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Annotation of src/usr.bin/tmux/tmux.c, Revision 1.92

1.92    ! nicm        1: /* $OpenBSD: tmux.c,v 1.91 2010/10/16 08:42:35 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:
                     22: #include <errno.h>
1.55      nicm       23: #include <event.h>
1.91      nicm       24: #include <fcntl.h>
1.1       nicm       25: #include <paths.h>
                     26: #include <pwd.h>
                     27: #include <stdlib.h>
                     28: #include <string.h>
                     29: #include <unistd.h>
                     30:
                     31: #include "tmux.h"
                     32:
                     33: #ifdef DEBUG
1.54      nicm       34: extern char    *malloc_options;
1.1       nicm       35: #endif
                     36:
1.63      nicm       37: struct options  global_options;        /* server options */
1.12      nicm       38: struct options  global_s_options;      /* session options */
                     39: struct options  global_w_options;      /* window options */
1.29      nicm       40: struct environ  global_environ;
1.1       nicm       41:
1.78      nicm       42: struct event_base *ev_base;
                     43:
1.92    ! nicm       44: char           *cfg_file;
        !            45: char           *shell_cmd;
1.1       nicm       46: int             debug_level;
                     47: time_t          start_time;
1.92    ! nicm       48: char            socket_path[MAXPATHLEN];
1.41      nicm       49: int             login_shell;
1.92    ! nicm       50: char           *environ_path;
        !            51: pid_t           environ_pid;
        !            52: u_int           environ_idx;
1.70      nicm       53:
1.1       nicm       54: __dead void     usage(void);
1.92    ! nicm       55: void            parseenvironment(void);
        !            56: char           *makesocketpath(const char *);
1.55      nicm       57:
1.1       nicm       58: __dead void
                     59: usage(void)
                     60: {
1.4       sobrado    61:        fprintf(stderr,
1.52      nicm       62:            "usage: %s [-28lquv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41      nicm       63:            "            [-S socket-path] [command [flags]]\n",
1.1       nicm       64:            __progname);
                     65:        exit(1);
                     66: }
                     67:
                     68: void
                     69: logfile(const char *name)
                     70: {
                     71:        char    *path;
                     72:
                     73:        log_close();
                     74:        if (debug_level > 0) {
1.32      nicm       75:                xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
1.1       nicm       76:                log_open_file(debug_level, path);
                     77:                xfree(path);
                     78:        }
                     79: }
                     80:
1.39      nicm       81: const char *
                     82: getshell(void)
                     83: {
                     84:        struct passwd   *pw;
                     85:        const char      *shell;
                     86:
                     87:        shell = getenv("SHELL");
                     88:        if (checkshell(shell))
                     89:                return (shell);
                     90:
                     91:        pw = getpwuid(getuid());
                     92:        if (pw != NULL && checkshell(pw->pw_shell))
                     93:                return (pw->pw_shell);
                     94:
                     95:        return (_PATH_BSHELL);
                     96: }
                     97:
                     98: int
                     99: checkshell(const char *shell)
                    100: {
                    101:        if (shell == NULL || *shell == '\0' || areshell(shell))
                    102:                return (0);
                    103:        if (access(shell, X_OK) != 0)
                    104:                return (0);
                    105:        return (1);
                    106: }
                    107:
                    108: int
                    109: areshell(const char *shell)
                    110: {
                    111:        const char      *progname, *ptr;
                    112:
                    113:        if ((ptr = strrchr(shell, '/')) != NULL)
                    114:                ptr++;
                    115:        else
                    116:                ptr = shell;
                    117:        progname = __progname;
                    118:        if (*progname == '-')
                    119:                progname++;
                    120:        if (strcmp(ptr, progname) == 0)
                    121:                return (1);
                    122:        return (0);
                    123: }
                    124:
1.50      nicm      125: void
1.92    ! nicm      126: parseenvironment(void)
1.50      nicm      127: {
1.70      nicm      128:        char            *env, *path_pid, *pid_idx, buf[256];
1.50      nicm      129:        size_t           len;
                    130:        const char      *errstr;
                    131:        long long        ll;
                    132:
1.92    ! nicm      133:        environ_pid = -1;
1.50      nicm      134:        if ((env = getenv("TMUX")) == NULL)
                    135:                return;
                    136:
1.70      nicm      137:        if ((path_pid = strchr(env, ',')) == NULL || path_pid == env)
1.50      nicm      138:                return;
1.70      nicm      139:        if ((pid_idx = strchr(path_pid + 1, ',')) == NULL)
1.50      nicm      140:                return;
1.70      nicm      141:        if ((pid_idx == path_pid + 1 || pid_idx[1] == '\0'))
                    142:                return;
                    143:
                    144:        /* path */
                    145:        len = path_pid - env;
1.92    ! nicm      146:        environ_path = xmalloc(len + 1);
        !           147:        memcpy(environ_path, env, len);
        !           148:        environ_path[len] = '\0';
1.50      nicm      149:
1.70      nicm      150:        /* pid */
                    151:        len = pid_idx - path_pid - 1;
1.50      nicm      152:        if (len > (sizeof buf) - 1)
                    153:                return;
1.70      nicm      154:        memcpy(buf, path_pid + 1, len);
1.50      nicm      155:        buf[len] = '\0';
                    156:
                    157:        ll = strtonum(buf, 0, LONG_MAX, &errstr);
                    158:        if (errstr != NULL)
                    159:                return;
1.92    ! nicm      160:        environ_pid = ll;
1.50      nicm      161:
1.70      nicm      162:        /* idx */
1.92    ! nicm      163:        ll = strtonum(pid_idx + 1, 0, UINT_MAX, &errstr);
1.50      nicm      164:        if (errstr != NULL)
                    165:                return;
1.92    ! nicm      166:        environ_idx = ll;
1.50      nicm      167: }
                    168:
1.1       nicm      169: char *
1.92    ! nicm      170: makesocketpath(const char *label)
1.1       nicm      171: {
                    172:        char            base[MAXPATHLEN], *path;
                    173:        struct stat     sb;
                    174:        u_int           uid;
                    175:
                    176:        uid = getuid();
1.32      nicm      177:        xsnprintf(base, MAXPATHLEN, "%s/tmux-%d", _PATH_TMP, uid);
1.1       nicm      178:
                    179:        if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
                    180:                return (NULL);
                    181:
                    182:        if (lstat(base, &sb) != 0)
                    183:                return (NULL);
                    184:        if (!S_ISDIR(sb.st_mode)) {
                    185:                errno = ENOTDIR;
                    186:                return (NULL);
                    187:        }
                    188:        if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
                    189:                errno = EACCES;
                    190:                return (NULL);
                    191:        }
                    192:
                    193:        xasprintf(&path, "%s/%s", base, label);
                    194:        return (path);
                    195: }
                    196:
1.55      nicm      197: __dead void
                    198: shell_exec(const char *shell, const char *shellcmd)
                    199: {
                    200:        const char      *shellname, *ptr;
                    201:        char            *argv0;
1.91      nicm      202:        int              mode;
1.55      nicm      203:
                    204:        ptr = strrchr(shell, '/');
                    205:        if (ptr != NULL && *(ptr + 1) != '\0')
                    206:                shellname = ptr + 1;
                    207:        else
                    208:                shellname = shell;
                    209:        if (login_shell)
                    210:                xasprintf(&argv0, "-%s", shellname);
                    211:        else
                    212:                xasprintf(&argv0, "%s", shellname);
                    213:        setenv("SHELL", shell, 1);
1.90      nicm      214:
1.91      nicm      215:        if ((mode = fcntl(STDIN_FILENO, F_GETFL)) != -1)
                    216:                fcntl(STDIN_FILENO, F_SETFL, mode & ~O_NONBLOCK);
                    217:        if ((mode = fcntl(STDOUT_FILENO, F_GETFL)) != -1)
                    218:                fcntl(STDOUT_FILENO, F_SETFL, mode & ~O_NONBLOCK);
                    219:        if ((mode = fcntl(STDERR_FILENO, F_GETFL)) != -1)
                    220:                fcntl(STDERR_FILENO, F_SETFL, mode & ~O_NONBLOCK);
1.90      nicm      221:        closefrom(STDERR_FILENO + 1);
1.55      nicm      222:
                    223:        execl(shell, argv0, "-c", shellcmd, (char *) NULL);
                    224:        fatal("execl failed");
                    225: }
                    226:
1.1       nicm      227: int
                    228: main(int argc, char **argv)
                    229: {
1.92    ! nicm      230:        struct passwd   *pw;
        !           231:        struct options  *oo, *so, *wo;
        !           232:        struct keylist  *keylist;
        !           233:        char            *s, *path, *label, *home, **var;
        !           234:        int              opt, flags, quiet = 0;
1.54      nicm      235:
                    236: #ifdef DEBUG
                    237:        malloc_options = (char *) "AFGJPX";
                    238: #endif
1.1       nicm      239:
1.45      nicm      240:        flags = 0;
1.92    ! nicm      241:        label = path = NULL;
1.41      nicm      242:        login_shell = (**argv == '-');
1.46      nicm      243:        while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUv")) != -1) {
1.41      nicm      244:                switch (opt) {
1.1       nicm      245:                case '2':
                    246:                        flags |= IDENTIFY_256COLOURS;
                    247:                        flags &= ~IDENTIFY_88COLOURS;
                    248:                        break;
                    249:                case '8':
                    250:                        flags |= IDENTIFY_88COLOURS;
                    251:                        flags &= ~IDENTIFY_256COLOURS;
                    252:                        break;
1.46      nicm      253:                case 'c':
1.92    ! nicm      254:                        if (shell_cmd != NULL)
        !           255:                                xfree(shell_cmd);
        !           256:                        shell_cmd = xstrdup(optarg);
1.37      nicm      257:                        break;
1.1       nicm      258:                case 'f':
1.42      nicm      259:                        if (cfg_file != NULL)
1.2       ray       260:                                xfree(cfg_file);
1.1       nicm      261:                        cfg_file = xstrdup(optarg);
1.41      nicm      262:                        break;
                    263:                case 'l':
                    264:                        login_shell = 1;
1.1       nicm      265:                        break;
                    266:                case 'L':
                    267:                        if (label != NULL)
                    268:                                xfree(label);
                    269:                        label = xstrdup(optarg);
                    270:                        break;
1.37      nicm      271:                case 'q':
1.63      nicm      272:                        quiet = 1;
1.37      nicm      273:                        break;
1.1       nicm      274:                case 'S':
                    275:                        if (path != NULL)
                    276:                                xfree(path);
                    277:                        path = xstrdup(optarg);
                    278:                        break;
                    279:                case 'u':
                    280:                        flags |= IDENTIFY_UTF8;
                    281:                        break;
                    282:                case 'v':
                    283:                        debug_level++;
                    284:                        break;
1.53      deraadt   285:                default:
1.1       nicm      286:                        usage();
1.53      deraadt   287:                }
                    288:        }
1.1       nicm      289:        argc -= optind;
                    290:        argv += optind;
                    291:
1.92    ! nicm      292:        if (shell_cmd != NULL && argc != 0)
1.46      nicm      293:                usage();
                    294:
1.1       nicm      295:        log_open_tty(debug_level);
                    296:
1.15      nicm      297:        if (!(flags & IDENTIFY_UTF8)) {
                    298:                /*
                    299:                 * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
                    300:                 * exist (in that order) to contain UTF-8, it is a safe
                    301:                 * assumption that either they are using a UTF-8 terminal, or
                    302:                 * if not they know that output from UTF-8-capable programs may
                    303:                 * be wrong.
                    304:                 */
                    305:                if ((s = getenv("LC_ALL")) == NULL) {
                    306:                        if ((s = getenv("LC_CTYPE")) == NULL)
                    307:                                s = getenv("LANG");
                    308:                }
1.26      nicm      309:                if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
                    310:                    strcasestr(s, "UTF8") != NULL))
1.15      nicm      311:                        flags |= IDENTIFY_UTF8;
                    312:        }
                    313:
1.42      nicm      314:        environ_init(&global_environ);
1.62      nicm      315:        for (var = environ; *var != NULL; var++)
1.42      nicm      316:                environ_put(&global_environ, *var);
1.63      nicm      317:
                    318:        options_init(&global_options, NULL);
                    319:        oo = &global_options;
1.64      nicm      320:        options_set_number(oo, "quiet", quiet);
1.65      nicm      321:        options_set_number(oo, "escape-time", 500);
1.88      nicm      322:        options_set_number(oo, "exit-unattached", 0);
1.42      nicm      323:
1.12      nicm      324:        options_init(&global_s_options, NULL);
1.42      nicm      325:        so = &global_s_options;
                    326:        options_set_number(so, "base-index", 0);
                    327:        options_set_number(so, "bell-action", BELL_ANY);
                    328:        options_set_number(so, "buffer-limit", 9);
                    329:        options_set_string(so, "default-command", "%s", "");
1.82      nicm      330:        options_set_string(so, "default-path", "%s", "");
1.42      nicm      331:        options_set_string(so, "default-shell", "%s", getshell());
                    332:        options_set_string(so, "default-terminal", "screen");
1.88      nicm      333:        options_set_number(so, "destroy-unattached", 0);
1.81      nicm      334:        options_set_number(so, "detach-on-destroy", 1);
                    335:        options_set_number(so, "display-panes-active-colour", 1);
1.42      nicm      336:        options_set_number(so, "display-panes-colour", 4);
                    337:        options_set_number(so, "display-panes-time", 1000);
                    338:        options_set_number(so, "display-time", 750);
                    339:        options_set_number(so, "history-limit", 2000);
                    340:        options_set_number(so, "lock-after-time", 0);
1.45      nicm      341:        options_set_string(so, "lock-command", "lock -np");
1.48      nicm      342:        options_set_number(so, "lock-server", 1);
1.42      nicm      343:        options_set_number(so, "message-attr", 0);
                    344:        options_set_number(so, "message-bg", 3);
                    345:        options_set_number(so, "message-fg", 0);
1.58      nicm      346:        options_set_number(so, "message-limit", 20);
1.49      nicm      347:        options_set_number(so, "mouse-select-pane", 0);
1.75      nicm      348:        options_set_number(so, "pane-active-border-bg", 8);
                    349:        options_set_number(so, "pane-active-border-fg", 2);
1.66      nicm      350:        options_set_number(so, "pane-border-bg", 8);
                    351:        options_set_number(so, "pane-border-fg", 8);
1.42      nicm      352:        options_set_number(so, "repeat-time", 500);
                    353:        options_set_number(so, "set-remain-on-exit", 0);
                    354:        options_set_number(so, "set-titles", 0);
1.43      nicm      355:        options_set_string(so, "set-titles-string", "#S:#I:#W - \"#T\"");
1.42      nicm      356:        options_set_number(so, "status", 1);
                    357:        options_set_number(so, "status-attr", 0);
                    358:        options_set_number(so, "status-bg", 2);
                    359:        options_set_number(so, "status-fg", 0);
                    360:        options_set_number(so, "status-interval", 15);
                    361:        options_set_number(so, "status-justify", 0);
                    362:        options_set_number(so, "status-keys", MODEKEY_EMACS);
                    363:        options_set_string(so, "status-left", "[#S]");
                    364:        options_set_number(so, "status-left-attr", 0);
                    365:        options_set_number(so, "status-left-bg", 8);
                    366:        options_set_number(so, "status-left-fg", 8);
                    367:        options_set_number(so, "status-left-length", 10);
                    368:        options_set_string(so, "status-right", "\"#22T\" %%H:%%M %%d-%%b-%%y");
                    369:        options_set_number(so, "status-right-attr", 0);
                    370:        options_set_number(so, "status-right-bg", 8);
                    371:        options_set_number(so, "status-right-fg", 8);
                    372:        options_set_number(so, "status-right-length", 40);
                    373:        options_set_string(so, "terminal-overrides",
                    374:            "*88col*:colors=88,*256col*:colors=256");
                    375:        options_set_string(so, "update-environment", "DISPLAY "
1.35      nicm      376:            "WINDOWID SSH_ASKPASS SSH_AUTH_SOCK SSH_AGENT_PID SSH_CONNECTION");
1.42      nicm      377:        options_set_number(so, "visual-activity", 0);
                    378:        options_set_number(so, "visual-bell", 0);
                    379:        options_set_number(so, "visual-content", 0);
1.44      nicm      380:
                    381:        keylist = xmalloc(sizeof *keylist);
                    382:        ARRAY_INIT(keylist);
                    383:        ARRAY_ADD(keylist, '\002');
                    384:        options_set_data(so, "prefix", keylist, xfree);
1.1       nicm      385:
1.12      nicm      386:        options_init(&global_w_options, NULL);
1.42      nicm      387:        wo = &global_w_options;
                    388:        options_set_number(wo, "aggressive-resize", 0);
1.72      nicm      389:        options_set_number(wo, "alternate-screen", 1);
1.42      nicm      390:        options_set_number(wo, "automatic-rename", 1);
                    391:        options_set_number(wo, "clock-mode-colour", 4);
                    392:        options_set_number(wo, "clock-mode-style", 1);
                    393:        options_set_number(wo, "force-height", 0);
                    394:        options_set_number(wo, "force-width", 0);
                    395:        options_set_number(wo, "main-pane-height", 24);
                    396:        options_set_number(wo, "main-pane-width", 81);
                    397:        options_set_number(wo, "mode-attr", 0);
                    398:        options_set_number(wo, "mode-bg", 3);
                    399:        options_set_number(wo, "mode-fg", 0);
                    400:        options_set_number(wo, "mode-keys", MODEKEY_EMACS);
                    401:        options_set_number(wo, "mode-mouse", 0);
                    402:        options_set_number(wo, "monitor-activity", 0);
                    403:        options_set_string(wo, "monitor-content", "%s", "");
                    404:        options_set_number(wo, "window-status-attr", 0);
                    405:        options_set_number(wo, "window-status-bg", 8);
                    406:        options_set_number(wo, "window-status-current-attr", 0);
                    407:        options_set_number(wo, "window-status-current-bg", 8);
                    408:        options_set_number(wo, "window-status-current-fg", 8);
                    409:        options_set_number(wo, "window-status-fg", 8);
1.79      nicm      410:        options_set_number(wo, "window-status-alert-attr", GRID_ATTR_REVERSE);
                    411:        options_set_number(wo, "window-status-alert-bg", 8);
                    412:        options_set_number(wo, "window-status-alert-fg", 8);
1.60      nicm      413:        options_set_string(wo, "window-status-format", "#I:#W#F");
                    414:        options_set_string(wo, "window-status-current-format", "#I:#W#F");
1.73      nicm      415:        options_set_string(wo, "word-separators", " -_@");
1.59      nicm      416:        options_set_number(wo, "xterm-keys", 0);
1.62      nicm      417:        options_set_number(wo, "remain-on-exit", 0);
1.47      nicm      418:        options_set_number(wo, "synchronize-panes", 0);
1.42      nicm      419:
1.62      nicm      420:        if (flags & IDENTIFY_UTF8) {
1.42      nicm      421:                options_set_number(so, "status-utf8", 1);
                    422:                options_set_number(wo, "utf8", 1);
                    423:        } else {
                    424:                options_set_number(so, "status-utf8", 0);
                    425:                options_set_number(wo, "utf8", 0);
                    426:        }
1.1       nicm      427:
1.92    ! nicm      428:        /* Locate the configuration file. */
1.1       nicm      429:        if (cfg_file == NULL) {
                    430:                home = getenv("HOME");
                    431:                if (home == NULL || *home == '\0') {
                    432:                        pw = getpwuid(getuid());
                    433:                        if (pw != NULL)
                    434:                                home = pw->pw_dir;
                    435:                }
                    436:                xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
1.69      nicm      437:                if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
1.1       nicm      438:                        xfree(cfg_file);
                    439:                        cfg_file = NULL;
                    440:                }
                    441:        }
1.62      nicm      442:
1.68      nicm      443:        /*
1.92    ! nicm      444:         * Figure out the socket path. If specified on the command-line with -S
        !           445:         * or -L, use it, otherwise try $TMUX or assume -L default.
1.68      nicm      446:         */
1.92    ! nicm      447:        parseenvironment();
1.68      nicm      448:        if (path == NULL) {
1.92    ! nicm      449:                /* If no -L, use the environment. */
1.68      nicm      450:                if (label == NULL) {
1.92    ! nicm      451:                        if (environ_path != NULL)
        !           452:                                path = xstrdup(environ_path);
        !           453:                        else
1.68      nicm      454:                                label = xstrdup("default");
                    455:                }
                    456:
                    457:                /* -L or default set. */
                    458:                if (label != NULL) {
1.92    ! nicm      459:                        if ((path = makesocketpath(label)) == NULL) {
1.68      nicm      460:                                log_warn("can't create socket");
                    461:                                exit(1);
                    462:                        }
                    463:                }
1.1       nicm      464:        }
1.68      nicm      465:        if (label != NULL)
                    466:                xfree(label);
1.92    ! nicm      467:        if (realpath(path, socket_path) == NULL)
        !           468:                strlcpy(socket_path, path, sizeof socket_path);
        !           469:        xfree(path);
1.1       nicm      470:
1.92    ! nicm      471:        /* Set process title. */
        !           472:        setproctitle("%s (%s)", __progname, socket_path);
1.1       nicm      473:
1.92    ! nicm      474:        /* Pass control to the client. */
1.78      nicm      475:        ev_base = event_init();
1.92    ! nicm      476:        exit(client_main(argc, argv, flags));
1.1       nicm      477: }