Annotation of src/usr.bin/tmux/tmux.c, Revision 1.101
1.101 ! nicm 1: /* $OpenBSD: tmux.c,v 1.100 2011/01/03 23:35:21 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;
51: pid_t environ_pid;
52: u_int environ_idx;
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: {
1.70 nicm 128: char *env, *path_pid, *pid_idx, buf[256];
1.50 nicm 129: size_t len;
130: const char *errstr;
131: long long ll;
132:
1.92 nicm 133: environ_pid = -1;
1.50 nicm 134: if ((env = getenv("TMUX")) == NULL)
135: return;
136:
1.70 nicm 137: if ((path_pid = strchr(env, ',')) == NULL || path_pid == env)
1.50 nicm 138: return;
1.70 nicm 139: if ((pid_idx = strchr(path_pid + 1, ',')) == NULL)
1.50 nicm 140: return;
1.70 nicm 141: if ((pid_idx == path_pid + 1 || pid_idx[1] == '\0'))
142: return;
143:
144: /* path */
145: len = path_pid - env;
1.92 nicm 146: environ_path = xmalloc(len + 1);
147: memcpy(environ_path, env, len);
148: environ_path[len] = '\0';
1.50 nicm 149:
1.70 nicm 150: /* pid */
151: len = pid_idx - path_pid - 1;
1.50 nicm 152: if (len > (sizeof buf) - 1)
153: return;
1.70 nicm 154: memcpy(buf, path_pid + 1, len);
1.50 nicm 155: buf[len] = '\0';
156:
157: ll = strtonum(buf, 0, LONG_MAX, &errstr);
158: if (errstr != NULL)
159: return;
1.92 nicm 160: environ_pid = ll;
1.50 nicm 161:
1.70 nicm 162: /* idx */
1.92 nicm 163: ll = strtonum(pid_idx + 1, 0, UINT_MAX, &errstr);
1.50 nicm 164: if (errstr != NULL)
165: return;
1.92 nicm 166: environ_idx = ll;
1.50 nicm 167: }
168:
1.1 nicm 169: char *
1.92 nicm 170: makesocketpath(const char *label)
1.1 nicm 171: {
172: char base[MAXPATHLEN], *path;
173: struct stat sb;
174: u_int uid;
175:
176: uid = getuid();
1.32 nicm 177: xsnprintf(base, MAXPATHLEN, "%s/tmux-%d", _PATH_TMP, uid);
1.1 nicm 178:
179: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
180: return (NULL);
181:
182: if (lstat(base, &sb) != 0)
183: return (NULL);
184: if (!S_ISDIR(sb.st_mode)) {
185: errno = ENOTDIR;
186: return (NULL);
187: }
188: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
189: errno = EACCES;
190: return (NULL);
191: }
192:
193: xasprintf(&path, "%s/%s", base, label);
194: return (path);
195: }
196:
1.101 ! nicm 197: void
! 198: setblocking(int fd, int state)
! 199: {
! 200: int mode;
! 201:
! 202: if ((mode = fcntl(fd, F_GETFL)) != -1) {
! 203: if (!state)
! 204: mode |= O_NONBLOCK;
! 205: else
! 206: mode &= ~O_NONBLOCK;
! 207: fcntl(fd, F_SETFL, mode);
! 208: }
! 209: }
! 210:
1.55 nicm 211: __dead void
212: shell_exec(const char *shell, const char *shellcmd)
213: {
214: const char *shellname, *ptr;
215: char *argv0;
216:
217: ptr = strrchr(shell, '/');
218: if (ptr != NULL && *(ptr + 1) != '\0')
219: shellname = ptr + 1;
220: else
221: shellname = shell;
222: if (login_shell)
223: xasprintf(&argv0, "-%s", shellname);
224: else
225: xasprintf(&argv0, "%s", shellname);
226: setenv("SHELL", shell, 1);
1.90 nicm 227:
1.101 ! nicm 228: setblocking(STDIN_FILENO, 1);
! 229: setblocking(STDOUT_FILENO, 1);
! 230: setblocking(STDERR_FILENO, 1);
1.90 nicm 231: closefrom(STDERR_FILENO + 1);
1.55 nicm 232:
233: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
234: fatal("execl failed");
235: }
236:
1.1 nicm 237: int
238: main(int argc, char **argv)
239: {
1.92 nicm 240: struct passwd *pw;
241: struct keylist *keylist;
242: char *s, *path, *label, *home, **var;
1.94 nicm 243: int opt, flags, quiet, keys;
1.54 nicm 244:
245: #ifdef DEBUG
246: malloc_options = (char *) "AFGJPX";
247: #endif
1.1 nicm 248:
1.94 nicm 249: quiet = flags = 0;
1.92 nicm 250: label = path = NULL;
1.41 nicm 251: login_shell = (**argv == '-');
1.46 nicm 252: while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUv")) != -1) {
1.41 nicm 253: switch (opt) {
1.1 nicm 254: case '2':
255: flags |= IDENTIFY_256COLOURS;
256: flags &= ~IDENTIFY_88COLOURS;
257: break;
258: case '8':
259: flags |= IDENTIFY_88COLOURS;
260: flags &= ~IDENTIFY_256COLOURS;
261: break;
1.46 nicm 262: case 'c':
1.92 nicm 263: if (shell_cmd != NULL)
264: xfree(shell_cmd);
265: shell_cmd = xstrdup(optarg);
1.37 nicm 266: break;
1.1 nicm 267: case 'f':
1.42 nicm 268: if (cfg_file != NULL)
1.2 ray 269: xfree(cfg_file);
1.1 nicm 270: cfg_file = xstrdup(optarg);
1.41 nicm 271: break;
272: case 'l':
273: login_shell = 1;
1.1 nicm 274: break;
275: case 'L':
276: if (label != NULL)
277: xfree(label);
278: label = xstrdup(optarg);
279: break;
1.37 nicm 280: case 'q':
1.63 nicm 281: quiet = 1;
1.37 nicm 282: break;
1.1 nicm 283: case 'S':
284: if (path != NULL)
285: xfree(path);
286: path = xstrdup(optarg);
287: break;
288: case 'u':
289: flags |= IDENTIFY_UTF8;
290: break;
291: case 'v':
292: debug_level++;
293: break;
1.53 deraadt 294: default:
1.1 nicm 295: usage();
1.53 deraadt 296: }
297: }
1.1 nicm 298: argc -= optind;
299: argv += optind;
300:
1.92 nicm 301: if (shell_cmd != NULL && argc != 0)
1.46 nicm 302: usage();
303:
1.1 nicm 304: log_open_tty(debug_level);
305:
1.15 nicm 306: if (!(flags & IDENTIFY_UTF8)) {
307: /*
308: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
309: * exist (in that order) to contain UTF-8, it is a safe
310: * assumption that either they are using a UTF-8 terminal, or
311: * if not they know that output from UTF-8-capable programs may
312: * be wrong.
313: */
314: if ((s = getenv("LC_ALL")) == NULL) {
315: if ((s = getenv("LC_CTYPE")) == NULL)
316: s = getenv("LANG");
317: }
1.26 nicm 318: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
319: strcasestr(s, "UTF8") != NULL))
1.15 nicm 320: flags |= IDENTIFY_UTF8;
321: }
322:
1.42 nicm 323: environ_init(&global_environ);
1.62 nicm 324: for (var = environ; *var != NULL; var++)
1.42 nicm 325: environ_put(&global_environ, *var);
1.63 nicm 326:
327: options_init(&global_options, NULL);
1.99 nicm 328: options_table_populate_tree(server_options_table, &global_options);
329: options_set_number(&global_options, "quiet", quiet);
1.42 nicm 330:
1.12 nicm 331: options_init(&global_s_options, NULL);
1.99 nicm 332: options_table_populate_tree(session_options_table, &global_s_options);
333: options_set_string(&global_s_options, "default-shell", "%s", getshell());
1.44 nicm 334:
1.99 nicm 335: options_init(&global_w_options, NULL);
336: options_table_populate_tree(window_options_table, &global_w_options);
337:
338: /* Set the prefix option (its a list, so not in the table). */
1.44 nicm 339: keylist = xmalloc(sizeof *keylist);
340: ARRAY_INIT(keylist);
341: ARRAY_ADD(keylist, '\002');
1.99 nicm 342: options_set_data(&global_s_options, "prefix", keylist, xfree);
1.42 nicm 343:
1.99 nicm 344: /* Enable UTF-8 if the first client is on UTF-8 terminal. */
1.62 nicm 345: if (flags & IDENTIFY_UTF8) {
1.99 nicm 346: options_set_number(&global_s_options, "status-utf8", 1);
1.100 nicm 347: options_set_number(&global_s_options, "mouse-utf8", 1);
1.99 nicm 348: options_set_number(&global_w_options, "utf8", 1);
1.42 nicm 349: }
1.94 nicm 350:
1.99 nicm 351: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 352: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
353: if (strrchr(s, '/') != NULL)
354: s = strrchr(s, '/') + 1;
355: if (strstr(s, "vi") != NULL)
356: keys = MODEKEY_VI;
1.99 nicm 357: else
358: keys = MODEKEY_EMACS;
359: options_set_number(&global_s_options, "status-keys", keys);
360: options_set_number(&global_w_options, "mode-keys", keys);
1.94 nicm 361: }
1.1 nicm 362:
1.92 nicm 363: /* Locate the configuration file. */
1.1 nicm 364: if (cfg_file == NULL) {
365: home = getenv("HOME");
366: if (home == NULL || *home == '\0') {
367: pw = getpwuid(getuid());
368: if (pw != NULL)
369: home = pw->pw_dir;
370: }
371: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
1.69 nicm 372: if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
1.1 nicm 373: xfree(cfg_file);
374: cfg_file = NULL;
375: }
376: }
1.62 nicm 377:
1.68 nicm 378: /*
1.92 nicm 379: * Figure out the socket path. If specified on the command-line with -S
380: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 381: */
1.92 nicm 382: parseenvironment();
1.68 nicm 383: if (path == NULL) {
1.92 nicm 384: /* If no -L, use the environment. */
1.68 nicm 385: if (label == NULL) {
1.92 nicm 386: if (environ_path != NULL)
387: path = xstrdup(environ_path);
388: else
1.68 nicm 389: label = xstrdup("default");
390: }
391:
392: /* -L or default set. */
393: if (label != NULL) {
1.92 nicm 394: if ((path = makesocketpath(label)) == NULL) {
1.68 nicm 395: log_warn("can't create socket");
396: exit(1);
397: }
398: }
1.1 nicm 399: }
1.68 nicm 400: if (label != NULL)
401: xfree(label);
1.92 nicm 402: if (realpath(path, socket_path) == NULL)
403: strlcpy(socket_path, path, sizeof socket_path);
404: xfree(path);
1.1 nicm 405:
1.92 nicm 406: /* Set process title. */
407: setproctitle("%s (%s)", __progname, socket_path);
1.1 nicm 408:
1.92 nicm 409: /* Pass control to the client. */
1.78 nicm 410: ev_base = event_init();
1.92 nicm 411: exit(client_main(argc, argv, flags));
1.1 nicm 412: }
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