Annotation of src/usr.bin/tmux/tmux.c, Revision 1.167
1.167 ! nicm 1: /* $OpenBSD: tmux.c,v 1.166 2016/03/01 12:02:54 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>
1.119 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;
1.163 nicm 41: struct hooks *global_hooks;
1.1 nicm 42:
1.158 nicm 43: struct timeval start_time;
1.160 nicm 44: const char *socket_path;
1.70 nicm 45:
1.1 nicm 46: __dead void usage(void);
1.160 nicm 47: static char *make_label(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:
1.160 nicm 105: static char *
106: make_label(const char *label)
1.1 nicm 107: {
1.160 nicm 108: char *base, resolved[PATH_MAX], *path, *s;
109: struct stat sb;
110: u_int uid;
111: int saved_errno;
112:
113: if (label == NULL)
114: label = "default";
1.1 nicm 115:
116: uid = getuid();
1.160 nicm 117:
1.118 nicm 118: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
1.160 nicm 119: xasprintf(&base, "%s/tmux-%u", s, uid);
1.118 nicm 120: else
1.160 nicm 121: xasprintf(&base, "%s/tmux-%u", _PATH_TMP, uid);
1.1 nicm 122:
123: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
1.160 nicm 124: goto fail;
1.1 nicm 125:
126: if (lstat(base, &sb) != 0)
1.160 nicm 127: goto fail;
1.1 nicm 128: if (!S_ISDIR(sb.st_mode)) {
129: errno = ENOTDIR;
1.160 nicm 130: goto fail;
1.1 nicm 131: }
1.134 nicm 132: if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
1.1 nicm 133: errno = EACCES;
1.160 nicm 134: goto fail;
1.1 nicm 135: }
136:
1.160 nicm 137: if (realpath(base, resolved) == NULL)
138: strlcpy(resolved, base, sizeof resolved);
139: xasprintf(&path, "%s/%s", resolved, label);
140: return (path);
1.113 nicm 141:
1.160 nicm 142: fail:
143: saved_errno = errno;
144: free(base);
145: errno = saved_errno;
146: return (NULL);
1.1 nicm 147: }
148:
1.101 nicm 149: void
150: setblocking(int fd, int state)
151: {
152: int mode;
153:
154: if ((mode = fcntl(fd, F_GETFL)) != -1) {
155: if (!state)
156: mode |= O_NONBLOCK;
157: else
158: mode &= ~O_NONBLOCK;
159: fcntl(fd, F_SETFL, mode);
160: }
161: }
162:
1.138 nicm 163: const char *
1.137 nicm 164: find_home(void)
165: {
1.142 nicm 166: struct passwd *pw;
167: static const char *home;
168:
169: if (home != NULL)
170: return (home);
1.137 nicm 171:
172: home = getenv("HOME");
173: if (home == NULL || *home == '\0') {
174: pw = getpwuid(getuid());
175: if (pw != NULL)
176: home = pw->pw_dir;
177: else
178: home = NULL;
179: }
180:
1.138 nicm 181: return (home);
1.137 nicm 182: }
183:
1.1 nicm 184: int
185: main(int argc, char **argv)
186: {
1.161 nicm 187: char *path, *label, **var, tmp[PATH_MAX], *shellcmd = NULL;
1.152 nicm 188: const char *s;
189: int opt, flags, keys;
1.165 nicm 190:
1.167 ! nicm 191: if (setlocale(LC_CTYPE, "en_US.UTF-8") == NULL)
! 192: setlocale(LC_CTYPE, "");
! 193: if (wcwidth(0xfffd) != 1)
! 194: errx(1, "no UTF-8 locale; please set LC_CTYPE");
! 195:
1.119 nicm 196: setlocale(LC_TIME, "");
1.144 nicm 197: tzset();
1.1 nicm 198:
1.140 nicm 199: if (**argv == '-')
200: flags = CLIENT_LOGIN;
201: else
202: flags = 0;
203:
1.92 nicm 204: label = path = NULL;
1.117 nicm 205: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 206: switch (opt) {
1.1 nicm 207: case '2':
1.124 nicm 208: flags |= CLIENT_256COLOURS;
1.1 nicm 209: break;
1.46 nicm 210: case 'c':
1.161 nicm 211: free(shellcmd);
212: shellcmd = xstrdup(optarg);
1.111 nicm 213: break;
214: case 'C':
1.124 nicm 215: if (flags & CLIENT_CONTROL)
216: flags |= CLIENT_CONTROLCONTROL;
1.111 nicm 217: else
1.124 nicm 218: flags |= CLIENT_CONTROL;
1.37 nicm 219: break;
1.1 nicm 220: case 'f':
1.142 nicm 221: set_cfg_file(optarg);
1.41 nicm 222: break;
223: case 'l':
1.140 nicm 224: flags |= CLIENT_LOGIN;
1.1 nicm 225: break;
226: case 'L':
1.112 nicm 227: free(label);
1.1 nicm 228: label = xstrdup(optarg);
229: break;
1.37 nicm 230: case 'q':
231: break;
1.1 nicm 232: case 'S':
1.112 nicm 233: free(path);
1.1 nicm 234: path = xstrdup(optarg);
235: break;
236: case 'u':
1.124 nicm 237: flags |= CLIENT_UTF8;
1.1 nicm 238: break;
239: case 'v':
1.157 nicm 240: log_add_level();
1.1 nicm 241: break;
1.53 deraadt 242: default:
1.1 nicm 243: usage();
1.53 deraadt 244: }
245: }
1.1 nicm 246: argc -= optind;
247: argv += optind;
248:
1.161 nicm 249: if (shellcmd != NULL && argc != 0)
1.46 nicm 250: usage();
1.145 nicm 251:
1.156 nicm 252: if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
253: "recvfd proc exec tty ps", NULL) != 0)
1.145 nicm 254: err(1, "pledge");
1.46 nicm 255:
1.152 nicm 256: /*
257: * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
258: * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
259: * UTF-8, it is a safe assumption that either they are using a UTF-8
260: * terminal, or if not they know that output from UTF-8-capable
261: * programs may be wrong.
262: */
263: if (getenv("TMUX") != NULL)
264: flags |= CLIENT_UTF8;
265: else {
266: s = getenv("LC_ALL");
267: if (s == NULL || *s == '\0')
268: s = getenv("LC_CTYPE");
269: if (s == NULL || *s == '\0')
270: s = getenv("LANG");
271: if (s == NULL || *s == '\0')
272: s = "";
273: if (strcasestr(s, "UTF-8") != NULL ||
274: strcasestr(s, "UTF8") != NULL)
1.124 nicm 275: flags |= CLIENT_UTF8;
1.15 nicm 276: }
1.163 nicm 277:
278: global_hooks = hooks_create(NULL);
1.15 nicm 279:
1.149 nicm 280: global_environ = environ_create();
1.62 nicm 281: for (var = environ; *var != NULL; var++)
1.149 nicm 282: environ_put(global_environ, *var);
1.125 nicm 283: if (getcwd(tmp, sizeof tmp) != NULL)
1.162 nicm 284: environ_set(global_environ, "PWD", "%s", tmp);
1.63 nicm 285:
1.148 nicm 286: global_options = options_create(NULL);
1.155 nicm 287: options_table_populate_tree(OPTIONS_TABLE_SERVER, global_options);
1.42 nicm 288:
1.148 nicm 289: global_s_options = options_create(NULL);
1.155 nicm 290: options_table_populate_tree(OPTIONS_TABLE_SESSION, global_s_options);
1.148 nicm 291: options_set_string(global_s_options, "default-shell", "%s", getshell());
1.44 nicm 292:
1.148 nicm 293: global_w_options = options_create(NULL);
1.155 nicm 294: options_table_populate_tree(OPTIONS_TABLE_WINDOW, global_w_options);
1.94 nicm 295:
1.99 nicm 296: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 297: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
298: if (strrchr(s, '/') != NULL)
299: s = strrchr(s, '/') + 1;
300: if (strstr(s, "vi") != NULL)
301: keys = MODEKEY_VI;
1.99 nicm 302: else
303: keys = MODEKEY_EMACS;
1.148 nicm 304: options_set_number(global_s_options, "status-keys", keys);
305: options_set_number(global_w_options, "mode-keys", keys);
1.1 nicm 306: }
1.62 nicm 307:
1.68 nicm 308: /*
1.160 nicm 309: * If socket is specified on the command-line with -S or -L, it is
310: * used. Otherwise, $TMUX is checked and if that fails "default" is
311: * used.
1.68 nicm 312: */
1.160 nicm 313: if (path == NULL && label == NULL) {
314: s = getenv("TMUX");
315: if (s != NULL && *s != '\0' && *s != ',') {
316: path = xstrdup(s);
317: path[strcspn (path, ",")] = '\0';
1.68 nicm 318: }
1.1 nicm 319: }
1.160 nicm 320: if (path == NULL && (path = make_label(label)) == NULL) {
321: fprintf(stderr, "can't create socket: %s\n", strerror(errno));
1.127 nicm 322: exit(1);
323: }
1.160 nicm 324: socket_path = path;
325: free(label);
1.1 nicm 326:
1.92 nicm 327: /* Pass control to the client. */
1.161 nicm 328: exit(client_main(event_init(), argc, argv, flags, shellcmd));
1.1 nicm 329: }
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