Annotation of src/usr.bin/tmux/client.c, Revision 1.58
1.58 ! nicm 1: /* $OpenBSD: client.c,v 1.57 2012/06/18 13:34:56 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:
81: if (flock(lockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
82: while (flock(lockfd, LOCK_EX) == -1 && errno == EINTR)
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;
182: cmdflags = CMD_STARTSERVER|CMD_SENDENVIRON|CMD_CANTNEST;
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: */
191: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
192: log_warnx("%s", cause);
193: return (1);
194: }
195: cmdflags &= ~CMD_STARTSERVER;
196: TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
197: if (cmd->entry->flags & CMD_STARTSERVER)
198: cmdflags |= CMD_STARTSERVER;
199: if (cmd->entry->flags & CMD_SENDENVIRON)
200: cmdflags |= CMD_SENDENVIRON;
201: if (cmd->entry->flags & CMD_CANTNEST)
202: cmdflags |= CMD_CANTNEST;
203: }
204: cmd_list_free(cmdlist);
205: }
206:
207: /*
208: * Check if this could be a nested session, if the command can't nest:
209: * if the socket path matches $TMUX, this is probably the same server.
210: */
211: if (shell_cmd == NULL && environ_path != NULL &&
1.52 nicm 212: (cmdflags & CMD_CANTNEST) &&
213: strcmp(socket_path, environ_path) == 0) {
1.55 nicm 214: fprintf(stderr, "sessions should be nested with care, "
215: "unset $TMUX to force\n");
1.46 nicm 216: return (1);
217: }
218:
219: /* Initialise the client socket and start the server. */
220: fd = client_connect(socket_path, cmdflags & CMD_STARTSERVER);
221: if (fd == -1) {
1.55 nicm 222: fprintf(stderr, "failed to connect to server\n");
1.46 nicm 223: return (1);
224: }
225:
226: /* Set process title, log and signals now this is the client. */
227: setproctitle("client (%s)", socket_path);
228: logfile("client");
229:
230: /* Create imsg. */
1.25 nicm 231: imsg_init(&client_ibuf, fd);
1.46 nicm 232: event_set(&client_event, fd, EV_READ, client_callback, shell_cmd);
233:
1.54 nicm 234: /* Create stdin handler. */
235: setblocking(STDIN_FILENO, 0);
236: event_set(&client_stdin, STDIN_FILENO, EV_READ|EV_PERSIST,
237: client_stdin_callback, NULL);
1.56 nicm 238: if (flags & IDENTIFY_TERMIOS) {
239: if (tcgetattr(STDIN_FILENO, &saved_tio) != 0) {
240: fprintf(stderr, "tcgetattr failed: %s\n",
241: strerror(errno));
242: return (1);
243: }
244: cfmakeraw(&tio);
245: tio.c_iflag = ICRNL|IXANY;
246: tio.c_oflag = OPOST|ONLCR;
247: tio.c_lflag = NOKERNINFO;
248: tio.c_cflag = CREAD|CS8|HUPCL;
249: tio.c_cc[VMIN] = 1;
250: tio.c_cc[VTIME] = 0;
251: cfsetispeed(&tio, cfgetispeed(&saved_tio));
252: cfsetospeed(&tio, cfgetospeed(&saved_tio));
253: tcsetattr(STDIN_FILENO, TCSANOW, &tio);
254: }
1.54 nicm 255:
1.46 nicm 256: /* Establish signal handlers. */
257: set_signals(client_signal);
1.1 nicm 258:
1.46 nicm 259: /* Send initial environment. */
1.11 nicm 260: if (cmdflags & CMD_SENDENVIRON)
1.25 nicm 261: client_send_environ();
1.42 nicm 262: client_send_identify(flags);
1.1 nicm 263:
1.46 nicm 264: /* Send first command. */
265: if (msg == MSG_COMMAND) {
266: /* Fill in command line arguments. */
267: cmddata.pid = environ_pid;
268: cmddata.idx = environ_idx;
269:
270: /* Prepare command for server. */
271: cmddata.argc = argc;
272: if (cmd_pack_argv(
273: argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
1.55 nicm 274: fprintf(stderr, "command too long\n");
1.46 nicm 275: return (1);
276: }
277:
278: client_write_server(msg, &cmddata, sizeof cmddata);
279: } else if (msg == MSG_SHELL)
280: client_write_server(msg, NULL, 0);
1.1 nicm 281:
1.46 nicm 282: /* Set the event and dispatch. */
283: client_update_event();
1.54 nicm 284: event_add (&client_stdin, NULL);
1.46 nicm 285: event_dispatch();
286:
287: /* Print the exit message, if any, and exit. */
1.48 nicm 288: if (client_attached) {
1.52 nicm 289: if (client_exitreason != CLIENT_EXIT_NONE && !login_shell)
290: printf("[%s]\n", client_exit_message());
1.48 nicm 291:
292: ppid = getppid();
293: if (client_exittype == MSG_DETACHKILL && ppid > 1)
294: kill(ppid, SIGHUP);
1.56 nicm 295: } else if (flags & IDENTIFY_TERMIOS)
296: tcsetattr(STDOUT_FILENO, TCSAFLUSH, &saved_tio);
1.54 nicm 297: setblocking(STDIN_FILENO, 1);
1.46 nicm 298: return (client_exitval);
1.1 nicm 299: }
300:
1.46 nicm 301: /* Send identify message to server with the file descriptors. */
1.11 nicm 302: void
1.26 nicm 303: client_send_identify(int flags)
304: {
305: struct msg_identify_data data;
306: char *term;
307: int fd;
308:
309: data.flags = flags;
310:
311: if (getcwd(data.cwd, sizeof data.cwd) == NULL)
312: *data.cwd = '\0';
1.35 nicm 313:
1.26 nicm 314: term = getenv("TERM");
315: if (term == NULL ||
316: strlcpy(data.term, term, sizeof data.term) >= sizeof data.term)
317: *data.term = '\0';
318:
1.50 nicm 319: if ((fd = dup(STDIN_FILENO)) == -1)
320: fatal("dup failed");
321: imsg_compose(&client_ibuf,
322: MSG_IDENTIFY, PROTOCOL_VERSION, -1, fd, &data, sizeof data);
1.54 nicm 323: client_update_event();
1.26 nicm 324: }
325:
1.46 nicm 326: /* Forward entire environment to server. */
1.26 nicm 327: void
1.25 nicm 328: client_send_environ(void)
1.11 nicm 329: {
1.26 nicm 330: struct msg_environ_data data;
1.11 nicm 331: char **var;
332:
1.35 nicm 333: for (var = environ; *var != NULL; var++) {
1.11 nicm 334: if (strlcpy(data.var, *var, sizeof data.var) >= sizeof data.var)
335: continue;
1.25 nicm 336: client_write_server(MSG_ENVIRON, &data, sizeof data);
1.11 nicm 337: }
338: }
339:
1.46 nicm 340: /* Write a message to the server without a file descriptor. */
1.25 nicm 341: void
342: client_write_server(enum msgtype type, void *buf, size_t len)
343: {
1.35 nicm 344: imsg_compose(&client_ibuf, type, PROTOCOL_VERSION, -1, -1, buf, len);
1.54 nicm 345: client_update_event();
1.25 nicm 346: }
347:
1.46 nicm 348: /* Update client event based on whether it needs to read or read and write. */
1.31 nicm 349: void
350: client_update_event(void)
351: {
352: short events;
353:
354: event_del(&client_event);
355: events = EV_READ;
356: if (client_ibuf.w.queued > 0)
357: events |= EV_WRITE;
1.46 nicm 358: event_set(
359: &client_event, client_ibuf.fd, events, client_callback, shell_cmd);
1.31 nicm 360: event_add(&client_event, NULL);
361: }
362:
1.46 nicm 363: /* Callback to handle signals in the client. */
1.34 nicm 364: /* ARGSUSED */
1.30 nicm 365: void
1.31 nicm 366: client_signal(int sig, unused short events, unused void *data)
1.30 nicm 367: {
1.46 nicm 368: struct sigaction sigact;
369: int status;
1.30 nicm 370:
1.46 nicm 371: if (!client_attached) {
372: switch (sig) {
373: case SIGCHLD:
374: waitpid(WAIT_ANY, &status, WNOHANG);
375: break;
376: case SIGTERM:
377: event_loopexit(NULL);
378: break;
379: }
380: } else {
381: switch (sig) {
382: case SIGHUP:
1.52 nicm 383: client_exitreason = CLIENT_EXIT_LOST_TTY;
1.46 nicm 384: client_exitval = 1;
385: client_write_server(MSG_EXITING, NULL, 0);
386: break;
387: case SIGTERM:
1.52 nicm 388: client_exitreason = CLIENT_EXIT_TERMINATED;
1.46 nicm 389: client_exitval = 1;
390: client_write_server(MSG_EXITING, NULL, 0);
391: break;
392: case SIGWINCH:
393: client_write_server(MSG_RESIZE, NULL, 0);
394: break;
395: case SIGCONT:
396: memset(&sigact, 0, sizeof sigact);
397: sigemptyset(&sigact.sa_mask);
398: sigact.sa_flags = SA_RESTART;
399: sigact.sa_handler = SIG_IGN;
400: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
401: fatal("sigaction failed");
402: client_write_server(MSG_WAKEUP, NULL, 0);
403: break;
404: }
1.30 nicm 405: }
406:
1.31 nicm 407: client_update_event();
1.30 nicm 408: }
409:
1.46 nicm 410: /* Callback for client imsg read events. */
1.34 nicm 411: /* ARGSUSED */
1.30 nicm 412: void
1.46 nicm 413: client_callback(unused int fd, short events, void *data)
1.30 nicm 414: {
1.33 nicm 415: ssize_t n;
1.46 nicm 416: int retval;
1.30 nicm 417:
418: if (events & EV_READ) {
419: if ((n = imsg_read(&client_ibuf)) == -1 || n == 0)
420: goto lost_server;
1.46 nicm 421: if (client_attached)
422: retval = client_dispatch_attached();
423: else
424: retval = client_dispatch_wait(data);
425: if (retval != 0) {
1.30 nicm 426: event_loopexit(NULL);
427: return;
1.35 nicm 428: }
1.30 nicm 429: }
1.35 nicm 430:
1.30 nicm 431: if (events & EV_WRITE) {
432: if (msgbuf_write(&client_ibuf.w) < 0)
433: goto lost_server;
434: }
435:
1.31 nicm 436: client_update_event();
1.30 nicm 437: return;
438:
439: lost_server:
1.52 nicm 440: client_exitreason = CLIENT_EXIT_LOST_SERVER;
1.32 nicm 441: client_exitval = 1;
1.30 nicm 442: event_loopexit(NULL);
443: }
444:
1.54 nicm 445: /* Callback for client stdin read events. */
446: /* ARGSUSED */
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
482: client_dispatch_wait(void *data)
483: {
484: struct imsg imsg;
485: ssize_t n, datalen;
486: struct msg_shell_data shelldata;
487: struct msg_exit_data exitdata;
1.54 nicm 488: struct msg_stdout_data stdoutdata;
489: struct msg_stderr_data stderrdata;
1.46 nicm 490: const char *shellcmd = data;
491:
492: for (;;) {
493: if ((n = imsg_get(&client_ibuf, &imsg)) == -1)
494: fatalx("imsg_get failed");
495: if (n == 0)
496: return (0);
497: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
498:
1.54 nicm 499: log_debug("got %d from server", imsg.hdr.type);
1.46 nicm 500: switch (imsg.hdr.type) {
501: case MSG_EXIT:
502: case MSG_SHUTDOWN:
503: if (datalen != sizeof exitdata) {
504: if (datalen != 0)
505: fatalx("bad MSG_EXIT size");
506: } else {
507: memcpy(&exitdata, imsg.data, sizeof exitdata);
508: client_exitval = exitdata.retcode;
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;
518: break;
1.54 nicm 519: case MSG_STDOUT:
520: if (datalen != sizeof stdoutdata)
521: fatalx("bad MSG_STDOUT");
522: memcpy(&stdoutdata, imsg.data, sizeof stdoutdata);
523:
1.57 nicm 524: client_write(STDOUT_FILENO, stdoutdata.data, stdoutdata.size);
1.54 nicm 525: break;
526: case MSG_STDERR:
527: if (datalen != sizeof stderrdata)
528: fatalx("bad MSG_STDERR");
529: memcpy(&stderrdata, imsg.data, sizeof stderrdata);
530:
1.57 nicm 531: client_write(STDERR_FILENO, stderrdata.data, stderrdata.size);
1.54 nicm 532: break;
1.46 nicm 533: case MSG_VERSION:
534: if (datalen != 0)
535: fatalx("bad MSG_VERSION size");
536:
1.54 nicm 537: fprintf(stderr, "protocol version mismatch "
538: "(client %u, server %u)\n", PROTOCOL_VERSION,
539: imsg.hdr.peerid);
1.46 nicm 540: client_exitval = 1;
541:
542: imsg_free(&imsg);
543: return (-1);
544: case MSG_SHELL:
545: if (datalen != sizeof shelldata)
546: fatalx("bad MSG_SHELL size");
547: memcpy(&shelldata, imsg.data, sizeof shelldata);
548: shelldata.shell[(sizeof shelldata.shell) - 1] = '\0';
549:
550: clear_signals(0);
551:
552: shell_exec(shelldata.shell, shellcmd);
553: /* NOTREACHED */
1.56 nicm 554: case MSG_DETACH:
555: client_write_server(MSG_EXITING, NULL, 0);
556: break;
557: case MSG_EXITED:
558: imsg_free(&imsg);
559: return (-1);
1.46 nicm 560: default:
561: fatalx("unexpected message");
562: }
563:
564: imsg_free(&imsg);
565: }
566: }
567:
568: /* Dispatch imsgs in attached state (after MSG_READY). */
569: /* ARGSUSED */
1.9 nicm 570: int
1.46 nicm 571: client_dispatch_attached(void)
1.9 nicm 572: {
1.30 nicm 573: struct imsg imsg;
574: struct msg_lock_data lockdata;
575: struct sigaction sigact;
576: ssize_t n, datalen;
1.9 nicm 577:
578: for (;;) {
1.25 nicm 579: if ((n = imsg_get(&client_ibuf, &imsg)) == -1)
1.12 nicm 580: fatalx("imsg_get failed");
581: if (n == 0)
1.9 nicm 582: return (0);
1.12 nicm 583: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1.9 nicm 584:
1.55 nicm 585: log_debug("got %d from server", imsg.hdr.type);
1.12 nicm 586: switch (imsg.hdr.type) {
1.48 nicm 587: case MSG_DETACHKILL:
1.9 nicm 588: case MSG_DETACH:
1.12 nicm 589: if (datalen != 0)
1.9 nicm 590: fatalx("bad MSG_DETACH size");
591:
1.48 nicm 592: client_exittype = imsg.hdr.type;
593: if (imsg.hdr.type == MSG_DETACHKILL)
1.52 nicm 594: client_exitreason = CLIENT_EXIT_DETACHED_HUP;
1.48 nicm 595: else
1.52 nicm 596: client_exitreason = CLIENT_EXIT_DETACHED;
1.25 nicm 597: client_write_server(MSG_EXITING, NULL, 0);
1.9 nicm 598: break;
599: case MSG_EXIT:
1.43 nicm 600: if (datalen != 0 &&
601: datalen != sizeof (struct msg_exit_data))
1.9 nicm 602: fatalx("bad MSG_EXIT size");
1.12 nicm 603:
1.25 nicm 604: client_write_server(MSG_EXITING, NULL, 0);
1.52 nicm 605: client_exitreason = CLIENT_EXIT_EXITED;
1.9 nicm 606: break;
607: case MSG_EXITED:
1.12 nicm 608: if (datalen != 0)
1.9 nicm 609: fatalx("bad MSG_EXITED size");
610:
1.12 nicm 611: imsg_free(&imsg);
1.9 nicm 612: return (-1);
613: case MSG_SHUTDOWN:
1.12 nicm 614: if (datalen != 0)
1.9 nicm 615: fatalx("bad MSG_SHUTDOWN size");
616:
1.25 nicm 617: client_write_server(MSG_EXITING, NULL, 0);
1.52 nicm 618: client_exitreason = CLIENT_EXIT_SERVER_EXITED;
1.32 nicm 619: client_exitval = 1;
1.9 nicm 620: break;
621: case MSG_SUSPEND:
1.12 nicm 622: if (datalen != 0)
1.9 nicm 623: fatalx("bad MSG_SUSPEND size");
624:
1.30 nicm 625: memset(&sigact, 0, sizeof sigact);
626: sigemptyset(&sigact.sa_mask);
627: sigact.sa_flags = SA_RESTART;
628: sigact.sa_handler = SIG_DFL;
629: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
630: fatal("sigaction failed");
631: kill(getpid(), SIGTSTP);
1.21 nicm 632: break;
633: case MSG_LOCK:
634: if (datalen != sizeof lockdata)
635: fatalx("bad MSG_LOCK size");
636: memcpy(&lockdata, imsg.data, sizeof lockdata);
1.35 nicm 637:
1.21 nicm 638: lockdata.cmd[(sizeof lockdata.cmd) - 1] = '\0';
639: system(lockdata.cmd);
1.25 nicm 640: client_write_server(MSG_UNLOCK, NULL, 0);
1.9 nicm 641: break;
642: default:
643: fatalx("unexpected message");
644: }
1.12 nicm 645:
646: imsg_free(&imsg);
1.9 nicm 647: }
1.1 nicm 648: }
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