Annotation of src/usr.bin/tmux/tmux.c, Revision 1.103
1.103 ! nicm 1: /* $OpenBSD: tmux.c,v 1.102 2011/01/12 22:23:58 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: {
101: if (shell == NULL || *shell == '\0' || areshell(shell))
102: return (0);
103: if (access(shell, X_OK) != 0)
104: return (0);
105: return (1);
106: }
107:
108: int
109: areshell(const char *shell)
110: {
111: const char *progname, *ptr;
112:
113: if ((ptr = strrchr(shell, '/')) != NULL)
114: ptr++;
115: else
116: ptr = shell;
117: progname = __progname;
118: if (*progname == '-')
119: progname++;
120: if (strcmp(ptr, progname) == 0)
121: return (1);
122: return (0);
123: }
124:
1.50 nicm 125: void
1.92 nicm 126: parseenvironment(void)
1.50 nicm 127: {
1.103 ! nicm 128: char *env, path[256];
! 129: long pid;
! 130: int idx;
1.50 nicm 131:
132: if ((env = getenv("TMUX")) == NULL)
133: return;
134:
1.103 ! nicm 135: if (sscanf(env, "%255s,%ld,%d", path, &pid, &idx) != 3)
1.50 nicm 136: return;
1.103 ! nicm 137: environ_path = xstrdup(path);
! 138: environ_pid = pid;
! 139: environ_idx = idx;
1.50 nicm 140: }
141:
1.1 nicm 142: char *
1.92 nicm 143: makesocketpath(const char *label)
1.1 nicm 144: {
1.102 nicm 145: char base[MAXPATHLEN], *path, *s;
1.1 nicm 146: struct stat sb;
147: u_int uid;
148:
149: uid = getuid();
1.102 nicm 150: if ((s = getenv("TMPDIR")) == NULL || *s == '\0')
151: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
152: else
153: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
1.1 nicm 154:
155: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
156: return (NULL);
157:
158: if (lstat(base, &sb) != 0)
159: return (NULL);
160: if (!S_ISDIR(sb.st_mode)) {
161: errno = ENOTDIR;
162: return (NULL);
163: }
164: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
165: errno = EACCES;
166: return (NULL);
167: }
168:
169: xasprintf(&path, "%s/%s", base, label);
170: return (path);
171: }
172:
1.101 nicm 173: void
174: setblocking(int fd, int state)
175: {
176: int mode;
177:
178: if ((mode = fcntl(fd, F_GETFL)) != -1) {
179: if (!state)
180: mode |= O_NONBLOCK;
181: else
182: mode &= ~O_NONBLOCK;
183: fcntl(fd, F_SETFL, mode);
184: }
185: }
186:
1.55 nicm 187: __dead void
188: shell_exec(const char *shell, const char *shellcmd)
189: {
190: const char *shellname, *ptr;
191: char *argv0;
192:
193: ptr = strrchr(shell, '/');
194: if (ptr != NULL && *(ptr + 1) != '\0')
195: shellname = ptr + 1;
196: else
197: shellname = shell;
198: if (login_shell)
199: xasprintf(&argv0, "-%s", shellname);
200: else
201: xasprintf(&argv0, "%s", shellname);
202: setenv("SHELL", shell, 1);
1.90 nicm 203:
1.101 nicm 204: setblocking(STDIN_FILENO, 1);
205: setblocking(STDOUT_FILENO, 1);
206: setblocking(STDERR_FILENO, 1);
1.90 nicm 207: closefrom(STDERR_FILENO + 1);
1.55 nicm 208:
209: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
210: fatal("execl failed");
211: }
212:
1.1 nicm 213: int
214: main(int argc, char **argv)
215: {
1.92 nicm 216: struct passwd *pw;
217: struct keylist *keylist;
218: char *s, *path, *label, *home, **var;
1.94 nicm 219: int opt, flags, quiet, keys;
1.54 nicm 220:
221: #ifdef DEBUG
222: malloc_options = (char *) "AFGJPX";
223: #endif
1.1 nicm 224:
1.94 nicm 225: quiet = flags = 0;
1.92 nicm 226: label = path = NULL;
1.41 nicm 227: login_shell = (**argv == '-');
1.46 nicm 228: while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUv")) != -1) {
1.41 nicm 229: switch (opt) {
1.1 nicm 230: case '2':
231: flags |= IDENTIFY_256COLOURS;
232: flags &= ~IDENTIFY_88COLOURS;
233: break;
234: case '8':
235: flags |= IDENTIFY_88COLOURS;
236: flags &= ~IDENTIFY_256COLOURS;
237: break;
1.46 nicm 238: case 'c':
1.92 nicm 239: if (shell_cmd != NULL)
240: xfree(shell_cmd);
241: shell_cmd = xstrdup(optarg);
1.37 nicm 242: break;
1.1 nicm 243: case 'f':
1.42 nicm 244: if (cfg_file != NULL)
1.2 ray 245: xfree(cfg_file);
1.1 nicm 246: cfg_file = xstrdup(optarg);
1.41 nicm 247: break;
248: case 'l':
249: login_shell = 1;
1.1 nicm 250: break;
251: case 'L':
252: if (label != NULL)
253: xfree(label);
254: label = xstrdup(optarg);
255: break;
1.37 nicm 256: case 'q':
1.63 nicm 257: quiet = 1;
1.37 nicm 258: break;
1.1 nicm 259: case 'S':
260: if (path != NULL)
261: xfree(path);
262: path = xstrdup(optarg);
263: break;
264: case 'u':
265: flags |= IDENTIFY_UTF8;
266: break;
267: case 'v':
268: debug_level++;
269: break;
1.53 deraadt 270: default:
1.1 nicm 271: usage();
1.53 deraadt 272: }
273: }
1.1 nicm 274: argc -= optind;
275: argv += optind;
276:
1.92 nicm 277: if (shell_cmd != NULL && argc != 0)
1.46 nicm 278: usage();
279:
1.1 nicm 280: log_open_tty(debug_level);
281:
1.15 nicm 282: if (!(flags & IDENTIFY_UTF8)) {
283: /*
284: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
285: * exist (in that order) to contain UTF-8, it is a safe
286: * assumption that either they are using a UTF-8 terminal, or
287: * if not they know that output from UTF-8-capable programs may
288: * be wrong.
289: */
290: if ((s = getenv("LC_ALL")) == NULL) {
291: if ((s = getenv("LC_CTYPE")) == NULL)
292: s = getenv("LANG");
293: }
1.26 nicm 294: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
295: strcasestr(s, "UTF8") != NULL))
1.15 nicm 296: flags |= IDENTIFY_UTF8;
297: }
298:
1.42 nicm 299: environ_init(&global_environ);
1.62 nicm 300: for (var = environ; *var != NULL; var++)
1.42 nicm 301: environ_put(&global_environ, *var);
1.63 nicm 302:
303: options_init(&global_options, NULL);
1.99 nicm 304: options_table_populate_tree(server_options_table, &global_options);
305: options_set_number(&global_options, "quiet", quiet);
1.42 nicm 306:
1.12 nicm 307: options_init(&global_s_options, NULL);
1.99 nicm 308: options_table_populate_tree(session_options_table, &global_s_options);
309: options_set_string(&global_s_options, "default-shell", "%s", getshell());
1.44 nicm 310:
1.99 nicm 311: options_init(&global_w_options, NULL);
312: options_table_populate_tree(window_options_table, &global_w_options);
313:
314: /* Set the prefix option (its a list, so not in the table). */
1.44 nicm 315: keylist = xmalloc(sizeof *keylist);
316: ARRAY_INIT(keylist);
317: ARRAY_ADD(keylist, '\002');
1.99 nicm 318: options_set_data(&global_s_options, "prefix", keylist, xfree);
1.42 nicm 319:
1.99 nicm 320: /* Enable UTF-8 if the first client is on UTF-8 terminal. */
1.62 nicm 321: if (flags & IDENTIFY_UTF8) {
1.99 nicm 322: options_set_number(&global_s_options, "status-utf8", 1);
1.100 nicm 323: options_set_number(&global_s_options, "mouse-utf8", 1);
1.99 nicm 324: options_set_number(&global_w_options, "utf8", 1);
1.42 nicm 325: }
1.94 nicm 326:
1.99 nicm 327: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 328: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
329: if (strrchr(s, '/') != NULL)
330: s = strrchr(s, '/') + 1;
331: if (strstr(s, "vi") != NULL)
332: keys = MODEKEY_VI;
1.99 nicm 333: else
334: keys = MODEKEY_EMACS;
335: options_set_number(&global_s_options, "status-keys", keys);
336: options_set_number(&global_w_options, "mode-keys", keys);
1.94 nicm 337: }
1.1 nicm 338:
1.92 nicm 339: /* Locate the configuration file. */
1.1 nicm 340: if (cfg_file == NULL) {
341: home = getenv("HOME");
342: if (home == NULL || *home == '\0') {
343: pw = getpwuid(getuid());
344: if (pw != NULL)
345: home = pw->pw_dir;
346: }
347: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
1.69 nicm 348: if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
1.1 nicm 349: xfree(cfg_file);
350: cfg_file = NULL;
351: }
352: }
1.62 nicm 353:
1.68 nicm 354: /*
1.92 nicm 355: * Figure out the socket path. If specified on the command-line with -S
356: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 357: */
1.92 nicm 358: parseenvironment();
1.68 nicm 359: if (path == NULL) {
1.92 nicm 360: /* If no -L, use the environment. */
1.68 nicm 361: if (label == NULL) {
1.92 nicm 362: if (environ_path != NULL)
363: path = xstrdup(environ_path);
364: else
1.68 nicm 365: label = xstrdup("default");
366: }
367:
368: /* -L or default set. */
369: if (label != NULL) {
1.92 nicm 370: if ((path = makesocketpath(label)) == NULL) {
1.68 nicm 371: log_warn("can't create socket");
372: exit(1);
373: }
374: }
1.1 nicm 375: }
1.68 nicm 376: if (label != NULL)
377: xfree(label);
1.92 nicm 378: if (realpath(path, socket_path) == NULL)
379: strlcpy(socket_path, path, sizeof socket_path);
380: xfree(path);
1.1 nicm 381:
1.92 nicm 382: /* Set process title. */
383: setproctitle("%s (%s)", __progname, socket_path);
1.1 nicm 384:
1.92 nicm 385: /* Pass control to the client. */
1.78 nicm 386: ev_base = event_init();
1.92 nicm 387: exit(client_main(argc, argv, flags));
1.1 nicm 388: }
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