Annotation of src/usr.bin/tmux/tmux.c, Revision 1.173
1.173 ! nicm 1: /* $OpenBSD: tmux.c,v 1.172 2016/10/11 13:21:59 nicm Exp $ */
1.1 nicm 2:
3: /*
1.164 nicm 4: * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 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>
1.168 nicm 27: #include <langinfo.h>
1.119 nicm 28: #include <locale.h>
1.1 nicm 29: #include <paths.h>
30: #include <pwd.h>
31: #include <stdlib.h>
32: #include <string.h>
1.147 nicm 33: #include <time.h>
1.1 nicm 34: #include <unistd.h>
35:
36: #include "tmux.h"
37:
1.148 nicm 38: struct options *global_options; /* server options */
39: struct options *global_s_options; /* session options */
40: struct options *global_w_options; /* window options */
1.149 nicm 41: struct environ *global_environ;
1.163 nicm 42: struct hooks *global_hooks;
1.1 nicm 43:
1.158 nicm 44: struct timeval start_time;
1.160 nicm 45: const char *socket_path;
1.70 nicm 46:
1.171 nicm 47: static __dead void usage(void);
48: static char *make_label(const char *);
1.55 nicm 49:
1.172 nicm 50: static const char *getshell(void);
51: static int checkshell(const char *);
52:
1.171 nicm 53: static __dead void
1.1 nicm 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",
1.170 nicm 59: getprogname());
1.1 nicm 60: exit(1);
61: }
62:
1.172 nicm 63: static const char *
1.39 nicm 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:
1.172 nicm 80: static int
1.39 nicm 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;
1.170 nicm 101: progname = getprogname();
1.39 nicm 102: if (*progname == '-')
103: progname++;
104: if (strcmp(ptr, progname) == 0)
105: return (1);
106: return (0);
1.107 nicm 107: }
108:
1.160 nicm 109: static char *
110: make_label(const char *label)
1.1 nicm 111: {
1.160 nicm 112: char *base, resolved[PATH_MAX], *path, *s;
113: struct stat sb;
114: u_int uid;
115: int saved_errno;
116:
117: if (label == NULL)
118: label = "default";
1.1 nicm 119:
120: uid = getuid();
1.160 nicm 121:
1.118 nicm 122: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
1.160 nicm 123: xasprintf(&base, "%s/tmux-%u", s, uid);
1.118 nicm 124: else
1.160 nicm 125: xasprintf(&base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 126:
127: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
1.160 nicm 128: goto fail;
1.1 nicm 129:
130: if (lstat(base, &sb) != 0)
1.160 nicm 131: goto fail;
1.1 nicm 132: if (!S_ISDIR(sb.st_mode)) {
133: errno = ENOTDIR;
1.160 nicm 134: goto fail;
1.1 nicm 135: }
1.134 nicm 136: if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
1.1 nicm 137: errno = EACCES;
1.160 nicm 138: goto fail;
1.1 nicm 139: }
140:
1.160 nicm 141: if (realpath(base, resolved) == NULL)
142: strlcpy(resolved, base, sizeof resolved);
143: xasprintf(&path, "%s/%s", resolved, label);
144: return (path);
1.113 nicm 145:
1.160 nicm 146: fail:
147: saved_errno = errno;
148: free(base);
149: errno = saved_errno;
150: return (NULL);
1.1 nicm 151: }
152:
1.101 nicm 153: void
154: setblocking(int fd, int state)
155: {
156: int mode;
157:
158: if ((mode = fcntl(fd, F_GETFL)) != -1) {
159: if (!state)
160: mode |= O_NONBLOCK;
161: else
162: mode &= ~O_NONBLOCK;
163: fcntl(fd, F_SETFL, mode);
164: }
165: }
166:
1.138 nicm 167: const char *
1.137 nicm 168: find_home(void)
169: {
1.142 nicm 170: struct passwd *pw;
171: static const char *home;
172:
173: if (home != NULL)
174: return (home);
1.137 nicm 175:
176: home = getenv("HOME");
177: if (home == NULL || *home == '\0') {
178: pw = getpwuid(getuid());
179: if (pw != NULL)
180: home = pw->pw_dir;
181: else
182: home = NULL;
183: }
184:
1.138 nicm 185: return (home);
1.137 nicm 186: }
187:
1.1 nicm 188: int
189: main(int argc, char **argv)
190: {
1.161 nicm 191: char *path, *label, **var, tmp[PATH_MAX], *shellcmd = NULL;
1.152 nicm 192: const char *s;
193: int opt, flags, keys;
1.165 nicm 194:
1.168 nicm 195: if (setlocale(LC_CTYPE, "en_US.UTF-8") == NULL) {
196: if (setlocale(LC_CTYPE, "") == NULL)
197: errx(1, "invalid LC_ALL, LC_CTYPE or LANG");
198: s = nl_langinfo(CODESET);
1.169 nicm 199: if (strcasecmp(s, "UTF-8") != 0 && strcasecmp(s, "UTF8") != 0)
1.168 nicm 200: errx(1, "need UTF-8 locale (LC_CTYPE) but have %s", s);
201: }
1.167 nicm 202:
1.119 nicm 203: setlocale(LC_TIME, "");
1.144 nicm 204: tzset();
1.1 nicm 205:
1.140 nicm 206: if (**argv == '-')
207: flags = CLIENT_LOGIN;
208: else
209: flags = 0;
210:
1.92 nicm 211: label = path = NULL;
1.117 nicm 212: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 213: switch (opt) {
1.1 nicm 214: case '2':
1.124 nicm 215: flags |= CLIENT_256COLOURS;
1.1 nicm 216: break;
1.46 nicm 217: case 'c':
1.161 nicm 218: free(shellcmd);
219: shellcmd = xstrdup(optarg);
1.111 nicm 220: break;
221: case 'C':
1.124 nicm 222: if (flags & CLIENT_CONTROL)
223: flags |= CLIENT_CONTROLCONTROL;
1.111 nicm 224: else
1.124 nicm 225: flags |= CLIENT_CONTROL;
1.37 nicm 226: break;
1.1 nicm 227: case 'f':
1.142 nicm 228: set_cfg_file(optarg);
1.41 nicm 229: break;
230: case 'l':
1.140 nicm 231: flags |= CLIENT_LOGIN;
1.1 nicm 232: break;
233: case 'L':
1.112 nicm 234: free(label);
1.1 nicm 235: label = xstrdup(optarg);
236: break;
1.37 nicm 237: case 'q':
238: break;
1.1 nicm 239: case 'S':
1.112 nicm 240: free(path);
1.1 nicm 241: path = xstrdup(optarg);
242: break;
243: case 'u':
1.124 nicm 244: flags |= CLIENT_UTF8;
1.1 nicm 245: break;
246: case 'v':
1.157 nicm 247: log_add_level();
1.1 nicm 248: break;
1.53 deraadt 249: default:
1.1 nicm 250: usage();
1.53 deraadt 251: }
252: }
1.1 nicm 253: argc -= optind;
254: argv += optind;
255:
1.161 nicm 256: if (shellcmd != NULL && argc != 0)
1.46 nicm 257: usage();
1.145 nicm 258:
1.156 nicm 259: if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
260: "recvfd proc exec tty ps", NULL) != 0)
1.145 nicm 261: err(1, "pledge");
1.46 nicm 262:
1.152 nicm 263: /*
264: * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
265: * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
266: * UTF-8, it is a safe assumption that either they are using a UTF-8
267: * terminal, or if not they know that output from UTF-8-capable
268: * programs may be wrong.
269: */
270: if (getenv("TMUX") != NULL)
271: flags |= CLIENT_UTF8;
272: else {
273: s = getenv("LC_ALL");
274: if (s == NULL || *s == '\0')
275: s = getenv("LC_CTYPE");
276: if (s == NULL || *s == '\0')
277: s = getenv("LANG");
278: if (s == NULL || *s == '\0')
279: s = "";
280: if (strcasestr(s, "UTF-8") != NULL ||
281: strcasestr(s, "UTF8") != NULL)
1.124 nicm 282: flags |= CLIENT_UTF8;
1.15 nicm 283: }
1.163 nicm 284:
285: global_hooks = hooks_create(NULL);
1.15 nicm 286:
1.149 nicm 287: global_environ = environ_create();
1.62 nicm 288: for (var = environ; *var != NULL; var++)
1.149 nicm 289: environ_put(global_environ, *var);
1.125 nicm 290: if (getcwd(tmp, sizeof tmp) != NULL)
1.162 nicm 291: environ_set(global_environ, "PWD", "%s", tmp);
1.63 nicm 292:
1.148 nicm 293: global_options = options_create(NULL);
1.155 nicm 294: options_table_populate_tree(OPTIONS_TABLE_SERVER, global_options);
1.42 nicm 295:
1.148 nicm 296: global_s_options = options_create(NULL);
1.155 nicm 297: options_table_populate_tree(OPTIONS_TABLE_SESSION, global_s_options);
1.148 nicm 298: options_set_string(global_s_options, "default-shell", "%s", getshell());
1.44 nicm 299:
1.148 nicm 300: global_w_options = options_create(NULL);
1.155 nicm 301: options_table_populate_tree(OPTIONS_TABLE_WINDOW, global_w_options);
1.94 nicm 302:
1.99 nicm 303: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 304: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
305: if (strrchr(s, '/') != NULL)
306: s = strrchr(s, '/') + 1;
307: if (strstr(s, "vi") != NULL)
308: keys = MODEKEY_VI;
1.99 nicm 309: else
310: keys = MODEKEY_EMACS;
1.148 nicm 311: options_set_number(global_s_options, "status-keys", keys);
312: options_set_number(global_w_options, "mode-keys", keys);
1.1 nicm 313: }
1.62 nicm 314:
1.68 nicm 315: /*
1.160 nicm 316: * If socket is specified on the command-line with -S or -L, it is
317: * used. Otherwise, $TMUX is checked and if that fails "default" is
318: * used.
1.68 nicm 319: */
1.160 nicm 320: if (path == NULL && label == NULL) {
321: s = getenv("TMUX");
322: if (s != NULL && *s != '\0' && *s != ',') {
323: path = xstrdup(s);
1.173 ! nicm 324: path[strcspn(path, ",")] = '\0';
1.68 nicm 325: }
1.1 nicm 326: }
1.160 nicm 327: if (path == NULL && (path = make_label(label)) == NULL) {
328: fprintf(stderr, "can't create socket: %s\n", strerror(errno));
1.127 nicm 329: exit(1);
330: }
1.160 nicm 331: socket_path = path;
332: free(label);
1.1 nicm 333:
1.92 nicm 334: /* Pass control to the client. */
1.161 nicm 335: exit(client_main(event_init(), argc, argv, flags, shellcmd));
1.1 nicm 336: }