Annotation of src/usr.bin/tmux/tmux.c, Revision 1.160
1.160 ! nicm 1: /* $OpenBSD: tmux.c,v 1.159 2015/11/24 22:09:53 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;
1.160 ! 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: {
1.152 nicm 187: char *path, *label, **var, tmp[PATH_MAX];
188: const char *s;
189: int opt, flags, keys;
1.119 nicm 190:
191: setlocale(LC_TIME, "");
1.144 nicm 192: tzset();
1.1 nicm 193:
1.140 nicm 194: if (**argv == '-')
195: flags = CLIENT_LOGIN;
196: else
197: flags = 0;
198:
1.92 nicm 199: label = path = NULL;
1.117 nicm 200: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
1.41 nicm 201: switch (opt) {
1.1 nicm 202: case '2':
1.124 nicm 203: flags |= CLIENT_256COLOURS;
1.1 nicm 204: break;
1.46 nicm 205: case 'c':
1.112 nicm 206: free(shell_cmd);
1.92 nicm 207: shell_cmd = xstrdup(optarg);
1.111 nicm 208: break;
209: case 'C':
1.124 nicm 210: if (flags & CLIENT_CONTROL)
211: flags |= CLIENT_CONTROLCONTROL;
1.111 nicm 212: else
1.124 nicm 213: flags |= CLIENT_CONTROL;
1.37 nicm 214: break;
1.1 nicm 215: case 'f':
1.142 nicm 216: set_cfg_file(optarg);
1.41 nicm 217: break;
218: case 'l':
1.140 nicm 219: flags |= CLIENT_LOGIN;
1.1 nicm 220: break;
221: case 'L':
1.112 nicm 222: free(label);
1.1 nicm 223: label = xstrdup(optarg);
224: break;
1.37 nicm 225: case 'q':
226: break;
1.1 nicm 227: case 'S':
1.112 nicm 228: free(path);
1.1 nicm 229: path = xstrdup(optarg);
230: break;
231: case 'u':
1.124 nicm 232: flags |= CLIENT_UTF8;
1.1 nicm 233: break;
234: case 'v':
1.157 nicm 235: log_add_level();
1.1 nicm 236: break;
1.53 deraadt 237: default:
1.1 nicm 238: usage();
1.53 deraadt 239: }
240: }
1.1 nicm 241: argc -= optind;
242: argv += optind;
243:
1.92 nicm 244: if (shell_cmd != NULL && argc != 0)
1.46 nicm 245: usage();
1.145 nicm 246:
1.156 nicm 247: if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
248: "recvfd proc exec tty ps", NULL) != 0)
1.145 nicm 249: err(1, "pledge");
1.46 nicm 250:
1.152 nicm 251: /*
252: * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
253: * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
254: * UTF-8, it is a safe assumption that either they are using a UTF-8
255: * terminal, or if not they know that output from UTF-8-capable
256: * programs may be wrong.
257: */
258: if (getenv("TMUX") != NULL)
259: flags |= CLIENT_UTF8;
260: else {
261: s = getenv("LC_ALL");
262: if (s == NULL || *s == '\0')
263: s = getenv("LC_CTYPE");
264: if (s == NULL || *s == '\0')
265: s = getenv("LANG");
266: if (s == NULL || *s == '\0')
267: s = "";
268: if (strcasestr(s, "UTF-8") != NULL ||
269: strcasestr(s, "UTF8") != NULL)
1.124 nicm 270: flags |= CLIENT_UTF8;
1.15 nicm 271: }
272:
1.149 nicm 273: global_environ = environ_create();
1.62 nicm 274: for (var = environ; *var != NULL; var++)
1.149 nicm 275: environ_put(global_environ, *var);
1.125 nicm 276: if (getcwd(tmp, sizeof tmp) != NULL)
1.149 nicm 277: environ_set(global_environ, "PWD", tmp);
1.63 nicm 278:
1.148 nicm 279: global_options = options_create(NULL);
1.155 nicm 280: options_table_populate_tree(OPTIONS_TABLE_SERVER, global_options);
1.42 nicm 281:
1.148 nicm 282: global_s_options = options_create(NULL);
1.155 nicm 283: options_table_populate_tree(OPTIONS_TABLE_SESSION, global_s_options);
1.148 nicm 284: options_set_string(global_s_options, "default-shell", "%s", getshell());
1.44 nicm 285:
1.148 nicm 286: global_w_options = options_create(NULL);
1.155 nicm 287: options_table_populate_tree(OPTIONS_TABLE_WINDOW, global_w_options);
1.94 nicm 288:
1.99 nicm 289: /* Override keys to vi if VISUAL or EDITOR are set. */
1.94 nicm 290: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
291: if (strrchr(s, '/') != NULL)
292: s = strrchr(s, '/') + 1;
293: if (strstr(s, "vi") != NULL)
294: keys = MODEKEY_VI;
1.99 nicm 295: else
296: keys = MODEKEY_EMACS;
1.148 nicm 297: options_set_number(global_s_options, "status-keys", keys);
298: options_set_number(global_w_options, "mode-keys", keys);
1.1 nicm 299: }
1.62 nicm 300:
1.68 nicm 301: /*
1.160 ! nicm 302: * If socket is specified on the command-line with -S or -L, it is
! 303: * used. Otherwise, $TMUX is checked and if that fails "default" is
! 304: * used.
1.68 nicm 305: */
1.160 ! nicm 306: if (path == NULL && label == NULL) {
! 307: s = getenv("TMUX");
! 308: if (s != NULL && *s != '\0' && *s != ',') {
! 309: path = xstrdup(s);
! 310: path[strcspn (path, ",")] = '\0';
1.68 nicm 311: }
1.1 nicm 312: }
1.160 ! nicm 313: if (path == NULL && (path = make_label(label)) == NULL) {
! 314: fprintf(stderr, "can't create socket: %s\n", strerror(errno));
1.127 nicm 315: exit(1);
316: }
1.160 ! nicm 317: socket_path = path;
! 318: free(label);
1.1 nicm 319:
1.92 nicm 320: /* Pass control to the client. */
1.139 nicm 321: exit(client_main(event_init(), argc, argv, flags));
1.1 nicm 322: }
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