Annotation of src/usr.bin/tmux/tmux.c, Revision 1.51
1.51 ! nicm 1: /* $OpenBSD: tmux.c,v 1.50 2009/10/21 20:11:47 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>
21:
22: #include <errno.h>
23: #include <paths.h>
24: #include <pwd.h>
25: #include <signal.h>
26: #include <stdlib.h>
27: #include <string.h>
28: #include <syslog.h>
29: #include <unistd.h>
30:
31: #include "tmux.h"
32:
33: #ifdef DEBUG
34: const char *malloc_options = "AFGJPX";
35: #endif
36:
37: volatile sig_atomic_t sigwinch;
38: volatile sig_atomic_t sigterm;
39: volatile sig_atomic_t sigcont;
40: volatile sig_atomic_t sigchld;
41: volatile sig_atomic_t sigusr1;
42: volatile sig_atomic_t sigusr2;
43:
44: char *cfg_file;
1.12 nicm 45: struct options global_s_options; /* session options */
46: struct options global_w_options; /* window options */
1.29 nicm 47: struct environ global_environ;
1.1 nicm 48:
49: int debug_level;
50: int be_quiet;
51: time_t start_time;
52: char *socket_path;
1.41 nicm 53: int login_shell;
1.1 nicm 54:
55: __dead void usage(void);
1.50 nicm 56: void fill_session(struct msg_command_data *);
1.1 nicm 57: char *makesockpath(const char *);
1.50 nicm 58: int dispatch_imsg(struct imsgbuf *, const char *, int *);
1.46 nicm 59: __dead void shell_exec(const char *, const char *);
1.1 nicm 60:
61: __dead void
62: usage(void)
63: {
1.4 sobrado 64: fprintf(stderr,
1.46 nicm 65: "usage: %s [-28dlquv] [-c shell-command] [-f file] [-L socket-name]\n"
1.41 nicm 66: " [-S socket-path] [command [flags]]\n",
1.1 nicm 67: __progname);
68: exit(1);
69: }
70:
71: void
72: logfile(const char *name)
73: {
74: char *path;
75:
76: log_close();
77: if (debug_level > 0) {
1.32 nicm 78: xasprintf(&path, "tmux-%s-%ld.log", name, (long) getpid());
1.1 nicm 79: log_open_file(debug_level, path);
80: xfree(path);
81: }
82: }
83:
84: void
85: sighandler(int sig)
86: {
87: int saved_errno;
88:
89: saved_errno = errno;
90: switch (sig) {
91: case SIGWINCH:
92: sigwinch = 1;
93: break;
94: case SIGTERM:
95: sigterm = 1;
96: break;
97: case SIGCHLD:
98: sigchld = 1;
99: break;
100: case SIGCONT:
101: sigcont = 1;
102: break;
103: case SIGUSR1:
104: sigusr1 = 1;
105: break;
106: case SIGUSR2:
107: sigusr2 = 1;
108: break;
109: }
110: errno = saved_errno;
111: }
112:
113: void
114: siginit(void)
115: {
116: struct sigaction act;
117:
118: memset(&act, 0, sizeof act);
119: sigemptyset(&act.sa_mask);
120: act.sa_flags = SA_RESTART;
121:
122: act.sa_handler = SIG_IGN;
123: if (sigaction(SIGPIPE, &act, NULL) != 0)
124: fatal("sigaction failed");
125: if (sigaction(SIGINT, &act, NULL) != 0)
126: fatal("sigaction failed");
127: if (sigaction(SIGTSTP, &act, NULL) != 0)
128: fatal("sigaction failed");
129: if (sigaction(SIGQUIT, &act, NULL) != 0)
130: fatal("sigaction failed");
131:
132: act.sa_handler = sighandler;
133: if (sigaction(SIGWINCH, &act, NULL) != 0)
134: fatal("sigaction failed");
135: if (sigaction(SIGTERM, &act, NULL) != 0)
136: fatal("sigaction failed");
137: if (sigaction(SIGCHLD, &act, NULL) != 0)
138: fatal("sigaction failed");
139: if (sigaction(SIGUSR1, &act, NULL) != 0)
140: fatal("sigaction failed");
141: if (sigaction(SIGUSR2, &act, NULL) != 0)
142: fatal("sigaction failed");
143: }
144:
145: void
146: sigreset(void)
147: {
148: struct sigaction act;
149:
150: memset(&act, 0, sizeof act);
151: sigemptyset(&act.sa_mask);
152:
153: act.sa_handler = SIG_DFL;
154: if (sigaction(SIGPIPE, &act, NULL) != 0)
155: fatal("sigaction failed");
156: if (sigaction(SIGUSR1, &act, NULL) != 0)
157: fatal("sigaction failed");
158: if (sigaction(SIGUSR2, &act, NULL) != 0)
159: fatal("sigaction failed");
160: if (sigaction(SIGINT, &act, NULL) != 0)
161: fatal("sigaction failed");
162: if (sigaction(SIGTSTP, &act, NULL) != 0)
163: fatal("sigaction failed");
164: if (sigaction(SIGQUIT, &act, NULL) != 0)
165: fatal("sigaction failed");
166: if (sigaction(SIGWINCH, &act, NULL) != 0)
167: fatal("sigaction failed");
168: if (sigaction(SIGTERM, &act, NULL) != 0)
169: fatal("sigaction failed");
170: if (sigaction(SIGCHLD, &act, NULL) != 0)
171: fatal("sigaction failed");
172: }
173:
1.39 nicm 174: const char *
175: getshell(void)
176: {
177: struct passwd *pw;
178: const char *shell;
179:
180: shell = getenv("SHELL");
181: if (checkshell(shell))
182: return (shell);
183:
184: pw = getpwuid(getuid());
185: if (pw != NULL && checkshell(pw->pw_shell))
186: return (pw->pw_shell);
187:
188: return (_PATH_BSHELL);
189: }
190:
191: int
192: checkshell(const char *shell)
193: {
194: if (shell == NULL || *shell == '\0' || areshell(shell))
195: return (0);
196: if (access(shell, X_OK) != 0)
197: return (0);
198: return (1);
199: }
200:
201: int
202: areshell(const char *shell)
203: {
204: const char *progname, *ptr;
205:
206: if ((ptr = strrchr(shell, '/')) != NULL)
207: ptr++;
208: else
209: ptr = shell;
210: progname = __progname;
211: if (*progname == '-')
212: progname++;
213: if (strcmp(ptr, progname) == 0)
214: return (1);
215: return (0);
216: }
217:
1.50 nicm 218: void
219: fill_session(struct msg_command_data *data)
220: {
221: char *env, *ptr1, *ptr2, buf[256];
222: size_t len;
223: const char *errstr;
224: long long ll;
225:
226: data->pid = -1;
227: if ((env = getenv("TMUX")) == NULL)
228: return;
229:
230: if ((ptr2 = strrchr(env, ',')) == NULL || ptr2 == env)
231: return;
232: for (ptr1 = ptr2 - 1; ptr1 > env && *ptr1 != ','; ptr1--)
233: ;
234: if (*ptr1 != ',')
235: return;
236: ptr1++;
237: ptr2++;
238:
239: len = ptr2 - ptr1 - 1;
240: if (len > (sizeof buf) - 1)
241: return;
242: memcpy(buf, ptr1, len);
243: buf[len] = '\0';
244:
245: ll = strtonum(buf, 0, LONG_MAX, &errstr);
246: if (errstr != NULL)
247: return;
248: data->pid = ll;
249:
250: ll = strtonum(ptr2, 0, UINT_MAX, &errstr);
251: if (errstr != NULL)
252: return;
253: data->idx = ll;
254: }
255:
1.1 nicm 256: char *
257: makesockpath(const char *label)
258: {
259: char base[MAXPATHLEN], *path;
260: struct stat sb;
261: u_int uid;
262:
263: uid = getuid();
1.32 nicm 264: xsnprintf(base, MAXPATHLEN, "%s/tmux-%d", _PATH_TMP, uid);
1.1 nicm 265:
266: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
267: return (NULL);
268:
269: if (lstat(base, &sb) != 0)
270: return (NULL);
271: if (!S_ISDIR(sb.st_mode)) {
272: errno = ENOTDIR;
273: return (NULL);
274: }
275: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
276: errno = EACCES;
277: return (NULL);
278: }
279:
280: xasprintf(&path, "%s/%s", base, label);
281: return (path);
282: }
283:
284: int
285: main(int argc, char **argv)
286: {
1.51 ! nicm 287: struct cmd_list *cmdlist;
! 288: struct cmd *cmd;
! 289: struct pollfd pfd;
! 290: enum msgtype msg;
! 291: struct passwd *pw;
! 292: struct options *so, *wo;
! 293: struct keylist *keylist;
! 294: struct imsgbuf *ibuf;
! 295: struct msg_command_data cmddata;
! 296: char *s, *shellcmd, *path, *label, *home, *cause;
! 297: char cwd[MAXPATHLEN], **var;
! 298: void *buf;
! 299: size_t len;
! 300: int nfds, retcode, opt, flags, cmdflags = 0;
1.1 nicm 301:
1.45 nicm 302: flags = 0;
1.46 nicm 303: shellcmd = label = path = NULL;
1.41 nicm 304: login_shell = (**argv == '-');
1.46 nicm 305: while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUv")) != -1) {
1.41 nicm 306: switch (opt) {
1.1 nicm 307: case '2':
308: flags |= IDENTIFY_256COLOURS;
309: flags &= ~IDENTIFY_88COLOURS;
310: break;
311: case '8':
312: flags |= IDENTIFY_88COLOURS;
313: flags &= ~IDENTIFY_256COLOURS;
314: break;
1.46 nicm 315: case 'c':
316: if (shellcmd != NULL)
317: xfree(shellcmd);
318: shellcmd = xstrdup(optarg);
319: break;
1.37 nicm 320: case 'd':
321: flags |= IDENTIFY_HASDEFAULTS;
322: break;
1.1 nicm 323: case 'f':
1.42 nicm 324: if (cfg_file != NULL)
1.2 ray 325: xfree(cfg_file);
1.1 nicm 326: cfg_file = xstrdup(optarg);
1.41 nicm 327: break;
328: case 'l':
329: login_shell = 1;
1.1 nicm 330: break;
331: case 'L':
332: if (label != NULL)
333: xfree(label);
334: label = xstrdup(optarg);
335: break;
1.37 nicm 336: case 'q':
337: be_quiet = 1;
338: break;
1.1 nicm 339: case 'S':
340: if (path != NULL)
341: xfree(path);
342: path = xstrdup(optarg);
343: break;
344: case 'u':
345: flags |= IDENTIFY_UTF8;
346: break;
347: case 'v':
348: debug_level++;
349: break;
350: default:
351: usage();
352: }
353: }
354: argc -= optind;
355: argv += optind;
356:
1.46 nicm 357: if (shellcmd != NULL && argc != 0)
358: usage();
359:
1.1 nicm 360: log_open_tty(debug_level);
361: siginit();
362:
1.15 nicm 363: if (!(flags & IDENTIFY_UTF8)) {
364: /*
365: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
366: * exist (in that order) to contain UTF-8, it is a safe
367: * assumption that either they are using a UTF-8 terminal, or
368: * if not they know that output from UTF-8-capable programs may
369: * be wrong.
370: */
371: if ((s = getenv("LC_ALL")) == NULL) {
372: if ((s = getenv("LC_CTYPE")) == NULL)
373: s = getenv("LANG");
374: }
1.26 nicm 375: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
376: strcasestr(s, "UTF8") != NULL))
1.15 nicm 377: flags |= IDENTIFY_UTF8;
378: }
379:
1.42 nicm 380: environ_init(&global_environ);
381: for (var = environ; *var != NULL; var++)
382: environ_put(&global_environ, *var);
383:
1.12 nicm 384: options_init(&global_s_options, NULL);
1.42 nicm 385: so = &global_s_options;
386: options_set_number(so, "base-index", 0);
387: options_set_number(so, "bell-action", BELL_ANY);
388: options_set_number(so, "buffer-limit", 9);
389: options_set_string(so, "default-command", "%s", "");
390: options_set_string(so, "default-shell", "%s", getshell());
391: options_set_string(so, "default-terminal", "screen");
392: options_set_number(so, "display-panes-colour", 4);
393: options_set_number(so, "display-panes-time", 1000);
394: options_set_number(so, "display-time", 750);
395: options_set_number(so, "history-limit", 2000);
396: options_set_number(so, "lock-after-time", 0);
1.45 nicm 397: options_set_string(so, "lock-command", "lock -np");
1.48 nicm 398: options_set_number(so, "lock-server", 1);
1.42 nicm 399: options_set_number(so, "message-attr", 0);
400: options_set_number(so, "message-bg", 3);
401: options_set_number(so, "message-fg", 0);
1.49 nicm 402: options_set_number(so, "mouse-select-pane", 0);
1.42 nicm 403: options_set_number(so, "repeat-time", 500);
404: options_set_number(so, "set-remain-on-exit", 0);
405: options_set_number(so, "set-titles", 0);
1.43 nicm 406: options_set_string(so, "set-titles-string", "#S:#I:#W - \"#T\"");
1.42 nicm 407: options_set_number(so, "status", 1);
408: options_set_number(so, "status-attr", 0);
409: options_set_number(so, "status-bg", 2);
410: options_set_number(so, "status-fg", 0);
411: options_set_number(so, "status-interval", 15);
412: options_set_number(so, "status-justify", 0);
413: options_set_number(so, "status-keys", MODEKEY_EMACS);
414: options_set_string(so, "status-left", "[#S]");
415: options_set_number(so, "status-left-attr", 0);
416: options_set_number(so, "status-left-bg", 8);
417: options_set_number(so, "status-left-fg", 8);
418: options_set_number(so, "status-left-length", 10);
419: options_set_string(so, "status-right", "\"#22T\" %%H:%%M %%d-%%b-%%y");
420: options_set_number(so, "status-right-attr", 0);
421: options_set_number(so, "status-right-bg", 8);
422: options_set_number(so, "status-right-fg", 8);
423: options_set_number(so, "status-right-length", 40);
424: options_set_string(so, "terminal-overrides",
425: "*88col*:colors=88,*256col*:colors=256");
426: options_set_string(so, "update-environment", "DISPLAY "
1.35 nicm 427: "WINDOWID SSH_ASKPASS SSH_AUTH_SOCK SSH_AGENT_PID SSH_CONNECTION");
1.42 nicm 428: options_set_number(so, "visual-activity", 0);
429: options_set_number(so, "visual-bell", 0);
430: options_set_number(so, "visual-content", 0);
1.44 nicm 431:
432: keylist = xmalloc(sizeof *keylist);
433: ARRAY_INIT(keylist);
434: ARRAY_ADD(keylist, '\002');
435: options_set_data(so, "prefix", keylist, xfree);
1.1 nicm 436:
1.12 nicm 437: options_init(&global_w_options, NULL);
1.42 nicm 438: wo = &global_w_options;
439: options_set_number(wo, "aggressive-resize", 0);
440: options_set_number(wo, "automatic-rename", 1);
441: options_set_number(wo, "clock-mode-colour", 4);
442: options_set_number(wo, "clock-mode-style", 1);
443: options_set_number(wo, "force-height", 0);
444: options_set_number(wo, "force-width", 0);
445: options_set_number(wo, "main-pane-height", 24);
446: options_set_number(wo, "main-pane-width", 81);
447: options_set_number(wo, "mode-attr", 0);
448: options_set_number(wo, "mode-bg", 3);
449: options_set_number(wo, "mode-fg", 0);
450: options_set_number(wo, "mode-keys", MODEKEY_EMACS);
451: options_set_number(wo, "mode-mouse", 0);
452: options_set_number(wo, "monitor-activity", 0);
453: options_set_string(wo, "monitor-content", "%s", "");
454: options_set_number(wo, "window-status-attr", 0);
455: options_set_number(wo, "window-status-bg", 8);
456: options_set_number(wo, "window-status-current-attr", 0);
457: options_set_number(wo, "window-status-current-bg", 8);
458: options_set_number(wo, "window-status-current-fg", 8);
459: options_set_number(wo, "window-status-fg", 8);
460: options_set_number(wo, "xterm-keys", 0);
461: options_set_number(wo, "remain-on-exit", 0);
1.47 nicm 462: options_set_number(wo, "synchronize-panes", 0);
1.42 nicm 463:
464: if (flags & IDENTIFY_UTF8) {
465: options_set_number(so, "status-utf8", 1);
466: options_set_number(wo, "utf8", 1);
467: } else {
468: options_set_number(so, "status-utf8", 0);
469: options_set_number(wo, "utf8", 0);
470: }
471:
472: if (getcwd(cwd, sizeof cwd) == NULL) {
473: pw = getpwuid(getuid());
474: if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
475: strlcpy(cwd, pw->pw_dir, sizeof cwd);
476: else
477: strlcpy(cwd, "/", sizeof cwd);
478: }
479: options_set_string(so, "default-path", "%s", cwd);
1.1 nicm 480:
481: if (cfg_file == NULL) {
482: home = getenv("HOME");
483: if (home == NULL || *home == '\0') {
484: pw = getpwuid(getuid());
485: if (pw != NULL)
486: home = pw->pw_dir;
487: }
488: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
489: if (access(cfg_file, R_OK) != 0) {
490: xfree(cfg_file);
491: cfg_file = NULL;
492: }
493: } else {
494: if (access(cfg_file, R_OK) != 0) {
495: log_warn("%s", cfg_file);
496: exit(1);
497: }
498: }
1.21 nicm 499:
1.1 nicm 500: if (label == NULL)
501: label = xstrdup("default");
502: if (path == NULL && (path = makesockpath(label)) == NULL) {
503: log_warn("can't create socket");
504: exit(1);
505: }
506: xfree(label);
507:
1.46 nicm 508: if (shellcmd != NULL) {
509: msg = MSG_SHELL;
510: buf = NULL;
511: len = 0;
1.51 ! nicm 512: } else {
! 513: fill_session(&cmddata);
! 514:
! 515: cmddata.argc = argc;
! 516: if (cmd_pack_argv(
! 517: argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
! 518: log_warnx("command too long");
! 519: exit(1);
! 520: }
! 521:
! 522: msg = MSG_COMMAND;
! 523: buf = &cmddata;
! 524: len = sizeof cmddata;
! 525: }
1.21 nicm 526:
1.46 nicm 527: if (shellcmd != NULL)
528: cmdflags |= CMD_STARTSERVER;
529: else if (argc == 0) /* new-session is the default */
1.30 nicm 530: cmdflags |= CMD_STARTSERVER|CMD_SENDENVIRON;
1.21 nicm 531: else {
532: /*
533: * It sucks parsing the command string twice (in client and
534: * later in server) but it is necessary to get the start server
535: * flag.
536: */
537: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
538: log_warnx("%s", cause);
539: exit(1);
1.1 nicm 540: }
1.21 nicm 541: cmdflags &= ~CMD_STARTSERVER;
1.1 nicm 542: TAILQ_FOREACH(cmd, cmdlist, qentry) {
1.29 nicm 543: if (cmd->entry->flags & CMD_STARTSERVER)
1.20 nicm 544: cmdflags |= CMD_STARTSERVER;
1.29 nicm 545: if (cmd->entry->flags & CMD_SENDENVIRON)
546: cmdflags |= CMD_SENDENVIRON;
1.1 nicm 547: }
1.21 nicm 548: cmd_list_free(cmdlist);
1.1 nicm 549: }
550:
1.50 nicm 551: if ((ibuf = client_init(path, cmdflags, flags)) == NULL)
1.1 nicm 552: exit(1);
553: xfree(path);
554:
1.50 nicm 555: imsg_compose(ibuf, msg, PROTOCOL_VERSION, -1, -1, buf, len);
1.1 nicm 556:
557: retcode = 0;
558: for (;;) {
1.50 nicm 559: pfd.fd = ibuf->fd;
1.1 nicm 560: pfd.events = POLLIN;
1.50 nicm 561: if (ibuf->w.queued != 0)
1.1 nicm 562: pfd.events |= POLLOUT;
563:
1.31 nicm 564: if ((nfds = poll(&pfd, 1, INFTIM)) == -1) {
1.1 nicm 565: if (errno == EAGAIN || errno == EINTR)
566: continue;
567: fatal("poll failed");
568: }
1.31 nicm 569: if (nfds == 0)
570: continue;
571:
572: if (pfd.revents & (POLLERR|POLLHUP|POLLNVAL))
573: fatalx("socket error");
574:
575: if (pfd.revents & POLLIN) {
1.50 nicm 576: if (dispatch_imsg(ibuf, shellcmd, &retcode) != 0)
1.31 nicm 577: break;
578: }
579:
580: if (pfd.revents & POLLOUT) {
1.50 nicm 581: if (msgbuf_write(&ibuf->w) < 0)
1.31 nicm 582: fatalx("msgbuf_write failed");
583: }
584: }
585:
586: options_free(&global_s_options);
587: options_free(&global_w_options);
588:
589: return (retcode);
590: }
591:
592: int
1.50 nicm 593: dispatch_imsg(struct imsgbuf *ibuf, const char *shellcmd, int *retcode)
1.31 nicm 594: {
595: struct imsg imsg;
596: ssize_t n, datalen;
597: struct msg_print_data printdata;
1.46 nicm 598: struct msg_shell_data shelldata;
1.1 nicm 599:
1.50 nicm 600: if ((n = imsg_read(ibuf)) == -1 || n == 0)
1.31 nicm 601: fatalx("imsg_read failed");
1.1 nicm 602:
1.31 nicm 603: for (;;) {
1.50 nicm 604: if ((n = imsg_get(ibuf, &imsg)) == -1)
1.31 nicm 605: fatalx("imsg_get failed");
606: if (n == 0)
607: return (0);
608: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1.1 nicm 609:
1.31 nicm 610: switch (imsg.hdr.type) {
1.1 nicm 611: case MSG_EXIT:
612: case MSG_SHUTDOWN:
1.31 nicm 613: if (datalen != 0)
614: fatalx("bad MSG_EXIT size");
615:
616: return (-1);
1.1 nicm 617: case MSG_ERROR:
1.31 nicm 618: *retcode = 1;
1.1 nicm 619: /* FALLTHROUGH */
620: case MSG_PRINT:
1.31 nicm 621: if (datalen != sizeof printdata)
1.1 nicm 622: fatalx("bad MSG_PRINT size");
1.31 nicm 623: memcpy(&printdata, imsg.data, sizeof printdata);
624: printdata.msg[(sizeof printdata.msg) - 1] = '\0';
1.21 nicm 625:
626: log_info("%s", printdata.msg);
1.31 nicm 627: break;
1.1 nicm 628: case MSG_READY:
1.31 nicm 629: if (datalen != 0)
630: fatalx("bad MSG_READY size");
631:
1.50 nicm 632: client_main(); /* doesn't return */
1.31 nicm 633: case MSG_VERSION:
634: if (datalen != 0)
635: fatalx("bad MSG_VERSION size");
636:
637: log_warnx("protocol version mismatch (client %u, "
638: "server %u)", PROTOCOL_VERSION, imsg.hdr.peerid);
639: *retcode = 1;
640: return (-1);
1.46 nicm 641: case MSG_SHELL:
642: if (datalen != sizeof shelldata)
643: fatalx("bad MSG_SHELL size");
644: memcpy(&shelldata, imsg.data, sizeof shelldata);
645: shelldata.shell[(sizeof shelldata.shell) - 1] = '\0';
646:
647: shell_exec(shelldata.shell, shellcmd);
1.1 nicm 648: default:
1.31 nicm 649: fatalx("unexpected message");
1.1 nicm 650: }
1.31 nicm 651:
652: imsg_free(&imsg);
1.1 nicm 653: }
1.46 nicm 654: }
655:
656: __dead void
657: shell_exec(const char *shell, const char *shellcmd)
658: {
659: const char *shellname, *ptr;
660: char *argv0;
661:
662: sigreset();
663:
664: ptr = strrchr(shell, '/');
665: if (ptr != NULL && *(ptr + 1) != '\0')
666: shellname = ptr + 1;
667: else
668: shellname = shell;
669: if (login_shell)
670: xasprintf(&argv0, "-%s", shellname);
671: else
672: xasprintf(&argv0, "%s", shellname);
673: setenv("SHELL", shell, 1);
674:
675: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
676: fatal("execl failed");
1.1 nicm 677: }
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