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Merge branches 'cleanup' and 'services'
[tripe] / client / tripectl.c
CommitLineData
410c8acf 1/* -*-c-*-
2 *
2d752320 3 * $Id$
410c8acf 4 *
5 * Client for TrIPE
6 *
7 * (c) 2001 Straylight/Edgeware
8 */
9
10/*----- Licensing notice --------------------------------------------------*
11 *
12 * This file is part of Trivial IP Encryption (TrIPE).
13 *
14 * TrIPE is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * TrIPE is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with TrIPE; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 */
28
410c8acf 29/*----- Header files ------------------------------------------------------*/
30
73189848 31#include "config.h"
32
410c8acf 33#include <ctype.h>
34#include <errno.h>
35#include <signal.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <time.h>
40
41#include <sys/types.h>
42#include <sys/time.h>
43#include <unistd.h>
44#include <fcntl.h>
45#include <sys/wait.h>
46#include <syslog.h>
47
48#include <sys/socket.h>
49#include <sys/un.h>
50#include <arpa/inet.h>
51#include <netdb.h>
52
53#include <mLib/alloc.h>
54#include <mLib/darray.h>
55#include <mLib/dstr.h>
410c8acf 56#include <mLib/mdwopt.h>
57#include <mLib/quis.h>
58#include <mLib/report.h>
59#include <mLib/sel.h>
60#include <mLib/selbuf.h>
5f5150b1 61#include <mLib/sig.h>
410c8acf 62#include <mLib/str.h>
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
06b2a088 77static const char *pidfile = 0;
78static const char *logname = 0;
410c8acf 79static FILE *logfp = 0;
80static unsigned f = 0;
81static int fd;
de014da6 82static const char *bgtag = 0;
410c8acf 83
84#define f_bogus 1u
85#define f_spawn 2u
86#define f_daemon 4u
87#define f_spawnopts 8u
88#define f_syslog 16u
89#define f_command 32u
90#define f_noinput 64u
91#define f_warn 128u
92#define f_uclose 256u
93
94/*----- Main code ---------------------------------------------------------*/
95
96static void reap(int sig)
97{
410c8acf 98 int e = errno;
06b2a088 99 while (waitpid(-1, 0, WNOHANG) > 0)
410c8acf 100 ;
101 errno = e;
102}
103
104static void writelog(const char *cat, const char *msg)
105{
106 char buf[256];
107 time_t t = time(0);
108 struct tm *tm = localtime(&t);
109 strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
110 fprintf(logfp, "%s %s: %s\n", buf, cat, msg);
111}
112
de014da6 113static void checkbg(char **p)
114{
115 char *q = str_getword(p);
116 if (!q)
117 die(EXIT_FAILURE, "missing background tag");
118 if (!bgtag || strcmp(bgtag, q) != 0)
119 die(EXIT_FAILURE, "unexpected background tag `%s'", q);
120}
121
122static void checkfg(void)
123{
124 if (bgtag)
125 die(EXIT_FAILURE, "unexpected foreground response");
126}
127
6be88c14 128static void cline(char *p, size_t len, void *b)
410c8acf 129{
130 char *q;
131 if (!p) {
132 if (f & f_command)
133 die(EXIT_FAILURE, "server dropped the connection");
134 exit(0);
135 }
136 q = str_getword(&p);
137 if (!q)
138 return;
139 if (strcmp(q, "WARN") == 0) {
140 if (f & f_syslog)
141 syslog(LOG_WARNING, "%s", p);
142 if (logfp)
143 writelog("warning", p);
144 if (f & f_warn)
145 fprintf(stderr, "Warning: %s\n", p);
146 } else if (strcmp(q, "TRACE") == 0) {
147 if (f & f_syslog)
148 syslog(LOG_DEBUG, "%s", p);
149 if (logfp)
150 writelog("debug", p);
151 } else if (!(f & f_command)) {
152 if (f & f_syslog)
153 syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
154 if (logfp) {
155 dstr d = DSTR_INIT;
156 dstr_putf(&d, "unexpected output `%s %s'", q, p);
157 writelog("error", d.buf);
158 dstr_destroy(&d);
159 }
de014da6 160 } else if (strcmp(q, "FAIL") == 0) {
161 checkfg();
410c8acf 162 die(EXIT_FAILURE, "%s", p);
de014da6 163 } else if (strcmp(q, "INFO") == 0) {
164 checkfg();
410c8acf 165 puts(p);
de014da6 166 } else if (strcmp(q, "OK") == 0) {
167 checkfg();
168 exit(0);
169 } else if (strcmp(q, "BGDETACH") == 0) {
170 if (bgtag)
171 die(EXIT_FAILURE, "repeat detach");
172 bgtag = xstrdup(p);
173 } else if (strcmp(q, "BGOK") == 0) {
174 checkbg(&p);
410c8acf 175 exit(0);
de014da6 176 } else if (strcmp(q, "BGINFO") == 0) {
177 checkbg(&p);
178 puts(p);
179 } else if (strcmp(q, "BGFAIL") == 0) {
180 checkbg(&p);
181 die(EXIT_FAILURE, "%s", p);
182 } else
410c8acf 183 die(EXIT_FAILURE, "unexpected output `%s %s'", q, p);
184}
185
6be88c14 186static void sline(char *p, size_t len, void *b)
410c8acf 187{
188 if (!p) {
189 if (!(f & f_uclose))
190 moan("server closed the connection");
191 exit(0);
192 }
193 puts(p);
194}
195
6be88c14 196static void uline(char *p, size_t len, void *b)
410c8acf 197{
410c8acf 198 if (!p) {
199 selbuf_destroy(b);
200 shutdown(fd, 1);
201 f |= f_uclose;
202 } else {
6be88c14 203 p[len] = '\n';
3cdc3f3a 204 errno = EIO;
205 if (write(fd, p, len + 1) != len + 1)
206 moan("write failed: %s", strerror(errno));
207 }
208}
209
210static void setup(const char *cmd)
211{
212 dstr d = DSTR_INIT;
213 char ch;
214 char *p, *q;
215 int n;
216
217 dstr_puts(&d, cmd);
218 dstr_putc(&d, '\n');
219 errno = EIO; /* Relax: be vague */
220 if (write(fd, d.buf, d.len) != d.len) {
221 die(EXIT_FAILURE, "error sending setup command `%s': %s",
222 cmd, strerror(errno));
223 }
224 dstr_reset(&d);
225 for (;;) {
226 n = read(fd, &ch, 1);
227 if (!n)
228 die(EXIT_FAILURE, "unexpected EOF during setup");
229 if (n < 0) {
230 die(EXIT_FAILURE, "error receiving reply to `%s': %s",
231 cmd, strerror(errno));
232 }
233 if (d.len < 256)
234 dstr_putc(&d, ch);
235 if (ch == '\n') {
236 p = d.buf;
237 q = str_getword(&p);
238 if (!q)
239 ;
240 else if (strcmp(q, "OK") == 0)
241 return;
242 else if (strcmp(q, "FAIL") == 0)
243 die(EXIT_FAILURE, "setup command `%s' failed: %s", cmd, p);
244 dstr_reset(&d);
245 }
410c8acf 246 }
247}
248
9dd01bc6 249static void logfile(const char *name)
250{
fa4bef80 251 FILE *fp;
252
253 if ((fp = fopen(name, "a")) != 0) {
254 if (logfp)
255 fclose(logfp);
256 logfp = fp;
257 setvbuf(logfp, 0, _IOLBF, BUFSIZ);
258 } else {
259 dstr d = DSTR_INIT;
260 dstr_putf(&d, "error opening logfile `%s': %s", name, strerror(errno));
261 if (logfp)
262 writelog("error", d.buf);
263 else if (logname)
264 die(EXIT_FAILURE, d.buf);
265 if (f & f_syslog)
266 syslog(LOG_ERR, d.buf);
267 dstr_destroy(&d);
9dd01bc6 268 }
9dd01bc6 269}
270
f98df549 271static void sighup(int sig, void *v) { logfile(logname); }
5f5150b1 272
06b2a088 273static void cleanup(void)
274{
275 if (pidfile)
276 unlink(pidfile);
277}
278
279static void sigdie(int sig)
280{
281 cleanup();
282 signal(sig, SIG_DFL);
283 raise(sig);
284}
285
410c8acf 286static void version(FILE *fp)
f98df549 287 { pquis(fp, "$, TrIPE version " VERSION "\n"); }
410c8acf 288
289static void usage(FILE *fp)
290{
291 pquis(fp, "\
292Usage:\n\
2d752320 293 $ [-w] [-OPTIONS] [COMMAND [ARGS]...]\n\
294 $ [-Dl] [-f FILE] [-OPTIONS]\n\
410c8acf 295Options:\n\
2d752320 296 [-s] [-d DIRECTORY] [-a SOCKET] [-P PIDFILE]\n\
297 [-p PROGRAM] [-S ARG,ARG,...]\n\
410c8acf 298");
299}
300
301static void help(FILE *fp)
302{
303 version(fp);
304 fputc('\n', fp);
305 usage(fp);
306 fputs("\
307\n\
308Options in full:\n\
309\n\
310-h, --help Show this help text.\n\
311-v, --version Show version number.\n\
312-u, --usage Show brief usage message.\n\
313\n\
314-D, --daemon Become a background task after connecting.\n\
ef4a1ab7 315-d, --directory=DIR Select current directory [default " CONFIGDIR "].\n\
3cdc3f3a 316-a, --admin-socket=FILE Select socket to connect to\n\
ef4a1ab7 317 [default " SOCKETDIR "/tripesock].\n\
06b2a088 318-P, --pidfile=FILE Write process-id to FILE.\n\
410c8acf 319\n\
320-s, --spawn Start server rather than connecting.\n\
321-p, --spawn-path=PATH Specify path to executable.\n\
322-S, --spawn-args=ARGS Specify comma-separated arguments.\n\
323\n\
324-l, --syslog Log messages to system log.\n\
325-f, --logfile=FILE Log messages to FILE.\n\
326-w, --warnings Show warnings when running commands.\n\
327", fp);
328}
329
330int main(int argc, char *argv[])
331{
ef4a1ab7 332 const char *dir = CONFIGDIR;
333 const char *sock = SOCKETDIR "/tripesock";
410c8acf 334 const char *spawnpath = "tripe";
335 string_v spawnopts = DA_INIT;
336 char *p;
06b2a088 337 FILE *pidfp = 0;
410c8acf 338
339 ego(argv[0]);
340
341 if ((p = getenv("TRIPEDIR")) != 0)
342 dir = p;
343
344 /* --- Parse the arguments --- */
345
346 for (;;) {
347 static const struct option opts[] = {
348 { "help", 0, 0, 'h' },
349 { "version", 0, 0, 'v' },
350 { "usage", 0, 0, 'u' },
351 { "daemon", 0, 0, 'D' },
352 { "directory", OPTF_ARGREQ, 0, 'd' },
353 { "admin-socket", OPTF_ARGREQ, 0, 'a' },
354 { "spawn", 0, 0, 's' },
355 { "spawn-path", OPTF_ARGREQ, 0, 'p' },
356 { "spawn-args", OPTF_ARGREQ, 0, 'S' },
357 { "syslog", 0, 0, 'l' },
358 { "logfile", OPTF_ARGREQ, 0, 'f' },
359 { "warnings", 0, 0, 'w' },
06b2a088 360 { "pidfile", OPTF_ARGREQ, 0, 'P' },
410c8acf 361 { 0, 0, 0, 0 }
362 };
363
06b2a088 364 int i = mdwopt(argc, argv, "+hvuDd:a:sp:S:lwf:nP:", opts, 0, 0, 0);
410c8acf 365 if (i < 0)
366 break;
367 switch (i) {
368 case 'h':
369 help(stdout);
370 exit(0);
371 case 'v':
372 version(stdout);
373 exit(0);
374 case 'u':
375 usage(stdout);
376 exit(0);
377 case 'D':
378 f |= f_daemon | f_noinput;
379 break;
380 case 'd':
381 dir = optarg;
382 break;
383 case 'a':
384 sock = optarg;
385 break;
386 case 's':
387 f |= f_spawn;
388 break;
389 case 'p':
390 f |= f_spawn;
391 spawnpath = optarg;
392 break;
393 case 'S':
394 f |= f_spawn | f_spawnopts;
395 for (p = strtok(optarg, ","); p; p = strtok(0, ","))
396 DA_PUSH(&spawnopts, p);
397 break;
398 case 'l':
399 f |= f_syslog | f_noinput;
400 break;
401 case 'w':
402 f |= f_warn;
403 break;
404 case 'f':
9dd01bc6 405 logname = optarg;
410c8acf 406 f |= f_noinput;
407 break;
06b2a088 408 case 'P':
409 pidfile = optarg;
410 break;
410c8acf 411 default:
412 f |= f_bogus;
413 break;
414 }
415 }
416 if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) {
417 usage(stderr);
418 exit(EXIT_FAILURE);
419 }
420
06b2a088 421 /* --- Set various things up --- */
422
423 if (chdir(dir)) {
424 die(EXIT_FAILURE, "couldn't set `%s' as current directory: %s",
425 dir, strerror(errno));
426 }
427 if (logname)
428 logfile(logname);
429 if (!pidfile && (f & f_daemon) && ((f & f_syslog) || logname))
430 pidfile = "tripectl.pid";
431 if (pidfile && (pidfp = fopen(pidfile, "w")) == 0) {
432 die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
433 pidfile, strerror(errno));
434 }
435 signal(SIGINT, sigdie);
436 signal(SIGQUIT, sigdie);
437 signal(SIGTERM, sigdie);
438 atexit(cleanup);
439
410c8acf 440 /* --- Connect to the server --- */
441
442 if (f & f_spawn) {
443 int pfd[2];
444 pid_t kid;
445 struct sigaction sa;
446 sigset_t newmask, oldmask;
447
448 sa.sa_handler = reap;
449 sigemptyset(&sa.sa_mask);
450 sa.sa_flags = SA_NOCLDSTOP;
451#ifdef SA_RESTART
452 sa.sa_flags |= SA_RESTART;
453#endif
454 sigaction(SIGCHLD, &sa, 0);
455
06b2a088 456 DA_UNSHIFT(&spawnopts, (char *)sock);
457 DA_UNSHIFT(&spawnopts, "-a");
458 DA_UNSHIFT(&spawnopts, "-d.");
d071d798 459 DA_UNSHIFT(&spawnopts, (char *)spawnpath);
410c8acf 460 DA_PUSH(&spawnopts, 0);
461 if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
462 die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
463 sigemptyset(&newmask);
464 sigaddset(&newmask, SIGCHLD);
465 sigprocmask(SIG_BLOCK, &newmask, &oldmask);
466 if ((kid = fork()) < 0)
467 die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
468 if (!kid) {
469 dup2(pfd[1], STDIN_FILENO);
470 dup2(pfd[1], STDOUT_FILENO);
471 close(pfd[1]);
472 close(pfd[0]);
9dd01bc6 473 if (logfp)
474 fclose(logfp);
7ed14135 475 if (pidfp)
476 fclose(pidfp);
9dd01bc6 477 closelog();
06b2a088 478 if (f & f_daemon)
479 u_detach();
410c8acf 480 execvp(DA(&spawnopts)[0], DA(&spawnopts));
481 die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
482 }
483 sigprocmask(SIG_SETMASK, &oldmask, 0);
484 fd = pfd[0];
485 close(pfd[1]);
486 } else {
487 struct sockaddr_un sun;
488 size_t sz = strlen(sock) + 1;
06b2a088 489 if (sz > sizeof(sun.sun_path))
410c8acf 490 die(EXIT_FAILURE, "socket name `%s' too long", sock);
491 memset(&sun, 0, sizeof(sun));
492 sun.sun_family = AF_UNIX;
06b2a088 493 memcpy(sun.sun_path, sock, sz);
494 sz = sz + offsetof(struct sockaddr_un, sun_path);
410c8acf 495 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
496 die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
497 if (connect(fd, (struct sockaddr *)&sun, sz)) {
498 die(EXIT_FAILURE, "error connecting to `%s': %s",
9dd01bc6 499 sun.sun_path, strerror(errno));
410c8acf 500 }
501 }
502
503 if (f & f_daemon) {
504 if (u_daemon())
505 die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
506 }
06b2a088 507 if (pidfp) {
a803add7 508 fprintf(pidfp, "%li\n", (long)getpid());
06b2a088 509 fclose(pidfp);
510 }
3cdc3f3a 511 signal(SIGPIPE, SIG_IGN);
410c8acf 512
513 /* --- If we're meant to be interactive, do that --- */
514
3cdc3f3a 515 if (optind == argc)
516 setup("WATCH -A+tw");
410c8acf 517 if (!(f & f_noinput) && optind == argc) {
518 sel_state sel;
519 selbuf bu, bs;
520
521 sel_init(&sel);
522 selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
523 selbuf_init(&bs, &sel, fd, sline, &bs);
524 for (;;) {
5f5150b1 525 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
410c8acf 526 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
527 }
528 }
529
530 /* --- If there's a command, submit it --- */
531
532 if (optind < argc) {
533 dstr d = DSTR_INIT;
3cdc3f3a 534 setup((f & f_warn) ? "WATCH -A+w" : "WATCH -A");
410c8acf 535 dstr_puts(&d, argv[optind++]);
536 while (optind < argc) {
537 dstr_putc(&d, ' ');
538 dstr_puts(&d, argv[optind++]);
539 }
540 dstr_putc(&d, '\n');
3cdc3f3a 541 errno = EIO;
542 if (write(fd, d.buf, d.len) != d.len || shutdown(fd, 1))
543 die(EXIT_FAILURE, "write failed: %s", strerror(errno));
410c8acf 544 dstr_destroy(&d);
545 f |= f_command;
546 }
547
548 /* --- Pull everything else out of the box --- */
549
550 {
5f5150b1 551 sel_state sel;
552 selbuf b;
553 sig hup;
554
555 sel_init(&sel);
556 selbuf_init(&b, &sel, fd, cline, 0);
557
410c8acf 558 if (f & f_syslog)
559 openlog(QUIS, 0, LOG_DAEMON);
9dd01bc6 560 if (logfp) {
5f5150b1 561 sig_init(&sel);
562 sig_add(&hup, SIGHUP, sighup, 0);
9dd01bc6 563 }
410c8acf 564 for (;;) {
5f5150b1 565 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
566 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
410c8acf 567 }
410c8acf 568 }
569
570 return (0);
571}
572
573/*----- That's all, folks -------------------------------------------------*/