Annotation of src/usr.bin/tmux/tmux.c, Revision 1.20
1.20 ! nicm 1: /* $OpenBSD: tmux.c,v 1.19 2009/07/20 14:37:51 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 */
1.1 nicm 47:
48: int server_locked;
1.19 nicm 49: u_int password_failures;
1.1 nicm 50: char *server_password;
51: time_t server_activity;
52:
53: int debug_level;
54: int be_quiet;
55: time_t start_time;
56: char *socket_path;
57:
58: __dead void usage(void);
59: char *makesockpath(const char *);
60:
61: __dead void
62: usage(void)
63: {
1.4 sobrado 64: fprintf(stderr,
65: "usage: %s [-28dqUuv] [-f file] [-L socket-name] [-S socket-path]\n"
66: " [command [flags]]\n",
1.1 nicm 67: __progname);
68: exit(1);
69: }
70:
71: void
72: logfile(const char *name)
73: {
74: char *path;
75:
76: log_close();
77: if (debug_level > 0) {
78: xasprintf(
79: &path, "%s-%s-%ld.log", __progname, name, (long) getpid());
80: log_open_file(debug_level, path);
81: xfree(path);
82: }
83: }
84:
85: void
86: sighandler(int sig)
87: {
88: int saved_errno;
89:
90: saved_errno = errno;
91: switch (sig) {
92: case SIGWINCH:
93: sigwinch = 1;
94: break;
95: case SIGTERM:
96: sigterm = 1;
97: break;
98: case SIGCHLD:
99: sigchld = 1;
100: break;
101: case SIGCONT:
102: sigcont = 1;
103: break;
104: case SIGUSR1:
105: sigusr1 = 1;
106: break;
107: case SIGUSR2:
108: sigusr2 = 1;
109: break;
110: }
111: errno = saved_errno;
112: }
113:
114: void
115: siginit(void)
116: {
117: struct sigaction act;
118:
119: memset(&act, 0, sizeof act);
120: sigemptyset(&act.sa_mask);
121: act.sa_flags = SA_RESTART;
122:
123: act.sa_handler = SIG_IGN;
124: if (sigaction(SIGPIPE, &act, NULL) != 0)
125: fatal("sigaction failed");
126: if (sigaction(SIGINT, &act, NULL) != 0)
127: fatal("sigaction failed");
128: if (sigaction(SIGTSTP, &act, NULL) != 0)
129: fatal("sigaction failed");
130: if (sigaction(SIGQUIT, &act, NULL) != 0)
131: fatal("sigaction failed");
132:
133: act.sa_handler = sighandler;
134: if (sigaction(SIGWINCH, &act, NULL) != 0)
135: fatal("sigaction failed");
136: if (sigaction(SIGTERM, &act, NULL) != 0)
137: fatal("sigaction failed");
138: if (sigaction(SIGCHLD, &act, NULL) != 0)
139: fatal("sigaction failed");
140: if (sigaction(SIGUSR1, &act, NULL) != 0)
141: fatal("sigaction failed");
142: if (sigaction(SIGUSR2, &act, NULL) != 0)
143: fatal("sigaction failed");
144: }
145:
146: void
147: sigreset(void)
148: {
149: struct sigaction act;
150:
151: memset(&act, 0, sizeof act);
152: sigemptyset(&act.sa_mask);
153:
154: act.sa_handler = SIG_DFL;
155: if (sigaction(SIGPIPE, &act, NULL) != 0)
156: fatal("sigaction failed");
157: if (sigaction(SIGUSR1, &act, NULL) != 0)
158: fatal("sigaction failed");
159: if (sigaction(SIGUSR2, &act, NULL) != 0)
160: fatal("sigaction failed");
161: if (sigaction(SIGINT, &act, NULL) != 0)
162: fatal("sigaction failed");
163: if (sigaction(SIGTSTP, &act, NULL) != 0)
164: fatal("sigaction failed");
165: if (sigaction(SIGQUIT, &act, NULL) != 0)
166: fatal("sigaction failed");
167: if (sigaction(SIGWINCH, &act, NULL) != 0)
168: fatal("sigaction failed");
169: if (sigaction(SIGTERM, &act, NULL) != 0)
170: fatal("sigaction failed");
171: if (sigaction(SIGCHLD, &act, NULL) != 0)
172: fatal("sigaction failed");
173: }
174:
175: char *
176: makesockpath(const char *label)
177: {
178: char base[MAXPATHLEN], *path;
179: struct stat sb;
180: u_int uid;
181:
182: uid = getuid();
183: xsnprintf(base, MAXPATHLEN, "%s/%s-%d", _PATH_TMP, __progname, uid);
184:
185: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
186: return (NULL);
187:
188: if (lstat(base, &sb) != 0)
189: return (NULL);
190: if (!S_ISDIR(sb.st_mode)) {
191: errno = ENOTDIR;
192: return (NULL);
193: }
194: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
195: errno = EACCES;
196: return (NULL);
197: }
198:
199: xasprintf(&path, "%s/%s", base, label);
200: return (path);
201: }
202:
203: int
204: main(int argc, char **argv)
205: {
206: struct client_ctx cctx;
207: struct msg_command_data cmddata;
208: struct buffer *b;
209: struct cmd_list *cmdlist;
210: struct cmd *cmd;
211: struct pollfd pfd;
212: struct hdr hdr;
213: struct passwd *pw;
214: char *s, *path, *label, *cause, *home, *pass = NULL;
215: char cwd[MAXPATHLEN];
1.20 ! nicm 216: int retcode, opt, flags, unlock, cmdflags = 0;
1.1 nicm 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 (label != NULL)
237: xfree(label);
238: label = xstrdup(optarg);
239: break;
240: case 'S':
241: if (path != NULL)
242: xfree(path);
243: path = xstrdup(optarg);
244: break;
245: case 'q':
246: be_quiet = 1;
247: break;
248: case 'u':
249: flags |= IDENTIFY_UTF8;
250: break;
251: case 'U':
252: unlock = 1;
253: break;
254: case 'd':
255: flags |= IDENTIFY_HASDEFAULTS;
256: break;
257: case 'v':
258: debug_level++;
259: break;
260: default:
261: usage();
262: }
263: }
264: argc -= optind;
265: argv += optind;
266:
267: log_open_tty(debug_level);
268: siginit();
269:
1.15 nicm 270: if (!(flags & IDENTIFY_UTF8)) {
271: /*
272: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
273: * exist (in that order) to contain UTF-8, it is a safe
274: * assumption that either they are using a UTF-8 terminal, or
275: * if not they know that output from UTF-8-capable programs may
276: * be wrong.
277: */
278: if ((s = getenv("LC_ALL")) == NULL) {
279: if ((s = getenv("LC_CTYPE")) == NULL)
280: s = getenv("LANG");
281: }
282: if (s != NULL && strcasestr(s, "UTF-8") != NULL)
283: flags |= IDENTIFY_UTF8;
284: }
285:
1.12 nicm 286: options_init(&global_s_options, NULL);
287: options_set_number(&global_s_options, "bell-action", BELL_ANY);
288: options_set_number(&global_s_options, "buffer-limit", 9);
1.13 nicm 289: options_set_string(&global_s_options, "default-command", "%s", "");
1.14 nicm 290: options_set_string(&global_s_options, "default-terminal", "screen");
1.12 nicm 291: options_set_number(&global_s_options, "display-time", 750);
292: options_set_number(&global_s_options, "history-limit", 2000);
293: options_set_number(&global_s_options, "lock-after-time", 0);
294: options_set_number(&global_s_options, "message-attr", GRID_ATTR_REVERSE);
295: options_set_number(&global_s_options, "message-bg", 3);
296: options_set_number(&global_s_options, "message-fg", 0);
297: options_set_number(&global_s_options, "prefix", '\002');
298: options_set_number(&global_s_options, "repeat-time", 500);
299: options_set_number(&global_s_options, "set-remain-on-exit", 0);
300: options_set_number(&global_s_options, "set-titles", 0);
301: options_set_number(&global_s_options, "status", 1);
302: options_set_number(&global_s_options, "status-attr", GRID_ATTR_REVERSE);
303: options_set_number(&global_s_options, "status-bg", 2);
304: options_set_number(&global_s_options, "status-fg", 0);
305: options_set_number(&global_s_options, "status-interval", 15);
306: options_set_number(&global_s_options, "status-keys", MODEKEY_EMACS);
1.18 nicm 307: options_set_number(&global_s_options, "status-justify", 0);
1.12 nicm 308: options_set_number(&global_s_options, "status-left-length", 10);
309: options_set_number(&global_s_options, "status-right-length", 40);
310: options_set_string(&global_s_options, "status-left", "[#S]");
1.1 nicm 311: options_set_string(
1.12 nicm 312: &global_s_options, "status-right", "\"#24T\" %%H:%%M %%d-%%b-%%y");
1.15 nicm 313: if (flags & IDENTIFY_UTF8)
314: options_set_number(&global_s_options, "status-utf8", 1);
315: else
316: options_set_number(&global_s_options, "status-utf8", 0);
1.16 nicm 317: options_set_number(&global_s_options, "visual-activity", 0);
318: options_set_number(&global_s_options, "visual-bell", 0);
319: options_set_number(&global_s_options, "visual-content", 0);
1.1 nicm 320:
1.12 nicm 321: options_init(&global_w_options, NULL);
322: options_set_number(&global_w_options, "aggressive-resize", 0);
323: options_set_number(&global_w_options, "automatic-rename", 1);
324: options_set_number(&global_w_options, "clock-mode-colour", 4);
325: options_set_number(&global_w_options, "clock-mode-style", 1);
326: options_set_number(&global_w_options, "force-height", 0);
327: options_set_number(&global_w_options, "force-width", 0);
328: options_set_number(&global_w_options, "mode-attr", GRID_ATTR_REVERSE);
329: options_set_number(&global_w_options, "main-pane-width", 81);
330: options_set_number(&global_w_options, "main-pane-height", 24);
331: options_set_number(&global_w_options, "mode-bg", 3);
332: options_set_number(&global_w_options, "mode-fg", 0);
333: options_set_number(&global_w_options, "mode-keys", MODEKEY_EMACS);
334: options_set_number(&global_w_options, "monitor-activity", 0);
335: options_set_string(&global_w_options, "monitor-content", "%s", "");
1.15 nicm 336: if (flags & IDENTIFY_UTF8)
337: options_set_number(&global_w_options, "utf8", 1);
338: else
339: options_set_number(&global_w_options, "utf8", 0);
1.12 nicm 340: options_set_number(&global_w_options, "window-status-attr", 0);
341: options_set_number(&global_w_options, "window-status-bg", 8);
342: options_set_number(&global_w_options, "window-status-fg", 8);
1.17 nicm 343: options_set_number(&global_w_options, "window-status-current-attr", 0);
344: options_set_number(&global_w_options, "window-status-current-bg", 8);
345: options_set_number(&global_w_options, "window-status-current-fg", 8);
1.12 nicm 346: options_set_number(&global_w_options, "xterm-keys", 0);
347: options_set_number(&global_w_options, "remain-on-exit", 0);
1.1 nicm 348:
349: if (cfg_file == NULL) {
350: home = getenv("HOME");
351: if (home == NULL || *home == '\0') {
352: pw = getpwuid(getuid());
353: if (pw != NULL)
354: home = pw->pw_dir;
355: }
356: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
357: if (access(cfg_file, R_OK) != 0) {
358: xfree(cfg_file);
359: cfg_file = NULL;
360: }
361: } else {
362: if (access(cfg_file, R_OK) != 0) {
363: log_warn("%s", cfg_file);
364: exit(1);
365: }
366: }
367:
368: if (label == NULL)
369: label = xstrdup("default");
370: if (path == NULL && (path = makesockpath(label)) == NULL) {
371: log_warn("can't create socket");
372: exit(1);
373: }
374: xfree(label);
375:
376: if (getcwd(cwd, sizeof cwd) == NULL) {
1.11 nicm 377: pw = getpwuid(getuid());
378: if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
379: strlcpy(cwd, pw->pw_dir, sizeof cwd);
380: else
381: strlcpy(cwd, "/", sizeof cwd);
1.1 nicm 382: }
1.12 nicm 383: options_set_string(&global_s_options, "default-path", "%s", cwd);
1.1 nicm 384:
385: if (unlock) {
386: if (argc != 0) {
387: log_warnx("can't specify a command when unlocking");
388: exit(1);
389: }
390: cmdlist = NULL;
391: if ((pass = getpass("Password: ")) == NULL)
392: exit(1);
1.20 ! nicm 393: cmdflags &= ~CMD_STARTSERVER;
1.1 nicm 394: } else {
395: if (argc == 0) {
396: cmd = xmalloc(sizeof *cmd);
397: cmd->entry = &cmd_new_session_entry;
398: cmd->entry->init(cmd, 0);
399:
400: cmdlist = xmalloc(sizeof *cmdlist);
401: TAILQ_INIT(cmdlist);
402: TAILQ_INSERT_HEAD(cmdlist, cmd, qentry);
403: } else {
404: cmdlist = cmd_list_parse(argc, argv, &cause);
405: if (cmdlist == NULL) {
406: log_warnx("%s", cause);
407: exit(1);
408: }
409: }
410: TAILQ_FOREACH(cmd, cmdlist, qentry) {
411: if (cmd->entry->flags & CMD_STARTSERVER) {
1.20 ! nicm 412: cmdflags |= CMD_STARTSERVER;
1.1 nicm 413: break;
414: }
415: }
416: }
417:
418: memset(&cctx, 0, sizeof cctx);
1.20 ! nicm 419: if (client_init(path, &cctx, cmdflags, flags) != 0)
1.1 nicm 420: exit(1);
421: xfree(path);
422:
423: b = buffer_create(BUFSIZ);
424: if (unlock) {
425: cmd_send_string(b, pass);
1.7 nicm 426: memset(pass, 0, strlen(pass));
1.1 nicm 427: client_write_server(
428: &cctx, MSG_UNLOCK, BUFFER_OUT(b), BUFFER_USED(b));
429: } else {
430: cmd_list_send(cmdlist, b);
431: cmd_list_free(cmdlist);
432: client_fill_session(&cmddata);
433: client_write_server2(&cctx, MSG_COMMAND,
434: &cmddata, sizeof cmddata, BUFFER_OUT(b), BUFFER_USED(b));
435: }
436: buffer_destroy(b);
437:
438: retcode = 0;
439: for (;;) {
440: pfd.fd = cctx.srv_fd;
441: pfd.events = POLLIN;
442: if (BUFFER_USED(cctx.srv_out) > 0)
443: pfd.events |= POLLOUT;
444:
445: if (poll(&pfd, 1, INFTIM) == -1) {
446: if (errno == EAGAIN || errno == EINTR)
447: continue;
448: fatal("poll failed");
449: }
450:
451: if (buffer_poll(&pfd, cctx.srv_in, cctx.srv_out) != 0)
452: goto out;
453:
454: restart:
455: if (BUFFER_USED(cctx.srv_in) < sizeof hdr)
456: continue;
457: memcpy(&hdr, BUFFER_OUT(cctx.srv_in), sizeof hdr);
458: if (BUFFER_USED(cctx.srv_in) < (sizeof hdr) + hdr.size)
459: continue;
460: buffer_remove(cctx.srv_in, sizeof hdr);
461:
462: switch (hdr.type) {
463: case MSG_EXIT:
464: case MSG_SHUTDOWN:
465: goto out;
466: case MSG_ERROR:
467: retcode = 1;
468: /* FALLTHROUGH */
469: case MSG_PRINT:
470: if (hdr.size > INT_MAX - 1)
471: fatalx("bad MSG_PRINT size");
472: log_info("%.*s",
473: (int) hdr.size, BUFFER_OUT(cctx.srv_in));
474: if (hdr.size != 0)
475: buffer_remove(cctx.srv_in, hdr.size);
476: goto restart;
477: case MSG_READY:
478: retcode = client_main(&cctx);
479: goto out;
480: default:
481: fatalx("unexpected command");
482: }
483: }
484:
485: out:
1.12 nicm 486: options_free(&global_s_options);
487: options_free(&global_w_options);
1.1 nicm 488:
489: close(cctx.srv_fd);
490: buffer_destroy(cctx.srv_in);
491: buffer_destroy(cctx.srv_out);
492:
493: return (retcode);
494: }
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