Annotation of src/usr.bin/tmux/client.c, Revision 1.71
1.71 ! nicm 1: /* $OpenBSD: client.c,v 1.70 2013/10/10 12:13:56 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);
1.70 nicm 56: int client_write_one(enum msgtype, int, const void *, size_t);
57: int client_write_server(enum msgtype, const 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;
1.70 nicm 168: struct msg_command_data *data;
169: int cmdflags, fd, i;
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;
1.70 nicm 174: size_t size;
1.46 nicm 175:
176: /* Set up the initial command. */
177: cmdflags = 0;
178: if (shell_cmd != NULL) {
179: msg = MSG_SHELL;
180: cmdflags = CMD_STARTSERVER;
181: } else if (argc == 0) {
182: msg = MSG_COMMAND;
1.67 nicm 183: cmdflags = CMD_STARTSERVER|CMD_CANTNEST;
1.46 nicm 184: } else {
185: msg = MSG_COMMAND;
186:
187: /*
188: * It sucks parsing the command string twice (in client and
189: * later in server) but it is necessary to get the start server
190: * flag.
191: */
1.62 nicm 192: cmdlist = cmd_list_parse(argc, argv, NULL, 0, &cause);
193: if (cmdlist == NULL) {
1.59 nicm 194: fprintf(stderr, "%s\n", cause);
1.46 nicm 195: return (1);
196: }
197: cmdflags &= ~CMD_STARTSERVER;
198: TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
199: if (cmd->entry->flags & CMD_STARTSERVER)
200: cmdflags |= CMD_STARTSERVER;
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);
1.68 nicm 238: if (flags & CLIENT_CONTROLCONTROL) {
1.56 nicm 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:
1.71 ! nicm 259: /* Send identify messages. */
1.42 nicm 260: client_send_identify(flags);
1.1 nicm 261:
1.46 nicm 262: /* Send first command. */
263: if (msg == MSG_COMMAND) {
1.70 nicm 264: /* How big is the command? */
265: size = 0;
266: for (i = 0; i < argc; i++)
267: size += strlen(argv[i]) + 1;
268: data = xmalloc((sizeof *data) + size);
269:
1.46 nicm 270: /* Fill in command line arguments. */
1.70 nicm 271: data->pid = environ_pid;
272: data->session_id = environ_session_id;
1.46 nicm 273:
274: /* Prepare command for server. */
1.70 nicm 275: data->argc = argc;
276: if (cmd_pack_argv(argc, argv, (char*)(data + 1), size) != 0) {
1.55 nicm 277: fprintf(stderr, "command too long\n");
1.70 nicm 278: free(data);
1.46 nicm 279: return (1);
280: }
1.70 nicm 281: size += sizeof *data;
1.46 nicm 282:
1.70 nicm 283: /* Send the command. */
284: if (client_write_server(msg, data, size) != 0) {
285: fprintf(stderr, "failed to send command\n");
286: free(data);
287: return (1);
288: }
289: free(data);
1.46 nicm 290: } else if (msg == MSG_SHELL)
291: client_write_server(msg, NULL, 0);
1.1 nicm 292:
1.46 nicm 293: /* Set the event and dispatch. */
294: client_update_event();
295: event_dispatch();
296:
297: /* Print the exit message, if any, and exit. */
1.48 nicm 298: if (client_attached) {
1.52 nicm 299: if (client_exitreason != CLIENT_EXIT_NONE && !login_shell)
300: printf("[%s]\n", client_exit_message());
1.48 nicm 301:
302: ppid = getppid();
303: if (client_exittype == MSG_DETACHKILL && ppid > 1)
304: kill(ppid, SIGHUP);
1.68 nicm 305: } else if (flags & CLIENT_CONTROLCONTROL) {
306: if (client_exitreason != CLIENT_EXIT_NONE)
307: printf("%%exit %s\n", client_exit_message());
308: else
309: printf("%%exit\n");
310: printf("\033\\");
1.56 nicm 311: tcsetattr(STDOUT_FILENO, TCSAFLUSH, &saved_tio);
1.63 nicm 312: }
1.54 nicm 313: setblocking(STDIN_FILENO, 1);
1.46 nicm 314: return (client_exitval);
1.1 nicm 315: }
316:
1.71 ! nicm 317: /* Send identify messages to server. */
1.11 nicm 318: void
1.26 nicm 319: client_send_identify(int flags)
320: {
1.71 ! nicm 321: const char *s;
! 322: char **ss;
! 323: int fd;
! 324:
! 325: client_write_one(MSG_IDENTIFY_FLAGS, -1, &flags, sizeof flags);
! 326:
! 327: if ((s = getenv("TERM")) == NULL)
! 328: s = "";
! 329: client_write_one(MSG_IDENTIFY_TERM, -1, s, strlen(s) + 1);
! 330:
! 331: if ((s = ttyname(STDIN_FILENO)) == NULL)
! 332: s = "";
! 333: client_write_one(MSG_IDENTIFY_TTYNAME, -1, s, strlen(s) + 1);
! 334:
! 335: if ((fd = open(".", O_RDONLY)) == -1)
! 336: fd = open("/", O_RDONLY);
! 337: client_write_one(MSG_IDENTIFY_CWD, fd, NULL, 0);
1.26 nicm 338:
1.50 nicm 339: if ((fd = dup(STDIN_FILENO)) == -1)
340: fatal("dup failed");
1.71 ! nicm 341: client_write_one(MSG_IDENTIFY_STDIN, fd, NULL, 0);
1.26 nicm 342:
1.71 ! nicm 343: for (ss = environ; *ss != NULL; ss++)
! 344: client_write_one(MSG_IDENTIFY_ENVIRON, -1, *ss, strlen(*ss) + 1);
! 345: client_write_one(MSG_IDENTIFY_DONE, -1, NULL, 0);
1.11 nicm 346:
1.71 ! nicm 347: client_update_event();
1.11 nicm 348: }
349:
1.70 nicm 350: /* Helper to send one message. */
351: int
352: client_write_one(enum msgtype type, int fd, const void *buf, size_t len)
353: {
354: int retval;
355:
356: retval = imsg_compose(&client_ibuf, type, PROTOCOL_VERSION, -1, fd,
357: (void*)buf, len);
358: if (retval != 1)
359: return (-1);
360: return (0);
361: }
362:
1.46 nicm 363: /* Write a message to the server without a file descriptor. */
1.70 nicm 364: int
365: client_write_server(enum msgtype type, const void *buf, size_t len)
1.25 nicm 366: {
1.70 nicm 367: int retval;
368:
369: retval = client_write_one(type, -1, buf, len);
370: if (retval == 0)
371: client_update_event();
372: return (retval);
1.25 nicm 373: }
374:
1.46 nicm 375: /* Update client event based on whether it needs to read or read and write. */
1.31 nicm 376: void
377: client_update_event(void)
378: {
379: short events;
380:
381: event_del(&client_event);
382: events = EV_READ;
383: if (client_ibuf.w.queued > 0)
384: events |= EV_WRITE;
1.46 nicm 385: event_set(
386: &client_event, client_ibuf.fd, events, client_callback, shell_cmd);
1.31 nicm 387: event_add(&client_event, NULL);
388: }
389:
1.46 nicm 390: /* Callback to handle signals in the client. */
1.30 nicm 391: void
1.31 nicm 392: client_signal(int sig, unused short events, unused void *data)
1.30 nicm 393: {
1.46 nicm 394: struct sigaction sigact;
395: int status;
1.30 nicm 396:
1.46 nicm 397: if (!client_attached) {
398: switch (sig) {
399: case SIGCHLD:
400: waitpid(WAIT_ANY, &status, WNOHANG);
401: break;
402: case SIGTERM:
403: event_loopexit(NULL);
404: break;
405: }
406: } else {
407: switch (sig) {
408: case SIGHUP:
1.52 nicm 409: client_exitreason = CLIENT_EXIT_LOST_TTY;
1.46 nicm 410: client_exitval = 1;
411: client_write_server(MSG_EXITING, NULL, 0);
412: break;
413: case SIGTERM:
1.52 nicm 414: client_exitreason = CLIENT_EXIT_TERMINATED;
1.46 nicm 415: client_exitval = 1;
416: client_write_server(MSG_EXITING, NULL, 0);
417: break;
418: case SIGWINCH:
419: client_write_server(MSG_RESIZE, NULL, 0);
420: break;
421: case SIGCONT:
422: memset(&sigact, 0, sizeof sigact);
423: sigemptyset(&sigact.sa_mask);
424: sigact.sa_flags = SA_RESTART;
425: sigact.sa_handler = SIG_IGN;
426: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
427: fatal("sigaction failed");
428: client_write_server(MSG_WAKEUP, NULL, 0);
429: break;
430: }
1.30 nicm 431: }
432:
1.31 nicm 433: client_update_event();
1.30 nicm 434: }
435:
1.46 nicm 436: /* Callback for client imsg read events. */
1.30 nicm 437: void
1.46 nicm 438: client_callback(unused int fd, short events, void *data)
1.30 nicm 439: {
1.33 nicm 440: ssize_t n;
1.46 nicm 441: int retval;
1.30 nicm 442:
443: if (events & EV_READ) {
444: if ((n = imsg_read(&client_ibuf)) == -1 || n == 0)
445: goto lost_server;
1.46 nicm 446: if (client_attached)
447: retval = client_dispatch_attached();
448: else
449: retval = client_dispatch_wait(data);
450: if (retval != 0) {
1.30 nicm 451: event_loopexit(NULL);
452: return;
1.35 nicm 453: }
1.30 nicm 454: }
1.35 nicm 455:
1.30 nicm 456: if (events & EV_WRITE) {
457: if (msgbuf_write(&client_ibuf.w) < 0)
458: goto lost_server;
459: }
460:
1.31 nicm 461: client_update_event();
1.30 nicm 462: return;
463:
464: lost_server:
1.52 nicm 465: client_exitreason = CLIENT_EXIT_LOST_SERVER;
1.32 nicm 466: client_exitval = 1;
1.30 nicm 467: event_loopexit(NULL);
468: }
469:
1.54 nicm 470: /* Callback for client stdin read events. */
471: void
472: client_stdin_callback(unused int fd, unused short events, unused void *data1)
473: {
474: struct msg_stdin_data data;
475:
476: data.size = read(STDIN_FILENO, data.data, sizeof data.data);
477: if (data.size < 0 && (errno == EINTR || errno == EAGAIN))
478: return;
479:
480: client_write_server(MSG_STDIN, &data, sizeof data);
481: if (data.size <= 0)
482: event_del(&client_stdin);
483: client_update_event();
484: }
485:
1.57 nicm 486: /* Force write to file descriptor. */
487: void
488: client_write(int fd, const char *data, size_t size)
489: {
490: ssize_t used;
491:
492: while (size != 0) {
493: used = write(fd, data, size);
494: if (used == -1) {
495: if (errno == EINTR || errno == EAGAIN)
496: continue;
497: break;
498: }
499: data += used;
500: size -= used;
501: }
502: }
503:
1.46 nicm 504: /* Dispatch imsgs when in wait state (before MSG_READY). */
505: int
1.69 nicm 506: client_dispatch_wait(void *data0)
1.46 nicm 507: {
1.69 nicm 508: struct imsg imsg;
509: char *data;
510: ssize_t n, datalen;
511: struct msg_stdout_data stdoutdata;
512: struct msg_stderr_data stderrdata;
513: int retval;
1.46 nicm 514:
515: for (;;) {
516: if ((n = imsg_get(&client_ibuf, &imsg)) == -1)
517: fatalx("imsg_get failed");
518: if (n == 0)
519: return (0);
1.69 nicm 520:
521: data = imsg.data;
1.46 nicm 522: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
523:
1.54 nicm 524: log_debug("got %d from server", imsg.hdr.type);
1.46 nicm 525: switch (imsg.hdr.type) {
526: case MSG_EXIT:
527: case MSG_SHUTDOWN:
1.69 nicm 528: if (datalen != sizeof retval && datalen != 0)
529: fatalx("bad MSG_EXIT size");
530: if (datalen == sizeof retval) {
531: memcpy(&retval, data, sizeof retval);
532: client_exitval = retval;
1.46 nicm 533: }
534: imsg_free(&imsg);
535: return (-1);
536: case MSG_READY:
537: if (datalen != 0)
538: fatalx("bad MSG_READY size");
539:
1.54 nicm 540: event_del(&client_stdin);
1.46 nicm 541: client_attached = 1;
1.65 nicm 542: client_write_server(MSG_RESIZE, NULL, 0);
1.60 nicm 543: break;
544: case MSG_STDIN:
545: if (datalen != 0)
546: fatalx("bad MSG_STDIN size");
547:
548: event_add(&client_stdin, NULL);
1.46 nicm 549: break;
1.54 nicm 550: case MSG_STDOUT:
551: if (datalen != sizeof stdoutdata)
1.69 nicm 552: fatalx("bad MSG_STDOUT size");
553: memcpy(&stdoutdata, data, sizeof stdoutdata);
1.54 nicm 554:
1.70 nicm 555: client_write(STDOUT_FILENO, stdoutdata.data,
556: stdoutdata.size);
1.54 nicm 557: break;
558: case MSG_STDERR:
559: if (datalen != sizeof stderrdata)
1.69 nicm 560: fatalx("bad MSG_STDERR size");
561: memcpy(&stderrdata, data, sizeof stderrdata);
1.54 nicm 562:
1.70 nicm 563: client_write(STDERR_FILENO, stderrdata.data,
564: stderrdata.size);
1.54 nicm 565: break;
1.46 nicm 566: case MSG_VERSION:
567: if (datalen != 0)
568: fatalx("bad MSG_VERSION size");
569:
1.54 nicm 570: fprintf(stderr, "protocol version mismatch "
571: "(client %u, server %u)\n", PROTOCOL_VERSION,
572: imsg.hdr.peerid);
1.46 nicm 573: client_exitval = 1;
574:
575: imsg_free(&imsg);
576: return (-1);
577: case MSG_SHELL:
1.69 nicm 578: if (data[datalen - 1] != '\0')
579: fatalx("bad MSG_SHELL string");
1.46 nicm 580:
581: clear_signals(0);
1.69 nicm 582: shell_exec(data, data0);
1.46 nicm 583: /* NOTREACHED */
1.56 nicm 584: case MSG_DETACH:
585: client_write_server(MSG_EXITING, NULL, 0);
586: break;
587: case MSG_EXITED:
588: imsg_free(&imsg);
589: return (-1);
1.46 nicm 590: }
591:
592: imsg_free(&imsg);
593: }
594: }
595:
596: /* Dispatch imsgs in attached state (after MSG_READY). */
1.9 nicm 597: int
1.46 nicm 598: client_dispatch_attached(void)
1.9 nicm 599: {
1.69 nicm 600: struct imsg imsg;
601: struct sigaction sigact;
602: char *data;
603: ssize_t n, datalen;
1.9 nicm 604:
605: for (;;) {
1.25 nicm 606: if ((n = imsg_get(&client_ibuf, &imsg)) == -1)
1.12 nicm 607: fatalx("imsg_get failed");
608: if (n == 0)
1.9 nicm 609: return (0);
1.69 nicm 610:
611: data = imsg.data;
1.12 nicm 612: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1.9 nicm 613:
1.55 nicm 614: log_debug("got %d from server", imsg.hdr.type);
1.12 nicm 615: switch (imsg.hdr.type) {
1.48 nicm 616: case MSG_DETACHKILL:
1.9 nicm 617: case MSG_DETACH:
1.12 nicm 618: if (datalen != 0)
1.9 nicm 619: fatalx("bad MSG_DETACH size");
620:
1.48 nicm 621: client_exittype = imsg.hdr.type;
622: if (imsg.hdr.type == MSG_DETACHKILL)
1.52 nicm 623: client_exitreason = CLIENT_EXIT_DETACHED_HUP;
1.48 nicm 624: else
1.52 nicm 625: client_exitreason = CLIENT_EXIT_DETACHED;
1.25 nicm 626: client_write_server(MSG_EXITING, NULL, 0);
1.9 nicm 627: break;
628: case MSG_EXIT:
1.69 nicm 629: if (datalen != 0 && datalen != sizeof (int))
1.9 nicm 630: fatalx("bad MSG_EXIT size");
1.12 nicm 631:
1.25 nicm 632: client_write_server(MSG_EXITING, NULL, 0);
1.52 nicm 633: client_exitreason = CLIENT_EXIT_EXITED;
1.9 nicm 634: break;
635: case MSG_EXITED:
1.12 nicm 636: if (datalen != 0)
1.9 nicm 637: fatalx("bad MSG_EXITED size");
638:
1.12 nicm 639: imsg_free(&imsg);
1.9 nicm 640: return (-1);
641: case MSG_SHUTDOWN:
1.12 nicm 642: if (datalen != 0)
1.9 nicm 643: fatalx("bad MSG_SHUTDOWN size");
644:
1.25 nicm 645: client_write_server(MSG_EXITING, NULL, 0);
1.52 nicm 646: client_exitreason = CLIENT_EXIT_SERVER_EXITED;
1.32 nicm 647: client_exitval = 1;
1.9 nicm 648: break;
649: case MSG_SUSPEND:
1.12 nicm 650: if (datalen != 0)
1.9 nicm 651: fatalx("bad MSG_SUSPEND size");
652:
1.30 nicm 653: memset(&sigact, 0, sizeof sigact);
654: sigemptyset(&sigact.sa_mask);
655: sigact.sa_flags = SA_RESTART;
656: sigact.sa_handler = SIG_DFL;
657: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
658: fatal("sigaction failed");
659: kill(getpid(), SIGTSTP);
1.21 nicm 660: break;
661: case MSG_LOCK:
1.69 nicm 662: if (data[datalen - 1] != '\0')
663: fatalx("bad MSG_LOCK string");
1.35 nicm 664:
1.69 nicm 665: system(data);
1.25 nicm 666: client_write_server(MSG_UNLOCK, NULL, 0);
1.9 nicm 667: break;
668: }
1.12 nicm 669:
670: imsg_free(&imsg);
1.9 nicm 671: }
1.1 nicm 672: }
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