Annotation of src/usr.bin/tmux/tmux.c, Revision 1.157
1.157 ! nicm 1: /* $OpenBSD: tmux.c,v 1.156 2015/11/22 19:41:19 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: time_t start_time;
1.132 nicm 48: char socket_path[PATH_MAX];
1.70 nicm 49:
1.1 nicm 50: __dead void usage(void);
1.92 nicm 51: char *makesocketpath(const char *);
1.55 nicm 52:
1.1 nicm 53: __dead void
54: usage(void)
55: {
1.4 sobrado 56: fprintf(stderr,
1.136 jmc 57: "usage: %s [-2Cluv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 58: " [-S socket-path] [command [flags]]\n",
1.1 nicm 59: __progname);
60: exit(1);
61: }
62:
1.39 nicm 63: const char *
64: getshell(void)
65: {
66: struct passwd *pw;
67: const char *shell;
68:
69: shell = getenv("SHELL");
70: if (checkshell(shell))
71: return (shell);
72:
73: pw = getpwuid(getuid());
74: if (pw != NULL && checkshell(pw->pw_shell))
75: return (pw->pw_shell);
76:
77: return (_PATH_BSHELL);
78: }
79:
80: int
81: checkshell(const char *shell)
82: {
1.105 nicm 83: if (shell == NULL || *shell == '\0' || *shell != '/')
84: return (0);
85: if (areshell(shell))
1.39 nicm 86: return (0);
87: if (access(shell, X_OK) != 0)
88: return (0);
89: return (1);
90: }
91:
92: int
93: areshell(const char *shell)
94: {
95: const char *progname, *ptr;
96:
97: if ((ptr = strrchr(shell, '/')) != NULL)
98: ptr++;
99: else
100: ptr = shell;
101: progname = __progname;
102: if (*progname == '-')
103: progname++;
104: if (strcmp(ptr, progname) == 0)
105: return (1);
106: return (0);
1.107 nicm 107: }
108:
1.1 nicm 109: char *
1.92 nicm 110: makesocketpath(const char *label)
1.1 nicm 111: {
1.132 nicm 112: char base[PATH_MAX], realbase[PATH_MAX], *path, *s;
1.1 nicm 113: struct stat sb;
114: u_int uid;
115:
116: uid = getuid();
1.118 nicm 117: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
118: xsnprintf(base, sizeof base, "%s/tmux-%u", s, uid);
119: else
1.102 nicm 120: xsnprintf(base, sizeof base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 121:
122: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
123: return (NULL);
124:
125: if (lstat(base, &sb) != 0)
126: return (NULL);
127: if (!S_ISDIR(sb.st_mode)) {
128: errno = ENOTDIR;
129: return (NULL);
130: }
1.134 nicm 131: if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
1.1 nicm 132: errno = EACCES;
133: return (NULL);
134: }
135:
1.113 nicm 136: if (realpath(base, realbase) == NULL)
137: strlcpy(realbase, base, sizeof realbase);
138:
139: xasprintf(&path, "%s/%s", realbase, label);
1.1 nicm 140: return (path);
141: }
142:
1.101 nicm 143: void
144: setblocking(int fd, int state)
145: {
146: int mode;
147:
148: if ((mode = fcntl(fd, F_GETFL)) != -1) {
149: if (!state)
150: mode |= O_NONBLOCK;
151: else
152: mode &= ~O_NONBLOCK;
153: fcntl(fd, F_SETFL, mode);
154: }
155: }
156:
1.138 nicm 157: const char *
1.137 nicm 158: find_home(void)
159: {
1.142 nicm 160: struct passwd *pw;
161: static const char *home;
162:
163: if (home != NULL)
164: return (home);
1.137 nicm 165:
166: home = getenv("HOME");
167: if (home == NULL || *home == '\0') {
168: pw = getpwuid(getuid());
169: if (pw != NULL)
170: home = pw->pw_dir;
171: else
172: home = NULL;
173: }
174:
1.138 nicm 175: return (home);
1.137 nicm 176: }
177:
1.1 nicm 178: int
179: main(int argc, char **argv)
180: {
1.152 nicm 181: char *path, *label, **var, tmp[PATH_MAX];
182: const char *s;
183: int opt, flags, keys;
1.54 nicm 184:
185: #ifdef DEBUG
186: malloc_options = (char *) "AFGJPX";
187: #endif
1.119 nicm 188:
189: setlocale(LC_TIME, "");
1.144 nicm 190: tzset();
1.1 nicm 191:
1.140 nicm 192: if (**argv == '-')
193: flags = CLIENT_LOGIN;
194: else
195: flags = 0;
196:
1.92 nicm 197: label = path = NULL;
1.117 nicm 198: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 199: switch (opt) {
1.1 nicm 200: case '2':
1.124 nicm 201: flags |= CLIENT_256COLOURS;
1.1 nicm 202: break;
1.46 nicm 203: case 'c':
1.112 nicm 204: free(shell_cmd);
1.92 nicm 205: shell_cmd = xstrdup(optarg);
1.111 nicm 206: break;
207: case 'C':
1.124 nicm 208: if (flags & CLIENT_CONTROL)
209: flags |= CLIENT_CONTROLCONTROL;
1.111 nicm 210: else
1.124 nicm 211: flags |= CLIENT_CONTROL;
1.37 nicm 212: break;
1.1 nicm 213: case 'f':
1.142 nicm 214: set_cfg_file(optarg);
1.41 nicm 215: break;
216: case 'l':
1.140 nicm 217: flags |= CLIENT_LOGIN;
1.1 nicm 218: break;
219: case 'L':
1.112 nicm 220: free(label);
1.1 nicm 221: label = xstrdup(optarg);
222: break;
1.37 nicm 223: case 'q':
224: break;
1.1 nicm 225: case 'S':
1.112 nicm 226: free(path);
1.1 nicm 227: path = xstrdup(optarg);
228: break;
229: case 'u':
1.124 nicm 230: flags |= CLIENT_UTF8;
1.1 nicm 231: break;
232: case 'v':
1.157 ! nicm 233: log_add_level();
1.1 nicm 234: break;
1.53 deraadt 235: default:
1.1 nicm 236: usage();
1.53 deraadt 237: }
238: }
1.1 nicm 239: argc -= optind;
240: argv += optind;
241:
1.92 nicm 242: if (shell_cmd != NULL && argc != 0)
1.46 nicm 243: usage();
1.145 nicm 244:
1.156 nicm 245: if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
246: "recvfd proc exec tty ps", NULL) != 0)
1.145 nicm 247: err(1, "pledge");
1.46 nicm 248:
1.152 nicm 249: /*
250: * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
251: * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
252: * UTF-8, it is a safe assumption that either they are using a UTF-8
253: * terminal, or if not they know that output from UTF-8-capable
254: * programs may be wrong.
255: */
256: if (getenv("TMUX") != NULL)
257: flags |= CLIENT_UTF8;
258: else {
259: s = getenv("LC_ALL");
260: if (s == NULL || *s == '\0')
261: s = getenv("LC_CTYPE");
262: if (s == NULL || *s == '\0')
263: s = getenv("LANG");
264: if (s == NULL || *s == '\0')
265: s = "";
266: if (strcasestr(s, "UTF-8") != NULL ||
267: strcasestr(s, "UTF8") != NULL)
1.124 nicm 268: flags |= CLIENT_UTF8;
1.15 nicm 269: }
270:
1.149 nicm 271: global_environ = environ_create();
1.62 nicm 272: for (var = environ; *var != NULL; var++)
1.149 nicm 273: environ_put(global_environ, *var);
1.125 nicm 274: if (getcwd(tmp, sizeof tmp) != NULL)
1.149 nicm 275: environ_set(global_environ, "PWD", tmp);
1.63 nicm 276:
1.148 nicm 277: global_options = options_create(NULL);
1.155 nicm 278: options_table_populate_tree(OPTIONS_TABLE_SERVER, global_options);
1.42 nicm 279:
1.148 nicm 280: global_s_options = options_create(NULL);
1.155 nicm 281: options_table_populate_tree(OPTIONS_TABLE_SESSION, global_s_options);
1.148 nicm 282: options_set_string(global_s_options, "default-shell", "%s", getshell());
1.44 nicm 283:
1.148 nicm 284: global_w_options = options_create(NULL);
1.155 nicm 285: options_table_populate_tree(OPTIONS_TABLE_WINDOW, global_w_options);
1.94 nicm 286:
1.99 nicm 287: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 288: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
289: if (strrchr(s, '/') != NULL)
290: s = strrchr(s, '/') + 1;
291: if (strstr(s, "vi") != NULL)
292: keys = MODEKEY_VI;
1.99 nicm 293: else
294: keys = MODEKEY_EMACS;
1.148 nicm 295: options_set_number(global_s_options, "status-keys", keys);
296: options_set_number(global_w_options, "mode-keys", keys);
1.1 nicm 297: }
1.62 nicm 298:
1.68 nicm 299: /*
1.92 nicm 300: * Figure out the socket path. If specified on the command-line with -S
301: * or -L, use it, otherwise try $TMUX or assume -L default.
1.68 nicm 302: */
303: if (path == NULL) {
1.92 nicm 304: /* If no -L, use the environment. */
1.68 nicm 305: if (label == NULL) {
1.141 nicm 306: s = getenv("TMUX");
307: if (s != NULL) {
308: path = xstrdup(s);
309: path[strcspn (path, ",")] = '\0';
310: if (*path == '\0') {
311: free(path);
312: label = xstrdup("default");
313: }
1.143 nicm 314: } else
1.68 nicm 315: label = xstrdup("default");
316: }
317:
318: /* -L or default set. */
319: if (label != NULL) {
1.92 nicm 320: if ((path = makesocketpath(label)) == NULL) {
1.123 nicm 321: fprintf(stderr, "can't create socket: %s\n",
1.141 nicm 322: strerror(errno));
1.68 nicm 323: exit(1);
324: }
325: }
1.1 nicm 326: }
1.112 nicm 327: free(label);
1.127 nicm 328:
1.141 nicm 329: if (strlcpy(socket_path, path, sizeof socket_path) >=
330: sizeof socket_path) {
1.127 nicm 331: fprintf(stderr, "socket path too long: %s\n", path);
332: exit(1);
333: }
1.112 nicm 334: free(path);
1.1 nicm 335:
1.92 nicm 336: /* Pass control to the client. */
1.139 nicm 337: exit(client_main(event_init(), argc, argv, flags));
1.1 nicm 338: }
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