Annotation of src/usr.bin/tmux/tmux.c, Revision 1.118
1.118 ! nicm 1: /* $OpenBSD: tmux.c,v 1.117 2013/03/27 11:17:12 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();
1.118 ! nicm 167: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
! 168: xsnprintf(base, sizeof base, "%s/", s);
! 169: else if ((s = getenv("TMPDIR")) != NULL && *s != '\0')
! 170: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
! 171: else
1.102 nicm 172: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 173:
174: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
175: return (NULL);
176:
177: if (lstat(base, &sb) != 0)
178: return (NULL);
179: if (!S_ISDIR(sb.st_mode)) {
180: errno = ENOTDIR;
181: return (NULL);
182: }
183: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
184: errno = EACCES;
185: return (NULL);
186: }
187:
1.113 nicm 188: if (realpath(base, realbase) == NULL)
189: strlcpy(realbase, base, sizeof realbase);
190:
191: xasprintf(&path, "%s/%s", realbase, label);
1.1 nicm 192: return (path);
193: }
194:
1.101 nicm 195: void
196: setblocking(int fd, int state)
197: {
198: int mode;
199:
200: if ((mode = fcntl(fd, F_GETFL)) != -1) {
201: if (!state)
202: mode |= O_NONBLOCK;
203: else
204: mode &= ~O_NONBLOCK;
205: fcntl(fd, F_SETFL, mode);
206: }
207: }
208:
1.55 nicm 209: __dead void
210: shell_exec(const char *shell, const char *shellcmd)
211: {
212: const char *shellname, *ptr;
213: char *argv0;
214:
215: ptr = strrchr(shell, '/');
216: if (ptr != NULL && *(ptr + 1) != '\0')
217: shellname = ptr + 1;
218: else
219: shellname = shell;
220: if (login_shell)
221: xasprintf(&argv0, "-%s", shellname);
222: else
223: xasprintf(&argv0, "%s", shellname);
224: setenv("SHELL", shell, 1);
1.90 nicm 225:
1.101 nicm 226: setblocking(STDIN_FILENO, 1);
227: setblocking(STDOUT_FILENO, 1);
228: setblocking(STDERR_FILENO, 1);
1.90 nicm 229: closefrom(STDERR_FILENO + 1);
1.55 nicm 230:
231: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
232: fatal("execl failed");
233: }
234:
1.1 nicm 235: int
236: main(int argc, char **argv)
237: {
1.92 nicm 238: struct passwd *pw;
239: char *s, *path, *label, *home, **var;
1.94 nicm 240: int opt, flags, quiet, keys;
1.54 nicm 241:
242: #ifdef DEBUG
243: malloc_options = (char *) "AFGJPX";
244: #endif
1.1 nicm 245:
1.94 nicm 246: quiet = flags = 0;
1.92 nicm 247: label = path = NULL;
1.41 nicm 248: login_shell = (**argv == '-');
1.117 nicm 249: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 250: switch (opt) {
1.1 nicm 251: case '2':
252: flags |= IDENTIFY_256COLOURS;
253: break;
1.46 nicm 254: case 'c':
1.112 nicm 255: free(shell_cmd);
1.92 nicm 256: shell_cmd = xstrdup(optarg);
1.111 nicm 257: break;
258: case 'C':
259: if (flags & IDENTIFY_CONTROL)
260: flags |= IDENTIFY_TERMIOS;
261: else
262: flags |= IDENTIFY_CONTROL;
1.37 nicm 263: break;
1.1 nicm 264: case 'f':
1.112 nicm 265: free(cfg_file);
1.1 nicm 266: cfg_file = xstrdup(optarg);
1.41 nicm 267: break;
268: case 'l':
269: login_shell = 1;
1.1 nicm 270: break;
271: case 'L':
1.112 nicm 272: free(label);
1.1 nicm 273: label = xstrdup(optarg);
274: break;
1.37 nicm 275: case 'q':
1.63 nicm 276: quiet = 1;
1.37 nicm 277: break;
1.1 nicm 278: case 'S':
1.112 nicm 279: free(path);
1.1 nicm 280: path = xstrdup(optarg);
281: break;
282: case 'u':
283: flags |= IDENTIFY_UTF8;
284: break;
285: case 'v':
286: debug_level++;
287: break;
1.53 deraadt 288: default:
1.1 nicm 289: usage();
1.53 deraadt 290: }
291: }
1.1 nicm 292: argc -= optind;
293: argv += optind;
294:
1.92 nicm 295: if (shell_cmd != NULL && argc != 0)
1.46 nicm 296: usage();
297:
1.15 nicm 298: if (!(flags & IDENTIFY_UTF8)) {
299: /*
300: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
301: * exist (in that order) to contain UTF-8, it is a safe
302: * assumption that either they are using a UTF-8 terminal, or
303: * if not they know that output from UTF-8-capable programs may
304: * be wrong.
305: */
1.106 nicm 306: if ((s = getenv("LC_ALL")) == NULL || *s == '\0') {
307: if ((s = getenv("LC_CTYPE")) == NULL || *s == '\0')
1.15 nicm 308: s = getenv("LANG");
309: }
1.26 nicm 310: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
311: strcasestr(s, "UTF8") != NULL))
1.15 nicm 312: flags |= IDENTIFY_UTF8;
313: }
314:
1.42 nicm 315: environ_init(&global_environ);
1.62 nicm 316: for (var = environ; *var != NULL; var++)
1.42 nicm 317: environ_put(&global_environ, *var);
1.63 nicm 318:
319: options_init(&global_options, NULL);
1.99 nicm 320: options_table_populate_tree(server_options_table, &global_options);
321: options_set_number(&global_options, "quiet", quiet);
1.42 nicm 322:
1.12 nicm 323: options_init(&global_s_options, NULL);
1.99 nicm 324: options_table_populate_tree(session_options_table, &global_s_options);
325: options_set_string(&global_s_options, "default-shell", "%s", getshell());
1.44 nicm 326:
1.99 nicm 327: options_init(&global_w_options, NULL);
328: options_table_populate_tree(window_options_table, &global_w_options);
1.42 nicm 329:
1.99 nicm 330: /* Enable UTF-8 if the first client is on UTF-8 terminal. */
1.62 nicm 331: if (flags & IDENTIFY_UTF8) {
1.99 nicm 332: options_set_number(&global_s_options, "status-utf8", 1);
1.100 nicm 333: options_set_number(&global_s_options, "mouse-utf8", 1);
1.99 nicm 334: options_set_number(&global_w_options, "utf8", 1);
1.42 nicm 335: }
1.94 nicm 336:
1.99 nicm 337: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 338: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
339: if (strrchr(s, '/') != NULL)
340: s = strrchr(s, '/') + 1;
341: if (strstr(s, "vi") != NULL)
342: keys = MODEKEY_VI;
1.99 nicm 343: else
344: keys = MODEKEY_EMACS;
345: options_set_number(&global_s_options, "status-keys", keys);
346: options_set_number(&global_w_options, "mode-keys", keys);
1.94 nicm 347: }
1.1 nicm 348:
1.92 nicm 349: /* Locate the configuration file. */
1.1 nicm 350: if (cfg_file == NULL) {
351: home = getenv("HOME");
352: if (home == NULL || *home == '\0') {
353: pw = getpwuid(getuid());
354: if (pw != NULL)
355: home = pw->pw_dir;
356: }
357: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
1.69 nicm 358: if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
1.112 nicm 359: free(cfg_file);
1.1 nicm 360: cfg_file = NULL;
361: }
362: }
1.62 nicm 363:
1.68 nicm 364: /*
1.92 nicm 365: * Figure out the socket path. If specified on the command-line with -S
366: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 367: */
1.92 nicm 368: parseenvironment();
1.68 nicm 369: if (path == NULL) {
1.92 nicm 370: /* If no -L, use the environment. */
1.68 nicm 371: if (label == NULL) {
1.92 nicm 372: if (environ_path != NULL)
373: path = xstrdup(environ_path);
374: else
1.68 nicm 375: label = xstrdup("default");
376: }
377:
378: /* -L or default set. */
379: if (label != NULL) {
1.92 nicm 380: if ((path = makesocketpath(label)) == NULL) {
1.109 nicm 381: fprintf(stderr, "can't create socket\n");
1.68 nicm 382: exit(1);
383: }
384: }
1.1 nicm 385: }
1.112 nicm 386: free(label);
1.113 nicm 387: strlcpy(socket_path, path, sizeof socket_path);
1.112 nicm 388: free(path);
1.1 nicm 389:
1.92 nicm 390: /* Set process title. */
391: setproctitle("%s (%s)", __progname, socket_path);
1.1 nicm 392:
1.92 nicm 393: /* Pass control to the client. */
1.78 nicm 394: ev_base = event_init();
1.92 nicm 395: exit(client_main(argc, argv, flags));
1.1 nicm 396: }
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