Annotation of src/usr.bin/tmux/tmux.c, Revision 1.29
1.29 ! nicm 1: /* $OpenBSD: tmux.c,v 1.28 2009/08/08 20:36:42 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20: #include <sys/stat.h>
21:
22: #include <errno.h>
23: #include <paths.h>
24: #include <pwd.h>
25: #include <signal.h>
26: #include <stdlib.h>
27: #include <string.h>
28: #include <syslog.h>
29: #include <unistd.h>
30:
31: #include "tmux.h"
32:
33: #ifdef DEBUG
34: const char *malloc_options = "AFGJPX";
35: #endif
36:
37: volatile sig_atomic_t sigwinch;
38: volatile sig_atomic_t sigterm;
39: volatile sig_atomic_t sigcont;
40: volatile sig_atomic_t sigchld;
41: volatile sig_atomic_t sigusr1;
42: volatile sig_atomic_t sigusr2;
43:
44: char *cfg_file;
1.12 nicm 45: struct options global_s_options; /* session options */
46: struct options global_w_options; /* window options */
1.29 ! nicm 47: struct environ global_environ;
1.1 nicm 48:
49: int server_locked;
1.19 nicm 50: u_int password_failures;
1.1 nicm 51: char *server_password;
52: time_t server_activity;
53:
54: int debug_level;
55: int be_quiet;
56: time_t start_time;
57: char *socket_path;
58:
59: __dead void usage(void);
60: char *makesockpath(const char *);
1.23 nicm 61: int prepare_unlock(enum msgtype *, void **, size_t *, int);
62: int prepare_cmd(enum msgtype *, void **, size_t *, int, char **);
1.1 nicm 63:
64: __dead void
65: usage(void)
66: {
1.4 sobrado 67: fprintf(stderr,
68: "usage: %s [-28dqUuv] [-f file] [-L socket-name] [-S socket-path]\n"
69: " [command [flags]]\n",
1.1 nicm 70: __progname);
71: exit(1);
72: }
73:
74: void
75: logfile(const char *name)
76: {
77: char *path;
78:
79: log_close();
80: if (debug_level > 0) {
81: xasprintf(
82: &path, "%s-%s-%ld.log", __progname, name, (long) getpid());
83: log_open_file(debug_level, path);
84: xfree(path);
85: }
86: }
87:
88: void
89: sighandler(int sig)
90: {
91: int saved_errno;
92:
93: saved_errno = errno;
94: switch (sig) {
95: case SIGWINCH:
96: sigwinch = 1;
97: break;
98: case SIGTERM:
99: sigterm = 1;
100: break;
101: case SIGCHLD:
102: sigchld = 1;
103: break;
104: case SIGCONT:
105: sigcont = 1;
106: break;
107: case SIGUSR1:
108: sigusr1 = 1;
109: break;
110: case SIGUSR2:
111: sigusr2 = 1;
112: break;
113: }
114: errno = saved_errno;
115: }
116:
117: void
118: siginit(void)
119: {
120: struct sigaction act;
121:
122: memset(&act, 0, sizeof act);
123: sigemptyset(&act.sa_mask);
124: act.sa_flags = SA_RESTART;
125:
126: act.sa_handler = SIG_IGN;
127: if (sigaction(SIGPIPE, &act, NULL) != 0)
128: fatal("sigaction failed");
129: if (sigaction(SIGINT, &act, NULL) != 0)
130: fatal("sigaction failed");
131: if (sigaction(SIGTSTP, &act, NULL) != 0)
132: fatal("sigaction failed");
133: if (sigaction(SIGQUIT, &act, NULL) != 0)
134: fatal("sigaction failed");
135:
136: act.sa_handler = sighandler;
137: if (sigaction(SIGWINCH, &act, NULL) != 0)
138: fatal("sigaction failed");
139: if (sigaction(SIGTERM, &act, NULL) != 0)
140: fatal("sigaction failed");
141: if (sigaction(SIGCHLD, &act, NULL) != 0)
142: fatal("sigaction failed");
143: if (sigaction(SIGUSR1, &act, NULL) != 0)
144: fatal("sigaction failed");
145: if (sigaction(SIGUSR2, &act, NULL) != 0)
146: fatal("sigaction failed");
147: }
148:
149: void
150: sigreset(void)
151: {
152: struct sigaction act;
153:
154: memset(&act, 0, sizeof act);
155: sigemptyset(&act.sa_mask);
156:
157: act.sa_handler = SIG_DFL;
158: if (sigaction(SIGPIPE, &act, NULL) != 0)
159: fatal("sigaction failed");
160: if (sigaction(SIGUSR1, &act, NULL) != 0)
161: fatal("sigaction failed");
162: if (sigaction(SIGUSR2, &act, NULL) != 0)
163: fatal("sigaction failed");
164: if (sigaction(SIGINT, &act, NULL) != 0)
165: fatal("sigaction failed");
166: if (sigaction(SIGTSTP, &act, NULL) != 0)
167: fatal("sigaction failed");
168: if (sigaction(SIGQUIT, &act, NULL) != 0)
169: fatal("sigaction failed");
170: if (sigaction(SIGWINCH, &act, NULL) != 0)
171: fatal("sigaction failed");
172: if (sigaction(SIGTERM, &act, NULL) != 0)
173: fatal("sigaction failed");
174: if (sigaction(SIGCHLD, &act, NULL) != 0)
175: fatal("sigaction failed");
176: }
177:
178: char *
179: makesockpath(const char *label)
180: {
181: char base[MAXPATHLEN], *path;
182: struct stat sb;
183: u_int uid;
184:
185: uid = getuid();
186: xsnprintf(base, MAXPATHLEN, "%s/%s-%d", _PATH_TMP, __progname, uid);
187:
188: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
189: return (NULL);
190:
191: if (lstat(base, &sb) != 0)
192: return (NULL);
193: if (!S_ISDIR(sb.st_mode)) {
194: errno = ENOTDIR;
195: return (NULL);
196: }
197: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
198: errno = EACCES;
199: return (NULL);
200: }
201:
202: xasprintf(&path, "%s/%s", base, label);
203: return (path);
204: }
205:
206: int
1.23 nicm 207: prepare_unlock(enum msgtype *msg, void **buf, size_t *len, int argc)
1.21 nicm 208: {
209: static struct msg_unlock_data unlockdata;
210: char *pass;
211:
212: if (argc != 0) {
213: log_warnx("can't specify a command when unlocking");
214: return (-1);
215: }
216:
217: if ((pass = getpass("Password: ")) == NULL)
218: return (-1);
219:
220: if (strlen(pass) >= sizeof unlockdata.pass) {
221: log_warnx("password too long");
222: return (-1);
223: }
224:
225: strlcpy(unlockdata.pass, pass, sizeof unlockdata.pass);
226: memset(pass, 0, strlen(pass));
227:
228: *buf = &unlockdata;
229: *len = sizeof unlockdata;
230:
231: *msg = MSG_UNLOCK;
232: return (0);
233: }
234:
235: int
1.23 nicm 236: prepare_cmd(enum msgtype *msg, void **buf, size_t *len, int argc, char **argv)
1.21 nicm 237: {
238: static struct msg_command_data cmddata;
239:
240: client_fill_session(&cmddata);
241:
242: cmddata.argc = argc;
243: if (cmd_pack_argv(argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
244: log_warnx("command too long");
245: return (-1);
246: }
247:
248: *buf = &cmddata;
249: *len = sizeof cmddata;
250:
251: *msg = MSG_COMMAND;
252: return (0);
253: }
254:
255: int
1.1 nicm 256: main(int argc, char **argv)
257: {
258: struct client_ctx cctx;
259: struct cmd_list *cmdlist;
260: struct cmd *cmd;
261: struct pollfd pfd;
1.23 nicm 262: enum msgtype msg;
1.1 nicm 263: struct hdr hdr;
264: struct passwd *pw;
1.21 nicm 265: struct msg_print_data printdata;
1.29 ! nicm 266: char *s, *path, *label, *home, *cause, **var;
1.1 nicm 267: char cwd[MAXPATHLEN];
1.21 nicm 268: void *buf;
269: size_t len;
1.20 nicm 270: int retcode, opt, flags, unlock, cmdflags = 0;
1.1 nicm 271:
272: unlock = flags = 0;
273: label = path = NULL;
274: while ((opt = getopt(argc, argv, "28df:L:qS:uUv")) != -1) {
275: switch (opt) {
276: case '2':
277: flags |= IDENTIFY_256COLOURS;
278: flags &= ~IDENTIFY_88COLOURS;
279: break;
280: case '8':
281: flags |= IDENTIFY_88COLOURS;
282: flags &= ~IDENTIFY_256COLOURS;
283: break;
284: case 'f':
1.2 ray 285: if (cfg_file)
286: xfree(cfg_file);
1.1 nicm 287: cfg_file = xstrdup(optarg);
288: break;
289: case 'L':
290: if (label != NULL)
291: xfree(label);
292: label = xstrdup(optarg);
293: break;
294: case 'S':
295: if (path != NULL)
296: xfree(path);
297: path = xstrdup(optarg);
298: break;
299: case 'q':
300: be_quiet = 1;
301: break;
302: case 'u':
303: flags |= IDENTIFY_UTF8;
304: break;
305: case 'U':
306: unlock = 1;
307: break;
308: case 'd':
309: flags |= IDENTIFY_HASDEFAULTS;
310: break;
311: case 'v':
312: debug_level++;
313: break;
314: default:
315: usage();
316: }
317: }
318: argc -= optind;
319: argv += optind;
320:
321: log_open_tty(debug_level);
322: siginit();
323:
1.29 ! nicm 324: environ_init(&global_environ);
! 325: for (var = environ; *var != NULL; var++)
! 326: environ_put(&global_environ, *var);
! 327:
1.15 nicm 328: if (!(flags & IDENTIFY_UTF8)) {
329: /*
330: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
331: * exist (in that order) to contain UTF-8, it is a safe
332: * assumption that either they are using a UTF-8 terminal, or
333: * if not they know that output from UTF-8-capable programs may
334: * be wrong.
335: */
336: if ((s = getenv("LC_ALL")) == NULL) {
337: if ((s = getenv("LC_CTYPE")) == NULL)
338: s = getenv("LANG");
339: }
1.26 nicm 340: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
341: strcasestr(s, "UTF8") != NULL))
1.15 nicm 342: flags |= IDENTIFY_UTF8;
343: }
344:
1.12 nicm 345: options_init(&global_s_options, NULL);
346: options_set_number(&global_s_options, "bell-action", BELL_ANY);
347: options_set_number(&global_s_options, "buffer-limit", 9);
1.13 nicm 348: options_set_string(&global_s_options, "default-command", "%s", "");
1.14 nicm 349: options_set_string(&global_s_options, "default-terminal", "screen");
1.12 nicm 350: options_set_number(&global_s_options, "display-time", 750);
351: options_set_number(&global_s_options, "history-limit", 2000);
352: options_set_number(&global_s_options, "lock-after-time", 0);
1.27 nicm 353: options_set_number(&global_s_options, "message-attr", 0);
1.12 nicm 354: options_set_number(&global_s_options, "message-bg", 3);
355: options_set_number(&global_s_options, "message-fg", 0);
356: options_set_number(&global_s_options, "prefix", '\002');
357: options_set_number(&global_s_options, "repeat-time", 500);
358: options_set_number(&global_s_options, "set-remain-on-exit", 0);
359: options_set_number(&global_s_options, "set-titles", 0);
360: options_set_number(&global_s_options, "status", 1);
1.27 nicm 361: options_set_number(&global_s_options, "status-attr", 0);
1.12 nicm 362: options_set_number(&global_s_options, "status-bg", 2);
363: options_set_number(&global_s_options, "status-fg", 0);
364: options_set_number(&global_s_options, "status-interval", 15);
365: options_set_number(&global_s_options, "status-keys", MODEKEY_EMACS);
1.18 nicm 366: options_set_number(&global_s_options, "status-justify", 0);
1.28 nicm 367: options_set_string(&global_s_options, "status-left", "[#S]");
368: options_set_number(&global_s_options, "status-left-attr", 0);
369: options_set_number(&global_s_options, "status-left-fg", 8);
370: options_set_number(&global_s_options, "status-left-bg", 8);
1.12 nicm 371: options_set_number(&global_s_options, "status-left-length", 10);
1.1 nicm 372: options_set_string(
1.22 nicm 373: &global_s_options, "status-right", "\"#22T\" %%H:%%M %%d-%%b-%%y");
1.28 nicm 374: options_set_number(&global_s_options, "status-right-attr", 0);
375: options_set_number(&global_s_options, "status-right-fg", 8);
376: options_set_number(&global_s_options, "status-right-bg", 8);
377: options_set_number(&global_s_options, "status-right-length", 40);
1.15 nicm 378: if (flags & IDENTIFY_UTF8)
379: options_set_number(&global_s_options, "status-utf8", 1);
380: else
381: options_set_number(&global_s_options, "status-utf8", 0);
1.25 nicm 382: options_set_string(&global_s_options,
383: "terminal-overrides", "*88col*:colors=88,*256col*:colors=256");
1.29 ! nicm 384: options_set_string(&global_s_options, "update-environment", "DISPLAY");
1.16 nicm 385: options_set_number(&global_s_options, "visual-activity", 0);
386: options_set_number(&global_s_options, "visual-bell", 0);
387: options_set_number(&global_s_options, "visual-content", 0);
1.1 nicm 388:
1.12 nicm 389: options_init(&global_w_options, NULL);
390: options_set_number(&global_w_options, "aggressive-resize", 0);
391: options_set_number(&global_w_options, "automatic-rename", 1);
392: options_set_number(&global_w_options, "clock-mode-colour", 4);
393: options_set_number(&global_w_options, "clock-mode-style", 1);
394: options_set_number(&global_w_options, "force-height", 0);
395: options_set_number(&global_w_options, "force-width", 0);
396: options_set_number(&global_w_options, "main-pane-width", 81);
397: options_set_number(&global_w_options, "main-pane-height", 24);
1.27 nicm 398: options_set_number(&global_w_options, "mode-attr", 0);
1.12 nicm 399: options_set_number(&global_w_options, "mode-bg", 3);
400: options_set_number(&global_w_options, "mode-fg", 0);
401: options_set_number(&global_w_options, "mode-keys", MODEKEY_EMACS);
1.24 nicm 402: options_set_number(&global_w_options, "mode-mouse", 1);
1.12 nicm 403: options_set_number(&global_w_options, "monitor-activity", 0);
404: options_set_string(&global_w_options, "monitor-content", "%s", "");
1.15 nicm 405: if (flags & IDENTIFY_UTF8)
406: options_set_number(&global_w_options, "utf8", 1);
407: else
408: options_set_number(&global_w_options, "utf8", 0);
1.12 nicm 409: options_set_number(&global_w_options, "window-status-attr", 0);
410: options_set_number(&global_w_options, "window-status-bg", 8);
411: options_set_number(&global_w_options, "window-status-fg", 8);
1.17 nicm 412: options_set_number(&global_w_options, "window-status-current-attr", 0);
413: options_set_number(&global_w_options, "window-status-current-bg", 8);
414: options_set_number(&global_w_options, "window-status-current-fg", 8);
1.12 nicm 415: options_set_number(&global_w_options, "xterm-keys", 0);
416: options_set_number(&global_w_options, "remain-on-exit", 0);
1.1 nicm 417:
418: if (cfg_file == NULL) {
419: home = getenv("HOME");
420: if (home == NULL || *home == '\0') {
421: pw = getpwuid(getuid());
422: if (pw != NULL)
423: home = pw->pw_dir;
424: }
425: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
426: if (access(cfg_file, R_OK) != 0) {
427: xfree(cfg_file);
428: cfg_file = NULL;
429: }
430: } else {
431: if (access(cfg_file, R_OK) != 0) {
432: log_warn("%s", cfg_file);
433: exit(1);
434: }
435: }
1.21 nicm 436:
1.1 nicm 437: if (label == NULL)
438: label = xstrdup("default");
439: if (path == NULL && (path = makesockpath(label)) == NULL) {
440: log_warn("can't create socket");
441: exit(1);
442: }
443: xfree(label);
444:
445: if (getcwd(cwd, sizeof cwd) == NULL) {
1.11 nicm 446: pw = getpwuid(getuid());
447: if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
448: strlcpy(cwd, pw->pw_dir, sizeof cwd);
449: else
450: strlcpy(cwd, "/", sizeof cwd);
1.1 nicm 451: }
1.12 nicm 452: options_set_string(&global_s_options, "default-path", "%s", cwd);
1.1 nicm 453:
454: if (unlock) {
1.21 nicm 455: if (prepare_unlock(&msg, &buf, &len, argc) != 0)
1.1 nicm 456: exit(1);
1.21 nicm 457: } else {
458: if (prepare_cmd(&msg, &buf, &len, argc, argv) != 0)
1.1 nicm 459: exit(1);
1.21 nicm 460: }
461:
462: if (unlock)
1.20 nicm 463: cmdflags &= ~CMD_STARTSERVER;
1.21 nicm 464: else if (argc == 0)
465: cmdflags |= CMD_STARTSERVER;
466: else {
467: /*
468: * It sucks parsing the command string twice (in client and
469: * later in server) but it is necessary to get the start server
470: * flag.
471: */
472: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
473: log_warnx("%s", cause);
474: exit(1);
1.1 nicm 475: }
1.21 nicm 476: cmdflags &= ~CMD_STARTSERVER;
1.1 nicm 477: TAILQ_FOREACH(cmd, cmdlist, qentry) {
1.29 ! nicm 478: if (cmd->entry->flags & CMD_STARTSERVER)
1.20 nicm 479: cmdflags |= CMD_STARTSERVER;
1.29 ! nicm 480: if (cmd->entry->flags & CMD_SENDENVIRON)
! 481: cmdflags |= CMD_SENDENVIRON;
1.1 nicm 482: }
1.21 nicm 483: cmd_list_free(cmdlist);
1.1 nicm 484: }
485:
486: memset(&cctx, 0, sizeof cctx);
1.20 nicm 487: if (client_init(path, &cctx, cmdflags, flags) != 0)
1.1 nicm 488: exit(1);
489: xfree(path);
490:
1.21 nicm 491: client_write_server(&cctx, msg, buf, len);
492: memset(buf, 0, len);
1.1 nicm 493:
494: retcode = 0;
495: for (;;) {
496: pfd.fd = cctx.srv_fd;
497: pfd.events = POLLIN;
498: if (BUFFER_USED(cctx.srv_out) > 0)
499: pfd.events |= POLLOUT;
500:
501: if (poll(&pfd, 1, INFTIM) == -1) {
502: if (errno == EAGAIN || errno == EINTR)
503: continue;
504: fatal("poll failed");
505: }
506:
507: if (buffer_poll(&pfd, cctx.srv_in, cctx.srv_out) != 0)
508: goto out;
509:
510: restart:
511: if (BUFFER_USED(cctx.srv_in) < sizeof hdr)
512: continue;
513: memcpy(&hdr, BUFFER_OUT(cctx.srv_in), sizeof hdr);
514: if (BUFFER_USED(cctx.srv_in) < (sizeof hdr) + hdr.size)
515: continue;
516: buffer_remove(cctx.srv_in, sizeof hdr);
517:
518: switch (hdr.type) {
519: case MSG_EXIT:
520: case MSG_SHUTDOWN:
521: goto out;
522: case MSG_ERROR:
523: retcode = 1;
524: /* FALLTHROUGH */
525: case MSG_PRINT:
1.21 nicm 526: if (hdr.size < sizeof printdata)
1.1 nicm 527: fatalx("bad MSG_PRINT size");
1.21 nicm 528: buffer_read(cctx.srv_in, &printdata, sizeof printdata);
529:
530: printdata.msg[(sizeof printdata.msg) - 1] = '\0';
531: log_info("%s", printdata.msg);
1.1 nicm 532: goto restart;
533: case MSG_READY:
534: retcode = client_main(&cctx);
535: goto out;
536: default:
537: fatalx("unexpected command");
538: }
539: }
540:
541: out:
1.12 nicm 542: options_free(&global_s_options);
543: options_free(&global_w_options);
1.1 nicm 544:
545: close(cctx.srv_fd);
546: buffer_destroy(cctx.srv_in);
547: buffer_destroy(cctx.srv_out);
548:
549: return (retcode);
550: }
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