Annotation of src/usr.bin/tmux/client.c, Revision 1.56
1.56 ! nicm 1: /* $OpenBSD: client.c,v 1.55 2012/05/25 08:28:10 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>
1.51 nicm 20: #include <sys/file.h>
1.1 nicm 21: #include <sys/socket.h>
22: #include <sys/stat.h>
23: #include <sys/un.h>
24: #include <sys/wait.h>
25:
26: #include <errno.h>
1.30 nicm 27: #include <event.h>
1.1 nicm 28: #include <fcntl.h>
29: #include <pwd.h>
30: #include <stdlib.h>
31: #include <string.h>
32: #include <unistd.h>
33:
34: #include "tmux.h"
35:
1.25 nicm 36: struct imsgbuf client_ibuf;
1.30 nicm 37: struct event client_event;
1.54 nicm 38: struct event client_stdin;
1.52 nicm 39: enum {
40: CLIENT_EXIT_NONE,
41: CLIENT_EXIT_DETACHED,
42: CLIENT_EXIT_DETACHED_HUP,
43: CLIENT_EXIT_LOST_TTY,
44: CLIENT_EXIT_TERMINATED,
45: CLIENT_EXIT_LOST_SERVER,
46: CLIENT_EXIT_EXITED,
47: CLIENT_EXIT_SERVER_EXITED,
48: } client_exitreason = CLIENT_EXIT_NONE;
1.32 nicm 49: int client_exitval;
1.48 nicm 50: enum msgtype client_exittype;
1.46 nicm 51: int client_attached;
1.1 nicm 52:
1.49 nicm 53: int client_get_lock(char *);
1.46 nicm 54: int client_connect(char *, int);
1.30 nicm 55: void client_send_identify(int);
56: void client_send_environ(void);
57: void client_write_server(enum msgtype, void *, size_t);
1.31 nicm 58: void client_update_event(void);
1.30 nicm 59: void client_signal(int, short, void *);
1.54 nicm 60: void client_stdin_callback(int, short, void *);
1.30 nicm 61: void client_callback(int, short, void *);
1.46 nicm 62: int client_dispatch_attached(void);
63: int client_dispatch_wait(void *);
1.53 nicm 64: const char *client_exit_message(void);
1.25 nicm 65:
1.49 nicm 66: /*
67: * Get server create lock. If already held then server start is happening in
68: * another client, so block until the lock is released and return -1 to
69: * retry. Ignore other errors - just continue and start the server without the
70: * lock.
71: */
72: int
73: client_get_lock(char *lockfile)
74: {
75: int lockfd;
76:
77: if ((lockfd = open(lockfile, O_WRONLY|O_CREAT, 0600)) == -1)
78: fatal("open failed");
79:
80: if (flock(lockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
81: while (flock(lockfd, LOCK_EX) == -1 && errno == EINTR)
82: /* nothing */;
83: close(lockfd);
84: return (-1);
85: }
86:
87: return (lockfd);
88: }
89:
1.46 nicm 90: /* Connect client to server. */
91: int
92: client_connect(char *path, int start_server)
1.1 nicm 93: {
1.26 nicm 94: struct sockaddr_un sa;
95: size_t size;
1.49 nicm 96: int fd, lockfd;
97: char *lockfile;
1.1 nicm 98:
99: memset(&sa, 0, sizeof sa);
100: sa.sun_family = AF_UNIX;
101: size = strlcpy(sa.sun_path, path, sizeof sa.sun_path);
102: if (size >= sizeof sa.sun_path) {
103: errno = ENAMETOOLONG;
1.46 nicm 104: return (-1);
1.1 nicm 105: }
106:
1.49 nicm 107: retry:
1.10 nicm 108: if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
1.18 nicm 109: fatal("socket failed");
1.1 nicm 110:
1.10 nicm 111: if (connect(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1) {
1.49 nicm 112: if (errno != ECONNREFUSED && errno != ENOENT)
113: goto failed;
1.46 nicm 114: if (!start_server)
115: goto failed;
1.49 nicm 116: close(fd);
117:
118: xasprintf(&lockfile, "%s.lock", path);
119: if ((lockfd = client_get_lock(lockfile)) == -1)
120: goto retry;
121: if (unlink(path) != 0 && errno != ENOENT)
122: return (-1);
123: fd = server_start(lockfd, lockfile);
124: xfree(lockfile);
125: close(lockfd);
1.1 nicm 126: }
127:
1.47 nicm 128: setblocking(fd, 0);
1.46 nicm 129: return (fd);
130:
131: failed:
132: close(fd);
133: return (-1);
134: }
135:
1.52 nicm 136: /* Get exit string from reason number. */
137: const char *
138: client_exit_message(void)
139: {
140: switch (client_exitreason) {
141: case CLIENT_EXIT_NONE:
142: break;
143: case CLIENT_EXIT_DETACHED:
144: return ("detached");
145: case CLIENT_EXIT_DETACHED_HUP:
146: return ("detached and SIGHUP");
147: case CLIENT_EXIT_LOST_TTY:
148: return ("lost tty");
149: case CLIENT_EXIT_TERMINATED:
150: return ("terminated");
151: case CLIENT_EXIT_LOST_SERVER:
152: return ("lost server");
153: case CLIENT_EXIT_EXITED:
154: return ("exited");
155: case CLIENT_EXIT_SERVER_EXITED:
156: return ("server exited");
157: }
158: return ("unknown reason");
159: }
160:
1.46 nicm 161: /* Client main loop. */
162: int
163: client_main(int argc, char **argv, int flags)
164: {
165: struct cmd *cmd;
166: struct cmd_list *cmdlist;
167: struct msg_command_data cmddata;
168: int cmdflags, fd;
1.48 nicm 169: pid_t ppid;
1.46 nicm 170: enum msgtype msg;
171: char *cause;
1.56 ! nicm 172: struct termios tio, saved_tio;
1.46 nicm 173:
174: /* Set up the initial command. */
175: cmdflags = 0;
176: if (shell_cmd != NULL) {
177: msg = MSG_SHELL;
178: cmdflags = CMD_STARTSERVER;
179: } else if (argc == 0) {
180: msg = MSG_COMMAND;
181: cmdflags = CMD_STARTSERVER|CMD_SENDENVIRON|CMD_CANTNEST;
182: } else {
183: msg = MSG_COMMAND;
184:
185: /*
186: * It sucks parsing the command string twice (in client and
187: * later in server) but it is necessary to get the start server
188: * flag.
189: */
190: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
191: log_warnx("%s", cause);
192: return (1);
193: }
194: cmdflags &= ~CMD_STARTSERVER;
195: TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
196: if (cmd->entry->flags & CMD_STARTSERVER)
197: cmdflags |= CMD_STARTSERVER;
198: if (cmd->entry->flags & CMD_SENDENVIRON)
199: cmdflags |= CMD_SENDENVIRON;
200: if (cmd->entry->flags & CMD_CANTNEST)
201: cmdflags |= CMD_CANTNEST;
202: }
203: cmd_list_free(cmdlist);
204: }
205:
206: /*
207: * Check if this could be a nested session, if the command can't nest:
208: * if the socket path matches $TMUX, this is probably the same server.
209: */
210: if (shell_cmd == NULL && environ_path != NULL &&
1.52 nicm 211: (cmdflags & CMD_CANTNEST) &&
212: strcmp(socket_path, environ_path) == 0) {
1.55 nicm 213: fprintf(stderr, "sessions should be nested with care, "
214: "unset $TMUX to force\n");
1.46 nicm 215: return (1);
216: }
217:
218: /* Initialise the client socket and start the server. */
219: fd = client_connect(socket_path, cmdflags & CMD_STARTSERVER);
220: if (fd == -1) {
1.55 nicm 221: fprintf(stderr, "failed to connect to server\n");
1.46 nicm 222: return (1);
223: }
224:
225: /* Set process title, log and signals now this is the client. */
226: setproctitle("client (%s)", socket_path);
227: logfile("client");
228:
229: /* Create imsg. */
1.25 nicm 230: imsg_init(&client_ibuf, fd);
1.46 nicm 231: event_set(&client_event, fd, EV_READ, client_callback, shell_cmd);
232:
1.54 nicm 233: /* Create stdin handler. */
234: setblocking(STDIN_FILENO, 0);
235: event_set(&client_stdin, STDIN_FILENO, EV_READ|EV_PERSIST,
236: client_stdin_callback, NULL);
1.56 ! nicm 237: if (flags & IDENTIFY_TERMIOS) {
! 238: if (tcgetattr(STDIN_FILENO, &saved_tio) != 0) {
! 239: fprintf(stderr, "tcgetattr failed: %s\n",
! 240: strerror(errno));
! 241: return (1);
! 242: }
! 243: cfmakeraw(&tio);
! 244: tio.c_iflag = ICRNL|IXANY;
! 245: tio.c_oflag = OPOST|ONLCR;
! 246: tio.c_lflag = NOKERNINFO;
! 247: tio.c_cflag = CREAD|CS8|HUPCL;
! 248: tio.c_cc[VMIN] = 1;
! 249: tio.c_cc[VTIME] = 0;
! 250: cfsetispeed(&tio, cfgetispeed(&saved_tio));
! 251: cfsetospeed(&tio, cfgetospeed(&saved_tio));
! 252: tcsetattr(STDIN_FILENO, TCSANOW, &tio);
! 253: }
1.54 nicm 254:
1.46 nicm 255: /* Establish signal handlers. */
256: set_signals(client_signal);
1.1 nicm 257:
1.46 nicm 258: /* Send initial environment. */
1.11 nicm 259: if (cmdflags & CMD_SENDENVIRON)
1.25 nicm 260: client_send_environ();
1.42 nicm 261: client_send_identify(flags);
1.1 nicm 262:
1.46 nicm 263: /* Send first command. */
264: if (msg == MSG_COMMAND) {
265: /* Fill in command line arguments. */
266: cmddata.pid = environ_pid;
267: cmddata.idx = environ_idx;
268:
269: /* Prepare command for server. */
270: cmddata.argc = argc;
271: if (cmd_pack_argv(
272: argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
1.55 nicm 273: fprintf(stderr, "command too long\n");
1.46 nicm 274: return (1);
275: }
276:
277: client_write_server(msg, &cmddata, sizeof cmddata);
278: } else if (msg == MSG_SHELL)
279: client_write_server(msg, NULL, 0);
1.1 nicm 280:
1.46 nicm 281: /* Set the event and dispatch. */
282: client_update_event();
1.54 nicm 283: event_add (&client_stdin, NULL);
1.46 nicm 284: event_dispatch();
285:
286: /* Print the exit message, if any, and exit. */
1.48 nicm 287: if (client_attached) {
1.52 nicm 288: if (client_exitreason != CLIENT_EXIT_NONE && !login_shell)
289: printf("[%s]\n", client_exit_message());
1.48 nicm 290:
291: ppid = getppid();
292: if (client_exittype == MSG_DETACHKILL && ppid > 1)
293: kill(ppid, SIGHUP);
1.56 ! nicm 294: } else if (flags & IDENTIFY_TERMIOS)
! 295: tcsetattr(STDOUT_FILENO, TCSAFLUSH, &saved_tio);
1.54 nicm 296: setblocking(STDIN_FILENO, 1);
1.46 nicm 297: return (client_exitval);
1.1 nicm 298: }
299:
1.46 nicm 300: /* Send identify message to server with the file descriptors. */
1.11 nicm 301: void
1.26 nicm 302: client_send_identify(int flags)
303: {
304: struct msg_identify_data data;
305: char *term;
306: int fd;
307:
308: data.flags = flags;
309:
310: if (getcwd(data.cwd, sizeof data.cwd) == NULL)
311: *data.cwd = '\0';
1.35 nicm 312:
1.26 nicm 313: term = getenv("TERM");
314: if (term == NULL ||
315: strlcpy(data.term, term, sizeof data.term) >= sizeof data.term)
316: *data.term = '\0';
317:
1.50 nicm 318: if ((fd = dup(STDIN_FILENO)) == -1)
319: fatal("dup failed");
320: imsg_compose(&client_ibuf,
321: MSG_IDENTIFY, PROTOCOL_VERSION, -1, fd, &data, sizeof data);
1.54 nicm 322: client_update_event();
1.26 nicm 323: }
324:
1.46 nicm 325: /* Forward entire environment to server. */
1.26 nicm 326: void
1.25 nicm 327: client_send_environ(void)
1.11 nicm 328: {
1.26 nicm 329: struct msg_environ_data data;
1.11 nicm 330: char **var;
331:
1.35 nicm 332: for (var = environ; *var != NULL; var++) {
1.11 nicm 333: if (strlcpy(data.var, *var, sizeof data.var) >= sizeof data.var)
334: continue;
1.25 nicm 335: client_write_server(MSG_ENVIRON, &data, sizeof data);
1.11 nicm 336: }
337: }
338:
1.46 nicm 339: /* Write a message to the server without a file descriptor. */
1.25 nicm 340: void
341: client_write_server(enum msgtype type, void *buf, size_t len)
342: {
1.35 nicm 343: imsg_compose(&client_ibuf, type, PROTOCOL_VERSION, -1, -1, buf, len);
1.54 nicm 344: client_update_event();
1.25 nicm 345: }
346:
1.46 nicm 347: /* Update client event based on whether it needs to read or read and write. */
1.31 nicm 348: void
349: client_update_event(void)
350: {
351: short events;
352:
353: event_del(&client_event);
354: events = EV_READ;
355: if (client_ibuf.w.queued > 0)
356: events |= EV_WRITE;
1.46 nicm 357: event_set(
358: &client_event, client_ibuf.fd, events, client_callback, shell_cmd);
1.31 nicm 359: event_add(&client_event, NULL);
360: }
361:
1.46 nicm 362: /* Callback to handle signals in the client. */
1.34 nicm 363: /* ARGSUSED */
1.30 nicm 364: void
1.31 nicm 365: client_signal(int sig, unused short events, unused void *data)
1.30 nicm 366: {
1.46 nicm 367: struct sigaction sigact;
368: int status;
1.30 nicm 369:
1.46 nicm 370: if (!client_attached) {
371: switch (sig) {
372: case SIGCHLD:
373: waitpid(WAIT_ANY, &status, WNOHANG);
374: break;
375: case SIGTERM:
376: event_loopexit(NULL);
377: break;
378: }
379: } else {
380: switch (sig) {
381: case SIGHUP:
1.52 nicm 382: client_exitreason = CLIENT_EXIT_LOST_TTY;
1.46 nicm 383: client_exitval = 1;
384: client_write_server(MSG_EXITING, NULL, 0);
385: break;
386: case SIGTERM:
1.52 nicm 387: client_exitreason = CLIENT_EXIT_TERMINATED;
1.46 nicm 388: client_exitval = 1;
389: client_write_server(MSG_EXITING, NULL, 0);
390: break;
391: case SIGWINCH:
392: client_write_server(MSG_RESIZE, NULL, 0);
393: break;
394: case SIGCONT:
395: memset(&sigact, 0, sizeof sigact);
396: sigemptyset(&sigact.sa_mask);
397: sigact.sa_flags = SA_RESTART;
398: sigact.sa_handler = SIG_IGN;
399: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
400: fatal("sigaction failed");
401: client_write_server(MSG_WAKEUP, NULL, 0);
402: break;
403: }
1.30 nicm 404: }
405:
1.31 nicm 406: client_update_event();
1.30 nicm 407: }
408:
1.46 nicm 409: /* Callback for client imsg read events. */
1.34 nicm 410: /* ARGSUSED */
1.30 nicm 411: void
1.46 nicm 412: client_callback(unused int fd, short events, void *data)
1.30 nicm 413: {
1.33 nicm 414: ssize_t n;
1.46 nicm 415: int retval;
1.30 nicm 416:
417: if (events & EV_READ) {
418: if ((n = imsg_read(&client_ibuf)) == -1 || n == 0)
419: goto lost_server;
1.46 nicm 420: if (client_attached)
421: retval = client_dispatch_attached();
422: else
423: retval = client_dispatch_wait(data);
424: if (retval != 0) {
1.30 nicm 425: event_loopexit(NULL);
426: return;
1.35 nicm 427: }
1.30 nicm 428: }
1.35 nicm 429:
1.30 nicm 430: if (events & EV_WRITE) {
431: if (msgbuf_write(&client_ibuf.w) < 0)
432: goto lost_server;
433: }
434:
1.31 nicm 435: client_update_event();
1.30 nicm 436: return;
437:
438: lost_server:
1.52 nicm 439: client_exitreason = CLIENT_EXIT_LOST_SERVER;
1.32 nicm 440: client_exitval = 1;
1.30 nicm 441: event_loopexit(NULL);
442: }
443:
1.54 nicm 444: /* Callback for client stdin read events. */
445: /* ARGSUSED */
446: void
447: client_stdin_callback(unused int fd, unused short events, unused void *data1)
448: {
449: struct msg_stdin_data data;
450:
451: data.size = read(STDIN_FILENO, data.data, sizeof data.data);
452: if (data.size < 0 && (errno == EINTR || errno == EAGAIN))
453: return;
454:
455: client_write_server(MSG_STDIN, &data, sizeof data);
456: if (data.size <= 0)
457: event_del(&client_stdin);
458: client_update_event();
459: }
460:
1.46 nicm 461: /* Dispatch imsgs when in wait state (before MSG_READY). */
462: int
463: client_dispatch_wait(void *data)
464: {
465: struct imsg imsg;
466: ssize_t n, datalen;
467: struct msg_shell_data shelldata;
468: struct msg_exit_data exitdata;
1.54 nicm 469: struct msg_stdout_data stdoutdata;
470: struct msg_stderr_data stderrdata;
1.46 nicm 471: const char *shellcmd = data;
472:
473: for (;;) {
474: if ((n = imsg_get(&client_ibuf, &imsg)) == -1)
475: fatalx("imsg_get failed");
476: if (n == 0)
477: return (0);
478: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
479:
1.54 nicm 480: log_debug("got %d from server", imsg.hdr.type);
1.46 nicm 481: switch (imsg.hdr.type) {
482: case MSG_EXIT:
483: case MSG_SHUTDOWN:
484: if (datalen != sizeof exitdata) {
485: if (datalen != 0)
486: fatalx("bad MSG_EXIT size");
487: } else {
488: memcpy(&exitdata, imsg.data, sizeof exitdata);
489: client_exitval = exitdata.retcode;
490: }
491: imsg_free(&imsg);
492: return (-1);
493: case MSG_READY:
494: if (datalen != 0)
495: fatalx("bad MSG_READY size");
496:
1.54 nicm 497: event_del(&client_stdin);
1.46 nicm 498: client_attached = 1;
499: break;
1.54 nicm 500: case MSG_STDOUT:
501: if (datalen != sizeof stdoutdata)
502: fatalx("bad MSG_STDOUT");
503: memcpy(&stdoutdata, imsg.data, sizeof stdoutdata);
504:
505: fwrite(stdoutdata.data, stdoutdata.size, 1, stdout);
506: break;
507: case MSG_STDERR:
508: if (datalen != sizeof stderrdata)
509: fatalx("bad MSG_STDERR");
510: memcpy(&stderrdata, imsg.data, sizeof stderrdata);
511:
512: fwrite(stderrdata.data, stderrdata.size, 1, stderr);
513: break;
1.46 nicm 514: case MSG_VERSION:
515: if (datalen != 0)
516: fatalx("bad MSG_VERSION size");
517:
1.54 nicm 518: fprintf(stderr, "protocol version mismatch "
519: "(client %u, server %u)\n", PROTOCOL_VERSION,
520: imsg.hdr.peerid);
1.46 nicm 521: client_exitval = 1;
522:
523: imsg_free(&imsg);
524: return (-1);
525: case MSG_SHELL:
526: if (datalen != sizeof shelldata)
527: fatalx("bad MSG_SHELL size");
528: memcpy(&shelldata, imsg.data, sizeof shelldata);
529: shelldata.shell[(sizeof shelldata.shell) - 1] = '\0';
530:
531: clear_signals(0);
532:
533: shell_exec(shelldata.shell, shellcmd);
534: /* NOTREACHED */
1.56 ! nicm 535: case MSG_DETACH:
! 536: client_write_server(MSG_EXITING, NULL, 0);
! 537: break;
! 538: case MSG_EXITED:
! 539: imsg_free(&imsg);
! 540: return (-1);
1.46 nicm 541: default:
542: fatalx("unexpected message");
543: }
544:
545: imsg_free(&imsg);
546: }
547: }
548:
549: /* Dispatch imsgs in attached state (after MSG_READY). */
550: /* ARGSUSED */
1.9 nicm 551: int
1.46 nicm 552: client_dispatch_attached(void)
1.9 nicm 553: {
1.30 nicm 554: struct imsg imsg;
555: struct msg_lock_data lockdata;
556: struct sigaction sigact;
557: ssize_t n, datalen;
1.9 nicm 558:
559: for (;;) {
1.25 nicm 560: if ((n = imsg_get(&client_ibuf, &imsg)) == -1)
1.12 nicm 561: fatalx("imsg_get failed");
562: if (n == 0)
1.9 nicm 563: return (0);
1.12 nicm 564: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1.9 nicm 565:
1.55 nicm 566: log_debug("got %d from server", imsg.hdr.type);
1.12 nicm 567: switch (imsg.hdr.type) {
1.48 nicm 568: case MSG_DETACHKILL:
1.9 nicm 569: case MSG_DETACH:
1.12 nicm 570: if (datalen != 0)
1.9 nicm 571: fatalx("bad MSG_DETACH size");
572:
1.48 nicm 573: client_exittype = imsg.hdr.type;
574: if (imsg.hdr.type == MSG_DETACHKILL)
1.52 nicm 575: client_exitreason = CLIENT_EXIT_DETACHED_HUP;
1.48 nicm 576: else
1.52 nicm 577: client_exitreason = CLIENT_EXIT_DETACHED;
1.25 nicm 578: client_write_server(MSG_EXITING, NULL, 0);
1.9 nicm 579: break;
580: case MSG_EXIT:
1.43 nicm 581: if (datalen != 0 &&
582: datalen != sizeof (struct msg_exit_data))
1.9 nicm 583: fatalx("bad MSG_EXIT size");
1.12 nicm 584:
1.25 nicm 585: client_write_server(MSG_EXITING, NULL, 0);
1.52 nicm 586: client_exitreason = CLIENT_EXIT_EXITED;
1.9 nicm 587: break;
588: case MSG_EXITED:
1.12 nicm 589: if (datalen != 0)
1.9 nicm 590: fatalx("bad MSG_EXITED size");
591:
1.12 nicm 592: imsg_free(&imsg);
1.9 nicm 593: return (-1);
594: case MSG_SHUTDOWN:
1.12 nicm 595: if (datalen != 0)
1.9 nicm 596: fatalx("bad MSG_SHUTDOWN size");
597:
1.25 nicm 598: client_write_server(MSG_EXITING, NULL, 0);
1.52 nicm 599: client_exitreason = CLIENT_EXIT_SERVER_EXITED;
1.32 nicm 600: client_exitval = 1;
1.9 nicm 601: break;
602: case MSG_SUSPEND:
1.12 nicm 603: if (datalen != 0)
1.9 nicm 604: fatalx("bad MSG_SUSPEND size");
605:
1.30 nicm 606: memset(&sigact, 0, sizeof sigact);
607: sigemptyset(&sigact.sa_mask);
608: sigact.sa_flags = SA_RESTART;
609: sigact.sa_handler = SIG_DFL;
610: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
611: fatal("sigaction failed");
612: kill(getpid(), SIGTSTP);
1.21 nicm 613: break;
614: case MSG_LOCK:
615: if (datalen != sizeof lockdata)
616: fatalx("bad MSG_LOCK size");
617: memcpy(&lockdata, imsg.data, sizeof lockdata);
1.35 nicm 618:
1.21 nicm 619: lockdata.cmd[(sizeof lockdata.cmd) - 1] = '\0';
620: system(lockdata.cmd);
1.25 nicm 621: client_write_server(MSG_UNLOCK, NULL, 0);
1.9 nicm 622: break;
623: default:
624: fatalx("unexpected message");
625: }
1.12 nicm 626:
627: imsg_free(&imsg);
1.9 nicm 628: }
1.1 nicm 629: }
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