chiark / gitweb /
Fix uninitialized variable in p_create.
[tripe] / client.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;
82
83#define f_bogus 1u
84#define f_spawn 2u
85#define f_daemon 4u
86#define f_spawnopts 8u
87#define f_syslog 16u
88#define f_command 32u
89#define f_noinput 64u
90#define f_warn 128u
91#define f_uclose 256u
92
93/*----- Main code ---------------------------------------------------------*/
94
95static void reap(int sig)
96{
410c8acf 97 int e = errno;
06b2a088 98 while (waitpid(-1, 0, WNOHANG) > 0)
410c8acf 99 ;
100 errno = e;
101}
102
103static void writelog(const char *cat, const char *msg)
104{
105 char buf[256];
106 time_t t = time(0);
107 struct tm *tm = localtime(&t);
108 strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
109 fprintf(logfp, "%s %s: %s\n", buf, cat, msg);
110}
111
6be88c14 112static void cline(char *p, size_t len, void *b)
410c8acf 113{
114 char *q;
115 if (!p) {
116 if (f & f_command)
117 die(EXIT_FAILURE, "server dropped the connection");
118 exit(0);
119 }
120 q = str_getword(&p);
121 if (!q)
122 return;
123 if (strcmp(q, "WARN") == 0) {
124 if (f & f_syslog)
125 syslog(LOG_WARNING, "%s", p);
126 if (logfp)
127 writelog("warning", p);
128 if (f & f_warn)
129 fprintf(stderr, "Warning: %s\n", p);
130 } else if (strcmp(q, "TRACE") == 0) {
131 if (f & f_syslog)
132 syslog(LOG_DEBUG, "%s", p);
133 if (logfp)
134 writelog("debug", p);
135 } else if (!(f & f_command)) {
136 if (f & f_syslog)
137 syslog(LOG_ERR, "unexpected output `%s %s'", q, p);
138 if (logfp) {
139 dstr d = DSTR_INIT;
140 dstr_putf(&d, "unexpected output `%s %s'", q, p);
141 writelog("error", d.buf);
142 dstr_destroy(&d);
143 }
7fadfa0d 144 } else if (strcmp(q, "FAIL") == 0)
410c8acf 145 die(EXIT_FAILURE, "%s", p);
146 else if (strcmp(q, "INFO") == 0)
147 puts(p);
148 else if (strcmp(q, "OK") == 0)
149 exit(0);
150 else
151 die(EXIT_FAILURE, "unexpected output `%s %s'", q, p);
152}
153
6be88c14 154static void sline(char *p, size_t len, void *b)
410c8acf 155{
156 if (!p) {
157 if (!(f & f_uclose))
158 moan("server closed the connection");
159 exit(0);
160 }
161 puts(p);
162}
163
6be88c14 164static void uline(char *p, size_t len, void *b)
410c8acf 165{
410c8acf 166 if (!p) {
167 selbuf_destroy(b);
168 shutdown(fd, 1);
169 f |= f_uclose;
170 } else {
6be88c14 171 p[len] = '\n';
3cdc3f3a 172 errno = EIO;
173 if (write(fd, p, len + 1) != len + 1)
174 moan("write failed: %s", strerror(errno));
175 }
176}
177
178static void setup(const char *cmd)
179{
180 dstr d = DSTR_INIT;
181 char ch;
182 char *p, *q;
183 int n;
184
185 dstr_puts(&d, cmd);
186 dstr_putc(&d, '\n');
187 errno = EIO; /* Relax: be vague */
188 if (write(fd, d.buf, d.len) != d.len) {
189 die(EXIT_FAILURE, "error sending setup command `%s': %s",
190 cmd, strerror(errno));
191 }
192 dstr_reset(&d);
193 for (;;) {
194 n = read(fd, &ch, 1);
195 if (!n)
196 die(EXIT_FAILURE, "unexpected EOF during setup");
197 if (n < 0) {
198 die(EXIT_FAILURE, "error receiving reply to `%s': %s",
199 cmd, strerror(errno));
200 }
201 if (d.len < 256)
202 dstr_putc(&d, ch);
203 if (ch == '\n') {
204 p = d.buf;
205 q = str_getword(&p);
206 if (!q)
207 ;
208 else if (strcmp(q, "OK") == 0)
209 return;
210 else if (strcmp(q, "FAIL") == 0)
211 die(EXIT_FAILURE, "setup command `%s' failed: %s", cmd, p);
212 dstr_reset(&d);
213 }
410c8acf 214 }
215}
216
9dd01bc6 217static void logfile(const char *name)
218{
fa4bef80 219 FILE *fp;
220
221 if ((fp = fopen(name, "a")) != 0) {
222 if (logfp)
223 fclose(logfp);
224 logfp = fp;
225 setvbuf(logfp, 0, _IOLBF, BUFSIZ);
226 } else {
227 dstr d = DSTR_INIT;
228 dstr_putf(&d, "error opening logfile `%s': %s", name, strerror(errno));
229 if (logfp)
230 writelog("error", d.buf);
231 else if (logname)
232 die(EXIT_FAILURE, d.buf);
233 if (f & f_syslog)
234 syslog(LOG_ERR, d.buf);
235 dstr_destroy(&d);
9dd01bc6 236 }
9dd01bc6 237}
238
5f5150b1 239static void sighup(int sig, void *v)
240{
241 logfile(logname);
242}
243
06b2a088 244static void cleanup(void)
245{
246 if (pidfile)
247 unlink(pidfile);
248}
249
250static void sigdie(int sig)
251{
252 cleanup();
253 signal(sig, SIG_DFL);
254 raise(sig);
255}
256
410c8acf 257static void version(FILE *fp)
258{
259 pquis(fp, "$, TrIPE version " VERSION "\n");
260}
261
262static void usage(FILE *fp)
263{
264 pquis(fp, "\
265Usage:\n\
2d752320 266 $ [-w] [-OPTIONS] [COMMAND [ARGS]...]\n\
267 $ [-Dl] [-f FILE] [-OPTIONS]\n\
410c8acf 268Options:\n\
2d752320 269 [-s] [-d DIRECTORY] [-a SOCKET] [-P PIDFILE]\n\
270 [-p PROGRAM] [-S ARG,ARG,...]\n\
410c8acf 271");
272}
273
274static void help(FILE *fp)
275{
276 version(fp);
277 fputc('\n', fp);
278 usage(fp);
279 fputs("\
280\n\
281Options in full:\n\
282\n\
283-h, --help Show this help text.\n\
284-v, --version Show version number.\n\
285-u, --usage Show brief usage message.\n\
286\n\
287-D, --daemon Become a background task after connecting.\n\
ef4a1ab7 288-d, --directory=DIR Select current directory [default " CONFIGDIR "].\n\
3cdc3f3a 289-a, --admin-socket=FILE Select socket to connect to\n\
ef4a1ab7 290 [default " SOCKETDIR "/tripesock].\n\
06b2a088 291-P, --pidfile=FILE Write process-id to FILE.\n\
410c8acf 292\n\
293-s, --spawn Start server rather than connecting.\n\
294-p, --spawn-path=PATH Specify path to executable.\n\
295-S, --spawn-args=ARGS Specify comma-separated arguments.\n\
296\n\
297-l, --syslog Log messages to system log.\n\
298-f, --logfile=FILE Log messages to FILE.\n\
299-w, --warnings Show warnings when running commands.\n\
300", fp);
301}
302
303int main(int argc, char *argv[])
304{
ef4a1ab7 305 const char *dir = CONFIGDIR;
306 const char *sock = SOCKETDIR "/tripesock";
410c8acf 307 const char *spawnpath = "tripe";
308 string_v spawnopts = DA_INIT;
309 char *p;
06b2a088 310 FILE *pidfp = 0;
410c8acf 311
312 ego(argv[0]);
313
314 if ((p = getenv("TRIPEDIR")) != 0)
315 dir = p;
316
317 /* --- Parse the arguments --- */
318
319 for (;;) {
320 static const struct option opts[] = {
321 { "help", 0, 0, 'h' },
322 { "version", 0, 0, 'v' },
323 { "usage", 0, 0, 'u' },
324 { "daemon", 0, 0, 'D' },
325 { "directory", OPTF_ARGREQ, 0, 'd' },
326 { "admin-socket", OPTF_ARGREQ, 0, 'a' },
327 { "spawn", 0, 0, 's' },
328 { "spawn-path", OPTF_ARGREQ, 0, 'p' },
329 { "spawn-args", OPTF_ARGREQ, 0, 'S' },
330 { "syslog", 0, 0, 'l' },
331 { "logfile", OPTF_ARGREQ, 0, 'f' },
332 { "warnings", 0, 0, 'w' },
06b2a088 333 { "pidfile", OPTF_ARGREQ, 0, 'P' },
410c8acf 334 { 0, 0, 0, 0 }
335 };
336
06b2a088 337 int i = mdwopt(argc, argv, "+hvuDd:a:sp:S:lwf:nP:", opts, 0, 0, 0);
410c8acf 338 if (i < 0)
339 break;
340 switch (i) {
341 case 'h':
342 help(stdout);
343 exit(0);
344 case 'v':
345 version(stdout);
346 exit(0);
347 case 'u':
348 usage(stdout);
349 exit(0);
350 case 'D':
351 f |= f_daemon | f_noinput;
352 break;
353 case 'd':
354 dir = optarg;
355 break;
356 case 'a':
357 sock = optarg;
358 break;
359 case 's':
360 f |= f_spawn;
361 break;
362 case 'p':
363 f |= f_spawn;
364 spawnpath = optarg;
365 break;
366 case 'S':
367 f |= f_spawn | f_spawnopts;
368 for (p = strtok(optarg, ","); p; p = strtok(0, ","))
369 DA_PUSH(&spawnopts, p);
370 break;
371 case 'l':
372 f |= f_syslog | f_noinput;
373 break;
374 case 'w':
375 f |= f_warn;
376 break;
377 case 'f':
9dd01bc6 378 logname = optarg;
410c8acf 379 f |= f_noinput;
380 break;
06b2a088 381 case 'P':
382 pidfile = optarg;
383 break;
410c8acf 384 default:
385 f |= f_bogus;
386 break;
387 }
388 }
389 if ((f & f_bogus) || ((f & f_noinput) && optind < argc)) {
390 usage(stderr);
391 exit(EXIT_FAILURE);
392 }
393
06b2a088 394 /* --- Set various things up --- */
395
396 if (chdir(dir)) {
397 die(EXIT_FAILURE, "couldn't set `%s' as current directory: %s",
398 dir, strerror(errno));
399 }
400 if (logname)
401 logfile(logname);
402 if (!pidfile && (f & f_daemon) && ((f & f_syslog) || logname))
403 pidfile = "tripectl.pid";
404 if (pidfile && (pidfp = fopen(pidfile, "w")) == 0) {
405 die(EXIT_FAILURE, "couldn't open `%s' for writing: %s",
406 pidfile, strerror(errno));
407 }
408 signal(SIGINT, sigdie);
409 signal(SIGQUIT, sigdie);
410 signal(SIGTERM, sigdie);
411 atexit(cleanup);
412
410c8acf 413 /* --- Connect to the server --- */
414
415 if (f & f_spawn) {
416 int pfd[2];
417 pid_t kid;
418 struct sigaction sa;
419 sigset_t newmask, oldmask;
420
421 sa.sa_handler = reap;
422 sigemptyset(&sa.sa_mask);
423 sa.sa_flags = SA_NOCLDSTOP;
424#ifdef SA_RESTART
425 sa.sa_flags |= SA_RESTART;
426#endif
427 sigaction(SIGCHLD, &sa, 0);
428
06b2a088 429 DA_UNSHIFT(&spawnopts, (char *)sock);
430 DA_UNSHIFT(&spawnopts, "-a");
431 DA_UNSHIFT(&spawnopts, "-d.");
d071d798 432 DA_UNSHIFT(&spawnopts, (char *)spawnpath);
410c8acf 433 DA_PUSH(&spawnopts, 0);
434 if (socketpair(PF_UNIX, SOCK_STREAM, 0, pfd))
435 die(EXIT_FAILURE, "error from socketpair: %s", strerror(errno));
436 sigemptyset(&newmask);
437 sigaddset(&newmask, SIGCHLD);
438 sigprocmask(SIG_BLOCK, &newmask, &oldmask);
439 if ((kid = fork()) < 0)
440 die(EXIT_FAILURE, "fork failed: %s", strerror(errno));
441 if (!kid) {
442 dup2(pfd[1], STDIN_FILENO);
443 dup2(pfd[1], STDOUT_FILENO);
444 close(pfd[1]);
445 close(pfd[0]);
9dd01bc6 446 if (logfp)
447 fclose(logfp);
7ed14135 448 if (pidfp)
449 fclose(pidfp);
9dd01bc6 450 closelog();
06b2a088 451 if (f & f_daemon)
452 u_detach();
410c8acf 453 execvp(DA(&spawnopts)[0], DA(&spawnopts));
454 die(127, "couldn't exec `%s': %s", spawnpath, strerror(errno));
455 }
456 sigprocmask(SIG_SETMASK, &oldmask, 0);
457 fd = pfd[0];
458 close(pfd[1]);
459 } else {
460 struct sockaddr_un sun;
461 size_t sz = strlen(sock) + 1;
06b2a088 462 if (sz > sizeof(sun.sun_path))
410c8acf 463 die(EXIT_FAILURE, "socket name `%s' too long", sock);
464 memset(&sun, 0, sizeof(sun));
465 sun.sun_family = AF_UNIX;
06b2a088 466 memcpy(sun.sun_path, sock, sz);
467 sz = sz + offsetof(struct sockaddr_un, sun_path);
410c8acf 468 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
469 die(EXIT_FAILURE, "error making socket: %s", strerror(errno));
470 if (connect(fd, (struct sockaddr *)&sun, sz)) {
471 die(EXIT_FAILURE, "error connecting to `%s': %s",
9dd01bc6 472 sun.sun_path, strerror(errno));
410c8acf 473 }
474 }
475
476 if (f & f_daemon) {
477 if (u_daemon())
478 die(EXIT_FAILURE, "error becoming daemon: %s", strerror(errno));
479 }
06b2a088 480 if (pidfp) {
a803add7 481 fprintf(pidfp, "%li\n", (long)getpid());
06b2a088 482 fclose(pidfp);
483 }
3cdc3f3a 484 signal(SIGPIPE, SIG_IGN);
410c8acf 485
486 /* --- If we're meant to be interactive, do that --- */
487
3cdc3f3a 488 if (optind == argc)
489 setup("WATCH -A+tw");
410c8acf 490 if (!(f & f_noinput) && optind == argc) {
491 sel_state sel;
492 selbuf bu, bs;
493
494 sel_init(&sel);
495 selbuf_init(&bu, &sel, STDIN_FILENO, uline, &bu);
496 selbuf_init(&bs, &sel, fd, sline, &bs);
497 for (;;) {
5f5150b1 498 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
410c8acf 499 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
500 }
501 }
502
503 /* --- If there's a command, submit it --- */
504
505 if (optind < argc) {
506 dstr d = DSTR_INIT;
3cdc3f3a 507 setup((f & f_warn) ? "WATCH -A+w" : "WATCH -A");
410c8acf 508 dstr_puts(&d, argv[optind++]);
509 while (optind < argc) {
510 dstr_putc(&d, ' ');
511 dstr_puts(&d, argv[optind++]);
512 }
513 dstr_putc(&d, '\n');
3cdc3f3a 514 errno = EIO;
515 if (write(fd, d.buf, d.len) != d.len || shutdown(fd, 1))
516 die(EXIT_FAILURE, "write failed: %s", strerror(errno));
410c8acf 517 dstr_destroy(&d);
518 f |= f_command;
519 }
520
521 /* --- Pull everything else out of the box --- */
522
523 {
5f5150b1 524 sel_state sel;
525 selbuf b;
526 sig hup;
527
528 sel_init(&sel);
529 selbuf_init(&b, &sel, fd, cline, 0);
530
410c8acf 531 if (f & f_syslog)
532 openlog(QUIS, 0, LOG_DAEMON);
9dd01bc6 533 if (logfp) {
5f5150b1 534 sig_init(&sel);
535 sig_add(&hup, SIGHUP, sighup, 0);
9dd01bc6 536 }
410c8acf 537 for (;;) {
5f5150b1 538 if (sel_select(&sel) && errno != EINTR && errno != EAGAIN)
539 die(EXIT_FAILURE, "select failed: %s", strerror(errno));
410c8acf 540 }
410c8acf 541 }
542
543 return (0);
544}
545
546/*----- That's all, folks -------------------------------------------------*/