Annotation of src/usr.bin/tmux/tmux.c, Revision 1.8
1.8 ! nicm 1: /* $OpenBSD: tmux.c,v 1.7 2009/06/04 21:56:14 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;
45: struct options global_options;
46: struct options global_window_options;
47:
48: int server_locked;
49: char *server_password;
50: time_t server_activity;
51:
52: int debug_level;
53: int be_quiet;
54: time_t start_time;
55: char *socket_path;
56:
57: __dead void usage(void);
58: char *makesockpath(const char *);
59:
60: __dead void
61: usage(void)
62: {
1.4 sobrado 63: fprintf(stderr,
64: "usage: %s [-28dqUuv] [-f file] [-L socket-name] [-S socket-path]\n"
65: " [command [flags]]\n",
1.1 nicm 66: __progname);
67: exit(1);
68: }
69:
70: void
71: logfile(const char *name)
72: {
73: char *path;
74:
75: log_close();
76: if (debug_level > 0) {
77: xasprintf(
78: &path, "%s-%s-%ld.log", __progname, name, (long) getpid());
79: log_open_file(debug_level, path);
80: xfree(path);
81: }
82: }
83:
84: void
85: sighandler(int sig)
86: {
87: int saved_errno;
88:
89: saved_errno = errno;
90: switch (sig) {
91: case SIGWINCH:
92: sigwinch = 1;
93: break;
94: case SIGTERM:
95: sigterm = 1;
96: break;
97: case SIGCHLD:
98: sigchld = 1;
99: break;
100: case SIGCONT:
101: sigcont = 1;
102: break;
103: case SIGUSR1:
104: sigusr1 = 1;
105: break;
106: case SIGUSR2:
107: sigusr2 = 1;
108: break;
109: }
110: errno = saved_errno;
111: }
112:
113: void
114: siginit(void)
115: {
116: struct sigaction act;
117:
118: memset(&act, 0, sizeof act);
119: sigemptyset(&act.sa_mask);
120: act.sa_flags = SA_RESTART;
121:
122: act.sa_handler = SIG_IGN;
123: if (sigaction(SIGPIPE, &act, NULL) != 0)
124: fatal("sigaction failed");
125: if (sigaction(SIGINT, &act, NULL) != 0)
126: fatal("sigaction failed");
127: if (sigaction(SIGTSTP, &act, NULL) != 0)
128: fatal("sigaction failed");
129: if (sigaction(SIGQUIT, &act, NULL) != 0)
130: fatal("sigaction failed");
131:
132: act.sa_handler = sighandler;
133: if (sigaction(SIGWINCH, &act, NULL) != 0)
134: fatal("sigaction failed");
135: if (sigaction(SIGTERM, &act, NULL) != 0)
136: fatal("sigaction failed");
137: if (sigaction(SIGCHLD, &act, NULL) != 0)
138: fatal("sigaction failed");
139: if (sigaction(SIGUSR1, &act, NULL) != 0)
140: fatal("sigaction failed");
141: if (sigaction(SIGUSR2, &act, NULL) != 0)
142: fatal("sigaction failed");
143: }
144:
145: void
146: sigreset(void)
147: {
148: struct sigaction act;
149:
150: memset(&act, 0, sizeof act);
151: sigemptyset(&act.sa_mask);
152:
153: act.sa_handler = SIG_DFL;
154: if (sigaction(SIGPIPE, &act, NULL) != 0)
155: fatal("sigaction failed");
156: if (sigaction(SIGUSR1, &act, NULL) != 0)
157: fatal("sigaction failed");
158: if (sigaction(SIGUSR2, &act, NULL) != 0)
159: fatal("sigaction failed");
160: if (sigaction(SIGINT, &act, NULL) != 0)
161: fatal("sigaction failed");
162: if (sigaction(SIGTSTP, &act, NULL) != 0)
163: fatal("sigaction failed");
164: if (sigaction(SIGQUIT, &act, NULL) != 0)
165: fatal("sigaction failed");
166: if (sigaction(SIGWINCH, &act, NULL) != 0)
167: fatal("sigaction failed");
168: if (sigaction(SIGTERM, &act, NULL) != 0)
169: fatal("sigaction failed");
170: if (sigaction(SIGCHLD, &act, NULL) != 0)
171: fatal("sigaction failed");
172: }
173:
174: char *
175: makesockpath(const char *label)
176: {
177: char base[MAXPATHLEN], *path;
178: struct stat sb;
179: u_int uid;
180:
181: uid = getuid();
182: xsnprintf(base, MAXPATHLEN, "%s/%s-%d", _PATH_TMP, __progname, uid);
183:
184: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
185: return (NULL);
186:
187: if (lstat(base, &sb) != 0)
188: return (NULL);
189: if (!S_ISDIR(sb.st_mode)) {
190: errno = ENOTDIR;
191: return (NULL);
192: }
193: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
194: errno = EACCES;
195: return (NULL);
196: }
197:
198: xasprintf(&path, "%s/%s", base, label);
199: return (path);
200: }
201:
202: int
203: main(int argc, char **argv)
204: {
205: struct client_ctx cctx;
206: struct msg_command_data cmddata;
207: struct buffer *b;
208: struct cmd_list *cmdlist;
209: struct cmd *cmd;
210: struct pollfd pfd;
211: struct hdr hdr;
212: const char *shell;
213: struct passwd *pw;
214: char *s, *path, *label, *cause, *home, *pass = NULL;
215: char cwd[MAXPATHLEN];
216: int retcode, opt, flags, unlock, start_server;
217:
218: unlock = flags = 0;
219: label = path = NULL;
220: while ((opt = getopt(argc, argv, "28df:L:qS:uUv")) != -1) {
221: switch (opt) {
222: case '2':
223: flags |= IDENTIFY_256COLOURS;
224: flags &= ~IDENTIFY_88COLOURS;
225: break;
226: case '8':
227: flags |= IDENTIFY_88COLOURS;
228: flags &= ~IDENTIFY_256COLOURS;
229: break;
230: case 'f':
1.2 ray 231: if (cfg_file)
232: xfree(cfg_file);
1.1 nicm 233: cfg_file = xstrdup(optarg);
234: break;
235: case 'L':
236: if (path != NULL) {
237: log_warnx("-L and -S cannot be used together");
238: exit(1);
239: }
240: if (label != NULL)
241: xfree(label);
242: label = xstrdup(optarg);
243: break;
244: case 'S':
245: if (label != NULL) {
246: log_warnx("-L and -S cannot be used together");
247: exit(1);
248: }
249: if (path != NULL)
250: xfree(path);
251: path = xstrdup(optarg);
252: break;
253: case 'q':
254: be_quiet = 1;
255: break;
256: case 'u':
257: flags |= IDENTIFY_UTF8;
258: break;
259: case 'U':
260: unlock = 1;
261: break;
262: case 'd':
263: flags |= IDENTIFY_HASDEFAULTS;
264: break;
265: case 'v':
266: debug_level++;
267: break;
268: default:
269: usage();
270: }
271: }
272: argc -= optind;
273: argv += optind;
274:
275: log_open_tty(debug_level);
276: siginit();
277:
278: options_init(&global_options, NULL);
279: options_set_number(&global_options, "bell-action", BELL_ANY);
280: options_set_number(&global_options, "buffer-limit", 9);
281: options_set_number(&global_options, "display-time", 750);
282: options_set_number(&global_options, "history-limit", 2000);
283: options_set_number(&global_options, "lock-after-time", 0);
284: options_set_number(&global_options, "message-attr", GRID_ATTR_REVERSE);
285: options_set_number(&global_options, "message-bg", 3);
286: options_set_number(&global_options, "message-fg", 0);
287: options_set_number(&global_options, "prefix", '\002');
288: options_set_number(&global_options, "repeat-time", 500);
289: options_set_number(&global_options, "set-remain-on-exit", 0);
1.6 nicm 290: options_set_number(&global_options, "set-titles", 0);
1.1 nicm 291: options_set_number(&global_options, "status", 1);
292: options_set_number(&global_options, "status-attr", GRID_ATTR_REVERSE);
293: options_set_number(&global_options, "status-bg", 2);
294: options_set_number(&global_options, "status-fg", 0);
295: options_set_number(&global_options, "status-interval", 15);
296: options_set_number(&global_options, "status-keys", MODEKEY_EMACS);
297: options_set_number(&global_options, "status-left-length", 10);
298: options_set_number(&global_options, "status-right-length", 40);
299: options_set_string(&global_options, "status-left", "[#S]");
300: options_set_string(
301: &global_options, "status-right", "\"#24T\" %%H:%%M %%d-%%b-%%y");
1.5 nicm 302: options_set_number(&global_options, "status-utf8", 0);
1.1 nicm 303:
304: options_init(&global_window_options, NULL);
305: options_set_number(&global_window_options, "aggressive-resize", 0);
306: options_set_number(&global_window_options, "automatic-rename", 1);
307: options_set_number(&global_window_options, "clock-mode-colour", 4);
308: options_set_number(&global_window_options, "clock-mode-style", 1);
309: options_set_number(&global_window_options, "force-height", 0);
310: options_set_number(&global_window_options, "force-width", 0);
311: options_set_number(
312: &global_window_options, "mode-attr", GRID_ATTR_REVERSE);
313: options_set_number(&global_window_options, "main-pane-width", 81);
314: options_set_number(&global_window_options, "main-pane-height", 24);
315: options_set_number(&global_window_options, "mode-bg", 3);
316: options_set_number(&global_window_options, "mode-fg", 0);
317: options_set_number(&global_window_options, "mode-keys", MODEKEY_EMACS);
318: options_set_number(&global_window_options, "monitor-activity", 0);
319: options_set_string(&global_window_options, "monitor-content", "%s", "");
320: options_set_number(&global_window_options, "utf8", 0);
321: options_set_number(&global_window_options, "window-status-attr", 0);
322: options_set_number(&global_window_options, "window-status-bg", 8);
323: options_set_number(&global_window_options, "window-status-fg", 8);
324: options_set_number(&global_window_options, "xterm-keys", 0);
325: options_set_number(&global_window_options, "remain-on-exit", 0);
326:
327: if (!(flags & IDENTIFY_UTF8)) {
328: /*
1.8 ! nicm 329: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
! 330: * exist (in that order) to contain UTF-8, it is a safe
1.1 nicm 331: * assumption that either they are using a UTF-8 terminal, or
332: * if not they know that output from UTF-8-capable programs may
333: * be wrong.
334: */
1.8 ! nicm 335: if ((s = getenv("LC_CTYPE")) == NULL) {
! 336: if ((s = getenv("LC_ALL")) == NULL)
! 337: s = getenv("LANG");
! 338: }
! 339: if (s != NULL && strcasestr(s, "UTF-8") != NULL)
1.1 nicm 340: flags |= IDENTIFY_UTF8;
341: }
342:
343: if (cfg_file == NULL) {
344: home = getenv("HOME");
345: if (home == NULL || *home == '\0') {
346: pw = getpwuid(getuid());
347: if (pw != NULL)
348: home = pw->pw_dir;
349: }
350: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
351: if (access(cfg_file, R_OK) != 0) {
352: xfree(cfg_file);
353: cfg_file = NULL;
354: }
355: } else {
356: if (access(cfg_file, R_OK) != 0) {
357: log_warn("%s", cfg_file);
358: exit(1);
359: }
360: }
361:
362: if (label == NULL)
363: label = xstrdup("default");
364: if (path == NULL && (path = makesockpath(label)) == NULL) {
365: log_warn("can't create socket");
366: exit(1);
367: }
368: xfree(label);
369:
370: shell = getenv("SHELL");
371: if (shell == NULL || *shell == '\0') {
372: pw = getpwuid(getuid());
373: if (pw != NULL)
374: shell = pw->pw_shell;
375: if (shell == NULL || *shell == '\0')
376: shell = _PATH_BSHELL;
377: }
378: options_set_string(
1.3 pyr 379: &global_options, "default-command", "exec %s -l", shell);
1.1 nicm 380:
381: if (getcwd(cwd, sizeof cwd) == NULL) {
382: log_warn("getcwd");
383: exit(1);
384: }
385: options_set_string(&global_options, "default-path", "%s", cwd);
386:
387: if (unlock) {
388: if (argc != 0) {
389: log_warnx("can't specify a command when unlocking");
390: exit(1);
391: }
392: cmdlist = NULL;
393: if ((pass = getpass("Password: ")) == NULL)
394: exit(1);
395: start_server = 0;
396: } else {
397: if (argc == 0) {
398: cmd = xmalloc(sizeof *cmd);
399: cmd->entry = &cmd_new_session_entry;
400: cmd->entry->init(cmd, 0);
401:
402: cmdlist = xmalloc(sizeof *cmdlist);
403: TAILQ_INIT(cmdlist);
404: TAILQ_INSERT_HEAD(cmdlist, cmd, qentry);
405: } else {
406: cmdlist = cmd_list_parse(argc, argv, &cause);
407: if (cmdlist == NULL) {
408: log_warnx("%s", cause);
409: exit(1);
410: }
411: }
412: start_server = 0;
413: TAILQ_FOREACH(cmd, cmdlist, qentry) {
414: if (cmd->entry->flags & CMD_STARTSERVER) {
415: start_server = 1;
416: break;
417: }
418: }
419: }
420:
421: memset(&cctx, 0, sizeof cctx);
422: if (client_init(path, &cctx, start_server, flags) != 0)
423: exit(1);
424: xfree(path);
425:
426: b = buffer_create(BUFSIZ);
427: if (unlock) {
428: cmd_send_string(b, pass);
1.7 nicm 429: memset(pass, 0, strlen(pass));
1.1 nicm 430: client_write_server(
431: &cctx, MSG_UNLOCK, BUFFER_OUT(b), BUFFER_USED(b));
432: } else {
433: cmd_list_send(cmdlist, b);
434: cmd_list_free(cmdlist);
435: client_fill_session(&cmddata);
436: client_write_server2(&cctx, MSG_COMMAND,
437: &cmddata, sizeof cmddata, BUFFER_OUT(b), BUFFER_USED(b));
438: }
439: buffer_destroy(b);
440:
441: retcode = 0;
442: for (;;) {
443: pfd.fd = cctx.srv_fd;
444: pfd.events = POLLIN;
445: if (BUFFER_USED(cctx.srv_out) > 0)
446: pfd.events |= POLLOUT;
447:
448: if (poll(&pfd, 1, INFTIM) == -1) {
449: if (errno == EAGAIN || errno == EINTR)
450: continue;
451: fatal("poll failed");
452: }
453:
454: if (buffer_poll(&pfd, cctx.srv_in, cctx.srv_out) != 0)
455: goto out;
456:
457: restart:
458: if (BUFFER_USED(cctx.srv_in) < sizeof hdr)
459: continue;
460: memcpy(&hdr, BUFFER_OUT(cctx.srv_in), sizeof hdr);
461: if (BUFFER_USED(cctx.srv_in) < (sizeof hdr) + hdr.size)
462: continue;
463: buffer_remove(cctx.srv_in, sizeof hdr);
464:
465: switch (hdr.type) {
466: case MSG_EXIT:
467: case MSG_SHUTDOWN:
468: goto out;
469: case MSG_ERROR:
470: retcode = 1;
471: /* FALLTHROUGH */
472: case MSG_PRINT:
473: if (hdr.size > INT_MAX - 1)
474: fatalx("bad MSG_PRINT size");
475: log_info("%.*s",
476: (int) hdr.size, BUFFER_OUT(cctx.srv_in));
477: if (hdr.size != 0)
478: buffer_remove(cctx.srv_in, hdr.size);
479: goto restart;
480: case MSG_READY:
481: retcode = client_main(&cctx);
482: goto out;
483: default:
484: fatalx("unexpected command");
485: }
486: }
487:
488: out:
489: options_free(&global_options);
490: options_free(&global_window_options);
491:
492: close(cctx.srv_fd);
493: buffer_destroy(cctx.srv_in);
494: buffer_destroy(cctx.srv_out);
495:
496: return (retcode);
497: }