Annotation of src/usr.bin/tmux/tmux.c, Revision 1.116
1.116 ! nicm 1: /* $OpenBSD: tmux.c,v 1.115 2013/03/24 09:54:10 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;
1.116 ! nicm 52: int environ_session_id = -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: if (debug_level > 0) {
1.32 nicm 74: xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
1.109 nicm 75: log_open(debug_level, path);
1.112 nicm 76: free(path);
1.1 nicm 77: }
78: }
79:
1.39 nicm 80: const char *
81: getshell(void)
82: {
83: struct passwd *pw;
84: const char *shell;
85:
86: shell = getenv("SHELL");
87: if (checkshell(shell))
88: return (shell);
89:
90: pw = getpwuid(getuid());
91: if (pw != NULL && checkshell(pw->pw_shell))
92: return (pw->pw_shell);
93:
94: return (_PATH_BSHELL);
95: }
96:
97: int
98: checkshell(const char *shell)
99: {
1.105 nicm 100: if (shell == NULL || *shell == '\0' || *shell != '/')
101: return (0);
102: if (areshell(shell))
1.39 nicm 103: return (0);
104: if (access(shell, X_OK) != 0)
105: return (0);
106: return (1);
107: }
108:
109: int
110: areshell(const char *shell)
111: {
112: const char *progname, *ptr;
113:
114: if ((ptr = strrchr(shell, '/')) != NULL)
115: ptr++;
116: else
117: ptr = shell;
118: progname = __progname;
119: if (*progname == '-')
120: progname++;
121: if (strcmp(ptr, progname) == 0)
122: return (1);
123: return (0);
1.107 nicm 124: }
125:
126: const char*
127: get_full_path(const char *wd, const char *path)
128: {
129: static char newpath[MAXPATHLEN];
130: char oldpath[MAXPATHLEN];
131:
132: if (getcwd(oldpath, sizeof oldpath) == NULL)
133: return (NULL);
134: if (chdir(wd) != 0)
135: return (NULL);
136: if (realpath(path, newpath) != 0)
137: return (NULL);
138: chdir(oldpath);
139: return (newpath);
1.39 nicm 140: }
141:
1.50 nicm 142: void
1.92 nicm 143: parseenvironment(void)
1.50 nicm 144: {
1.103 nicm 145: char *env, path[256];
146: long pid;
1.116 ! nicm 147: int id;
1.50 nicm 148:
149: if ((env = getenv("TMUX")) == NULL)
150: return;
151:
1.116 ! nicm 152: if (sscanf(env, "%255[^,],%ld,%d", path, &pid, &id) != 3)
1.50 nicm 153: return;
1.103 nicm 154: environ_path = xstrdup(path);
155: environ_pid = pid;
1.116 ! nicm 156: environ_session_id = id;
1.50 nicm 157: }
158:
1.1 nicm 159: char *
1.92 nicm 160: makesocketpath(const char *label)
1.1 nicm 161: {
1.113 nicm 162: char base[MAXPATHLEN], realbase[MAXPATHLEN], *path, *s;
1.1 nicm 163: struct stat sb;
164: u_int uid;
165:
166: uid = getuid();
1.102 nicm 167: if ((s = getenv("TMPDIR")) == NULL || *s == '\0')
168: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
169: else
170: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
1.1 nicm 171:
172: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
173: return (NULL);
174:
175: if (lstat(base, &sb) != 0)
176: return (NULL);
177: if (!S_ISDIR(sb.st_mode)) {
178: errno = ENOTDIR;
179: return (NULL);
180: }
181: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
182: errno = EACCES;
183: return (NULL);
184: }
185:
1.113 nicm 186: if (realpath(base, realbase) == NULL)
187: strlcpy(realbase, base, sizeof realbase);
188:
189: xasprintf(&path, "%s/%s", realbase, label);
1.1 nicm 190: return (path);
191: }
192:
1.101 nicm 193: void
194: setblocking(int fd, int state)
195: {
196: int mode;
197:
198: if ((mode = fcntl(fd, F_GETFL)) != -1) {
199: if (!state)
200: mode |= O_NONBLOCK;
201: else
202: mode &= ~O_NONBLOCK;
203: fcntl(fd, F_SETFL, mode);
204: }
205: }
206:
1.55 nicm 207: __dead void
208: shell_exec(const char *shell, const char *shellcmd)
209: {
210: const char *shellname, *ptr;
211: char *argv0;
212:
213: ptr = strrchr(shell, '/');
214: if (ptr != NULL && *(ptr + 1) != '\0')
215: shellname = ptr + 1;
216: else
217: shellname = shell;
218: if (login_shell)
219: xasprintf(&argv0, "-%s", shellname);
220: else
221: xasprintf(&argv0, "%s", shellname);
222: setenv("SHELL", shell, 1);
1.90 nicm 223:
1.101 nicm 224: setblocking(STDIN_FILENO, 1);
225: setblocking(STDOUT_FILENO, 1);
226: setblocking(STDERR_FILENO, 1);
1.90 nicm 227: closefrom(STDERR_FILENO + 1);
1.55 nicm 228:
229: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
230: fatal("execl failed");
231: }
232:
1.1 nicm 233: int
234: main(int argc, char **argv)
235: {
1.92 nicm 236: struct passwd *pw;
237: char *s, *path, *label, *home, **var;
1.94 nicm 238: int opt, flags, quiet, keys;
1.54 nicm 239:
240: #ifdef DEBUG
241: malloc_options = (char *) "AFGJPX";
242: #endif
1.1 nicm 243:
1.94 nicm 244: quiet = flags = 0;
1.92 nicm 245: label = path = NULL;
1.41 nicm 246: login_shell = (**argv == '-');
1.111 nicm 247: while ((opt = getopt(argc, argv, "28c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 248: switch (opt) {
1.1 nicm 249: case '2':
250: flags |= IDENTIFY_256COLOURS;
251: flags &= ~IDENTIFY_88COLOURS;
252: break;
253: case '8':
254: flags |= IDENTIFY_88COLOURS;
255: flags &= ~IDENTIFY_256COLOURS;
256: break;
1.46 nicm 257: case 'c':
1.112 nicm 258: free(shell_cmd);
1.92 nicm 259: shell_cmd = xstrdup(optarg);
1.111 nicm 260: break;
261: case 'C':
262: if (flags & IDENTIFY_CONTROL)
263: flags |= IDENTIFY_TERMIOS;
264: else
265: flags |= IDENTIFY_CONTROL;
1.37 nicm 266: break;
1.1 nicm 267: case 'f':
1.112 nicm 268: free(cfg_file);
1.1 nicm 269: cfg_file = xstrdup(optarg);
1.41 nicm 270: break;
271: case 'l':
272: login_shell = 1;
1.1 nicm 273: break;
274: case 'L':
1.112 nicm 275: free(label);
1.1 nicm 276: label = xstrdup(optarg);
277: break;
1.37 nicm 278: case 'q':
1.63 nicm 279: quiet = 1;
1.37 nicm 280: break;
1.1 nicm 281: case 'S':
1.112 nicm 282: free(path);
1.1 nicm 283: path = xstrdup(optarg);
284: break;
285: case 'u':
286: flags |= IDENTIFY_UTF8;
287: break;
288: case 'v':
289: debug_level++;
290: break;
1.53 deraadt 291: default:
1.1 nicm 292: usage();
1.53 deraadt 293: }
294: }
1.1 nicm 295: argc -= optind;
296: argv += optind;
297:
1.92 nicm 298: if (shell_cmd != NULL && argc != 0)
1.46 nicm 299: usage();
300:
1.15 nicm 301: if (!(flags & IDENTIFY_UTF8)) {
302: /*
303: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
304: * exist (in that order) to contain UTF-8, it is a safe
305: * assumption that either they are using a UTF-8 terminal, or
306: * if not they know that output from UTF-8-capable programs may
307: * be wrong.
308: */
1.106 nicm 309: if ((s = getenv("LC_ALL")) == NULL || *s == '\0') {
310: if ((s = getenv("LC_CTYPE")) == NULL || *s == '\0')
1.15 nicm 311: s = getenv("LANG");
312: }
1.26 nicm 313: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
314: strcasestr(s, "UTF8") != NULL))
1.15 nicm 315: flags |= IDENTIFY_UTF8;
316: }
317:
1.42 nicm 318: environ_init(&global_environ);
1.62 nicm 319: for (var = environ; *var != NULL; var++)
1.42 nicm 320: environ_put(&global_environ, *var);
1.63 nicm 321:
322: options_init(&global_options, NULL);
1.99 nicm 323: options_table_populate_tree(server_options_table, &global_options);
324: options_set_number(&global_options, "quiet", quiet);
1.42 nicm 325:
1.12 nicm 326: options_init(&global_s_options, NULL);
1.99 nicm 327: options_table_populate_tree(session_options_table, &global_s_options);
328: options_set_string(&global_s_options, "default-shell", "%s", getshell());
1.44 nicm 329:
1.99 nicm 330: options_init(&global_w_options, NULL);
331: options_table_populate_tree(window_options_table, &global_w_options);
1.42 nicm 332:
1.99 nicm 333: /* Enable UTF-8 if the first client is on UTF-8 terminal. */
1.62 nicm 334: if (flags & IDENTIFY_UTF8) {
1.99 nicm 335: options_set_number(&global_s_options, "status-utf8", 1);
1.100 nicm 336: options_set_number(&global_s_options, "mouse-utf8", 1);
1.99 nicm 337: options_set_number(&global_w_options, "utf8", 1);
1.42 nicm 338: }
1.94 nicm 339:
1.99 nicm 340: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 341: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
342: if (strrchr(s, '/') != NULL)
343: s = strrchr(s, '/') + 1;
344: if (strstr(s, "vi") != NULL)
345: keys = MODEKEY_VI;
1.99 nicm 346: else
347: keys = MODEKEY_EMACS;
348: options_set_number(&global_s_options, "status-keys", keys);
349: options_set_number(&global_w_options, "mode-keys", keys);
1.94 nicm 350: }
1.1 nicm 351:
1.92 nicm 352: /* Locate the configuration file. */
1.1 nicm 353: if (cfg_file == NULL) {
354: home = getenv("HOME");
355: if (home == NULL || *home == '\0') {
356: pw = getpwuid(getuid());
357: if (pw != NULL)
358: home = pw->pw_dir;
359: }
360: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
1.69 nicm 361: if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
1.112 nicm 362: free(cfg_file);
1.1 nicm 363: cfg_file = NULL;
364: }
365: }
1.62 nicm 366:
1.68 nicm 367: /*
1.92 nicm 368: * Figure out the socket path. If specified on the command-line with -S
369: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 370: */
1.92 nicm 371: parseenvironment();
1.68 nicm 372: if (path == NULL) {
1.92 nicm 373: /* If no -L, use the environment. */
1.68 nicm 374: if (label == NULL) {
1.92 nicm 375: if (environ_path != NULL)
376: path = xstrdup(environ_path);
377: else
1.68 nicm 378: label = xstrdup("default");
379: }
380:
381: /* -L or default set. */
382: if (label != NULL) {
1.92 nicm 383: if ((path = makesocketpath(label)) == NULL) {
1.109 nicm 384: fprintf(stderr, "can't create socket\n");
1.68 nicm 385: exit(1);
386: }
387: }
1.1 nicm 388: }
1.112 nicm 389: free(label);
1.113 nicm 390: strlcpy(socket_path, path, sizeof socket_path);
1.112 nicm 391: free(path);
1.1 nicm 392:
1.92 nicm 393: /* Set process title. */
394: setproctitle("%s (%s)", __progname, socket_path);
1.1 nicm 395:
1.92 nicm 396: /* Pass control to the client. */
1.78 nicm 397: ev_base = event_init();
1.92 nicm 398: exit(client_main(argc, argv, flags));
1.1 nicm 399: }
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