p); |
5136c31e | 173 | fflush(stdout); |
de014da6 | 174 | } else if (strcmp(q, "OK") == 0) { |
175 | checkfg(); | |
176 | exit(0); | |
177 | } else if (strcmp(q, "BGDETACH") == 0) { | |
178 | if (bgtag) | |
179 | die(EXIT_FAILURE, "repeat detach"); | |
180 | bgtag = xstrdup(p); | |
181 | } else if (strcmp(q, "BGOK") == 0) { | |
182 | checkbg(&p); | |
410c8acf | 183 | exit(0); |
de014da6 | 184 | } else if (strcmp(q, "BGINFO") == 0) { |
185 | checkbg(&p); | |
186 | puts(p); | |
5136c31e | 187 | fflush(stdout); |
de014da6 | 188 | } else if (strcmp(q, "BGFAIL") == 0) { |
189 | checkbg(&p); | |
190 | die(EXIT_FAILURE, "%s", p); | |
191 | } else | |
e04c2d50 | 192 | die(EXIT_FAILURE, "unexpected output `%s %s'", q, p); |
410c8acf | 193 | } |
194 | ||
6be88c14 | 195 | static void sline(char *p, size_t len, void *b) |
410c8acf | 196 | { |
197 | if (!p) { | |
198 | if (!(f & f_uclose)) | |
199 | moan("server closed the connection"); | |
200 | exit(0); | |
201 | } | |
202 | puts(p); | |
5136c31e | 203 | fflush(stdout); |
410c8acf | 204 | } |
205 | ||
6be88c14 | 206 | static void uline(char *p, size_t len, void *b) |
410c8acf | 207 | { |
410c8acf | 208 | if (!p) { |
209 | selbuf_destroy(b); | |
210 | shutdown(fd, 1); | |
211 | f |= f_uclose; | |
212 | } else { | |
6be88c14 | 213 | p[len] = '\n'; |
3cdc3f3a | 214 | errno = EIO; |
215 | if (write(fd, p, len + 1) != len + 1) | |
216 | moan("write failed: %s", strerror(errno)); | |
217 | } | |
218 | } | |
219 | ||
220 | static void setup(const char *cmd) | |
221 | { | |
222 | dstr d = DSTR_INIT; | |
223 | char ch; | |
224 | char *p, *q; | |
225 | int n; | |
226 | ||
227 | dstr_puts(&d, cmd); | |
228 | dstr_putc(&d, '\n'); | |
229 | errno = EIO; /* Relax: be vague */ | |
230 | if (write(fd, d.buf, d.len) != d.len) { | |
231 | die(EXIT_FAILURE, "error sending setup command `%s': %s", | |
232 | cmd, strerror(errno)); | |
233 | } | |
234 | dstr_reset(&d); | |
235 | for (;;) { | |
236 | n = read(fd, &ch, 1); | |
237 | if (!n) | |
238 | die(EXIT_FAILURE, "unexpected EOF during setup"); | |
239 | if (n < 0) { | |
240 | die(EXIT_FAILURE, "error receiving reply to `%s': %s", | |
241 | cmd, strerror(errno)); | |
242 | } | |
243 | if (d.len < 256) | |
244 | dstr_putc(&d, ch); | |
245 | if (ch == '\n') { | |
246 | p = d.buf; | |
247 | q = str_getword(&p); | |
248 | if (!q) | |
249 | ; | |
250 | else if (strcmp(q, "OK") == 0) | |
251 | return; | |
252 | else if (strcmp(q, "FAIL") == 0) | |
253 | die(EXIT_FAILURE, "setup command `%s' failed: %s", cmd, p); | |
254 | dstr_reset(&d); | |
255 | } | |
410c8acf | 256 | } |
257 | } | |
258 | ||
9dd01bc6 | 259 | static void logfile(const char *name) |
260 | { | |
fa4bef80 | 261 | FILE *fp; |
262 | ||
263 | if ((fp = fopen(name, "a")) != 0) { | |
264 | if (logfp) | |
265 | fclose(logfp); | |
266 | logfp = fp; | |
267 | setvbuf(logfp, 0, _IOLBF, BUFSIZ); | |
268 | } else { | |
269 | dstr d = DSTR_INIT; | |
270 | dstr_putf(&d, "error opening logfile `%s': %s", name, strerror(errno)); | |
271 | if (logfp) | |
272 | writelog("error", d.buf); | |
273 | else if (logname) | |
274 | die(EXIT_FAILURE, d.buf); | |
275 | if (f & f_syslog) | |
276 | syslog(LOG_ERR, d.buf); | |
277 | dstr_destroy(&d); | |
9dd01bc6 | 278 | } |
9dd01bc6 | 279 | } |
280 | ||
f98df549 | 281 | static void sighup(int sig, void *v) { logfile(logname); } |
5f5150b1 | 282 | |
6047fbac | 283 | static void cleanup(void) { if (pidfile) unlink(pidfile); } |
06b2a088 | 284 | |
285 | static void sigdie(int sig) | |
6047fbac | 286 | { cleanup(); signal(sig, SIG_DFL); raise(sig); } |
06b2a088 | 287 | |
f685e692 MW |
288 | static void putarg(string_v *av, const char *fmt, ...) |
289 | { | |
290 | va_list ap; | |
291 | dstr d = DSTR_INIT; | |
292 | ||
293 | va_start(ap, fmt); | |
294 | dstr_vputf(&d, fmt, &ap); | |
295 | dstr_putz(&d); | |
296 | va_end(ap); | |
297 | DA_UNSHIFT(av, xstrdup(d.buf)); | |
298 | dstr_destroy(&d); | |
299 | } | |
300 | ||
410c8acf | 301 | static void version(FILE *fp) |
f98df549 | 302 | { pquis(fp, "$, TrIPE version " VERSION "\n"); } |
410c8acf | 303 | |
304 | static void usage(FILE *fp) | |
305 | { | |
306 | pquis(fp, "\ | |
307 | Usage:\n\ | |
2d752320 | 308 | $ [-w] [-OPTIONS] [COMMAND [ARGS]...]\n\ |
309 | $ [-Dl] [-f FILE] [-OPTIONS]\n\ | |
410c8acf | 310 | Options:\n\ |
2d752320 | 311 | [-s] [-d DIRECTORY] [-a SOCKET] [-P PIDFILE]\n\ |
312 | [-p PROGRAM] [-S ARG,ARG,...]\n\ | |
410c8acf | 313 | "); |
314 | } | |
315 | ||
316 | static void help(FILE *fp) | |
317 | { | |
318 | version(fp); | |
319 | fputc('\n', fp); | |
320 | usage(fp); | |
321 | fputs("\ | |
322 | \n\ | |
323 | Options in full:\n\ | |
324 | \n\ | |
325 | -h, --help Show this help text.\n\ | |
326 | -v, --version Show version number.\n\ | |
327 | -u, --usage Show brief usage message.\n\ | |
328 | \n\ | |
329 | -D, --daemon Become a background task after connecting.\n\ | |
ef4a1ab7 | 330 | -d, --directory=DIR Select current directory [default " CONFIGDIR "].\n\ |
ab46a787 MW |
331 | -U, --setuid=USER Set uid to USER after initialization.\n\ |
332 | -G, --setgid=GROUP Set gid to GROUP after initialization.\n\ | |
3cdc3f3a | 333 | -a, --admin-socket=FILE Select socket to connect to\n\ |
e04c2d50 | 334 | [default " SOCKETDIR "/tripesock].\n\ |
06b2a088 | 335 | -P, --pidfile=FILE Write process-id to FILE.\n\ |
410c8acf | 336 | \n\ |
337 | -s, --spawn Start server rather than connecting.\n\ | |
338 | -p, --spawn-path=PATH Specify path to executable.\n\ | |
339 | -S, --spawn-args=ARGS Specify comma-separated arguments.\n\ | |
340 | \n\ | |
341 | -l, --syslog Log messages to system log.\n\ | |
342 | -f, --logfile=FILE Log messages to FILE.\n\ | |
343 | -w, --warnings Show warnings when running commands.\n\ | |
344 | ", fp); | |
345 | } | |
346 | ||
347 | int main(int argc, char *argv[]) | |
348 | { | |
ef4a1ab7 | 349 | const char *dir = CONFIGDIR; |
350 | const char *sock = SOCKETDIR "/tripesock"; | |
410c8acf | 351 | const char *spawnpath = "tripe"; |
352 | string_v spawnopts = DA_INIT; | |
353 | char *p; | |
06b2a088 | 354 | FILE *pidfp = 0; |
8efdf64b MW |
355 | int i; |
356 | size_t sz; | |
ab46a787 MW |
357 | uid_t u = -1; |
358 | gid_t g = -1; | |
8efdf64b MW |
359 | int pfd[2]; |
360 | pid_t kid; | |
361 | struct sigaction sa; | |
362 | sigset_t newmask, oldmask; | |
363 | struct sockaddr_un sun; | |
364 | selbuf bu, bs; | |
365 | dstr d = DSTR_INIT; | |
366 | sig hup; | |
410c8acf | 367 | |
368 | ego(argv[0]); | |
369 | ||
370 | if ((p = getenv("TRIPEDIR")) != 0) | |
371 | dir = p; | |
797cf76b MW |
372 | if ((p = getenv("TRIPESOCK")) != 0) |
373 | sock = p; | |
410c8acf | 374 | |
375 | /* --- Parse the arguments --- */ | |
376 | ||
377 | for (;;) { | |
378 | static const struct option opts[] = { | |
379 | { "help", 0, 0, 'h' }, | |
380 | { "version", 0, 0, 'v' }, | |
381 | { "usage", 0, 0, 'u' }, | |
382 | { "daemon", 0, 0, 'D' }, | |
ab46a787 MW |
383 | { "uid", OPTF_ARGREQ, 0, 'U' }, |
384 | { "setuid", OPTF_ARGREQ, 0, 'U' }, | |
385 | { "gid", OPTF_ARGREQ, 0, 'G' }, | |
386 | { "setgid", OPTF_ARGREQ, 0, 'G' }, | |
410c8acf | 387 | { "directory", OPTF_ARGREQ, 0, 'd' }, |
388 | { "admin-socket", OPTF_ARGREQ, 0, 'a' }, | |
389 | { "spawn", 0, 0, 's' }, | |
390 | { "spawn-path", OPTF_ARGREQ, 0, 'p' }, | |
391 | { "spawn-args", OPTF_ARGREQ, 0, 'S' }, | |
392 | { "syslog", 0, 0, 'l' }, | |
393 | { "logfile", OPTF_ARGREQ, 0, 'f' }, | |
394 | { "warnings", 0, 0, 'w' }, | |
06b2a088 | 395 | { "pidfile", OPTF_ARGREQ, 0, 'P' }, |
410c8acf | 396 | { 0, 0, 0, 0 } |
397 | }; | |
398 | ||
8efdf64b | 399 | i = mdwopt(argc, argv, "+hvuDU:G:d:a:sp:S:lwf:nP:", opts, 0, 0, 0); |
410c8acf | 400 | if (i < 0) |
401 | break; | |
402 | switch (i) { | |
403 | case 'h': | |
404 | help(stdout); | |
405 | exit(0); | |
406 | case 'v': | |
407 | version(stdout); | |
408 | exit(0); | |
409 | case 'u': | |
410 | usage(stdout); | |
411 | exit(0); | |
412 | case 'D': | |
413 | f |= f_daemon | f_noinput; | |
414 | break; | |
ab46a787 MW |
415 | case 'U': |
416 | u = u_getuser(optarg, &g); | |
417 | break; | |
418 | case 'G': | |
419 | g = u_getgroup(optarg); | |
420 | break; | |
410c8acf | 421 | case 'd': |
422 | dir = optarg; | |
423 | break; | |
424 | case 'a': | |
425 | sock = optarg; | |
426 | break; | |
427 | case 's': | |
428 | f |= f_spawn; | |
429 | break; | |
430 | case 'p': | |
431 | f |= f_spawn; | |
432 | spawnpath = optarg; | |
433 | break; | |
434 | case 'S': | |
435 | f |= f_spawn | f_spawnopts; | |
436 | for (p = strtok(optarg, ","); p; p = strtok(0, ",")) | |
437 | DA_PUSH(&spawnopts, p); | |
438 | break; | |
439 | case 'l': | |
440 | f |= f_syslog | f_noinput; | |
441 | break; | |
442 | case 'w': | |
443 | f |= f_warn; | |
444 | break; | |
445 | case 'f': | |
9dd01bc6 | 446 | logname = optarg; |
410c8acf | 447 | f |= f_noinput; |
448 | break; | |
06b2a088 | 449 | case 'P': |
450 | pidfile = optarg; | |
451 | break; | |
410c8acf | 452 | default: |
453 | f |= f_bogus; | |
454 | break; | |
455 | } | |
456 | } | |
457 | if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) { | |
458 | usage(stderr); | |
459 | exit(EXIT_FAILURE); | |
460 | } | |
461 | ||
06b2a088 | 462 | /* --- Set various things up --- */ |
463 | ||
464 | if (chdir(dir)) { | |
465 | die(EXIT_FAILURE, "couldn't set `%s' as current directory: %s", | |
466 | dir, strerror(errno)); | |
467 | } | |
468 | if (logname) | |
469 | logfile(logname); | |
470 | if (!pidfile && (f & f_daemon) && ((f & f_syslog) || logname)) | |
471 | pidfile = "tripectl.pid"; | |
472 | if (pidfile && (pidfp = fopen(pidfile, "w")) == 0) { | |
473 | die(EXIT_FAILURE, "couldn't open `%s' for writing: %s", | |
474 | pidfile, strerror(errno)); | |
475 | } | |
8efdf64b MW |
476 | sel_init(&sel); |
477 | sig_init(&sel); | |
06b2a088 | 478 | signal(SIGINT, sigdie); |
479 | signal(SIGQUIT, sigdie); | |
480 | signal(SIGTERM, sigdie); | |
481 | atexit(cleanup); | |
482 | ||
410c8acf | 483 | /* --- Connect to the server --- */ |
484 | ||
485 | if (f & f_spawn) { | |
410c8acf | 486 | sa.sa_handler = reap; |
487 | sigemptyset(&sa.sa_mask); | |
488 | sa.sa_flags = SA_NOCLDSTOP; | |
489 | #ifdef SA_RESTART | |
490 | sa.sa_flags |= SA_RESTART; | |
491 | #endif | |
492 | sigaction(SIGCHLD, &sa, 0); | |
493 | ||
410c8acf | 494 | DA_PUSH(&spawnopts, 0); |
ab46a787 MW |
495 | if (g != (gid_t)-1) putarg(&spawnopts, "-G%lu", (unsigned long)g); |
496 | if (u != (uid_t)-1) putarg(&spawnopts, "-U%lu", (unsigned long)u); | |
f685e692 MW |
497 | putarg(&spawnopts, "-a%s", sock); |
498 | putarg(&spawnopts, "-d."); | |
499 | putarg(&spawnopts, "-F"); | |
500 | putarg(&spawnopts, "%s", spawnpath); | |
410c8acf | 501 | if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd)) |
502 | die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno)); | |
503 | sigemptyset(&newmask); | |
504 | sigaddset(&newmask, SIGCHLD); | |
505 | sigprocmask(SIG_BLOCK, &newmask, &oldmask); | |
506 | if ((kid = fork()) < 0) | |
507 | die(EXIT_FAILURE, "fork failed: %s", strerror(errno)); | |
508 | if (!kid) { | |
509 | dup2(pfd[1], STDIN_FILENO); | |
510 | dup2(pfd[1], STDOUT_FILENO); | |
410c8acf | 511 | close(pfd[0]); |
6047fbac MW |
512 | close(pfd[1]); |
513 | if (logfp) fclose(logfp); | |
514 | if (pidfp) fclose(pidfp); | |
9dd01bc6 | 515 | closelog(); |
6047fbac | 516 | if (f & f_daemon) detachtty(); |
410c8acf | 517 | execvp(DA(&spawnopts)[0], DA(&spawnopts)); |
518 | die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno)); | |
519 | } | |
520 | sigprocmask(SIG_SETMASK, &oldmask, 0); | |
521 | fd = pfd[0]; | |
522 | close(pfd[1]); | |
523 | } else { | |
8efdf64b | 524 | sz = strlen(sock) + 1; |
06b2a088 | 525 | if (sz > sizeof(sun.sun_path)) |
410c8acf | 526 | die(EXIT_FAILURE, "socket name `%s' too long", sock); |
527 | memset(&sun, 0, sizeof(sun)); | |
528 | sun.sun_family = AF_UNIX; | |
06b2a088 | 529 | memcpy(sun.sun_path, sock, sz); |
530 | sz = sz + offsetof(struct sockaddr_un, sun_path); | |
410c8acf | 531 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
532 | die(EXIT_FAILURE, "error making socket: %s", strerror(errno)); | |
533 | if (connect(fd, (struct sockaddr *)&sun, sz)) { | |
534 | die(EXIT_FAILURE, "error connecting to `%s': %s", | |
9dd01bc6 | 535 | sun.sun_path, strerror(errno)); |
410c8acf | 536 | } |
537 | } | |
538 | ||
ab46a787 | 539 | u_setugid(u, g); |
410c8acf | 540 | if (f & f_daemon) { |
19dd2531 | 541 | if (daemonize()) |
410c8acf | 542 | die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno)); |
543 | } | |
06b2a088 | 544 | if (pidfp) { |
a803add7 | 545 | fprintf(pidfp, "%li\n", (long)getpid()); |
06b2a088 | 546 | fclose(pidfp); |
547 | } | |
3cdc3f3a | 548 | signal(SIGPIPE, SIG_IGN); |
410c8acf | 549 | |
550 | /* --- If we're meant to be interactive, do that --- */ | |
551 | ||
3cdc3f3a | 552 | if (optind == argc) |
553 | setup("WATCH -A+tw"); | |
410c8acf | 554 | if (!(f & f_noinput) && optind == argc) { |
410c8acf | 555 | selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu); |
556 | selbuf_init(&bs, &sel, fd, sline, &bs); | |
557 | for (;;) { | |
5f5150b1 | 558 | if (sel_select(&sel) && errno != EINTR && errno != EAGAIN) |
410c8acf | 559 | die(EXIT_FAILURE, "select failed: %s", strerror(errno)); |
560 | } | |
561 | } | |
562 | ||
563 | /* --- If there's a command, submit it --- */ | |
564 | ||
565 | if (optind < argc) { | |
3cdc3f3a | 566 | setup((f & f_warn) ? "WATCH -A+w" : "WATCH -A"); |
0ed0735f MW |
567 | while (optind < argc) |
568 | u_quotify(&d, argv[optind++]); | |
410c8acf | 569 | dstr_putc(&d, '\n'); |
3cdc3f3a | 570 | errno = EIO; |
571 | if (write(fd, d.buf, d.len) != d.len || shutdown(fd, 1)) | |
572 | die(EXIT_FAILURE, "write failed: %s", strerror(errno)); | |
410c8acf | 573 | dstr_destroy(&d); |
574 | f |= f_command; | |
575 | } | |
576 | ||
577 | /* --- Pull everything else out of the box --- */ | |
578 | ||
8efdf64b | 579 | selbuf_init(&bs, &sel, fd, cline, 0); |
5f5150b1 | 580 | |
8efdf64b MW |
581 | if (f & f_syslog) |
582 | openlog(QUIS, 0, LOG_DAEMON); | |
583 | if (logfp) | |
584 | sig_add(&hup, SIGHUP, sighup, 0); | |
585 | for (;;) { | |
586 | if (sel_select(&sel) && errno != EINTR && errno != EAGAIN) | |
587 | die(EXIT_FAILURE, "select failed: %s", strerror(errno)); | |
410c8acf | 588 | } |
589 | ||
590 | return (0); | |
591 | } | |
592 | ||
593 | /*----- That's all, folks -------------------------------------------------*/ |