Annotation of src/usr.bin/tmux/tmux.c, Revision 1.122
1.122 ! nicm 1: /* $OpenBSD: tmux.c,v 1.121 2013/10/05 08:12:39 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>
1.119 nicm 25: #include <locale.h>
1.1 nicm 26: #include <paths.h>
27: #include <pwd.h>
28: #include <stdlib.h>
29: #include <string.h>
30: #include <unistd.h>
31:
32: #include "tmux.h"
33:
34: #ifdef DEBUG
1.54 nicm 35: extern char *malloc_options;
1.1 nicm 36: #endif
37:
1.63 nicm 38: struct options global_options; /* server options */
1.12 nicm 39: struct options global_s_options; /* session options */
40: struct options global_w_options; /* window options */
1.29 nicm 41: struct environ global_environ;
1.1 nicm 42:
1.78 nicm 43: struct event_base *ev_base;
44:
1.92 nicm 45: char *cfg_file;
46: char *shell_cmd;
1.1 nicm 47: int debug_level;
48: time_t start_time;
1.92 nicm 49: char socket_path[MAXPATHLEN];
1.41 nicm 50: int login_shell;
1.92 nicm 51: char *environ_path;
1.103 nicm 52: pid_t environ_pid = -1;
1.116 nicm 53: int environ_session_id = -1;
1.70 nicm 54:
1.1 nicm 55: __dead void usage(void);
1.92 nicm 56: void parseenvironment(void);
57: char *makesocketpath(const char *);
1.55 nicm 58:
1.1 nicm 59: __dead void
60: usage(void)
61: {
1.4 sobrado 62: fprintf(stderr,
1.52 nicm 63: "usage: %s [-28lquv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 64: " [-S socket-path] [command [flags]]\n",
1.1 nicm 65: __progname);
66: exit(1);
67: }
68:
69: void
70: logfile(const char *name)
71: {
72: char *path;
73:
74: if (debug_level > 0) {
1.32 nicm 75: xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
1.109 nicm 76: log_open(debug_level, path);
1.112 nicm 77: free(path);
1.1 nicm 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: {
1.122 ! nicm 130: int fd;
! 131: static char newpath[MAXPATHLEN];
! 132: const char *retval;
1.107 nicm 133:
1.121 nicm 134: fd = open(".", O_RDONLY);
135: if (fd == -1)
1.107 nicm 136: return (NULL);
1.121 nicm 137:
1.122 ! nicm 138: retval = NULL;
! 139: if (chdir(wd) == 0) {
! 140: if (realpath(path, newpath) == 0)
! 141: retval = newpath;
! 142: }
1.121 nicm 143:
144: if (fchdir(fd) != 0)
145: chdir("/");
146: close(fd);
147:
1.122 ! nicm 148: return (retval);
1.39 nicm 149: }
150:
1.50 nicm 151: void
1.92 nicm 152: parseenvironment(void)
1.50 nicm 153: {
1.103 nicm 154: char *env, path[256];
155: long pid;
1.116 nicm 156: int id;
1.50 nicm 157:
158: if ((env = getenv("TMUX")) == NULL)
159: return;
160:
1.116 nicm 161: if (sscanf(env, "%255[^,],%ld,%d", path, &pid, &id) != 3)
1.50 nicm 162: return;
1.103 nicm 163: environ_path = xstrdup(path);
164: environ_pid = pid;
1.116 nicm 165: environ_session_id = id;
1.50 nicm 166: }
167:
1.1 nicm 168: char *
1.92 nicm 169: makesocketpath(const char *label)
1.1 nicm 170: {
1.113 nicm 171: char base[MAXPATHLEN], realbase[MAXPATHLEN], *path, *s;
1.1 nicm 172: struct stat sb;
173: u_int uid;
174:
175: uid = getuid();
1.118 nicm 176: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
177: xsnprintf(base, sizeof base, "%s/", s);
178: else if ((s = getenv("TMPDIR")) != NULL && *s != '\0')
179: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
180: else
1.102 nicm 181: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 182:
183: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
184: return (NULL);
185:
186: if (lstat(base, &sb) != 0)
187: return (NULL);
188: if (!S_ISDIR(sb.st_mode)) {
189: errno = ENOTDIR;
190: return (NULL);
191: }
192: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
193: errno = EACCES;
194: return (NULL);
195: }
196:
1.113 nicm 197: if (realpath(base, realbase) == NULL)
198: strlcpy(realbase, base, sizeof realbase);
199:
200: xasprintf(&path, "%s/%s", realbase, label);
1.1 nicm 201: return (path);
202: }
203:
1.101 nicm 204: void
205: setblocking(int fd, int state)
206: {
207: int mode;
208:
209: if ((mode = fcntl(fd, F_GETFL)) != -1) {
210: if (!state)
211: mode |= O_NONBLOCK;
212: else
213: mode &= ~O_NONBLOCK;
214: fcntl(fd, F_SETFL, mode);
215: }
216: }
217:
1.55 nicm 218: __dead void
219: shell_exec(const char *shell, const char *shellcmd)
220: {
221: const char *shellname, *ptr;
222: char *argv0;
223:
224: ptr = strrchr(shell, '/');
225: if (ptr != NULL && *(ptr + 1) != '\0')
226: shellname = ptr + 1;
227: else
228: shellname = shell;
229: if (login_shell)
230: xasprintf(&argv0, "-%s", shellname);
231: else
232: xasprintf(&argv0, "%s", shellname);
233: setenv("SHELL", shell, 1);
1.90 nicm 234:
1.101 nicm 235: setblocking(STDIN_FILENO, 1);
236: setblocking(STDOUT_FILENO, 1);
237: setblocking(STDERR_FILENO, 1);
1.90 nicm 238: closefrom(STDERR_FILENO + 1);
1.55 nicm 239:
240: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
241: fatal("execl failed");
242: }
243:
1.1 nicm 244: int
245: main(int argc, char **argv)
246: {
1.92 nicm 247: struct passwd *pw;
248: char *s, *path, *label, *home, **var;
1.94 nicm 249: int opt, flags, quiet, keys;
1.54 nicm 250:
251: #ifdef DEBUG
252: malloc_options = (char *) "AFGJPX";
253: #endif
1.119 nicm 254:
255: setlocale(LC_TIME, "");
1.1 nicm 256:
1.94 nicm 257: quiet = flags = 0;
1.92 nicm 258: label = path = NULL;
1.41 nicm 259: login_shell = (**argv == '-');
1.117 nicm 260: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 261: switch (opt) {
1.1 nicm 262: case '2':
263: flags |= IDENTIFY_256COLOURS;
264: break;
1.46 nicm 265: case 'c':
1.112 nicm 266: free(shell_cmd);
1.92 nicm 267: shell_cmd = xstrdup(optarg);
1.111 nicm 268: break;
269: case 'C':
270: if (flags & IDENTIFY_CONTROL)
271: flags |= IDENTIFY_TERMIOS;
272: else
273: flags |= IDENTIFY_CONTROL;
1.37 nicm 274: break;
1.1 nicm 275: case 'f':
1.112 nicm 276: free(cfg_file);
1.1 nicm 277: cfg_file = xstrdup(optarg);
1.41 nicm 278: break;
279: case 'l':
280: login_shell = 1;
1.1 nicm 281: break;
282: case 'L':
1.112 nicm 283: free(label);
1.1 nicm 284: label = xstrdup(optarg);
285: break;
1.37 nicm 286: case 'q':
1.63 nicm 287: quiet = 1;
1.37 nicm 288: break;
1.1 nicm 289: case 'S':
1.112 nicm 290: free(path);
1.1 nicm 291: path = xstrdup(optarg);
292: break;
293: case 'u':
294: flags |= IDENTIFY_UTF8;
295: break;
296: case 'v':
297: debug_level++;
298: break;
1.53 deraadt 299: default:
1.1 nicm 300: usage();
1.53 deraadt 301: }
302: }
1.1 nicm 303: argc -= optind;
304: argv += optind;
305:
1.92 nicm 306: if (shell_cmd != NULL && argc != 0)
1.46 nicm 307: usage();
308:
1.15 nicm 309: if (!(flags & IDENTIFY_UTF8)) {
310: /*
311: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
312: * exist (in that order) to contain UTF-8, it is a safe
313: * assumption that either they are using a UTF-8 terminal, or
314: * if not they know that output from UTF-8-capable programs may
315: * be wrong.
316: */
1.106 nicm 317: if ((s = getenv("LC_ALL")) == NULL || *s == '\0') {
318: if ((s = getenv("LC_CTYPE")) == NULL || *s == '\0')
1.15 nicm 319: s = getenv("LANG");
320: }
1.26 nicm 321: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
322: strcasestr(s, "UTF8") != NULL))
1.15 nicm 323: flags |= IDENTIFY_UTF8;
324: }
325:
1.42 nicm 326: environ_init(&global_environ);
1.62 nicm 327: for (var = environ; *var != NULL; var++)
1.42 nicm 328: environ_put(&global_environ, *var);
1.63 nicm 329:
330: options_init(&global_options, NULL);
1.99 nicm 331: options_table_populate_tree(server_options_table, &global_options);
332: options_set_number(&global_options, "quiet", quiet);
1.42 nicm 333:
1.12 nicm 334: options_init(&global_s_options, NULL);
1.99 nicm 335: options_table_populate_tree(session_options_table, &global_s_options);
336: options_set_string(&global_s_options, "default-shell", "%s", getshell());
1.44 nicm 337:
1.99 nicm 338: options_init(&global_w_options, NULL);
339: options_table_populate_tree(window_options_table, &global_w_options);
1.42 nicm 340:
1.99 nicm 341: /* Enable UTF-8 if the first client is on UTF-8 terminal. */
1.62 nicm 342: if (flags & IDENTIFY_UTF8) {
1.99 nicm 343: options_set_number(&global_s_options, "status-utf8", 1);
1.100 nicm 344: options_set_number(&global_s_options, "mouse-utf8", 1);
1.99 nicm 345: options_set_number(&global_w_options, "utf8", 1);
1.42 nicm 346: }
1.94 nicm 347:
1.99 nicm 348: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 349: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
350: if (strrchr(s, '/') != NULL)
351: s = strrchr(s, '/') + 1;
352: if (strstr(s, "vi") != NULL)
353: keys = MODEKEY_VI;
1.99 nicm 354: else
355: keys = MODEKEY_EMACS;
356: options_set_number(&global_s_options, "status-keys", keys);
357: options_set_number(&global_w_options, "mode-keys", keys);
1.94 nicm 358: }
1.1 nicm 359:
1.92 nicm 360: /* Locate the configuration file. */
1.1 nicm 361: if (cfg_file == NULL) {
362: home = getenv("HOME");
363: if (home == NULL || *home == '\0') {
364: pw = getpwuid(getuid());
365: if (pw != NULL)
366: home = pw->pw_dir;
367: }
1.120 nicm 368: xasprintf(&cfg_file, "%s/.tmux.conf", home);
1.69 nicm 369: if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
1.112 nicm 370: free(cfg_file);
1.1 nicm 371: cfg_file = NULL;
372: }
373: }
1.62 nicm 374:
1.68 nicm 375: /*
1.92 nicm 376: * Figure out the socket path. If specified on the command-line with -S
377: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 378: */
1.92 nicm 379: parseenvironment();
1.68 nicm 380: if (path == NULL) {
1.92 nicm 381: /* If no -L, use the environment. */
1.68 nicm 382: if (label == NULL) {
1.92 nicm 383: if (environ_path != NULL)
384: path = xstrdup(environ_path);
385: else
1.68 nicm 386: label = xstrdup("default");
387: }
388:
389: /* -L or default set. */
390: if (label != NULL) {
1.92 nicm 391: if ((path = makesocketpath(label)) == NULL) {
1.109 nicm 392: fprintf(stderr, "can't create socket\n");
1.68 nicm 393: exit(1);
394: }
395: }
1.1 nicm 396: }
1.112 nicm 397: free(label);
1.113 nicm 398: strlcpy(socket_path, path, sizeof socket_path);
1.112 nicm 399: free(path);
1.1 nicm 400:
1.92 nicm 401: /* Set process title. */
402: setproctitle("%s (%s)", __progname, socket_path);
1.1 nicm 403:
1.92 nicm 404: /* Pass control to the client. */
1.78 nicm 405: ev_base = event_init();
1.92 nicm 406: exit(client_main(argc, argv, flags));
1.1 nicm 407: }
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