Annotation of src/usr.bin/tmux/tmux.c, Revision 1.23
1.23 ! nicm 1: /* $OpenBSD: tmux.c,v 1.22 2009/07/29 05:36:53 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 *);
1.23 ! nicm 60: int prepare_unlock(enum msgtype *, void **, size_t *, int);
! 61: int prepare_cmd(enum msgtype *, void **, size_t *, int, char **);
1.1 nicm 62:
63: __dead void
64: usage(void)
65: {
1.4 sobrado 66: fprintf(stderr,
67: "usage: %s [-28dqUuv] [-f file] [-L socket-name] [-S socket-path]\n"
68: " [command [flags]]\n",
1.1 nicm 69: __progname);
70: exit(1);
71: }
72:
73: void
74: logfile(const char *name)
75: {
76: char *path;
77:
78: log_close();
79: if (debug_level > 0) {
80: xasprintf(
81: &path, "%s-%s-%ld.log", __progname, name, (long) getpid());
82: log_open_file(debug_level, path);
83: xfree(path);
84: }
85: }
86:
87: void
88: sighandler(int sig)
89: {
90: int saved_errno;
91:
92: saved_errno = errno;
93: switch (sig) {
94: case SIGWINCH:
95: sigwinch = 1;
96: break;
97: case SIGTERM:
98: sigterm = 1;
99: break;
100: case SIGCHLD:
101: sigchld = 1;
102: break;
103: case SIGCONT:
104: sigcont = 1;
105: break;
106: case SIGUSR1:
107: sigusr1 = 1;
108: break;
109: case SIGUSR2:
110: sigusr2 = 1;
111: break;
112: }
113: errno = saved_errno;
114: }
115:
116: void
117: siginit(void)
118: {
119: struct sigaction act;
120:
121: memset(&act, 0, sizeof act);
122: sigemptyset(&act.sa_mask);
123: act.sa_flags = SA_RESTART;
124:
125: act.sa_handler = SIG_IGN;
126: if (sigaction(SIGPIPE, &act, NULL) != 0)
127: fatal("sigaction failed");
128: if (sigaction(SIGINT, &act, NULL) != 0)
129: fatal("sigaction failed");
130: if (sigaction(SIGTSTP, &act, NULL) != 0)
131: fatal("sigaction failed");
132: if (sigaction(SIGQUIT, &act, NULL) != 0)
133: fatal("sigaction failed");
134:
135: act.sa_handler = sighandler;
136: if (sigaction(SIGWINCH, &act, NULL) != 0)
137: fatal("sigaction failed");
138: if (sigaction(SIGTERM, &act, NULL) != 0)
139: fatal("sigaction failed");
140: if (sigaction(SIGCHLD, &act, NULL) != 0)
141: fatal("sigaction failed");
142: if (sigaction(SIGUSR1, &act, NULL) != 0)
143: fatal("sigaction failed");
144: if (sigaction(SIGUSR2, &act, NULL) != 0)
145: fatal("sigaction failed");
146: }
147:
148: void
149: sigreset(void)
150: {
151: struct sigaction act;
152:
153: memset(&act, 0, sizeof act);
154: sigemptyset(&act.sa_mask);
155:
156: act.sa_handler = SIG_DFL;
157: if (sigaction(SIGPIPE, &act, NULL) != 0)
158: fatal("sigaction failed");
159: if (sigaction(SIGUSR1, &act, NULL) != 0)
160: fatal("sigaction failed");
161: if (sigaction(SIGUSR2, &act, NULL) != 0)
162: fatal("sigaction failed");
163: if (sigaction(SIGINT, &act, NULL) != 0)
164: fatal("sigaction failed");
165: if (sigaction(SIGTSTP, &act, NULL) != 0)
166: fatal("sigaction failed");
167: if (sigaction(SIGQUIT, &act, NULL) != 0)
168: fatal("sigaction failed");
169: if (sigaction(SIGWINCH, &act, NULL) != 0)
170: fatal("sigaction failed");
171: if (sigaction(SIGTERM, &act, NULL) != 0)
172: fatal("sigaction failed");
173: if (sigaction(SIGCHLD, &act, NULL) != 0)
174: fatal("sigaction failed");
175: }
176:
177: char *
178: makesockpath(const char *label)
179: {
180: char base[MAXPATHLEN], *path;
181: struct stat sb;
182: u_int uid;
183:
184: uid = getuid();
185: xsnprintf(base, MAXPATHLEN, "%s/%s-%d", _PATH_TMP, __progname, uid);
186:
187: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
188: return (NULL);
189:
190: if (lstat(base, &sb) != 0)
191: return (NULL);
192: if (!S_ISDIR(sb.st_mode)) {
193: errno = ENOTDIR;
194: return (NULL);
195: }
196: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
197: errno = EACCES;
198: return (NULL);
199: }
200:
201: xasprintf(&path, "%s/%s", base, label);
202: return (path);
203: }
204:
205: int
1.23 ! nicm 206: prepare_unlock(enum msgtype *msg, void **buf, size_t *len, int argc)
1.21 nicm 207: {
208: static struct msg_unlock_data unlockdata;
209: char *pass;
210:
211: if (argc != 0) {
212: log_warnx("can't specify a command when unlocking");
213: return (-1);
214: }
215:
216: if ((pass = getpass("Password: ")) == NULL)
217: return (-1);
218:
219: if (strlen(pass) >= sizeof unlockdata.pass) {
220: log_warnx("password too long");
221: return (-1);
222: }
223:
224: strlcpy(unlockdata.pass, pass, sizeof unlockdata.pass);
225: memset(pass, 0, strlen(pass));
226:
227: *buf = &unlockdata;
228: *len = sizeof unlockdata;
229:
230: *msg = MSG_UNLOCK;
231: return (0);
232: }
233:
234: int
1.23 ! nicm 235: prepare_cmd(enum msgtype *msg, void **buf, size_t *len, int argc, char **argv)
1.21 nicm 236: {
237: static struct msg_command_data cmddata;
238:
239: client_fill_session(&cmddata);
240:
241: cmddata.argc = argc;
242: if (cmd_pack_argv(argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
243: log_warnx("command too long");
244: return (-1);
245: }
246:
247: *buf = &cmddata;
248: *len = sizeof cmddata;
249:
250: *msg = MSG_COMMAND;
251: return (0);
252: }
253:
254: int
1.1 nicm 255: main(int argc, char **argv)
256: {
257: struct client_ctx cctx;
258: struct cmd_list *cmdlist;
259: struct cmd *cmd;
260: struct pollfd pfd;
1.23 ! nicm 261: enum msgtype msg;
1.1 nicm 262: struct hdr hdr;
263: struct passwd *pw;
1.21 nicm 264: struct msg_print_data printdata;
265: char *s, *path, *label, *home, *cause;
1.1 nicm 266: char cwd[MAXPATHLEN];
1.21 nicm 267: void *buf;
268: size_t len;
1.20 nicm 269: int retcode, opt, flags, unlock, cmdflags = 0;
1.1 nicm 270:
271: unlock = flags = 0;
272: label = path = NULL;
273: while ((opt = getopt(argc, argv, "28df:L:qS:uUv")) != -1) {
274: switch (opt) {
275: case '2':
276: flags |= IDENTIFY_256COLOURS;
277: flags &= ~IDENTIFY_88COLOURS;
278: break;
279: case '8':
280: flags |= IDENTIFY_88COLOURS;
281: flags &= ~IDENTIFY_256COLOURS;
282: break;
283: case 'f':
1.2 ray 284: if (cfg_file)
285: xfree(cfg_file);
1.1 nicm 286: cfg_file = xstrdup(optarg);
287: break;
288: case 'L':
289: if (label != NULL)
290: xfree(label);
291: label = xstrdup(optarg);
292: break;
293: case 'S':
294: if (path != NULL)
295: xfree(path);
296: path = xstrdup(optarg);
297: break;
298: case 'q':
299: be_quiet = 1;
300: break;
301: case 'u':
302: flags |= IDENTIFY_UTF8;
303: break;
304: case 'U':
305: unlock = 1;
306: break;
307: case 'd':
308: flags |= IDENTIFY_HASDEFAULTS;
309: break;
310: case 'v':
311: debug_level++;
312: break;
313: default:
314: usage();
315: }
316: }
317: argc -= optind;
318: argv += optind;
319:
320: log_open_tty(debug_level);
321: siginit();
322:
1.15 nicm 323: if (!(flags & IDENTIFY_UTF8)) {
324: /*
325: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
326: * exist (in that order) to contain UTF-8, it is a safe
327: * assumption that either they are using a UTF-8 terminal, or
328: * if not they know that output from UTF-8-capable programs may
329: * be wrong.
330: */
331: if ((s = getenv("LC_ALL")) == NULL) {
332: if ((s = getenv("LC_CTYPE")) == NULL)
333: s = getenv("LANG");
334: }
335: if (s != NULL && strcasestr(s, "UTF-8") != NULL)
336: flags |= IDENTIFY_UTF8;
337: }
338:
1.12 nicm 339: options_init(&global_s_options, NULL);
340: options_set_number(&global_s_options, "bell-action", BELL_ANY);
341: options_set_number(&global_s_options, "buffer-limit", 9);
1.13 nicm 342: options_set_string(&global_s_options, "default-command", "%s", "");
1.14 nicm 343: options_set_string(&global_s_options, "default-terminal", "screen");
1.12 nicm 344: options_set_number(&global_s_options, "display-time", 750);
345: options_set_number(&global_s_options, "history-limit", 2000);
346: options_set_number(&global_s_options, "lock-after-time", 0);
347: options_set_number(&global_s_options, "message-attr", GRID_ATTR_REVERSE);
348: options_set_number(&global_s_options, "message-bg", 3);
349: options_set_number(&global_s_options, "message-fg", 0);
350: options_set_number(&global_s_options, "prefix", '\002');
351: options_set_number(&global_s_options, "repeat-time", 500);
352: options_set_number(&global_s_options, "set-remain-on-exit", 0);
353: options_set_number(&global_s_options, "set-titles", 0);
354: options_set_number(&global_s_options, "status", 1);
355: options_set_number(&global_s_options, "status-attr", GRID_ATTR_REVERSE);
356: options_set_number(&global_s_options, "status-bg", 2);
357: options_set_number(&global_s_options, "status-fg", 0);
358: options_set_number(&global_s_options, "status-interval", 15);
359: options_set_number(&global_s_options, "status-keys", MODEKEY_EMACS);
1.18 nicm 360: options_set_number(&global_s_options, "status-justify", 0);
1.12 nicm 361: options_set_number(&global_s_options, "status-left-length", 10);
362: options_set_number(&global_s_options, "status-right-length", 40);
363: options_set_string(&global_s_options, "status-left", "[#S]");
1.1 nicm 364: options_set_string(
1.22 nicm 365: &global_s_options, "status-right", "\"#22T\" %%H:%%M %%d-%%b-%%y");
1.15 nicm 366: if (flags & IDENTIFY_UTF8)
367: options_set_number(&global_s_options, "status-utf8", 1);
368: else
369: options_set_number(&global_s_options, "status-utf8", 0);
1.16 nicm 370: options_set_number(&global_s_options, "visual-activity", 0);
371: options_set_number(&global_s_options, "visual-bell", 0);
372: options_set_number(&global_s_options, "visual-content", 0);
1.1 nicm 373:
1.12 nicm 374: options_init(&global_w_options, NULL);
375: options_set_number(&global_w_options, "aggressive-resize", 0);
376: options_set_number(&global_w_options, "automatic-rename", 1);
377: options_set_number(&global_w_options, "clock-mode-colour", 4);
378: options_set_number(&global_w_options, "clock-mode-style", 1);
379: options_set_number(&global_w_options, "force-height", 0);
380: options_set_number(&global_w_options, "force-width", 0);
381: options_set_number(&global_w_options, "mode-attr", GRID_ATTR_REVERSE);
382: options_set_number(&global_w_options, "main-pane-width", 81);
383: options_set_number(&global_w_options, "main-pane-height", 24);
384: options_set_number(&global_w_options, "mode-bg", 3);
385: options_set_number(&global_w_options, "mode-fg", 0);
386: options_set_number(&global_w_options, "mode-keys", MODEKEY_EMACS);
387: options_set_number(&global_w_options, "monitor-activity", 0);
388: options_set_string(&global_w_options, "monitor-content", "%s", "");
1.15 nicm 389: if (flags & IDENTIFY_UTF8)
390: options_set_number(&global_w_options, "utf8", 1);
391: else
392: options_set_number(&global_w_options, "utf8", 0);
1.12 nicm 393: options_set_number(&global_w_options, "window-status-attr", 0);
394: options_set_number(&global_w_options, "window-status-bg", 8);
395: options_set_number(&global_w_options, "window-status-fg", 8);
1.17 nicm 396: options_set_number(&global_w_options, "window-status-current-attr", 0);
397: options_set_number(&global_w_options, "window-status-current-bg", 8);
398: options_set_number(&global_w_options, "window-status-current-fg", 8);
1.12 nicm 399: options_set_number(&global_w_options, "xterm-keys", 0);
400: options_set_number(&global_w_options, "remain-on-exit", 0);
1.1 nicm 401:
402: if (cfg_file == NULL) {
403: home = getenv("HOME");
404: if (home == NULL || *home == '\0') {
405: pw = getpwuid(getuid());
406: if (pw != NULL)
407: home = pw->pw_dir;
408: }
409: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
410: if (access(cfg_file, R_OK) != 0) {
411: xfree(cfg_file);
412: cfg_file = NULL;
413: }
414: } else {
415: if (access(cfg_file, R_OK) != 0) {
416: log_warn("%s", cfg_file);
417: exit(1);
418: }
419: }
1.21 nicm 420:
1.1 nicm 421: if (label == NULL)
422: label = xstrdup("default");
423: if (path == NULL && (path = makesockpath(label)) == NULL) {
424: log_warn("can't create socket");
425: exit(1);
426: }
427: xfree(label);
428:
429: if (getcwd(cwd, sizeof cwd) == NULL) {
1.11 nicm 430: pw = getpwuid(getuid());
431: if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
432: strlcpy(cwd, pw->pw_dir, sizeof cwd);
433: else
434: strlcpy(cwd, "/", sizeof cwd);
1.1 nicm 435: }
1.12 nicm 436: options_set_string(&global_s_options, "default-path", "%s", cwd);
1.1 nicm 437:
438: if (unlock) {
1.21 nicm 439: if (prepare_unlock(&msg, &buf, &len, argc) != 0)
1.1 nicm 440: exit(1);
1.21 nicm 441: } else {
442: if (prepare_cmd(&msg, &buf, &len, argc, argv) != 0)
1.1 nicm 443: exit(1);
1.21 nicm 444: }
445:
446: if (unlock)
1.20 nicm 447: cmdflags &= ~CMD_STARTSERVER;
1.21 nicm 448: else if (argc == 0)
449: cmdflags |= CMD_STARTSERVER;
450: else {
451: /*
452: * It sucks parsing the command string twice (in client and
453: * later in server) but it is necessary to get the start server
454: * flag.
455: */
456: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
457: log_warnx("%s", cause);
458: exit(1);
1.1 nicm 459: }
1.21 nicm 460: cmdflags &= ~CMD_STARTSERVER;
1.1 nicm 461: TAILQ_FOREACH(cmd, cmdlist, qentry) {
462: if (cmd->entry->flags & CMD_STARTSERVER) {
1.20 nicm 463: cmdflags |= CMD_STARTSERVER;
1.1 nicm 464: break;
465: }
466: }
1.21 nicm 467: cmd_list_free(cmdlist);
1.1 nicm 468: }
469:
470: memset(&cctx, 0, sizeof cctx);
1.20 nicm 471: if (client_init(path, &cctx, cmdflags, flags) != 0)
1.1 nicm 472: exit(1);
473: xfree(path);
474:
1.21 nicm 475: client_write_server(&cctx, msg, buf, len);
476: memset(buf, 0, len);
1.1 nicm 477:
478: retcode = 0;
479: for (;;) {
480: pfd.fd = cctx.srv_fd;
481: pfd.events = POLLIN;
482: if (BUFFER_USED(cctx.srv_out) > 0)
483: pfd.events |= POLLOUT;
484:
485: if (poll(&pfd, 1, INFTIM) == -1) {
486: if (errno == EAGAIN || errno == EINTR)
487: continue;
488: fatal("poll failed");
489: }
490:
491: if (buffer_poll(&pfd, cctx.srv_in, cctx.srv_out) != 0)
492: goto out;
493:
494: restart:
495: if (BUFFER_USED(cctx.srv_in) < sizeof hdr)
496: continue;
497: memcpy(&hdr, BUFFER_OUT(cctx.srv_in), sizeof hdr);
498: if (BUFFER_USED(cctx.srv_in) < (sizeof hdr) + hdr.size)
499: continue;
500: buffer_remove(cctx.srv_in, sizeof hdr);
501:
502: switch (hdr.type) {
503: case MSG_EXIT:
504: case MSG_SHUTDOWN:
505: goto out;
506: case MSG_ERROR:
507: retcode = 1;
508: /* FALLTHROUGH */
509: case MSG_PRINT:
1.21 nicm 510: if (hdr.size < sizeof printdata)
1.1 nicm 511: fatalx("bad MSG_PRINT size");
1.21 nicm 512: buffer_read(cctx.srv_in, &printdata, sizeof printdata);
513:
514: printdata.msg[(sizeof printdata.msg) - 1] = '\0';
515: log_info("%s", printdata.msg);
1.1 nicm 516: goto restart;
517: case MSG_READY:
518: retcode = client_main(&cctx);
519: goto out;
520: default:
521: fatalx("unexpected command");
522: }
523: }
524:
525: out:
1.12 nicm 526: options_free(&global_s_options);
527: options_free(&global_w_options);
1.1 nicm 528:
529: close(cctx.srv_fd);
530: buffer_destroy(cctx.srv_in);
531: buffer_destroy(cctx.srv_out);
532:
533: return (retcode);
534: }
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