Annotation of embedaddon/tmux/tmux.c, revision 1.1
1.1 ! misho 1: /* $OpenBSD$ */
! 2:
! 3: /*
! 4: * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
! 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:
! 22: #include <errno.h>
! 23: #include <event.h>
! 24: #include <fcntl.h>
! 25: #include <getopt.h>
! 26: #include <langinfo.h>
! 27: #include <locale.h>
! 28: #include <pwd.h>
! 29: #include <stdlib.h>
! 30: #include <string.h>
! 31: #include <time.h>
! 32: #include <unistd.h>
! 33:
! 34: #include "tmux.h"
! 35:
! 36: struct options *global_options; /* server options */
! 37: struct options *global_s_options; /* session options */
! 38: struct options *global_w_options; /* window options */
! 39: struct environ *global_environ;
! 40: struct hooks *global_hooks;
! 41:
! 42: struct timeval start_time;
! 43: const char *socket_path;
! 44: int ptm_fd = -1;
! 45:
! 46: static __dead void usage(void);
! 47: static char *make_label(const char *);
! 48:
! 49: static const char *getshell(void);
! 50: static int checkshell(const char *);
! 51:
! 52: static __dead void
! 53: usage(void)
! 54: {
! 55: fprintf(stderr,
! 56: "usage: %s [-2CluvV] [-c shell-command] [-f file] [-L socket-name]\n"
! 57: " [-S socket-path] [command [flags]]\n",
! 58: getprogname());
! 59: exit(1);
! 60: }
! 61:
! 62: static const char *
! 63: getshell(void)
! 64: {
! 65: struct passwd *pw;
! 66: const char *shell;
! 67:
! 68: shell = getenv("SHELL");
! 69: if (checkshell(shell))
! 70: return (shell);
! 71:
! 72: pw = getpwuid(getuid());
! 73: if (pw != NULL && checkshell(pw->pw_shell))
! 74: return (pw->pw_shell);
! 75:
! 76: return (_PATH_BSHELL);
! 77: }
! 78:
! 79: static int
! 80: checkshell(const char *shell)
! 81: {
! 82: if (shell == NULL || *shell != '/')
! 83: return (0);
! 84: if (areshell(shell))
! 85: return (0);
! 86: if (access(shell, X_OK) != 0)
! 87: return (0);
! 88: return (1);
! 89: }
! 90:
! 91: int
! 92: areshell(const char *shell)
! 93: {
! 94: const char *progname, *ptr;
! 95:
! 96: if ((ptr = strrchr(shell, '/')) != NULL)
! 97: ptr++;
! 98: else
! 99: ptr = shell;
! 100: progname = getprogname();
! 101: if (*progname == '-')
! 102: progname++;
! 103: if (strcmp(ptr, progname) == 0)
! 104: return (1);
! 105: return (0);
! 106: }
! 107:
! 108: static char *
! 109: make_label(const char *label)
! 110: {
! 111: char *base, resolved[PATH_MAX], *path, *s;
! 112: struct stat sb;
! 113: uid_t uid;
! 114: int saved_errno;
! 115:
! 116: if (label == NULL)
! 117: label = "default";
! 118: uid = getuid();
! 119:
! 120: if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
! 121: xasprintf(&base, "%s/tmux-%u", s, uid);
! 122: else
! 123: xasprintf(&base, "%s/tmux-%ld", _PATH_TMP, (long)uid);
! 124:
! 125: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
! 126: goto fail;
! 127:
! 128: if (lstat(base, &sb) != 0)
! 129: goto fail;
! 130: if (!S_ISDIR(sb.st_mode)) {
! 131: errno = ENOTDIR;
! 132: goto fail;
! 133: }
! 134: if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
! 135: errno = EACCES;
! 136: goto fail;
! 137: }
! 138:
! 139: if (realpath(base, resolved) == NULL)
! 140: strlcpy(resolved, base, sizeof resolved);
! 141: xasprintf(&path, "%s/%s", resolved, label);
! 142:
! 143: free(base);
! 144: return (path);
! 145:
! 146: fail:
! 147: saved_errno = errno;
! 148: free(base);
! 149: errno = saved_errno;
! 150: return (NULL);
! 151: }
! 152:
! 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:
! 167: const char *
! 168: find_home(void)
! 169: {
! 170: struct passwd *pw;
! 171: static const char *home;
! 172:
! 173: if (home != NULL)
! 174: return (home);
! 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:
! 185: return (home);
! 186: }
! 187:
! 188: int
! 189: main(int argc, char **argv)
! 190: {
! 191: char *path, *label, tmp[PATH_MAX];
! 192: char *shellcmd = NULL, **var;
! 193: const char *s, *shell;
! 194: int opt, flags, keys;
! 195: const struct options_table_entry *oe;
! 196:
! 197: if (setlocale(LC_CTYPE, "en_US.UTF-8") == NULL) {
! 198: if (setlocale(LC_CTYPE, "") == NULL)
! 199: errx(1, "invalid LC_ALL, LC_CTYPE or LANG");
! 200: s = nl_langinfo(CODESET);
! 201: if (strcasecmp(s, "UTF-8") != 0 && strcasecmp(s, "UTF8") != 0)
! 202: errx(1, "need UTF-8 locale (LC_CTYPE) but have %s", s);
! 203: }
! 204:
! 205: setlocale(LC_TIME, "");
! 206: tzset();
! 207:
! 208: if (**argv == '-')
! 209: flags = CLIENT_LOGIN;
! 210: else
! 211: flags = 0;
! 212:
! 213: label = path = NULL;
! 214: while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUVv")) != -1) {
! 215: switch (opt) {
! 216: case '2':
! 217: flags |= CLIENT_256COLOURS;
! 218: break;
! 219: case 'c':
! 220: free(shellcmd);
! 221: shellcmd = xstrdup(optarg);
! 222: break;
! 223: case 'C':
! 224: if (flags & CLIENT_CONTROL)
! 225: flags |= CLIENT_CONTROLCONTROL;
! 226: else
! 227: flags |= CLIENT_CONTROL;
! 228: break;
! 229: case 'V':
! 230: printf("%s %s\n", getprogname(), VERSION);
! 231: exit(0);
! 232: case 'f':
! 233: set_cfg_file(optarg);
! 234: break;
! 235: case 'l':
! 236: flags |= CLIENT_LOGIN;
! 237: break;
! 238: case 'L':
! 239: free(label);
! 240: label = xstrdup(optarg);
! 241: break;
! 242: case 'q':
! 243: break;
! 244: case 'S':
! 245: free(path);
! 246: path = xstrdup(optarg);
! 247: break;
! 248: case 'u':
! 249: flags |= CLIENT_UTF8;
! 250: break;
! 251: case 'v':
! 252: log_add_level();
! 253: break;
! 254: default:
! 255: usage();
! 256: }
! 257: }
! 258: argc -= optind;
! 259: argv += optind;
! 260:
! 261: if (shellcmd != NULL && argc != 0)
! 262: usage();
! 263:
! 264: if (pty_open(&ptm_fd) != 0)
! 265: errx(1, "open(\"/dev/ptm\"");
! 266: if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
! 267: "recvfd proc exec tty ps", NULL) != 0)
! 268: err(1, "pledge");
! 269:
! 270: /*
! 271: * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
! 272: * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
! 273: * UTF-8, it is a safe assumption that either they are using a UTF-8
! 274: * terminal, or if not they know that output from UTF-8-capable
! 275: * programs may be wrong.
! 276: */
! 277: if (getenv("TMUX") != NULL)
! 278: flags |= CLIENT_UTF8;
! 279: else {
! 280: s = getenv("LC_ALL");
! 281: if (s == NULL || *s == '\0')
! 282: s = getenv("LC_CTYPE");
! 283: if (s == NULL || *s == '\0')
! 284: s = getenv("LANG");
! 285: if (s == NULL || *s == '\0')
! 286: s = "";
! 287: if (strcasestr(s, "UTF-8") != NULL ||
! 288: strcasestr(s, "UTF8") != NULL)
! 289: flags |= CLIENT_UTF8;
! 290: }
! 291:
! 292: global_hooks = hooks_create(NULL);
! 293:
! 294: global_environ = environ_create();
! 295: for (var = environ; *var != NULL; var++)
! 296: environ_put(global_environ, *var);
! 297: if (getcwd(tmp, sizeof tmp) != NULL)
! 298: environ_set(global_environ, "PWD", "%s", tmp);
! 299:
! 300: global_options = options_create(NULL);
! 301: global_s_options = options_create(NULL);
! 302: global_w_options = options_create(NULL);
! 303: for (oe = options_table; oe->name != NULL; oe++) {
! 304: if (oe->scope == OPTIONS_TABLE_SERVER)
! 305: options_default(global_options, oe);
! 306: if (oe->scope == OPTIONS_TABLE_SESSION)
! 307: options_default(global_s_options, oe);
! 308: if (oe->scope == OPTIONS_TABLE_WINDOW)
! 309: options_default(global_w_options, oe);
! 310: }
! 311:
! 312: /*
! 313: * The default shell comes from SHELL or from the user's passwd entry
! 314: * if available.
! 315: */
! 316: shell = getshell();
! 317: options_set_string(global_s_options, "default-shell", 0, "%s", shell);
! 318:
! 319: /* Override keys to vi if VISUAL or EDITOR are set. */
! 320: if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
! 321: if (strrchr(s, '/') != NULL)
! 322: s = strrchr(s, '/') + 1;
! 323: if (strstr(s, "vi") != NULL)
! 324: keys = MODEKEY_VI;
! 325: else
! 326: keys = MODEKEY_EMACS;
! 327: options_set_number(global_s_options, "status-keys", keys);
! 328: options_set_number(global_w_options, "mode-keys", keys);
! 329: }
! 330:
! 331: /*
! 332: * If socket is specified on the command-line with -S or -L, it is
! 333: * used. Otherwise, $TMUX is checked and if that fails "default" is
! 334: * used.
! 335: */
! 336: if (path == NULL && label == NULL) {
! 337: s = getenv("TMUX");
! 338: if (s != NULL && *s != '\0' && *s != ',') {
! 339: path = xstrdup(s);
! 340: path[strcspn(path, ",")] = '\0';
! 341: }
! 342: }
! 343: if (path == NULL && (path = make_label(label)) == NULL) {
! 344: fprintf(stderr, "can't create socket: %s\n", strerror(errno));
! 345: exit(1);
! 346: }
! 347: socket_path = path;
! 348: free(label);
! 349:
! 350: /* Pass control to the client. */
! 351: exit(client_main(osdep_event_init(), argc, argv, flags, shellcmd));
! 352: }
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