Annotation of src/usr.bin/tmux/tmux.c, Revision 1.155
1.155 ! nicm 1: /* $OpenBSD: tmux.c,v 1.154 2015/11/15 14:32:48 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:
1.145 nicm 22: #include <err.h>
1.1 nicm 23: #include <errno.h>
1.55 nicm 24: #include <event.h>
1.91 nicm 25: #include <fcntl.h>
1.132 nicm 26: #include <getopt.h>
1.119 nicm 27: #include <locale.h>
1.1 nicm 28: #include <paths.h>
29: #include <pwd.h>
30: #include <stdlib.h>
31: #include <string.h>
1.147 nicm 32: #include <time.h>
1.1 nicm 33: #include <unistd.h>
34:
35: #include "tmux.h"
36:
37: #ifdef DEBUG
1.54 nicm 38: extern char *malloc_options;
1.1 nicm 39: #endif
40:
1.148 nicm 41: struct options *global_options; /* server options */
42: struct options *global_s_options; /* session options */
43: struct options *global_w_options; /* window options */
1.149 nicm 44: struct environ *global_environ;
1.1 nicm 45:
1.92 nicm 46: char *shell_cmd;
1.1 nicm 47: int debug_level;
48: time_t start_time;
1.132 nicm 49: char socket_path[PATH_MAX];
1.70 nicm 50:
1.1 nicm 51: __dead void usage(void);
1.92 nicm 52: char *makesocketpath(const char *);
1.55 nicm 53:
1.1 nicm 54: __dead void
55: usage(void)
56: {
1.4 sobrado 57: fprintf(stderr,
1.136 jmc 58: "usage: %s [-2Cluv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 59: " [-S socket-path] [command [flags]]\n",
1.1 nicm 60: __progname);
61: exit(1);
62: }
63:
64: void
65: logfile(const char *name)
66: {
67: char *path;
68:
69: if (debug_level > 0) {
1.32 nicm 70: xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
1.130 nicm 71: log_open(path);
1.112 nicm 72: free(path);
1.1 nicm 73: }
74: }
75:
1.39 nicm 76: const char *
77: getshell(void)
78: {
79: struct passwd *pw;
80: const char *shell;
81:
82: shell = getenv("SHELL");
83: if (checkshell(shell))
84: return (shell);
85:
86: pw = getpwuid(getuid());
87: if (pw != NULL && checkshell(pw->pw_shell))
88: return (pw->pw_shell);
89:
90: return (_PATH_BSHELL);
91: }
92:
93: int
94: checkshell(const char *shell)
95: {
1.105 nicm 96: if (shell == NULL || *shell == '\0' || *shell != '/')
97: return (0);
98: if (areshell(shell))
1.39 nicm 99: return (0);
100: if (access(shell, X_OK) != 0)
101: return (0);
102: return (1);
103: }
104:
105: int
106: areshell(const char *shell)
107: {
108: const char *progname, *ptr;
109:
110: if ((ptr = strrchr(shell, '/')) != NULL)
111: ptr++;
112: else
113: ptr = shell;
114: progname = __progname;
115: if (*progname == '-')
116: progname++;
117: if (strcmp(ptr, progname) == 0)
118: return (1);
119: return (0);
1.107 nicm 120: }
121:
1.1 nicm 122: char *
1.92 nicm 123: makesocketpath(const char *label)
1.1 nicm 124: {
1.132 nicm 125: char base[PATH_MAX], realbase[PATH_MAX], *path, *s;
1.1 nicm 126: struct stat sb;
127: u_int uid;
128:
129: uid = getuid();
1.118 nicm 130: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
131: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
132: else
1.102 nicm 133: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 134:
135: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
136: return (NULL);
137:
138: if (lstat(base, &sb) != 0)
139: return (NULL);
140: if (!S_ISDIR(sb.st_mode)) {
141: errno = ENOTDIR;
142: return (NULL);
143: }
1.134 nicm 144: if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
1.1 nicm 145: errno = EACCES;
146: return (NULL);
147: }
148:
1.113 nicm 149: if (realpath(base, realbase) == NULL)
150: strlcpy(realbase, base, sizeof realbase);
151:
152: xasprintf(&path, "%s/%s", realbase, label);
1.1 nicm 153: return (path);
154: }
155:
1.101 nicm 156: void
157: setblocking(int fd, int state)
158: {
159: int mode;
160:
161: if ((mode = fcntl(fd, F_GETFL)) != -1) {
162: if (!state)
163: mode |= O_NONBLOCK;
164: else
165: mode &= ~O_NONBLOCK;
166: fcntl(fd, F_SETFL, mode);
167: }
168: }
169:
1.138 nicm 170: const char *
1.137 nicm 171: find_home(void)
172: {
1.142 nicm 173: struct passwd *pw;
174: static const char *home;
175:
176: if (home != NULL)
177: return (home);
1.137 nicm 178:
179: home = getenv("HOME");
180: if (home == NULL || *home == '\0') {
181: pw = getpwuid(getuid());
182: if (pw != NULL)
183: home = pw->pw_dir;
184: else
185: home = NULL;
186: }
187:
1.138 nicm 188: return (home);
1.137 nicm 189: }
190:
1.1 nicm 191: int
192: main(int argc, char **argv)
193: {
1.152 nicm 194: char *path, *label, **var, tmp[PATH_MAX];
195: const char *s;
196: int opt, flags, keys;
1.54 nicm 197:
198: #ifdef DEBUG
199: malloc_options = (char *) "AFGJPX";
200: #endif
1.119 nicm 201:
202: setlocale(LC_TIME, "");
1.144 nicm 203: tzset();
1.1 nicm 204:
1.140 nicm 205: if (**argv == '-')
206: flags = CLIENT_LOGIN;
207: else
208: flags = 0;
209:
1.92 nicm 210: label = path = NULL;
1.117 nicm 211: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 212: switch (opt) {
1.1 nicm 213: case '2':
1.124 nicm 214: flags |= CLIENT_256COLOURS;
1.1 nicm 215: break;
1.46 nicm 216: case 'c':
1.112 nicm 217: free(shell_cmd);
1.92 nicm 218: shell_cmd = xstrdup(optarg);
1.111 nicm 219: break;
220: case 'C':
1.124 nicm 221: if (flags & CLIENT_CONTROL)
222: flags |= CLIENT_CONTROLCONTROL;
1.111 nicm 223: else
1.124 nicm 224: flags |= CLIENT_CONTROL;
1.37 nicm 225: break;
1.1 nicm 226: case 'f':
1.142 nicm 227: set_cfg_file(optarg);
1.41 nicm 228: break;
229: case 'l':
1.140 nicm 230: flags |= CLIENT_LOGIN;
1.1 nicm 231: break;
232: case 'L':
1.112 nicm 233: free(label);
1.1 nicm 234: label = xstrdup(optarg);
235: break;
1.37 nicm 236: case 'q':
237: break;
1.1 nicm 238: case 'S':
1.112 nicm 239: free(path);
1.1 nicm 240: path = xstrdup(optarg);
241: break;
242: case 'u':
1.124 nicm 243: flags |= CLIENT_UTF8;
1.1 nicm 244: break;
245: case 'v':
246: debug_level++;
247: break;
1.53 deraadt 248: default:
1.1 nicm 249: usage();
1.53 deraadt 250: }
251: }
1.1 nicm 252: argc -= optind;
253: argv += optind;
254:
1.92 nicm 255: if (shell_cmd != NULL && argc != 0)
1.46 nicm 256: usage();
1.145 nicm 257:
1.154 nicm 258: if (pledge("stdio rpath wpath cpath flock fattr unix sendfd recvfd "
1.145 nicm 259: "proc exec tty ps", NULL) != 0)
260: err(1, "pledge");
1.46 nicm 261:
1.152 nicm 262: /*
263: * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
264: * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
265: * UTF-8, it is a safe assumption that either they are using a UTF-8
266: * terminal, or if not they know that output from UTF-8-capable
267: * programs may be wrong.
268: */
269: if (getenv("TMUX") != NULL)
270: flags |= CLIENT_UTF8;
271: else {
272: s = getenv("LC_ALL");
273: if (s == NULL || *s == '\0')
274: s = getenv("LC_CTYPE");
275: if (s == NULL || *s == '\0')
276: s = getenv("LANG");
277: if (s == NULL || *s == '\0')
278: s = "";
279: if (strcasestr(s, "UTF-8") != NULL ||
280: strcasestr(s, "UTF8") != NULL)
1.124 nicm 281: flags |= CLIENT_UTF8;
1.15 nicm 282: }
283:
1.149 nicm 284: global_environ = environ_create();
1.62 nicm 285: for (var = environ; *var != NULL; var++)
1.149 nicm 286: environ_put(global_environ, *var);
1.125 nicm 287: if (getcwd(tmp, sizeof tmp) != NULL)
1.149 nicm 288: environ_set(global_environ, "PWD", tmp);
1.63 nicm 289:
1.148 nicm 290: global_options = options_create(NULL);
1.155 ! nicm 291: options_table_populate_tree(OPTIONS_TABLE_SERVER, global_options);
1.42 nicm 292:
1.148 nicm 293: global_s_options = options_create(NULL);
1.155 ! nicm 294: options_table_populate_tree(OPTIONS_TABLE_SESSION, global_s_options);
1.148 nicm 295: options_set_string(global_s_options, "default-shell", "%s", getshell());
1.44 nicm 296:
1.148 nicm 297: global_w_options = options_create(NULL);
1.155 ! nicm 298: options_table_populate_tree(OPTIONS_TABLE_WINDOW, global_w_options);
1.94 nicm 299:
1.99 nicm 300: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 301: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
302: if (strrchr(s, '/') != NULL)
303: s = strrchr(s, '/') + 1;
304: if (strstr(s, "vi") != NULL)
305: keys = MODEKEY_VI;
1.99 nicm 306: else
307: keys = MODEKEY_EMACS;
1.148 nicm 308: options_set_number(global_s_options, "status-keys", keys);
309: options_set_number(global_w_options, "mode-keys", keys);
1.1 nicm 310: }
1.62 nicm 311:
1.68 nicm 312: /*
1.92 nicm 313: * Figure out the socket path. If specified on the command-line with -S
314: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 315: */
316: if (path == NULL) {
1.92 nicm 317: /* If no -L, use the environment. */
1.68 nicm 318: if (label == NULL) {
1.141 nicm 319: s = getenv("TMUX");
320: if (s != NULL) {
321: path = xstrdup(s);
322: path[strcspn (path, ",")] = '\0';
323: if (*path == '\0') {
324: free(path);
325: label = xstrdup("default");
326: }
1.143 nicm 327: } else
1.68 nicm 328: label = xstrdup("default");
329: }
330:
331: /* -L or default set. */
332: if (label != NULL) {
1.92 nicm 333: if ((path = makesocketpath(label)) == NULL) {
1.123 nicm 334: fprintf(stderr, "can't create socket: %s\n",
1.141 nicm 335: strerror(errno));
1.68 nicm 336: exit(1);
337: }
338: }
1.1 nicm 339: }
1.112 nicm 340: free(label);
1.127 nicm 341:
1.141 nicm 342: if (strlcpy(socket_path, path, sizeof socket_path) >=
343: sizeof socket_path) {
1.127 nicm 344: fprintf(stderr, "socket path too long: %s\n", path);
345: exit(1);
346: }
1.112 nicm 347: free(path);
1.1 nicm 348:
1.92 nicm 349: /* Pass control to the client. */
1.139 nicm 350: exit(client_main(event_init(), argc, argv, flags));
1.1 nicm 351: }
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