Annotation of src/usr.bin/tmux/tmux.c, Revision 1.162
1.162 ! nicm 1: /* $OpenBSD: tmux.c,v 1.161 2015/11/24 23:22:51 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:
1.158 nicm 42: struct timeval start_time;
1.160 nicm 43: const char *socket_path;
1.70 nicm 44:
1.1 nicm 45: __dead void usage(void);
1.160 nicm 46: static char *make_label(const char *);
1.55 nicm 47:
1.1 nicm 48: __dead void
49: usage(void)
50: {
1.4 sobrado 51: fprintf(stderr,
1.136 jmc 52: "usage: %s [-2Cluv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 53: " [-S socket-path] [command [flags]]\n",
1.1 nicm 54: __progname);
55: exit(1);
56: }
57:
1.39 nicm 58: const char *
59: getshell(void)
60: {
61: struct passwd *pw;
62: const char *shell;
63:
64: shell = getenv("SHELL");
65: if (checkshell(shell))
66: return (shell);
67:
68: pw = getpwuid(getuid());
69: if (pw != NULL && checkshell(pw->pw_shell))
70: return (pw->pw_shell);
71:
72: return (_PATH_BSHELL);
73: }
74:
75: int
76: checkshell(const char *shell)
77: {
1.105 nicm 78: if (shell == NULL || *shell == '\0' || *shell != '/')
79: return (0);
80: if (areshell(shell))
1.39 nicm 81: return (0);
82: if (access(shell, X_OK) != 0)
83: return (0);
84: return (1);
85: }
86:
87: int
88: areshell(const char *shell)
89: {
90: const char *progname, *ptr;
91:
92: if ((ptr = strrchr(shell, '/')) != NULL)
93: ptr++;
94: else
95: ptr = shell;
96: progname = __progname;
97: if (*progname == '-')
98: progname++;
99: if (strcmp(ptr, progname) == 0)
100: return (1);
101: return (0);
1.107 nicm 102: }
103:
1.160 nicm 104: static char *
105: make_label(const char *label)
1.1 nicm 106: {
1.160 nicm 107: char *base, resolved[PATH_MAX], *path, *s;
108: struct stat sb;
109: u_int uid;
110: int saved_errno;
111:
112: if (label == NULL)
113: label = "default";
1.1 nicm 114:
115: uid = getuid();
1.160 nicm 116:
1.118 nicm 117: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
1.160 nicm 118: xasprintf(&base, "%s/tmux-%u", s, uid);
1.118 nicm 119: else
1.160 nicm 120: xasprintf(&base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 121:
122: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
1.160 nicm 123: goto fail;
1.1 nicm 124:
125: if (lstat(base, &sb) != 0)
1.160 nicm 126: goto fail;
1.1 nicm 127: if (!S_ISDIR(sb.st_mode)) {
128: errno = ENOTDIR;
1.160 nicm 129: goto fail;
1.1 nicm 130: }
1.134 nicm 131: if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
1.1 nicm 132: errno = EACCES;
1.160 nicm 133: goto fail;
1.1 nicm 134: }
135:
1.160 nicm 136: if (realpath(base, resolved) == NULL)
137: strlcpy(resolved, base, sizeof resolved);
138: xasprintf(&path, "%s/%s", resolved, label);
139: return (path);
1.113 nicm 140:
1.160 nicm 141: fail:
142: saved_errno = errno;
143: free(base);
144: errno = saved_errno;
145: return (NULL);
1.1 nicm 146: }
147:
1.101 nicm 148: void
149: setblocking(int fd, int state)
150: {
151: int mode;
152:
153: if ((mode = fcntl(fd, F_GETFL)) != -1) {
154: if (!state)
155: mode |= O_NONBLOCK;
156: else
157: mode &= ~O_NONBLOCK;
158: fcntl(fd, F_SETFL, mode);
159: }
160: }
161:
1.138 nicm 162: const char *
1.137 nicm 163: find_home(void)
164: {
1.142 nicm 165: struct passwd *pw;
166: static const char *home;
167:
168: if (home != NULL)
169: return (home);
1.137 nicm 170:
171: home = getenv("HOME");
172: if (home == NULL || *home == '\0') {
173: pw = getpwuid(getuid());
174: if (pw != NULL)
175: home = pw->pw_dir;
176: else
177: home = NULL;
178: }
179:
1.138 nicm 180: return (home);
1.137 nicm 181: }
182:
1.1 nicm 183: int
184: main(int argc, char **argv)
185: {
1.161 nicm 186: char *path, *label, **var, tmp[PATH_MAX], *shellcmd = NULL;
1.152 nicm 187: const char *s;
188: int opt, flags, keys;
1.119 nicm 189:
190: setlocale(LC_TIME, "");
1.144 nicm 191: tzset();
1.1 nicm 192:
1.140 nicm 193: if (**argv == '-')
194: flags = CLIENT_LOGIN;
195: else
196: flags = 0;
197:
1.92 nicm 198: label = path = NULL;
1.117 nicm 199: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 200: switch (opt) {
1.1 nicm 201: case '2':
1.124 nicm 202: flags |= CLIENT_256COLOURS;
1.1 nicm 203: break;
1.46 nicm 204: case 'c':
1.161 nicm 205: free(shellcmd);
206: shellcmd = xstrdup(optarg);
1.111 nicm 207: break;
208: case 'C':
1.124 nicm 209: if (flags & CLIENT_CONTROL)
210: flags |= CLIENT_CONTROLCONTROL;
1.111 nicm 211: else
1.124 nicm 212: flags |= CLIENT_CONTROL;
1.37 nicm 213: break;
1.1 nicm 214: case 'f':
1.142 nicm 215: set_cfg_file(optarg);
1.41 nicm 216: break;
217: case 'l':
1.140 nicm 218: flags |= CLIENT_LOGIN;
1.1 nicm 219: break;
220: case 'L':
1.112 nicm 221: free(label);
1.1 nicm 222: label = xstrdup(optarg);
223: break;
1.37 nicm 224: case 'q':
225: break;
1.1 nicm 226: case 'S':
1.112 nicm 227: free(path);
1.1 nicm 228: path = xstrdup(optarg);
229: break;
230: case 'u':
1.124 nicm 231: flags |= CLIENT_UTF8;
1.1 nicm 232: break;
233: case 'v':
1.157 nicm 234: log_add_level();
1.1 nicm 235: break;
1.53 deraadt 236: default:
1.1 nicm 237: usage();
1.53 deraadt 238: }
239: }
1.1 nicm 240: argc -= optind;
241: argv += optind;
242:
1.161 nicm 243: if (shellcmd != NULL && argc != 0)
1.46 nicm 244: usage();
1.145 nicm 245:
1.156 nicm 246: if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
247: "recvfd proc exec tty ps", NULL) != 0)
1.145 nicm 248: err(1, "pledge");
1.46 nicm 249:
1.152 nicm 250: /*
251: * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
252: * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
253: * UTF-8, it is a safe assumption that either they are using a UTF-8
254: * terminal, or if not they know that output from UTF-8-capable
255: * programs may be wrong.
256: */
257: if (getenv("TMUX") != NULL)
258: flags |= CLIENT_UTF8;
259: else {
260: s = getenv("LC_ALL");
261: if (s == NULL || *s == '\0')
262: s = getenv("LC_CTYPE");
263: if (s == NULL || *s == '\0')
264: s = getenv("LANG");
265: if (s == NULL || *s == '\0')
266: s = "";
267: if (strcasestr(s, "UTF-8") != NULL ||
268: strcasestr(s, "UTF8") != NULL)
1.124 nicm 269: flags |= CLIENT_UTF8;
1.15 nicm 270: }
271:
1.149 nicm 272: global_environ = environ_create();
1.62 nicm 273: for (var = environ; *var != NULL; var++)
1.149 nicm 274: environ_put(global_environ, *var);
1.125 nicm 275: if (getcwd(tmp, sizeof tmp) != NULL)
1.162 ! nicm 276: environ_set(global_environ, "PWD", "%s", tmp);
1.63 nicm 277:
1.148 nicm 278: global_options = options_create(NULL);
1.155 nicm 279: options_table_populate_tree(OPTIONS_TABLE_SERVER, global_options);
1.42 nicm 280:
1.148 nicm 281: global_s_options = options_create(NULL);
1.155 nicm 282: options_table_populate_tree(OPTIONS_TABLE_SESSION, global_s_options);
1.148 nicm 283: options_set_string(global_s_options, "default-shell", "%s", getshell());
1.44 nicm 284:
1.148 nicm 285: global_w_options = options_create(NULL);
1.155 nicm 286: options_table_populate_tree(OPTIONS_TABLE_WINDOW, global_w_options);
1.94 nicm 287:
1.99 nicm 288: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 289: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
290: if (strrchr(s, '/') != NULL)
291: s = strrchr(s, '/') + 1;
292: if (strstr(s, "vi") != NULL)
293: keys = MODEKEY_VI;
1.99 nicm 294: else
295: keys = MODEKEY_EMACS;
1.148 nicm 296: options_set_number(global_s_options, "status-keys", keys);
297: options_set_number(global_w_options, "mode-keys", keys);
1.1 nicm 298: }
1.62 nicm 299:
1.68 nicm 300: /*
1.160 nicm 301: * If socket is specified on the command-line with -S or -L, it is
302: * used. Otherwise, $TMUX is checked and if that fails "default" is
303: * used.
1.68 nicm 304: */
1.160 nicm 305: if (path == NULL && label == NULL) {
306: s = getenv("TMUX");
307: if (s != NULL && *s != '\0' && *s != ',') {
308: path = xstrdup(s);
309: path[strcspn (path, ",")] = '\0';
1.68 nicm 310: }
1.1 nicm 311: }
1.160 nicm 312: if (path == NULL && (path = make_label(label)) == NULL) {
313: fprintf(stderr, "can't create socket: %s\n", strerror(errno));
1.127 nicm 314: exit(1);
315: }
1.160 nicm 316: socket_path = path;
317: free(label);
1.1 nicm 318:
1.92 nicm 319: /* Pass control to the client. */
1.161 nicm 320: exit(client_main(event_init(), argc, argv, flags, shellcmd));
1.1 nicm 321: }
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