Annotation of src/usr.bin/tmux/tmux.c, Revision 1.133
1.133 ! nicm 1: /* $OpenBSD: tmux.c,v 1.132 2014/10/20 23:27:14 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>
1.132 nicm 25: #include <getopt.h>
1.119 nicm 26: #include <locale.h>
1.1 nicm 27: #include <paths.h>
28: #include <pwd.h>
29: #include <stdlib.h>
30: #include <string.h>
31: #include <unistd.h>
32:
33: #include "tmux.h"
34:
35: #ifdef DEBUG
1.54 nicm 36: extern char *malloc_options;
1.1 nicm 37: #endif
38:
1.63 nicm 39: struct options global_options; /* server options */
1.12 nicm 40: struct options global_s_options; /* session options */
41: struct options global_w_options; /* window options */
1.29 nicm 42: struct environ global_environ;
1.1 nicm 43:
1.78 nicm 44: struct event_base *ev_base;
45:
1.92 nicm 46: char *cfg_file;
47: char *shell_cmd;
1.1 nicm 48: int debug_level;
49: time_t start_time;
1.132 nicm 50: char socket_path[PATH_MAX];
1.41 nicm 51: int login_shell;
1.92 nicm 52: char *environ_path;
1.70 nicm 53:
1.1 nicm 54: __dead void usage(void);
1.92 nicm 55: char *makesocketpath(const char *);
1.55 nicm 56:
1.1 nicm 57: __dead void
58: usage(void)
59: {
1.4 sobrado 60: fprintf(stderr,
1.129 nicm 61: "usage: %s [-2lquv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 62: " [-S socket-path] [command [flags]]\n",
1.1 nicm 63: __progname);
64: exit(1);
65: }
66:
67: void
68: logfile(const char *name)
69: {
70: char *path;
71:
72: if (debug_level > 0) {
1.32 nicm 73: xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
1.130 nicm 74: log_open(path);
1.112 nicm 75: free(path);
1.1 nicm 76: }
77: }
78:
1.39 nicm 79: const char *
80: getshell(void)
81: {
82: struct passwd *pw;
83: const char *shell;
84:
85: shell = getenv("SHELL");
86: if (checkshell(shell))
87: return (shell);
88:
89: pw = getpwuid(getuid());
90: if (pw != NULL && checkshell(pw->pw_shell))
91: return (pw->pw_shell);
92:
93: return (_PATH_BSHELL);
94: }
95:
96: int
97: checkshell(const char *shell)
98: {
1.105 nicm 99: if (shell == NULL || *shell == '\0' || *shell != '/')
100: return (0);
101: if (areshell(shell))
1.39 nicm 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);
1.107 nicm 123: }
124:
1.1 nicm 125: char *
1.92 nicm 126: makesocketpath(const char *label)
1.1 nicm 127: {
1.132 nicm 128: char base[PATH_MAX], realbase[PATH_MAX], *path, *s;
1.1 nicm 129: struct stat sb;
130: u_int uid;
131:
132: uid = getuid();
1.118 nicm 133: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
134: xsnprintf(base, sizeof base, "%s/", s);
135: else if ((s = getenv("TMPDIR")) != NULL && *s != '\0')
136: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
137: else
1.102 nicm 138: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 139:
140: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
141: return (NULL);
142:
143: if (lstat(base, &sb) != 0)
144: return (NULL);
145: if (!S_ISDIR(sb.st_mode)) {
146: errno = ENOTDIR;
147: return (NULL);
148: }
1.133 ! nicm 149: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
1.1 nicm 150: errno = EACCES;
151: return (NULL);
152: }
153:
1.113 nicm 154: if (realpath(base, realbase) == NULL)
155: strlcpy(realbase, base, sizeof realbase);
156:
157: xasprintf(&path, "%s/%s", realbase, label);
1.1 nicm 158: return (path);
159: }
160:
1.101 nicm 161: void
162: setblocking(int fd, int state)
163: {
164: int mode;
165:
166: if ((mode = fcntl(fd, F_GETFL)) != -1) {
167: if (!state)
168: mode |= O_NONBLOCK;
169: else
170: mode &= ~O_NONBLOCK;
171: fcntl(fd, F_SETFL, mode);
172: }
173: }
174:
1.55 nicm 175: __dead void
176: shell_exec(const char *shell, const char *shellcmd)
177: {
178: const char *shellname, *ptr;
179: char *argv0;
180:
181: ptr = strrchr(shell, '/');
182: if (ptr != NULL && *(ptr + 1) != '\0')
183: shellname = ptr + 1;
184: else
185: shellname = shell;
186: if (login_shell)
187: xasprintf(&argv0, "-%s", shellname);
188: else
189: xasprintf(&argv0, "%s", shellname);
190: setenv("SHELL", shell, 1);
1.90 nicm 191:
1.101 nicm 192: setblocking(STDIN_FILENO, 1);
193: setblocking(STDOUT_FILENO, 1);
194: setblocking(STDERR_FILENO, 1);
1.90 nicm 195: closefrom(STDERR_FILENO + 1);
1.55 nicm 196:
197: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
198: fatal("execl failed");
199: }
200:
1.1 nicm 201: int
202: main(int argc, char **argv)
203: {
1.92 nicm 204: struct passwd *pw;
1.132 nicm 205: char *s, *path, *label, **var, tmp[PATH_MAX];
1.126 nicm 206: char in[256];
1.128 nicm 207: const char *home;
1.126 nicm 208: long long pid;
1.131 nicm 209: int opt, flags, keys, session;
1.54 nicm 210:
211: #ifdef DEBUG
212: malloc_options = (char *) "AFGJPX";
213: #endif
1.119 nicm 214:
215: setlocale(LC_TIME, "");
1.1 nicm 216:
1.131 nicm 217: flags = 0;
1.92 nicm 218: label = path = NULL;
1.41 nicm 219: login_shell = (**argv == '-');
1.117 nicm 220: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 221: switch (opt) {
1.1 nicm 222: case '2':
1.124 nicm 223: flags |= CLIENT_256COLOURS;
1.1 nicm 224: break;
1.46 nicm 225: case 'c':
1.112 nicm 226: free(shell_cmd);
1.92 nicm 227: shell_cmd = xstrdup(optarg);
1.111 nicm 228: break;
229: case 'C':
1.124 nicm 230: if (flags & CLIENT_CONTROL)
231: flags |= CLIENT_CONTROLCONTROL;
1.111 nicm 232: else
1.124 nicm 233: flags |= CLIENT_CONTROL;
1.37 nicm 234: break;
1.1 nicm 235: case 'f':
1.112 nicm 236: free(cfg_file);
1.1 nicm 237: cfg_file = xstrdup(optarg);
1.41 nicm 238: break;
239: case 'l':
240: login_shell = 1;
1.1 nicm 241: break;
242: case 'L':
1.112 nicm 243: free(label);
1.1 nicm 244: label = xstrdup(optarg);
245: break;
1.37 nicm 246: case 'q':
247: break;
1.1 nicm 248: case 'S':
1.112 nicm 249: free(path);
1.1 nicm 250: path = xstrdup(optarg);
251: break;
252: case 'u':
1.124 nicm 253: flags |= CLIENT_UTF8;
1.1 nicm 254: break;
255: case 'v':
256: debug_level++;
257: break;
1.53 deraadt 258: default:
1.1 nicm 259: usage();
1.53 deraadt 260: }
261: }
1.1 nicm 262: argc -= optind;
263: argv += optind;
264:
1.92 nicm 265: if (shell_cmd != NULL && argc != 0)
1.46 nicm 266: usage();
267:
1.124 nicm 268: if (!(flags & CLIENT_UTF8)) {
1.15 nicm 269: /*
270: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
271: * exist (in that order) to contain UTF-8, it is a safe
272: * assumption that either they are using a UTF-8 terminal, or
273: * if not they know that output from UTF-8-capable programs may
274: * be wrong.
275: */
1.106 nicm 276: if ((s = getenv("LC_ALL")) == NULL || *s == '\0') {
277: if ((s = getenv("LC_CTYPE")) == NULL || *s == '\0')
1.15 nicm 278: s = getenv("LANG");
279: }
1.26 nicm 280: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
281: strcasestr(s, "UTF8") != NULL))
1.124 nicm 282: flags |= CLIENT_UTF8;
1.15 nicm 283: }
284:
1.42 nicm 285: environ_init(&global_environ);
1.62 nicm 286: for (var = environ; *var != NULL; var++)
1.42 nicm 287: environ_put(&global_environ, *var);
1.125 nicm 288: if (getcwd(tmp, sizeof tmp) != NULL)
289: environ_set(&global_environ, "PWD", tmp);
1.63 nicm 290:
291: options_init(&global_options, NULL);
1.99 nicm 292: options_table_populate_tree(server_options_table, &global_options);
1.42 nicm 293:
1.12 nicm 294: options_init(&global_s_options, NULL);
1.99 nicm 295: options_table_populate_tree(session_options_table, &global_s_options);
1.131 nicm 296: options_set_string(&global_s_options, "default-shell", "%s",
297: getshell());
1.44 nicm 298:
1.99 nicm 299: options_init(&global_w_options, NULL);
300: options_table_populate_tree(window_options_table, &global_w_options);
1.42 nicm 301:
1.99 nicm 302: /* Enable UTF-8 if the first client is on UTF-8 terminal. */
1.124 nicm 303: if (flags & CLIENT_UTF8) {
1.99 nicm 304: options_set_number(&global_s_options, "status-utf8", 1);
1.100 nicm 305: options_set_number(&global_s_options, "mouse-utf8", 1);
1.99 nicm 306: options_set_number(&global_w_options, "utf8", 1);
1.42 nicm 307: }
1.94 nicm 308:
1.99 nicm 309: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 310: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
311: if (strrchr(s, '/') != NULL)
312: s = strrchr(s, '/') + 1;
313: if (strstr(s, "vi") != NULL)
314: keys = MODEKEY_VI;
1.99 nicm 315: else
316: keys = MODEKEY_EMACS;
317: options_set_number(&global_s_options, "status-keys", keys);
318: options_set_number(&global_w_options, "mode-keys", keys);
1.94 nicm 319: }
1.1 nicm 320:
1.92 nicm 321: /* Locate the configuration file. */
1.1 nicm 322: if (cfg_file == NULL) {
323: home = getenv("HOME");
324: if (home == NULL || *home == '\0') {
325: pw = getpwuid(getuid());
326: if (pw != NULL)
327: home = pw->pw_dir;
1.128 nicm 328: else
329: home = NULL;
1.1 nicm 330: }
1.128 nicm 331: if (home != NULL) {
332: xasprintf(&cfg_file, "%s/.tmux.conf", home);
333: if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
334: free(cfg_file);
335: cfg_file = NULL;
336: }
1.1 nicm 337: }
338: }
1.62 nicm 339:
1.126 nicm 340: /* Get path from environment. */
341: s = getenv("TMUX");
342: if (s != NULL && sscanf(s, "%255[^,],%lld,%d", in, &pid, &session) == 3)
343: environ_path = xstrdup(in);
344:
1.68 nicm 345: /*
1.92 nicm 346: * Figure out the socket path. If specified on the command-line with -S
347: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 348: */
349: if (path == NULL) {
1.92 nicm 350: /* If no -L, use the environment. */
1.68 nicm 351: if (label == NULL) {
1.92 nicm 352: if (environ_path != NULL)
353: path = xstrdup(environ_path);
354: else
1.68 nicm 355: label = xstrdup("default");
356: }
357:
358: /* -L or default set. */
359: if (label != NULL) {
1.92 nicm 360: if ((path = makesocketpath(label)) == NULL) {
1.123 nicm 361: fprintf(stderr, "can't create socket: %s\n",
362: strerror(errno));
1.68 nicm 363: exit(1);
364: }
365: }
1.1 nicm 366: }
1.112 nicm 367: free(label);
1.127 nicm 368:
369: if (strlcpy(socket_path, path, sizeof socket_path) >= sizeof socket_path) {
370: fprintf(stderr, "socket path too long: %s\n", path);
371: exit(1);
372: }
1.112 nicm 373: free(path);
1.1 nicm 374:
1.92 nicm 375: /* Set process title. */
376: setproctitle("%s (%s)", __progname, socket_path);
1.1 nicm 377:
1.92 nicm 378: /* Pass control to the client. */
1.78 nicm 379: ev_base = event_init();
1.92 nicm 380: exit(client_main(argc, argv, flags));
1.1 nicm 381: }
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