Annotation of src/usr.bin/tmux/tmux.c, Revision 1.139
1.139 ! nicm 1: /* $OpenBSD: tmux.c,v 1.138 2015/08/30 15:43:40 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:
1.92 nicm 44: char *cfg_file;
45: char *shell_cmd;
1.1 nicm 46: int debug_level;
47: time_t start_time;
1.132 nicm 48: char socket_path[PATH_MAX];
1.41 nicm 49: int login_shell;
1.92 nicm 50: char *environ_path;
1.70 nicm 51:
1.1 nicm 52: __dead void usage(void);
1.92 nicm 53: char *makesocketpath(const char *);
1.55 nicm 54:
1.1 nicm 55: __dead void
56: usage(void)
57: {
1.4 sobrado 58: fprintf(stderr,
1.136 jmc 59: "usage: %s [-2Cluv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 60: " [-S socket-path] [command [flags]]\n",
1.1 nicm 61: __progname);
62: exit(1);
63: }
64:
65: void
66: logfile(const char *name)
67: {
68: char *path;
69:
70: if (debug_level > 0) {
1.32 nicm 71: xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
1.130 nicm 72: log_open(path);
1.112 nicm 73: free(path);
1.1 nicm 74: }
75: }
76:
1.39 nicm 77: const char *
78: getshell(void)
79: {
80: struct passwd *pw;
81: const char *shell;
82:
83: shell = getenv("SHELL");
84: if (checkshell(shell))
85: return (shell);
86:
87: pw = getpwuid(getuid());
88: if (pw != NULL && checkshell(pw->pw_shell))
89: return (pw->pw_shell);
90:
91: return (_PATH_BSHELL);
92: }
93:
94: int
95: checkshell(const char *shell)
96: {
1.105 nicm 97: if (shell == NULL || *shell == '\0' || *shell != '/')
98: return (0);
99: if (areshell(shell))
1.39 nicm 100: return (0);
101: if (access(shell, X_OK) != 0)
102: return (0);
103: return (1);
104: }
105:
106: int
107: areshell(const char *shell)
108: {
109: const char *progname, *ptr;
110:
111: if ((ptr = strrchr(shell, '/')) != NULL)
112: ptr++;
113: else
114: ptr = shell;
115: progname = __progname;
116: if (*progname == '-')
117: progname++;
118: if (strcmp(ptr, progname) == 0)
119: return (1);
120: return (0);
1.107 nicm 121: }
122:
1.1 nicm 123: char *
1.92 nicm 124: makesocketpath(const char *label)
1.1 nicm 125: {
1.132 nicm 126: char base[PATH_MAX], realbase[PATH_MAX], *path, *s;
1.1 nicm 127: struct stat sb;
128: u_int uid;
129:
130: uid = getuid();
1.118 nicm 131: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
1.135 nicm 132: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
1.118 nicm 133: else if ((s = getenv("TMPDIR")) != NULL && *s != '\0')
134: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
135: else
1.102 nicm 136: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 137:
138: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
139: return (NULL);
140:
141: if (lstat(base, &sb) != 0)
142: return (NULL);
143: if (!S_ISDIR(sb.st_mode)) {
144: errno = ENOTDIR;
145: return (NULL);
146: }
1.134 nicm 147: if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
1.1 nicm 148: errno = EACCES;
149: return (NULL);
150: }
151:
1.113 nicm 152: if (realpath(base, realbase) == NULL)
153: strlcpy(realbase, base, sizeof realbase);
154:
155: xasprintf(&path, "%s/%s", realbase, label);
1.1 nicm 156: return (path);
157: }
158:
1.101 nicm 159: void
160: setblocking(int fd, int state)
161: {
162: int mode;
163:
164: if ((mode = fcntl(fd, F_GETFL)) != -1) {
165: if (!state)
166: mode |= O_NONBLOCK;
167: else
168: mode &= ~O_NONBLOCK;
169: fcntl(fd, F_SETFL, mode);
170: }
171: }
172:
1.55 nicm 173: __dead void
174: shell_exec(const char *shell, const char *shellcmd)
175: {
176: const char *shellname, *ptr;
177: char *argv0;
178:
179: ptr = strrchr(shell, '/');
180: if (ptr != NULL && *(ptr + 1) != '\0')
181: shellname = ptr + 1;
182: else
183: shellname = shell;
184: if (login_shell)
185: xasprintf(&argv0, "-%s", shellname);
186: else
187: xasprintf(&argv0, "%s", shellname);
188: setenv("SHELL", shell, 1);
1.90 nicm 189:
1.101 nicm 190: setblocking(STDIN_FILENO, 1);
191: setblocking(STDOUT_FILENO, 1);
192: setblocking(STDERR_FILENO, 1);
1.90 nicm 193: closefrom(STDERR_FILENO + 1);
1.55 nicm 194:
195: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
196: fatal("execl failed");
197: }
198:
1.138 nicm 199: const char *
1.137 nicm 200: find_home(void)
201: {
202: struct passwd *pw;
203: const char *home;
204:
205: home = getenv("HOME");
206: if (home == NULL || *home == '\0') {
207: pw = getpwuid(getuid());
208: if (pw != NULL)
209: home = pw->pw_dir;
210: else
211: home = NULL;
212: }
213:
1.138 nicm 214: return (home);
1.137 nicm 215: }
216:
1.1 nicm 217: int
218: main(int argc, char **argv)
219: {
1.132 nicm 220: char *s, *path, *label, **var, tmp[PATH_MAX];
1.126 nicm 221: char in[256];
1.128 nicm 222: const char *home;
1.126 nicm 223: long long pid;
1.131 nicm 224: int opt, flags, keys, session;
1.54 nicm 225:
226: #ifdef DEBUG
227: malloc_options = (char *) "AFGJPX";
228: #endif
1.119 nicm 229:
230: setlocale(LC_TIME, "");
1.1 nicm 231:
1.131 nicm 232: flags = 0;
1.92 nicm 233: label = path = NULL;
1.41 nicm 234: login_shell = (**argv == '-');
1.117 nicm 235: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 236: switch (opt) {
1.1 nicm 237: case '2':
1.124 nicm 238: flags |= CLIENT_256COLOURS;
1.1 nicm 239: break;
1.46 nicm 240: case 'c':
1.112 nicm 241: free(shell_cmd);
1.92 nicm 242: shell_cmd = xstrdup(optarg);
1.111 nicm 243: break;
244: case 'C':
1.124 nicm 245: if (flags & CLIENT_CONTROL)
246: flags |= CLIENT_CONTROLCONTROL;
1.111 nicm 247: else
1.124 nicm 248: flags |= CLIENT_CONTROL;
1.37 nicm 249: break;
1.1 nicm 250: case 'f':
1.112 nicm 251: free(cfg_file);
1.1 nicm 252: cfg_file = xstrdup(optarg);
1.41 nicm 253: break;
254: case 'l':
255: login_shell = 1;
1.1 nicm 256: break;
257: case 'L':
1.112 nicm 258: free(label);
1.1 nicm 259: label = xstrdup(optarg);
260: break;
1.37 nicm 261: case 'q':
262: break;
1.1 nicm 263: case 'S':
1.112 nicm 264: free(path);
1.1 nicm 265: path = xstrdup(optarg);
266: break;
267: case 'u':
1.124 nicm 268: flags |= CLIENT_UTF8;
1.1 nicm 269: break;
270: case 'v':
271: debug_level++;
272: break;
1.53 deraadt 273: default:
1.1 nicm 274: usage();
1.53 deraadt 275: }
276: }
1.1 nicm 277: argc -= optind;
278: argv += optind;
279:
1.92 nicm 280: if (shell_cmd != NULL && argc != 0)
1.46 nicm 281: usage();
282:
1.124 nicm 283: if (!(flags & CLIENT_UTF8)) {
1.15 nicm 284: /*
285: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
286: * exist (in that order) to contain UTF-8, it is a safe
287: * assumption that either they are using a UTF-8 terminal, or
288: * if not they know that output from UTF-8-capable programs may
289: * be wrong.
290: */
1.106 nicm 291: if ((s = getenv("LC_ALL")) == NULL || *s == '\0') {
292: if ((s = getenv("LC_CTYPE")) == NULL || *s == '\0')
1.15 nicm 293: s = getenv("LANG");
294: }
1.26 nicm 295: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
296: strcasestr(s, "UTF8") != NULL))
1.124 nicm 297: flags |= CLIENT_UTF8;
1.15 nicm 298: }
299:
1.42 nicm 300: environ_init(&global_environ);
1.62 nicm 301: for (var = environ; *var != NULL; var++)
1.42 nicm 302: environ_put(&global_environ, *var);
1.125 nicm 303: if (getcwd(tmp, sizeof tmp) != NULL)
304: environ_set(&global_environ, "PWD", tmp);
1.63 nicm 305:
306: options_init(&global_options, NULL);
1.99 nicm 307: options_table_populate_tree(server_options_table, &global_options);
1.42 nicm 308:
1.12 nicm 309: options_init(&global_s_options, NULL);
1.99 nicm 310: options_table_populate_tree(session_options_table, &global_s_options);
1.131 nicm 311: options_set_string(&global_s_options, "default-shell", "%s",
312: getshell());
1.44 nicm 313:
1.99 nicm 314: options_init(&global_w_options, NULL);
315: options_table_populate_tree(window_options_table, &global_w_options);
1.42 nicm 316:
1.99 nicm 317: /* Enable UTF-8 if the first client is on UTF-8 terminal. */
1.124 nicm 318: if (flags & CLIENT_UTF8) {
1.99 nicm 319: options_set_number(&global_s_options, "status-utf8", 1);
1.100 nicm 320: options_set_number(&global_s_options, "mouse-utf8", 1);
1.99 nicm 321: options_set_number(&global_w_options, "utf8", 1);
1.42 nicm 322: }
1.94 nicm 323:
1.99 nicm 324: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 325: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
326: if (strrchr(s, '/') != NULL)
327: s = strrchr(s, '/') + 1;
328: if (strstr(s, "vi") != NULL)
329: keys = MODEKEY_VI;
1.99 nicm 330: else
331: keys = MODEKEY_EMACS;
332: options_set_number(&global_s_options, "status-keys", keys);
333: options_set_number(&global_w_options, "mode-keys", keys);
1.94 nicm 334: }
1.1 nicm 335:
1.92 nicm 336: /* Locate the configuration file. */
1.1 nicm 337: if (cfg_file == NULL) {
1.137 nicm 338: home = find_home();
1.128 nicm 339: if (home != NULL) {
340: xasprintf(&cfg_file, "%s/.tmux.conf", home);
341: if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
342: free(cfg_file);
343: cfg_file = NULL;
344: }
1.1 nicm 345: }
346: }
1.62 nicm 347:
1.126 nicm 348: /* Get path from environment. */
349: s = getenv("TMUX");
350: if (s != NULL && sscanf(s, "%255[^,],%lld,%d", in, &pid, &session) == 3)
351: environ_path = xstrdup(in);
352:
1.68 nicm 353: /*
1.92 nicm 354: * Figure out the socket path. If specified on the command-line with -S
355: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 356: */
357: if (path == NULL) {
1.92 nicm 358: /* If no -L, use the environment. */
1.68 nicm 359: if (label == NULL) {
1.92 nicm 360: if (environ_path != NULL)
361: path = xstrdup(environ_path);
362: else
1.68 nicm 363: label = xstrdup("default");
364: }
365:
366: /* -L or default set. */
367: if (label != NULL) {
1.92 nicm 368: if ((path = makesocketpath(label)) == NULL) {
1.123 nicm 369: fprintf(stderr, "can't create socket: %s\n",
370: strerror(errno));
1.68 nicm 371: exit(1);
372: }
373: }
1.1 nicm 374: }
1.112 nicm 375: free(label);
1.127 nicm 376:
377: if (strlcpy(socket_path, path, sizeof socket_path) >= sizeof socket_path) {
378: fprintf(stderr, "socket path too long: %s\n", path);
379: exit(1);
380: }
1.112 nicm 381: free(path);
1.1 nicm 382:
1.92 nicm 383: /* Set process title. */
384: setproctitle("%s (%s)", __progname, socket_path);
1.1 nicm 385:
1.92 nicm 386: /* Pass control to the client. */
1.139 ! nicm 387: exit(client_main(event_init(), argc, argv, flags));
1.1 nicm 388: }