Annotation of src/usr.bin/tmux/tmux.c, Revision 1.108
1.108 ! nicm 1: /* $OpenBSD: tmux.c,v 1.107 2011/10/23 08:34:01 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>
1.55 nicm 23: #include <event.h>
1.91 nicm 24: #include <fcntl.h>
1.1 nicm 25: #include <paths.h>
26: #include <pwd.h>
27: #include <stdlib.h>
28: #include <string.h>
29: #include <unistd.h>
30:
31: #include "tmux.h"
32:
33: #ifdef DEBUG
1.54 nicm 34: extern char *malloc_options;
1.1 nicm 35: #endif
36:
1.63 nicm 37: struct options global_options; /* server options */
1.12 nicm 38: struct options global_s_options; /* session options */
39: struct options global_w_options; /* window options */
1.29 nicm 40: struct environ global_environ;
1.1 nicm 41:
1.78 nicm 42: struct event_base *ev_base;
43:
1.92 nicm 44: char *cfg_file;
45: char *shell_cmd;
1.1 nicm 46: int debug_level;
47: time_t start_time;
1.92 nicm 48: char socket_path[MAXPATHLEN];
1.41 nicm 49: int login_shell;
1.92 nicm 50: char *environ_path;
1.103 nicm 51: pid_t environ_pid = -1;
52: int environ_idx = -1;
1.70 nicm 53:
1.1 nicm 54: __dead void usage(void);
1.92 nicm 55: void parseenvironment(void);
56: char *makesocketpath(const char *);
1.55 nicm 57:
1.1 nicm 58: __dead void
59: usage(void)
60: {
1.4 sobrado 61: fprintf(stderr,
1.52 nicm 62: "usage: %s [-28lquv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 63: " [-S socket-path] [command [flags]]\n",
1.1 nicm 64: __progname);
65: exit(1);
66: }
67:
68: void
69: logfile(const char *name)
70: {
71: char *path;
72:
73: log_close();
74: if (debug_level > 0) {
1.32 nicm 75: xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
1.1 nicm 76: log_open_file(debug_level, path);
77: xfree(path);
78: }
79: }
80:
1.39 nicm 81: const char *
82: getshell(void)
83: {
84: struct passwd *pw;
85: const char *shell;
86:
87: shell = getenv("SHELL");
88: if (checkshell(shell))
89: return (shell);
90:
91: pw = getpwuid(getuid());
92: if (pw != NULL && checkshell(pw->pw_shell))
93: return (pw->pw_shell);
94:
95: return (_PATH_BSHELL);
96: }
97:
98: int
99: checkshell(const char *shell)
100: {
1.105 nicm 101: if (shell == NULL || *shell == '\0' || *shell != '/')
102: return (0);
103: if (areshell(shell))
1.39 nicm 104: return (0);
105: if (access(shell, X_OK) != 0)
106: return (0);
107: return (1);
108: }
109:
110: int
111: areshell(const char *shell)
112: {
113: const char *progname, *ptr;
114:
115: if ((ptr = strrchr(shell, '/')) != NULL)
116: ptr++;
117: else
118: ptr = shell;
119: progname = __progname;
120: if (*progname == '-')
121: progname++;
122: if (strcmp(ptr, progname) == 0)
123: return (1);
124: return (0);
1.107 nicm 125: }
126:
127: const char*
128: get_full_path(const char *wd, const char *path)
129: {
130: static char newpath[MAXPATHLEN];
131: char oldpath[MAXPATHLEN];
132:
133: if (getcwd(oldpath, sizeof oldpath) == NULL)
134: return (NULL);
135: if (chdir(wd) != 0)
136: return (NULL);
137: if (realpath(path, newpath) != 0)
138: return (NULL);
139: chdir(oldpath);
140: return (newpath);
1.39 nicm 141: }
142:
1.50 nicm 143: void
1.92 nicm 144: parseenvironment(void)
1.50 nicm 145: {
1.103 nicm 146: char *env, path[256];
147: long pid;
148: int idx;
1.50 nicm 149:
150: if ((env = getenv("TMUX")) == NULL)
151: return;
152:
1.104 nicm 153: if (sscanf(env, "%255[^,],%ld,%d", path, &pid, &idx) != 3)
1.50 nicm 154: return;
1.103 nicm 155: environ_path = xstrdup(path);
156: environ_pid = pid;
157: environ_idx = idx;
1.50 nicm 158: }
159:
1.1 nicm 160: char *
1.92 nicm 161: makesocketpath(const char *label)
1.1 nicm 162: {
1.102 nicm 163: char base[MAXPATHLEN], *path, *s;
1.1 nicm 164: struct stat sb;
165: u_int uid;
166:
167: uid = getuid();
1.102 nicm 168: if ((s = getenv("TMPDIR")) == NULL || *s == '\0')
169: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
170: else
171: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
1.1 nicm 172:
173: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
174: return (NULL);
175:
176: if (lstat(base, &sb) != 0)
177: return (NULL);
178: if (!S_ISDIR(sb.st_mode)) {
179: errno = ENOTDIR;
180: return (NULL);
181: }
182: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
183: errno = EACCES;
184: return (NULL);
185: }
186:
187: xasprintf(&path, "%s/%s", base, label);
188: return (path);
189: }
190:
1.101 nicm 191: void
192: setblocking(int fd, int state)
193: {
194: int mode;
195:
196: if ((mode = fcntl(fd, F_GETFL)) != -1) {
197: if (!state)
198: mode |= O_NONBLOCK;
199: else
200: mode &= ~O_NONBLOCK;
201: fcntl(fd, F_SETFL, mode);
202: }
203: }
204:
1.55 nicm 205: __dead void
206: shell_exec(const char *shell, const char *shellcmd)
207: {
208: const char *shellname, *ptr;
209: char *argv0;
210:
211: ptr = strrchr(shell, '/');
212: if (ptr != NULL && *(ptr + 1) != '\0')
213: shellname = ptr + 1;
214: else
215: shellname = shell;
216: if (login_shell)
217: xasprintf(&argv0, "-%s", shellname);
218: else
219: xasprintf(&argv0, "%s", shellname);
220: setenv("SHELL", shell, 1);
1.90 nicm 221:
1.101 nicm 222: setblocking(STDIN_FILENO, 1);
223: setblocking(STDOUT_FILENO, 1);
224: setblocking(STDERR_FILENO, 1);
1.90 nicm 225: closefrom(STDERR_FILENO + 1);
1.55 nicm 226:
227: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
228: fatal("execl failed");
229: }
230:
1.1 nicm 231: int
232: main(int argc, char **argv)
233: {
1.92 nicm 234: struct passwd *pw;
235: char *s, *path, *label, *home, **var;
1.94 nicm 236: int opt, flags, quiet, keys;
1.54 nicm 237:
238: #ifdef DEBUG
239: malloc_options = (char *) "AFGJPX";
240: #endif
1.1 nicm 241:
1.94 nicm 242: quiet = flags = 0;
1.92 nicm 243: label = path = NULL;
1.41 nicm 244: login_shell = (**argv == '-');
1.46 nicm 245: while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUv")) != -1) {
1.41 nicm 246: switch (opt) {
1.1 nicm 247: case '2':
248: flags |= IDENTIFY_256COLOURS;
249: flags &= ~IDENTIFY_88COLOURS;
250: break;
251: case '8':
252: flags |= IDENTIFY_88COLOURS;
253: flags &= ~IDENTIFY_256COLOURS;
254: break;
1.46 nicm 255: case 'c':
1.92 nicm 256: if (shell_cmd != NULL)
257: xfree(shell_cmd);
258: shell_cmd = xstrdup(optarg);
1.37 nicm 259: break;
1.1 nicm 260: case 'f':
1.42 nicm 261: if (cfg_file != NULL)
1.2 ray 262: xfree(cfg_file);
1.1 nicm 263: cfg_file = xstrdup(optarg);
1.41 nicm 264: break;
265: case 'l':
266: login_shell = 1;
1.1 nicm 267: break;
268: case 'L':
269: if (label != NULL)
270: xfree(label);
271: label = xstrdup(optarg);
272: break;
1.37 nicm 273: case 'q':
1.63 nicm 274: quiet = 1;
1.37 nicm 275: break;
1.1 nicm 276: case 'S':
277: if (path != NULL)
278: xfree(path);
279: path = xstrdup(optarg);
280: break;
281: case 'u':
282: flags |= IDENTIFY_UTF8;
283: break;
284: case 'v':
285: debug_level++;
286: break;
1.53 deraadt 287: default:
1.1 nicm 288: usage();
1.53 deraadt 289: }
290: }
1.1 nicm 291: argc -= optind;
292: argv += optind;
293:
1.92 nicm 294: if (shell_cmd != NULL && argc != 0)
1.46 nicm 295: usage();
296:
1.1 nicm 297: log_open_tty(debug_level);
298:
1.15 nicm 299: if (!(flags & IDENTIFY_UTF8)) {
300: /*
301: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
302: * exist (in that order) to contain UTF-8, it is a safe
303: * assumption that either they are using a UTF-8 terminal, or
304: * if not they know that output from UTF-8-capable programs may
305: * be wrong.
306: */
1.106 nicm 307: if ((s = getenv("LC_ALL")) == NULL || *s == '\0') {
308: if ((s = getenv("LC_CTYPE")) == NULL || *s == '\0')
1.15 nicm 309: s = getenv("LANG");
310: }
1.26 nicm 311: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
312: strcasestr(s, "UTF8") != NULL))
1.15 nicm 313: flags |= IDENTIFY_UTF8;
314: }
315:
1.42 nicm 316: environ_init(&global_environ);
1.62 nicm 317: for (var = environ; *var != NULL; var++)
1.42 nicm 318: environ_put(&global_environ, *var);
1.63 nicm 319:
320: options_init(&global_options, NULL);
1.99 nicm 321: options_table_populate_tree(server_options_table, &global_options);
322: options_set_number(&global_options, "quiet", quiet);
1.42 nicm 323:
1.12 nicm 324: options_init(&global_s_options, NULL);
1.99 nicm 325: options_table_populate_tree(session_options_table, &global_s_options);
326: options_set_string(&global_s_options, "default-shell", "%s", getshell());
1.44 nicm 327:
1.99 nicm 328: options_init(&global_w_options, NULL);
329: options_table_populate_tree(window_options_table, &global_w_options);
1.42 nicm 330:
1.99 nicm 331: /* Enable UTF-8 if the first client is on UTF-8 terminal. */
1.62 nicm 332: if (flags & IDENTIFY_UTF8) {
1.99 nicm 333: options_set_number(&global_s_options, "status-utf8", 1);
1.100 nicm 334: options_set_number(&global_s_options, "mouse-utf8", 1);
1.99 nicm 335: options_set_number(&global_w_options, "utf8", 1);
1.42 nicm 336: }
1.94 nicm 337:
1.99 nicm 338: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 339: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
340: if (strrchr(s, '/') != NULL)
341: s = strrchr(s, '/') + 1;
342: if (strstr(s, "vi") != NULL)
343: keys = MODEKEY_VI;
1.99 nicm 344: else
345: keys = MODEKEY_EMACS;
346: options_set_number(&global_s_options, "status-keys", keys);
347: options_set_number(&global_w_options, "mode-keys", keys);
1.94 nicm 348: }
1.1 nicm 349:
1.92 nicm 350: /* Locate the configuration file. */
1.1 nicm 351: if (cfg_file == NULL) {
352: home = getenv("HOME");
353: if (home == NULL || *home == '\0') {
354: pw = getpwuid(getuid());
355: if (pw != NULL)
356: home = pw->pw_dir;
357: }
358: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
1.69 nicm 359: if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
1.1 nicm 360: xfree(cfg_file);
361: cfg_file = NULL;
362: }
363: }
1.62 nicm 364:
1.68 nicm 365: /*
1.92 nicm 366: * Figure out the socket path. If specified on the command-line with -S
367: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 368: */
1.92 nicm 369: parseenvironment();
1.68 nicm 370: if (path == NULL) {
1.92 nicm 371: /* If no -L, use the environment. */
1.68 nicm 372: if (label == NULL) {
1.92 nicm 373: if (environ_path != NULL)
374: path = xstrdup(environ_path);
375: else
1.68 nicm 376: label = xstrdup("default");
377: }
378:
379: /* -L or default set. */
380: if (label != NULL) {
1.92 nicm 381: if ((path = makesocketpath(label)) == NULL) {
1.68 nicm 382: log_warn("can't create socket");
383: exit(1);
384: }
385: }
1.1 nicm 386: }
1.68 nicm 387: if (label != NULL)
388: xfree(label);
1.92 nicm 389: if (realpath(path, socket_path) == NULL)
390: strlcpy(socket_path, path, sizeof socket_path);
391: xfree(path);
1.1 nicm 392:
1.92 nicm 393: /* Set process title. */
394: setproctitle("%s (%s)", __progname, socket_path);
1.1 nicm 395:
1.92 nicm 396: /* Pass control to the client. */
1.78 nicm 397: ev_base = event_init();
1.92 nicm 398: exit(client_main(argc, argv, flags));
1.1 nicm 399: }