Annotation of src/usr.bin/tmux/client.c, Revision 1.69
1.69 ! nicm 1: /* $OpenBSD: client.c,v 1.68 2013/10/10 12:12:08 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 *);
1.57 nicm 61: void client_write(int, const char *, size_t);
1.30 nicm 62: void client_callback(int, short, void *);
1.46 nicm 63: int client_dispatch_attached(void);
64: int client_dispatch_wait(void *);
1.53 nicm 65: const char *client_exit_message(void);
1.25 nicm 66:
1.49 nicm 67: /*
68: * Get server create lock. If already held then server start is happening in
69: * another client, so block until the lock is released and return -1 to
70: * retry. Ignore other errors - just continue and start the server without the
71: * lock.
72: */
73: int
74: client_get_lock(char *lockfile)
75: {
76: int lockfd;
77:
78: if ((lockfd = open(lockfile, O_WRONLY|O_CREAT, 0600)) == -1)
79: fatal("open failed");
80:
1.66 nicm 81: if (lockf(lockfd, F_TLOCK, 0) == -1 && errno == EAGAIN) {
82: while (lockf(lockfd, F_LOCK, 0) == -1 && errno == EINTR)
1.49 nicm 83: /* nothing */;
84: close(lockfd);
85: return (-1);
86: }
87:
88: return (lockfd);
89: }
90:
1.46 nicm 91: /* Connect client to server. */
92: int
93: client_connect(char *path, int start_server)
1.1 nicm 94: {
1.26 nicm 95: struct sockaddr_un sa;
96: size_t size;
1.49 nicm 97: int fd, lockfd;
98: char *lockfile;
1.1 nicm 99:
100: memset(&sa, 0, sizeof sa);
101: sa.sun_family = AF_UNIX;
102: size = strlcpy(sa.sun_path, path, sizeof sa.sun_path);
103: if (size >= sizeof sa.sun_path) {
104: errno = ENAMETOOLONG;
1.46 nicm 105: return (-1);
1.1 nicm 106: }
107:
1.49 nicm 108: retry:
1.10 nicm 109: if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
1.18 nicm 110: fatal("socket failed");
1.1 nicm 111:
1.10 nicm 112: if (connect(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1) {
1.49 nicm 113: if (errno != ECONNREFUSED && errno != ENOENT)
114: goto failed;
1.46 nicm 115: if (!start_server)
116: goto failed;
1.49 nicm 117: close(fd);
118:
119: xasprintf(&lockfile, "%s.lock", path);
120: if ((lockfd = client_get_lock(lockfile)) == -1)
121: goto retry;
122: if (unlink(path) != 0 && errno != ENOENT)
123: return (-1);
124: fd = server_start(lockfd, lockfile);
1.58 nicm 125: free(lockfile);
1.49 nicm 126: close(lockfd);
1.1 nicm 127: }
128:
1.47 nicm 129: setblocking(fd, 0);
1.46 nicm 130: return (fd);
131:
132: failed:
133: close(fd);
134: return (-1);
135: }
136:
1.52 nicm 137: /* Get exit string from reason number. */
138: const char *
139: client_exit_message(void)
140: {
141: switch (client_exitreason) {
142: case CLIENT_EXIT_NONE:
143: break;
144: case CLIENT_EXIT_DETACHED:
145: return ("detached");
146: case CLIENT_EXIT_DETACHED_HUP:
147: return ("detached and SIGHUP");
148: case CLIENT_EXIT_LOST_TTY:
149: return ("lost tty");
150: case CLIENT_EXIT_TERMINATED:
151: return ("terminated");
152: case CLIENT_EXIT_LOST_SERVER:
153: return ("lost server");
154: case CLIENT_EXIT_EXITED:
155: return ("exited");
156: case CLIENT_EXIT_SERVER_EXITED:
157: return ("server exited");
158: }
159: return ("unknown reason");
160: }
161:
1.46 nicm 162: /* Client main loop. */
163: int
164: client_main(int argc, char **argv, int flags)
165: {
166: struct cmd *cmd;
167: struct cmd_list *cmdlist;
168: struct msg_command_data cmddata;
169: int cmdflags, fd;
1.48 nicm 170: pid_t ppid;
1.46 nicm 171: enum msgtype msg;
172: char *cause;
1.56 nicm 173: struct termios tio, saved_tio;
1.46 nicm 174:
175: /* Set up the initial command. */
176: cmdflags = 0;
177: if (shell_cmd != NULL) {
178: msg = MSG_SHELL;
179: cmdflags = CMD_STARTSERVER;
180: } else if (argc == 0) {
181: msg = MSG_COMMAND;
1.67 nicm 182: cmdflags = CMD_STARTSERVER|CMD_CANTNEST;
1.46 nicm 183: } else {
184: msg = MSG_COMMAND;
185:
186: /*
187: * It sucks parsing the command string twice (in client and
188: * later in server) but it is necessary to get the start server
189: * flag.
190: */
1.62 nicm 191: cmdlist = cmd_list_parse(argc, argv, NULL, 0, &cause);
192: if (cmdlist == NULL) {
1.59 nicm 193: fprintf(stderr, "%s\n", cause);
1.46 nicm 194: return (1);
195: }
196: cmdflags &= ~CMD_STARTSERVER;
197: TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
198: if (cmd->entry->flags & CMD_STARTSERVER)
199: cmdflags |= CMD_STARTSERVER;
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);
1.68 nicm 237: if (flags & CLIENT_CONTROLCONTROL) {
1.56 nicm 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. */
1.67 nicm 259: client_send_environ();
1.42 nicm 260: client_send_identify(flags);
1.1 nicm 261:
1.46 nicm 262: /* Send first command. */
263: if (msg == MSG_COMMAND) {
264: /* Fill in command line arguments. */
265: cmddata.pid = environ_pid;
1.64 nicm 266: cmddata.session_id = environ_session_id;
1.46 nicm 267:
268: /* Prepare command for server. */
269: cmddata.argc = argc;
270: if (cmd_pack_argv(
271: argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
1.55 nicm 272: fprintf(stderr, "command too long\n");
1.46 nicm 273: return (1);
274: }
275:
276: client_write_server(msg, &cmddata, sizeof cmddata);
277: } else if (msg == MSG_SHELL)
278: client_write_server(msg, NULL, 0);
1.1 nicm 279:
1.46 nicm 280: /* Set the event and dispatch. */
281: client_update_event();
282: event_dispatch();
283:
284: /* Print the exit message, if any, and exit. */
1.48 nicm 285: if (client_attached) {
1.52 nicm 286: if (client_exitreason != CLIENT_EXIT_NONE && !login_shell)
287: printf("[%s]\n", client_exit_message());
1.48 nicm 288:
289: ppid = getppid();
290: if (client_exittype == MSG_DETACHKILL && ppid > 1)
291: kill(ppid, SIGHUP);
1.68 nicm 292: } else if (flags & CLIENT_CONTROLCONTROL) {
293: if (client_exitreason != CLIENT_EXIT_NONE)
294: printf("%%exit %s\n", client_exit_message());
295: else
296: printf("%%exit\n");
297: printf("\033\\");
1.56 nicm 298: tcsetattr(STDOUT_FILENO, TCSAFLUSH, &saved_tio);
1.63 nicm 299: }
1.54 nicm 300: setblocking(STDIN_FILENO, 1);
1.46 nicm 301: return (client_exitval);
1.1 nicm 302: }
303:
1.46 nicm 304: /* Send identify message to server with the file descriptors. */
1.11 nicm 305: void
1.26 nicm 306: client_send_identify(int flags)
307: {
308: struct msg_identify_data data;
309: char *term;
310: int fd;
311:
312: data.flags = flags;
313:
314: if (getcwd(data.cwd, sizeof data.cwd) == NULL)
315: *data.cwd = '\0';
1.35 nicm 316:
1.26 nicm 317: term = getenv("TERM");
318: if (term == NULL ||
319: strlcpy(data.term, term, sizeof data.term) >= sizeof data.term)
320: *data.term = '\0';
321:
1.50 nicm 322: if ((fd = dup(STDIN_FILENO)) == -1)
323: fatal("dup failed");
324: imsg_compose(&client_ibuf,
325: MSG_IDENTIFY, PROTOCOL_VERSION, -1, fd, &data, sizeof data);
1.54 nicm 326: client_update_event();
1.26 nicm 327: }
328:
1.46 nicm 329: /* Forward entire environment to server. */
1.26 nicm 330: void
1.25 nicm 331: client_send_environ(void)
1.11 nicm 332: {
1.26 nicm 333: struct msg_environ_data data;
1.11 nicm 334: char **var;
335:
1.35 nicm 336: for (var = environ; *var != NULL; var++) {
1.11 nicm 337: if (strlcpy(data.var, *var, sizeof data.var) >= sizeof data.var)
338: continue;
1.25 nicm 339: client_write_server(MSG_ENVIRON, &data, sizeof data);
1.11 nicm 340: }
341: }
342:
1.46 nicm 343: /* Write a message to the server without a file descriptor. */
1.25 nicm 344: void
345: client_write_server(enum msgtype type, void *buf, size_t len)
346: {
1.35 nicm 347: imsg_compose(&client_ibuf, type, PROTOCOL_VERSION, -1, -1, buf, len);
1.54 nicm 348: client_update_event();
1.25 nicm 349: }
350:
1.46 nicm 351: /* Update client event based on whether it needs to read or read and write. */
1.31 nicm 352: void
353: client_update_event(void)
354: {
355: short events;
356:
357: event_del(&client_event);
358: events = EV_READ;
359: if (client_ibuf.w.queued > 0)
360: events |= EV_WRITE;
1.46 nicm 361: event_set(
362: &client_event, client_ibuf.fd, events, client_callback, shell_cmd);
1.31 nicm 363: event_add(&client_event, NULL);
364: }
365:
1.46 nicm 366: /* Callback to handle signals in the client. */
1.30 nicm 367: void
1.31 nicm 368: client_signal(int sig, unused short events, unused void *data)
1.30 nicm 369: {
1.46 nicm 370: struct sigaction sigact;
371: int status;
1.30 nicm 372:
1.46 nicm 373: if (!client_attached) {
374: switch (sig) {
375: case SIGCHLD:
376: waitpid(WAIT_ANY, &status, WNOHANG);
377: break;
378: case SIGTERM:
379: event_loopexit(NULL);
380: break;
381: }
382: } else {
383: switch (sig) {
384: case SIGHUP:
1.52 nicm 385: client_exitreason = CLIENT_EXIT_LOST_TTY;
1.46 nicm 386: client_exitval = 1;
387: client_write_server(MSG_EXITING, NULL, 0);
388: break;
389: case SIGTERM:
1.52 nicm 390: client_exitreason = CLIENT_EXIT_TERMINATED;
1.46 nicm 391: client_exitval = 1;
392: client_write_server(MSG_EXITING, NULL, 0);
393: break;
394: case SIGWINCH:
395: client_write_server(MSG_RESIZE, NULL, 0);
396: break;
397: case SIGCONT:
398: memset(&sigact, 0, sizeof sigact);
399: sigemptyset(&sigact.sa_mask);
400: sigact.sa_flags = SA_RESTART;
401: sigact.sa_handler = SIG_IGN;
402: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
403: fatal("sigaction failed");
404: client_write_server(MSG_WAKEUP, NULL, 0);
405: break;
406: }
1.30 nicm 407: }
408:
1.31 nicm 409: client_update_event();
1.30 nicm 410: }
411:
1.46 nicm 412: /* Callback for client imsg read events. */
1.30 nicm 413: void
1.46 nicm 414: client_callback(unused int fd, short events, void *data)
1.30 nicm 415: {
1.33 nicm 416: ssize_t n;
1.46 nicm 417: int retval;
1.30 nicm 418:
419: if (events & EV_READ) {
420: if ((n = imsg_read(&client_ibuf)) == -1 || n == 0)
421: goto lost_server;
1.46 nicm 422: if (client_attached)
423: retval = client_dispatch_attached();
424: else
425: retval = client_dispatch_wait(data);
426: if (retval != 0) {
1.30 nicm 427: event_loopexit(NULL);
428: return;
1.35 nicm 429: }
1.30 nicm 430: }
1.35 nicm 431:
1.30 nicm 432: if (events & EV_WRITE) {
433: if (msgbuf_write(&client_ibuf.w) < 0)
434: goto lost_server;
435: }
436:
1.31 nicm 437: client_update_event();
1.30 nicm 438: return;
439:
440: lost_server:
1.52 nicm 441: client_exitreason = CLIENT_EXIT_LOST_SERVER;
1.32 nicm 442: client_exitval = 1;
1.30 nicm 443: event_loopexit(NULL);
444: }
445:
1.54 nicm 446: /* Callback for client stdin read events. */
447: void
448: client_stdin_callback(unused int fd, unused short events, unused void *data1)
449: {
450: struct msg_stdin_data data;
451:
452: data.size = read(STDIN_FILENO, data.data, sizeof data.data);
453: if (data.size < 0 && (errno == EINTR || errno == EAGAIN))
454: return;
455:
456: client_write_server(MSG_STDIN, &data, sizeof data);
457: if (data.size <= 0)
458: event_del(&client_stdin);
459: client_update_event();
460: }
461:
1.57 nicm 462: /* Force write to file descriptor. */
463: void
464: client_write(int fd, const char *data, size_t size)
465: {
466: ssize_t used;
467:
468: while (size != 0) {
469: used = write(fd, data, size);
470: if (used == -1) {
471: if (errno == EINTR || errno == EAGAIN)
472: continue;
473: break;
474: }
475: data += used;
476: size -= used;
477: }
478: }
479:
1.46 nicm 480: /* Dispatch imsgs when in wait state (before MSG_READY). */
481: int
1.69 ! nicm 482: client_dispatch_wait(void *data0)
1.46 nicm 483: {
1.69 ! nicm 484: struct imsg imsg;
! 485: char *data;
! 486: ssize_t n, datalen;
! 487: struct msg_stdout_data stdoutdata;
! 488: struct msg_stderr_data stderrdata;
! 489: int retval;
1.46 nicm 490:
491: for (;;) {
492: if ((n = imsg_get(&client_ibuf, &imsg)) == -1)
493: fatalx("imsg_get failed");
494: if (n == 0)
495: return (0);
1.69 ! nicm 496:
! 497: data = imsg.data;
1.46 nicm 498: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
499:
1.54 nicm 500: log_debug("got %d from server", imsg.hdr.type);
1.46 nicm 501: switch (imsg.hdr.type) {
502: case MSG_EXIT:
503: case MSG_SHUTDOWN:
1.69 ! nicm 504: if (datalen != sizeof retval && datalen != 0)
! 505: fatalx("bad MSG_EXIT size");
! 506: if (datalen == sizeof retval) {
! 507: memcpy(&retval, data, sizeof retval);
! 508: client_exitval = retval;
1.46 nicm 509: }
510: imsg_free(&imsg);
511: return (-1);
512: case MSG_READY:
513: if (datalen != 0)
514: fatalx("bad MSG_READY size");
515:
1.54 nicm 516: event_del(&client_stdin);
1.46 nicm 517: client_attached = 1;
1.65 nicm 518: client_write_server(MSG_RESIZE, NULL, 0);
1.60 nicm 519: break;
520: case MSG_STDIN:
521: if (datalen != 0)
522: fatalx("bad MSG_STDIN size");
523:
524: event_add(&client_stdin, NULL);
1.46 nicm 525: break;
1.54 nicm 526: case MSG_STDOUT:
527: if (datalen != sizeof stdoutdata)
1.69 ! nicm 528: fatalx("bad MSG_STDOUT size");
! 529: memcpy(&stdoutdata, data, sizeof stdoutdata);
1.54 nicm 530:
1.57 nicm 531: client_write(STDOUT_FILENO, stdoutdata.data, stdoutdata.size);
1.54 nicm 532: break;
533: case MSG_STDERR:
534: if (datalen != sizeof stderrdata)
1.69 ! nicm 535: fatalx("bad MSG_STDERR size");
! 536: memcpy(&stderrdata, data, sizeof stderrdata);
1.54 nicm 537:
1.57 nicm 538: client_write(STDERR_FILENO, stderrdata.data, stderrdata.size);
1.54 nicm 539: break;
1.46 nicm 540: case MSG_VERSION:
541: if (datalen != 0)
542: fatalx("bad MSG_VERSION size");
543:
1.54 nicm 544: fprintf(stderr, "protocol version mismatch "
545: "(client %u, server %u)\n", PROTOCOL_VERSION,
546: imsg.hdr.peerid);
1.46 nicm 547: client_exitval = 1;
548:
549: imsg_free(&imsg);
550: return (-1);
551: case MSG_SHELL:
1.69 ! nicm 552: if (data[datalen - 1] != '\0')
! 553: fatalx("bad MSG_SHELL string");
1.46 nicm 554:
555: clear_signals(0);
1.69 ! nicm 556: shell_exec(data, data0);
1.46 nicm 557: /* NOTREACHED */
1.56 nicm 558: case MSG_DETACH:
559: client_write_server(MSG_EXITING, NULL, 0);
560: break;
561: case MSG_EXITED:
562: imsg_free(&imsg);
563: return (-1);
1.46 nicm 564: default:
565: fatalx("unexpected message");
566: }
567:
568: imsg_free(&imsg);
569: }
570: }
571:
572: /* Dispatch imsgs in attached state (after MSG_READY). */
1.9 nicm 573: int
1.46 nicm 574: client_dispatch_attached(void)
1.9 nicm 575: {
1.69 ! nicm 576: struct imsg imsg;
! 577: struct sigaction sigact;
! 578: char *data;
! 579: ssize_t n, datalen;
1.9 nicm 580:
581: for (;;) {
1.25 nicm 582: if ((n = imsg_get(&client_ibuf, &imsg)) == -1)
1.12 nicm 583: fatalx("imsg_get failed");
584: if (n == 0)
1.9 nicm 585: return (0);
1.69 ! nicm 586:
! 587: data = imsg.data;
1.12 nicm 588: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1.9 nicm 589:
1.55 nicm 590: log_debug("got %d from server", imsg.hdr.type);
1.12 nicm 591: switch (imsg.hdr.type) {
1.48 nicm 592: case MSG_DETACHKILL:
1.9 nicm 593: case MSG_DETACH:
1.12 nicm 594: if (datalen != 0)
1.9 nicm 595: fatalx("bad MSG_DETACH size");
596:
1.48 nicm 597: client_exittype = imsg.hdr.type;
598: if (imsg.hdr.type == MSG_DETACHKILL)
1.52 nicm 599: client_exitreason = CLIENT_EXIT_DETACHED_HUP;
1.48 nicm 600: else
1.52 nicm 601: client_exitreason = CLIENT_EXIT_DETACHED;
1.25 nicm 602: client_write_server(MSG_EXITING, NULL, 0);
1.9 nicm 603: break;
604: case MSG_EXIT:
1.69 ! nicm 605: if (datalen != 0 && datalen != sizeof (int))
1.9 nicm 606: fatalx("bad MSG_EXIT size");
1.12 nicm 607:
1.25 nicm 608: client_write_server(MSG_EXITING, NULL, 0);
1.52 nicm 609: client_exitreason = CLIENT_EXIT_EXITED;
1.9 nicm 610: break;
611: case MSG_EXITED:
1.12 nicm 612: if (datalen != 0)
1.9 nicm 613: fatalx("bad MSG_EXITED size");
614:
1.12 nicm 615: imsg_free(&imsg);
1.9 nicm 616: return (-1);
617: case MSG_SHUTDOWN:
1.12 nicm 618: if (datalen != 0)
1.9 nicm 619: fatalx("bad MSG_SHUTDOWN size");
620:
1.25 nicm 621: client_write_server(MSG_EXITING, NULL, 0);
1.52 nicm 622: client_exitreason = CLIENT_EXIT_SERVER_EXITED;
1.32 nicm 623: client_exitval = 1;
1.9 nicm 624: break;
625: case MSG_SUSPEND:
1.12 nicm 626: if (datalen != 0)
1.9 nicm 627: fatalx("bad MSG_SUSPEND size");
628:
1.30 nicm 629: memset(&sigact, 0, sizeof sigact);
630: sigemptyset(&sigact.sa_mask);
631: sigact.sa_flags = SA_RESTART;
632: sigact.sa_handler = SIG_DFL;
633: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
634: fatal("sigaction failed");
635: kill(getpid(), SIGTSTP);
1.21 nicm 636: break;
637: case MSG_LOCK:
1.69 ! nicm 638: if (data[datalen - 1] != '\0')
! 639: fatalx("bad MSG_LOCK string");
1.35 nicm 640:
1.69 ! nicm 641: system(data);
1.25 nicm 642: client_write_server(MSG_UNLOCK, NULL, 0);
1.9 nicm 643: break;
644: default:
645: fatalx("unexpected message");
646: }
1.12 nicm 647:
648: imsg_free(&imsg);
1.9 nicm 649: }
1.1 nicm 650: }
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