Annotation of src/usr.bin/tmux/tmux.c, Revision 1.91
1.91 ! nicm 1: /* $OpenBSD: tmux.c,v 1.90 2010/10/16 08:31:55 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>
1.78 nicm 21: #include <sys/wait.h>
1.1 nicm 22:
23: #include <errno.h>
1.55 nicm 24: #include <event.h>
1.91 ! nicm 25: #include <fcntl.h>
1.1 nicm 26: #include <paths.h>
27: #include <pwd.h>
28: #include <signal.h>
29: #include <stdlib.h>
30: #include <string.h>
31: #include <syslog.h>
32: #include <unistd.h>
33:
34: #include "tmux.h"
35:
36: #ifdef DEBUG
1.54 nicm 37: extern char *malloc_options;
1.1 nicm 38: #endif
39:
40: char *cfg_file;
1.63 nicm 41: struct options global_options; /* server options */
1.12 nicm 42: struct options global_s_options; /* session options */
43: struct options global_w_options; /* window options */
1.29 nicm 44: struct environ global_environ;
1.1 nicm 45:
1.78 nicm 46: struct event_base *ev_base;
47:
1.1 nicm 48: int debug_level;
49: time_t start_time;
50: char *socket_path;
1.41 nicm 51: int login_shell;
1.1 nicm 52:
1.70 nicm 53: struct env_data {
54: char *path;
55: pid_t pid;
56: u_int idx;
57: };
58:
1.1 nicm 59: __dead void usage(void);
1.70 nicm 60: void parse_env(struct env_data *);
1.1 nicm 61: char *makesockpath(const char *);
1.46 nicm 62: __dead void shell_exec(const char *, const char *);
1.1 nicm 63:
1.55 nicm 64: struct imsgbuf *main_ibuf;
1.89 nicm 65: struct event main_event;
1.55 nicm 66:
67: void main_signal(int, short, unused void *);
68: void main_callback(int, short, void *);
69: void main_dispatch(const char *);
70:
1.1 nicm 71: __dead void
72: usage(void)
73: {
1.4 sobrado 74: fprintf(stderr,
1.52 nicm 75: "usage: %s [-28lquv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 76: " [-S socket-path] [command [flags]]\n",
1.1 nicm 77: __progname);
78: exit(1);
79: }
80:
81: void
82: logfile(const char *name)
83: {
84: char *path;
85:
86: log_close();
87: if (debug_level > 0) {
1.32 nicm 88: xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
1.1 nicm 89: log_open_file(debug_level, path);
90: xfree(path);
91: }
92: }
93:
1.39 nicm 94: const char *
95: getshell(void)
96: {
97: struct passwd *pw;
98: const char *shell;
99:
100: shell = getenv("SHELL");
101: if (checkshell(shell))
102: return (shell);
103:
104: pw = getpwuid(getuid());
105: if (pw != NULL && checkshell(pw->pw_shell))
106: return (pw->pw_shell);
107:
108: return (_PATH_BSHELL);
109: }
110:
111: int
112: checkshell(const char *shell)
113: {
114: if (shell == NULL || *shell == '\0' || areshell(shell))
115: return (0);
116: if (access(shell, X_OK) != 0)
117: return (0);
118: return (1);
119: }
120:
121: int
122: areshell(const char *shell)
123: {
124: const char *progname, *ptr;
125:
126: if ((ptr = strrchr(shell, '/')) != NULL)
127: ptr++;
128: else
129: ptr = shell;
130: progname = __progname;
131: if (*progname == '-')
132: progname++;
133: if (strcmp(ptr, progname) == 0)
134: return (1);
135: return (0);
136: }
137:
1.50 nicm 138: void
1.70 nicm 139: parse_env(struct env_data *data)
1.50 nicm 140: {
1.70 nicm 141: char *env, *path_pid, *pid_idx, buf[256];
1.50 nicm 142: size_t len;
143: const char *errstr;
144: long long ll;
145:
146: data->pid = -1;
147: if ((env = getenv("TMUX")) == NULL)
148: return;
149:
1.70 nicm 150: if ((path_pid = strchr(env, ',')) == NULL || path_pid == env)
1.50 nicm 151: return;
1.70 nicm 152: if ((pid_idx = strchr(path_pid + 1, ',')) == NULL)
1.50 nicm 153: return;
1.70 nicm 154: if ((pid_idx == path_pid + 1 || pid_idx[1] == '\0'))
155: return;
156:
157: /* path */
158: len = path_pid - env;
159: data->path = xmalloc (len + 1);
160: memcpy(data->path, env, len);
161: data->path[len] = '\0';
1.50 nicm 162:
1.70 nicm 163: /* pid */
164: len = pid_idx - path_pid - 1;
1.50 nicm 165: if (len > (sizeof buf) - 1)
166: return;
1.70 nicm 167: memcpy(buf, path_pid + 1, len);
1.50 nicm 168: buf[len] = '\0';
169:
170: ll = strtonum(buf, 0, LONG_MAX, &errstr);
171: if (errstr != NULL)
172: return;
173: data->pid = ll;
174:
1.70 nicm 175: /* idx */
176: ll = strtonum(pid_idx+1, 0, UINT_MAX, &errstr);
1.50 nicm 177: if (errstr != NULL)
178: return;
179: data->idx = ll;
180: }
181:
1.1 nicm 182: char *
183: makesockpath(const char *label)
184: {
185: char base[MAXPATHLEN], *path;
186: struct stat sb;
187: u_int uid;
188:
189: uid = getuid();
1.32 nicm 190: xsnprintf(base, MAXPATHLEN, "%s/tmux-%d", _PATH_TMP, uid);
1.1 nicm 191:
192: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
193: return (NULL);
194:
195: if (lstat(base, &sb) != 0)
196: return (NULL);
197: if (!S_ISDIR(sb.st_mode)) {
198: errno = ENOTDIR;
199: return (NULL);
200: }
201: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
202: errno = EACCES;
203: return (NULL);
204: }
205:
206: xasprintf(&path, "%s/%s", base, label);
207: return (path);
208: }
209:
1.55 nicm 210: __dead void
211: shell_exec(const char *shell, const char *shellcmd)
212: {
213: const char *shellname, *ptr;
214: char *argv0;
1.91 ! nicm 215: int mode;
1.55 nicm 216:
217: ptr = strrchr(shell, '/');
218: if (ptr != NULL && *(ptr + 1) != '\0')
219: shellname = ptr + 1;
220: else
221: shellname = shell;
222: if (login_shell)
223: xasprintf(&argv0, "-%s", shellname);
224: else
225: xasprintf(&argv0, "%s", shellname);
226: setenv("SHELL", shell, 1);
1.90 nicm 227:
1.91 ! nicm 228: if ((mode = fcntl(STDIN_FILENO, F_GETFL)) != -1)
! 229: fcntl(STDIN_FILENO, F_SETFL, mode & ~O_NONBLOCK);
! 230: if ((mode = fcntl(STDOUT_FILENO, F_GETFL)) != -1)
! 231: fcntl(STDOUT_FILENO, F_SETFL, mode & ~O_NONBLOCK);
! 232: if ((mode = fcntl(STDERR_FILENO, F_GETFL)) != -1)
! 233: fcntl(STDERR_FILENO, F_SETFL, mode & ~O_NONBLOCK);
1.90 nicm 234: closefrom(STDERR_FILENO + 1);
1.55 nicm 235:
236: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
237: fatal("execl failed");
238: }
239:
1.1 nicm 240: int
241: main(int argc, char **argv)
242: {
1.51 nicm 243: struct cmd_list *cmdlist;
1.62 nicm 244: struct cmd *cmd;
1.51 nicm 245: enum msgtype msg;
246: struct passwd *pw;
1.63 nicm 247: struct options *oo, *so, *wo;
1.51 nicm 248: struct keylist *keylist;
1.70 nicm 249: struct env_data envdata;
1.51 nicm 250: struct msg_command_data cmddata;
251: char *s, *shellcmd, *path, *label, *home, *cause;
1.82 nicm 252: char **var;
1.51 nicm 253: void *buf;
254: size_t len;
1.64 nicm 255: int opt, flags, quiet = 0, cmdflags = 0;
1.55 nicm 256: short events;
1.54 nicm 257:
258: #ifdef DEBUG
259: malloc_options = (char *) "AFGJPX";
260: #endif
1.1 nicm 261:
1.45 nicm 262: flags = 0;
1.46 nicm 263: shellcmd = label = path = NULL;
1.70 nicm 264: envdata.path = NULL;
1.41 nicm 265: login_shell = (**argv == '-');
1.46 nicm 266: while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUv")) != -1) {
1.41 nicm 267: switch (opt) {
1.1 nicm 268: case '2':
269: flags |= IDENTIFY_256COLOURS;
270: flags &= ~IDENTIFY_88COLOURS;
271: break;
272: case '8':
273: flags |= IDENTIFY_88COLOURS;
274: flags &= ~IDENTIFY_256COLOURS;
275: break;
1.46 nicm 276: case 'c':
277: if (shellcmd != NULL)
278: xfree(shellcmd);
279: shellcmd = xstrdup(optarg);
1.37 nicm 280: break;
1.1 nicm 281: case 'f':
1.42 nicm 282: if (cfg_file != NULL)
1.2 ray 283: xfree(cfg_file);
1.1 nicm 284: cfg_file = xstrdup(optarg);
1.41 nicm 285: break;
286: case 'l':
287: login_shell = 1;
1.1 nicm 288: break;
289: case 'L':
290: if (label != NULL)
291: xfree(label);
292: label = xstrdup(optarg);
293: break;
1.37 nicm 294: case 'q':
1.63 nicm 295: quiet = 1;
1.37 nicm 296: break;
1.1 nicm 297: case 'S':
298: if (path != NULL)
299: xfree(path);
300: path = xstrdup(optarg);
301: break;
302: case 'u':
303: flags |= IDENTIFY_UTF8;
304: break;
305: case 'v':
306: debug_level++;
307: break;
1.53 deraadt 308: default:
1.1 nicm 309: usage();
1.53 deraadt 310: }
311: }
1.1 nicm 312: argc -= optind;
313: argv += optind;
314:
1.46 nicm 315: if (shellcmd != NULL && argc != 0)
316: usage();
317:
1.1 nicm 318: log_open_tty(debug_level);
319:
1.15 nicm 320: if (!(flags & IDENTIFY_UTF8)) {
321: /*
322: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
323: * exist (in that order) to contain UTF-8, it is a safe
324: * assumption that either they are using a UTF-8 terminal, or
325: * if not they know that output from UTF-8-capable programs may
326: * be wrong.
327: */
328: if ((s = getenv("LC_ALL")) == NULL) {
329: if ((s = getenv("LC_CTYPE")) == NULL)
330: s = getenv("LANG");
331: }
1.26 nicm 332: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
333: strcasestr(s, "UTF8") != NULL))
1.15 nicm 334: flags |= IDENTIFY_UTF8;
335: }
336:
1.42 nicm 337: environ_init(&global_environ);
1.62 nicm 338: for (var = environ; *var != NULL; var++)
1.42 nicm 339: environ_put(&global_environ, *var);
1.63 nicm 340:
341: options_init(&global_options, NULL);
342: oo = &global_options;
1.64 nicm 343: options_set_number(oo, "quiet", quiet);
1.65 nicm 344: options_set_number(oo, "escape-time", 500);
1.88 nicm 345: options_set_number(oo, "exit-unattached", 0);
1.42 nicm 346:
1.12 nicm 347: options_init(&global_s_options, NULL);
1.42 nicm 348: so = &global_s_options;
349: options_set_number(so, "base-index", 0);
350: options_set_number(so, "bell-action", BELL_ANY);
351: options_set_number(so, "buffer-limit", 9);
352: options_set_string(so, "default-command", "%s", "");
1.82 nicm 353: options_set_string(so, "default-path", "%s", "");
1.42 nicm 354: options_set_string(so, "default-shell", "%s", getshell());
355: options_set_string(so, "default-terminal", "screen");
1.88 nicm 356: options_set_number(so, "destroy-unattached", 0);
1.81 nicm 357: options_set_number(so, "detach-on-destroy", 1);
358: options_set_number(so, "display-panes-active-colour", 1);
1.42 nicm 359: options_set_number(so, "display-panes-colour", 4);
360: options_set_number(so, "display-panes-time", 1000);
361: options_set_number(so, "display-time", 750);
362: options_set_number(so, "history-limit", 2000);
363: options_set_number(so, "lock-after-time", 0);
1.45 nicm 364: options_set_string(so, "lock-command", "lock -np");
1.48 nicm 365: options_set_number(so, "lock-server", 1);
1.42 nicm 366: options_set_number(so, "message-attr", 0);
367: options_set_number(so, "message-bg", 3);
368: options_set_number(so, "message-fg", 0);
1.58 nicm 369: options_set_number(so, "message-limit", 20);
1.49 nicm 370: options_set_number(so, "mouse-select-pane", 0);
1.75 nicm 371: options_set_number(so, "pane-active-border-bg", 8);
372: options_set_number(so, "pane-active-border-fg", 2);
1.66 nicm 373: options_set_number(so, "pane-border-bg", 8);
374: options_set_number(so, "pane-border-fg", 8);
1.42 nicm 375: options_set_number(so, "repeat-time", 500);
376: options_set_number(so, "set-remain-on-exit", 0);
377: options_set_number(so, "set-titles", 0);
1.43 nicm 378: options_set_string(so, "set-titles-string", "#S:#I:#W - \"#T\"");
1.42 nicm 379: options_set_number(so, "status", 1);
380: options_set_number(so, "status-attr", 0);
381: options_set_number(so, "status-bg", 2);
382: options_set_number(so, "status-fg", 0);
383: options_set_number(so, "status-interval", 15);
384: options_set_number(so, "status-justify", 0);
385: options_set_number(so, "status-keys", MODEKEY_EMACS);
386: options_set_string(so, "status-left", "[#S]");
387: options_set_number(so, "status-left-attr", 0);
388: options_set_number(so, "status-left-bg", 8);
389: options_set_number(so, "status-left-fg", 8);
390: options_set_number(so, "status-left-length", 10);
391: options_set_string(so, "status-right", "\"#22T\" %%H:%%M %%d-%%b-%%y");
392: options_set_number(so, "status-right-attr", 0);
393: options_set_number(so, "status-right-bg", 8);
394: options_set_number(so, "status-right-fg", 8);
395: options_set_number(so, "status-right-length", 40);
396: options_set_string(so, "terminal-overrides",
397: "*88col*:colors=88,*256col*:colors=256");
398: options_set_string(so, "update-environment", "DISPLAY "
1.35 nicm 399: "WINDOWID SSH_ASKPASS SSH_AUTH_SOCK SSH_AGENT_PID SSH_CONNECTION");
1.42 nicm 400: options_set_number(so, "visual-activity", 0);
401: options_set_number(so, "visual-bell", 0);
402: options_set_number(so, "visual-content", 0);
1.44 nicm 403:
404: keylist = xmalloc(sizeof *keylist);
405: ARRAY_INIT(keylist);
406: ARRAY_ADD(keylist, '\002');
407: options_set_data(so, "prefix", keylist, xfree);
1.1 nicm 408:
1.12 nicm 409: options_init(&global_w_options, NULL);
1.42 nicm 410: wo = &global_w_options;
411: options_set_number(wo, "aggressive-resize", 0);
1.72 nicm 412: options_set_number(wo, "alternate-screen", 1);
1.42 nicm 413: options_set_number(wo, "automatic-rename", 1);
414: options_set_number(wo, "clock-mode-colour", 4);
415: options_set_number(wo, "clock-mode-style", 1);
416: options_set_number(wo, "force-height", 0);
417: options_set_number(wo, "force-width", 0);
418: options_set_number(wo, "main-pane-height", 24);
419: options_set_number(wo, "main-pane-width", 81);
420: options_set_number(wo, "mode-attr", 0);
421: options_set_number(wo, "mode-bg", 3);
422: options_set_number(wo, "mode-fg", 0);
423: options_set_number(wo, "mode-keys", MODEKEY_EMACS);
424: options_set_number(wo, "mode-mouse", 0);
425: options_set_number(wo, "monitor-activity", 0);
426: options_set_string(wo, "monitor-content", "%s", "");
427: options_set_number(wo, "window-status-attr", 0);
428: options_set_number(wo, "window-status-bg", 8);
429: options_set_number(wo, "window-status-current-attr", 0);
430: options_set_number(wo, "window-status-current-bg", 8);
431: options_set_number(wo, "window-status-current-fg", 8);
432: options_set_number(wo, "window-status-fg", 8);
1.79 nicm 433: options_set_number(wo, "window-status-alert-attr", GRID_ATTR_REVERSE);
434: options_set_number(wo, "window-status-alert-bg", 8);
435: options_set_number(wo, "window-status-alert-fg", 8);
1.60 nicm 436: options_set_string(wo, "window-status-format", "#I:#W#F");
437: options_set_string(wo, "window-status-current-format", "#I:#W#F");
1.73 nicm 438: options_set_string(wo, "word-separators", " -_@");
1.59 nicm 439: options_set_number(wo, "xterm-keys", 0);
1.62 nicm 440: options_set_number(wo, "remain-on-exit", 0);
1.47 nicm 441: options_set_number(wo, "synchronize-panes", 0);
1.42 nicm 442:
1.62 nicm 443: if (flags & IDENTIFY_UTF8) {
1.42 nicm 444: options_set_number(so, "status-utf8", 1);
445: options_set_number(wo, "utf8", 1);
446: } else {
447: options_set_number(so, "status-utf8", 0);
448: options_set_number(wo, "utf8", 0);
449: }
1.1 nicm 450:
451: if (cfg_file == NULL) {
452: home = getenv("HOME");
453: if (home == NULL || *home == '\0') {
454: pw = getpwuid(getuid());
455: if (pw != NULL)
456: home = pw->pw_dir;
457: }
458: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
1.69 nicm 459: if (access(cfg_file, R_OK) != 0 && errno == ENOENT) {
1.1 nicm 460: xfree(cfg_file);
461: cfg_file = NULL;
462: }
463: }
1.62 nicm 464:
1.68 nicm 465: /*
466: * Figure out the socket path. If specified on the command-line with
467: * -S or -L, use it, otherwise try $TMUX or assume -L default.
468: */
1.70 nicm 469: parse_env(&envdata);
1.68 nicm 470: if (path == NULL) {
471: /* No -L. Try $TMUX, or default. */
472: if (label == NULL) {
1.70 nicm 473: path = envdata.path;
474: if (path == NULL)
1.68 nicm 475: label = xstrdup("default");
476: }
477:
478: /* -L or default set. */
479: if (label != NULL) {
480: if ((path = makesockpath(label)) == NULL) {
481: log_warn("can't create socket");
482: exit(1);
483: }
484: }
1.1 nicm 485: }
1.68 nicm 486: if (label != NULL)
487: xfree(label);
1.1 nicm 488:
1.46 nicm 489: if (shellcmd != NULL) {
490: msg = MSG_SHELL;
491: buf = NULL;
492: len = 0;
1.51 nicm 493: } else {
1.70 nicm 494: cmddata.pid = envdata.pid;
495: cmddata.idx = envdata.idx;
1.62 nicm 496:
1.71 nicm 497: /* Prepare command for server. */
1.51 nicm 498: cmddata.argc = argc;
499: if (cmd_pack_argv(
500: argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
501: log_warnx("command too long");
502: exit(1);
503: }
1.62 nicm 504:
1.51 nicm 505: msg = MSG_COMMAND;
506: buf = &cmddata;
507: len = sizeof cmddata;
508: }
1.21 nicm 509:
1.46 nicm 510: if (shellcmd != NULL)
511: cmdflags |= CMD_STARTSERVER;
512: else if (argc == 0) /* new-session is the default */
1.71 nicm 513: cmdflags |= CMD_STARTSERVER|CMD_SENDENVIRON|CMD_CANTNEST;
1.21 nicm 514: else {
515: /*
516: * It sucks parsing the command string twice (in client and
517: * later in server) but it is necessary to get the start server
518: * flag.
519: */
520: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
521: log_warnx("%s", cause);
522: exit(1);
1.1 nicm 523: }
1.21 nicm 524: cmdflags &= ~CMD_STARTSERVER;
1.80 nicm 525: TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
1.29 nicm 526: if (cmd->entry->flags & CMD_STARTSERVER)
1.20 nicm 527: cmdflags |= CMD_STARTSERVER;
1.29 nicm 528: if (cmd->entry->flags & CMD_SENDENVIRON)
529: cmdflags |= CMD_SENDENVIRON;
1.71 nicm 530: if (cmd->entry->flags & CMD_CANTNEST)
531: cmdflags |= CMD_CANTNEST;
1.1 nicm 532: }
1.21 nicm 533: cmd_list_free(cmdlist);
1.71 nicm 534: }
535:
536: /*
537: * Check if this could be a nested session, if the command can't nest:
538: * if the socket path matches $TMUX, this is probably the same server.
539: */
540: if (shellcmd == NULL && envdata.path != NULL &&
541: cmdflags & CMD_CANTNEST &&
542: (path == envdata.path || strcmp(path, envdata.path) == 0)) {
543: log_warnx("sessions should be nested with care. "
544: "unset $TMUX to force.");
545: exit(1);
1.1 nicm 546: }
547:
1.78 nicm 548: ev_base = event_init();
549: set_signals(main_signal);
1.77 nicm 550:
1.76 nicm 551: /* Initialise the client socket/start the server. */
552: if ((main_ibuf = client_init(path, cmdflags, flags)) == NULL)
553: exit(1);
554: xfree(path);
555:
1.77 nicm 556: imsg_compose(main_ibuf, msg, PROTOCOL_VERSION, -1, -1, buf, len);
1.74 nicm 557:
1.55 nicm 558: events = EV_READ;
559: if (main_ibuf->w.queued > 0)
560: events |= EV_WRITE;
1.89 nicm 561: event_set(&main_event, main_ibuf->fd, events, main_callback, shellcmd);
562: event_add(&main_event, NULL);
1.55 nicm 563:
564: event_dispatch();
1.1 nicm 565:
1.89 nicm 566: event_del(&main_event);
567:
1.87 nicm 568: clear_signals(0);
1.55 nicm 569: client_main(); /* doesn't return */
570: }
1.31 nicm 571:
1.61 nicm 572: /* ARGSUSED */
1.55 nicm 573: void
574: main_signal(int sig, unused short events, unused void *data)
575: {
1.78 nicm 576: int status;
577:
1.55 nicm 578: switch (sig) {
579: case SIGTERM:
580: exit(1);
1.78 nicm 581: case SIGCHLD:
582: waitpid(WAIT_ANY, &status, WNOHANG);
583: break;
1.31 nicm 584: }
1.55 nicm 585: }
1.31 nicm 586:
1.61 nicm 587: /* ARGSUSED */
1.55 nicm 588: void
589: main_callback(unused int fd, short events, void *data)
590: {
591: char *shellcmd = data;
592:
593: if (events & EV_READ)
594: main_dispatch(shellcmd);
1.62 nicm 595:
1.55 nicm 596: if (events & EV_WRITE) {
597: if (msgbuf_write(&main_ibuf->w) < 0)
598: fatalx("msgbuf_write failed");
599: }
1.31 nicm 600:
1.89 nicm 601: event_del(&main_event);
1.55 nicm 602: events = EV_READ;
603: if (main_ibuf->w.queued > 0)
604: events |= EV_WRITE;
1.89 nicm 605: event_set(&main_event, main_ibuf->fd, events, main_callback, shellcmd);
606: event_add(&main_event, NULL);
1.31 nicm 607: }
608:
1.55 nicm 609: void
610: main_dispatch(const char *shellcmd)
1.31 nicm 611: {
612: struct imsg imsg;
613: ssize_t n, datalen;
1.46 nicm 614: struct msg_shell_data shelldata;
1.84 nicm 615: struct msg_exit_data exitdata;
1.1 nicm 616:
1.55 nicm 617: if ((n = imsg_read(main_ibuf)) == -1 || n == 0)
1.31 nicm 618: fatalx("imsg_read failed");
1.1 nicm 619:
1.31 nicm 620: for (;;) {
1.55 nicm 621: if ((n = imsg_get(main_ibuf, &imsg)) == -1)
1.31 nicm 622: fatalx("imsg_get failed");
623: if (n == 0)
1.55 nicm 624: return;
1.31 nicm 625: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1.1 nicm 626:
1.31 nicm 627: switch (imsg.hdr.type) {
1.1 nicm 628: case MSG_EXIT:
629: case MSG_SHUTDOWN:
1.84 nicm 630: if (datalen != sizeof exitdata) {
631: if (datalen != 0)
632: fatalx("bad MSG_EXIT size");
633: exit(0);
634: }
635: memcpy(&exitdata, imsg.data, sizeof exitdata);
636: exit(exitdata.retcode);
1.1 nicm 637: case MSG_READY:
1.31 nicm 638: if (datalen != 0)
639: fatalx("bad MSG_READY size");
640:
1.55 nicm 641: event_loopexit(NULL); /* move to client_main() */
642: break;
1.31 nicm 643: case MSG_VERSION:
644: if (datalen != 0)
645: fatalx("bad MSG_VERSION size");
646:
647: log_warnx("protocol version mismatch (client %u, "
648: "server %u)", PROTOCOL_VERSION, imsg.hdr.peerid);
1.55 nicm 649: exit(1);
1.46 nicm 650: case MSG_SHELL:
651: if (datalen != sizeof shelldata)
652: fatalx("bad MSG_SHELL size");
653: memcpy(&shelldata, imsg.data, sizeof shelldata);
654: shelldata.shell[(sizeof shelldata.shell) - 1] = '\0';
1.55 nicm 655:
1.87 nicm 656: clear_signals(0);
1.55 nicm 657:
1.46 nicm 658: shell_exec(shelldata.shell, shellcmd);
1.1 nicm 659: default:
1.31 nicm 660: fatalx("unexpected message");
1.1 nicm 661: }
1.31 nicm 662:
663: imsg_free(&imsg);
1.1 nicm 664: }
665: }
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