Annotation of src/usr.bin/tmux/tmux.c, Revision 1.159
1.159 ! nicm 1: /* $OpenBSD: tmux.c,v 1.158 2015/11/24 21:52:06 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:
1.148 nicm 37: struct options *global_options; /* server options */
38: struct options *global_s_options; /* session options */
39: struct options *global_w_options; /* window options */
1.149 nicm 40: struct environ *global_environ;
1.1 nicm 41:
1.92 nicm 42: char *shell_cmd;
1.158 nicm 43: struct timeval start_time;
1.132 nicm 44: char socket_path[PATH_MAX];
1.70 nicm 45:
1.1 nicm 46: __dead void usage(void);
1.92 nicm 47: char *makesocketpath(const char *);
1.55 nicm 48:
1.1 nicm 49: __dead void
50: usage(void)
51: {
1.4 sobrado 52: fprintf(stderr,
1.136 jmc 53: "usage: %s [-2Cluv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 54: " [-S socket-path] [command [flags]]\n",
1.1 nicm 55: __progname);
56: exit(1);
57: }
58:
1.39 nicm 59: const char *
60: getshell(void)
61: {
62: struct passwd *pw;
63: const char *shell;
64:
65: shell = getenv("SHELL");
66: if (checkshell(shell))
67: return (shell);
68:
69: pw = getpwuid(getuid());
70: if (pw != NULL && checkshell(pw->pw_shell))
71: return (pw->pw_shell);
72:
73: return (_PATH_BSHELL);
74: }
75:
76: int
77: checkshell(const char *shell)
78: {
1.105 nicm 79: if (shell == NULL || *shell == '\0' || *shell != '/')
80: return (0);
81: if (areshell(shell))
1.39 nicm 82: return (0);
83: if (access(shell, X_OK) != 0)
84: return (0);
85: return (1);
86: }
87:
88: int
89: areshell(const char *shell)
90: {
91: const char *progname, *ptr;
92:
93: if ((ptr = strrchr(shell, '/')) != NULL)
94: ptr++;
95: else
96: ptr = shell;
97: progname = __progname;
98: if (*progname == '-')
99: progname++;
100: if (strcmp(ptr, progname) == 0)
101: return (1);
102: return (0);
1.107 nicm 103: }
104:
1.1 nicm 105: char *
1.92 nicm 106: makesocketpath(const char *label)
1.1 nicm 107: {
1.132 nicm 108: char base[PATH_MAX], realbase[PATH_MAX], *path, *s;
1.1 nicm 109: struct stat sb;
110: u_int uid;
111:
112: uid = getuid();
1.118 nicm 113: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
114: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
115: else
1.102 nicm 116: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 117:
118: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
119: return (NULL);
120:
121: if (lstat(base, &sb) != 0)
122: return (NULL);
123: if (!S_ISDIR(sb.st_mode)) {
124: errno = ENOTDIR;
125: return (NULL);
126: }
1.134 nicm 127: if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
1.1 nicm 128: errno = EACCES;
129: return (NULL);
130: }
131:
1.113 nicm 132: if (realpath(base, realbase) == NULL)
133: strlcpy(realbase, base, sizeof realbase);
134:
135: xasprintf(&path, "%s/%s", realbase, label);
1.1 nicm 136: return (path);
137: }
138:
1.101 nicm 139: void
140: setblocking(int fd, int state)
141: {
142: int mode;
143:
144: if ((mode = fcntl(fd, F_GETFL)) != -1) {
145: if (!state)
146: mode |= O_NONBLOCK;
147: else
148: mode &= ~O_NONBLOCK;
149: fcntl(fd, F_SETFL, mode);
150: }
151: }
152:
1.138 nicm 153: const char *
1.137 nicm 154: find_home(void)
155: {
1.142 nicm 156: struct passwd *pw;
157: static const char *home;
158:
159: if (home != NULL)
160: return (home);
1.137 nicm 161:
162: home = getenv("HOME");
163: if (home == NULL || *home == '\0') {
164: pw = getpwuid(getuid());
165: if (pw != NULL)
166: home = pw->pw_dir;
167: else
168: home = NULL;
169: }
170:
1.138 nicm 171: return (home);
1.137 nicm 172: }
173:
1.1 nicm 174: int
175: main(int argc, char **argv)
176: {
1.152 nicm 177: char *path, *label, **var, tmp[PATH_MAX];
178: const char *s;
179: int opt, flags, keys;
1.119 nicm 180:
181: setlocale(LC_TIME, "");
1.144 nicm 182: tzset();
1.1 nicm 183:
1.140 nicm 184: if (**argv == '-')
185: flags = CLIENT_LOGIN;
186: else
187: flags = 0;
188:
1.92 nicm 189: label = path = NULL;
1.117 nicm 190: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 191: switch (opt) {
1.1 nicm 192: case '2':
1.124 nicm 193: flags |= CLIENT_256COLOURS;
1.1 nicm 194: break;
1.46 nicm 195: case 'c':
1.112 nicm 196: free(shell_cmd);
1.92 nicm 197: shell_cmd = xstrdup(optarg);
1.111 nicm 198: break;
199: case 'C':
1.124 nicm 200: if (flags & CLIENT_CONTROL)
201: flags |= CLIENT_CONTROLCONTROL;
1.111 nicm 202: else
1.124 nicm 203: flags |= CLIENT_CONTROL;
1.37 nicm 204: break;
1.1 nicm 205: case 'f':
1.142 nicm 206: set_cfg_file(optarg);
1.41 nicm 207: break;
208: case 'l':
1.140 nicm 209: flags |= CLIENT_LOGIN;
1.1 nicm 210: break;
211: case 'L':
1.112 nicm 212: free(label);
1.1 nicm 213: label = xstrdup(optarg);
214: break;
1.37 nicm 215: case 'q':
216: break;
1.1 nicm 217: case 'S':
1.112 nicm 218: free(path);
1.1 nicm 219: path = xstrdup(optarg);
220: break;
221: case 'u':
1.124 nicm 222: flags |= CLIENT_UTF8;
1.1 nicm 223: break;
224: case 'v':
1.157 nicm 225: log_add_level();
1.1 nicm 226: break;
1.53 deraadt 227: default:
1.1 nicm 228: usage();
1.53 deraadt 229: }
230: }
1.1 nicm 231: argc -= optind;
232: argv += optind;
233:
1.92 nicm 234: if (shell_cmd != NULL && argc != 0)
1.46 nicm 235: usage();
1.145 nicm 236:
1.156 nicm 237: if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
238: "recvfd proc exec tty ps", NULL) != 0)
1.145 nicm 239: err(1, "pledge");
1.46 nicm 240:
1.152 nicm 241: /*
242: * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
243: * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
244: * UTF-8, it is a safe assumption that either they are using a UTF-8
245: * terminal, or if not they know that output from UTF-8-capable
246: * programs may be wrong.
247: */
248: if (getenv("TMUX") != NULL)
249: flags |= CLIENT_UTF8;
250: else {
251: s = getenv("LC_ALL");
252: if (s == NULL || *s == '\0')
253: s = getenv("LC_CTYPE");
254: if (s == NULL || *s == '\0')
255: s = getenv("LANG");
256: if (s == NULL || *s == '\0')
257: s = "";
258: if (strcasestr(s, "UTF-8") != NULL ||
259: strcasestr(s, "UTF8") != NULL)
1.124 nicm 260: flags |= CLIENT_UTF8;
1.15 nicm 261: }
262:
1.149 nicm 263: global_environ = environ_create();
1.62 nicm 264: for (var = environ; *var != NULL; var++)
1.149 nicm 265: environ_put(global_environ, *var);
1.125 nicm 266: if (getcwd(tmp, sizeof tmp) != NULL)
1.149 nicm 267: environ_set(global_environ, "PWD", tmp);
1.63 nicm 268:
1.148 nicm 269: global_options = options_create(NULL);
1.155 nicm 270: options_table_populate_tree(OPTIONS_TABLE_SERVER, global_options);
1.42 nicm 271:
1.148 nicm 272: global_s_options = options_create(NULL);
1.155 nicm 273: options_table_populate_tree(OPTIONS_TABLE_SESSION, global_s_options);
1.148 nicm 274: options_set_string(global_s_options, "default-shell", "%s", getshell());
1.44 nicm 275:
1.148 nicm 276: global_w_options = options_create(NULL);
1.155 nicm 277: options_table_populate_tree(OPTIONS_TABLE_WINDOW, global_w_options);
1.94 nicm 278:
1.99 nicm 279: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 280: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
281: if (strrchr(s, '/') != NULL)
282: s = strrchr(s, '/') + 1;
283: if (strstr(s, "vi") != NULL)
284: keys = MODEKEY_VI;
1.99 nicm 285: else
286: keys = MODEKEY_EMACS;
1.148 nicm 287: options_set_number(global_s_options, "status-keys", keys);
288: options_set_number(global_w_options, "mode-keys", keys);
1.1 nicm 289: }
1.62 nicm 290:
1.68 nicm 291: /*
1.92 nicm 292: * Figure out the socket path. If specified on the command-line with -S
293: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 294: */
295: if (path == NULL) {
1.92 nicm 296: /* If no -L, use the environment. */
1.68 nicm 297: if (label == NULL) {
1.141 nicm 298: s = getenv("TMUX");
299: if (s != NULL) {
300: path = xstrdup(s);
301: path[strcspn (path, ",")] = '\0';
302: if (*path == '\0') {
303: free(path);
304: label = xstrdup("default");
305: }
1.143 nicm 306: } else
1.68 nicm 307: label = xstrdup("default");
308: }
309:
310: /* -L or default set. */
311: if (label != NULL) {
1.92 nicm 312: if ((path = makesocketpath(label)) == NULL) {
1.123 nicm 313: fprintf(stderr, "can't create socket: %s\n",
1.141 nicm 314: strerror(errno));
1.68 nicm 315: exit(1);
316: }
317: }
1.1 nicm 318: }
1.112 nicm 319: free(label);
1.127 nicm 320:
1.141 nicm 321: if (strlcpy(socket_path, path, sizeof socket_path) >=
322: sizeof socket_path) {
1.127 nicm 323: fprintf(stderr, "socket path too long: %s\n", path);
324: exit(1);
325: }
1.112 nicm 326: free(path);
1.1 nicm 327:
1.92 nicm 328: /* Pass control to the client. */
1.139 nicm 329: exit(client_main(event_init(), argc, argv, flags));
1.1 nicm 330: }
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