Annotation of src/usr.bin/tmux/tmux.c, Revision 1.48
1.48 ! nicm 1: /* $OpenBSD: tmux.c,v 1.47 2009/10/09 07:27:00 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);
56: char *makesockpath(const char *);
1.23 nicm 57: int prepare_cmd(enum msgtype *, void **, size_t *, int, char **);
1.46 nicm 58: int dispatch_imsg(struct client_ctx *, const char *, int *);
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:
1.1 nicm 218: char *
219: makesockpath(const char *label)
220: {
221: char base[MAXPATHLEN], *path;
222: struct stat sb;
223: u_int uid;
224:
225: uid = getuid();
1.32 nicm 226: xsnprintf(base, MAXPATHLEN, "%s/tmux-%d", _PATH_TMP, uid);
1.1 nicm 227:
228: if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
229: return (NULL);
230:
231: if (lstat(base, &sb) != 0)
232: return (NULL);
233: if (!S_ISDIR(sb.st_mode)) {
234: errno = ENOTDIR;
235: return (NULL);
236: }
237: if (sb.st_uid != uid || (sb.st_mode & (S_IRWXG|S_IRWXO)) != 0) {
238: errno = EACCES;
239: return (NULL);
240: }
241:
242: xasprintf(&path, "%s/%s", base, label);
243: return (path);
244: }
245:
246: int
1.23 nicm 247: prepare_cmd(enum msgtype *msg, void **buf, size_t *len, int argc, char **argv)
1.21 nicm 248: {
249: static struct msg_command_data cmddata;
250:
251: client_fill_session(&cmddata);
252:
253: cmddata.argc = argc;
254: if (cmd_pack_argv(argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
255: log_warnx("command too long");
256: return (-1);
257: }
258:
259: *buf = &cmddata;
260: *len = sizeof cmddata;
261:
262: *msg = MSG_COMMAND;
263: return (0);
264: }
265:
266: int
1.1 nicm 267: main(int argc, char **argv)
268: {
269: struct client_ctx cctx;
270: struct cmd_list *cmdlist;
271: struct cmd *cmd;
272: struct pollfd pfd;
1.23 nicm 273: enum msgtype msg;
1.1 nicm 274: struct passwd *pw;
1.42 nicm 275: struct options *so, *wo;
1.44 nicm 276: struct keylist *keylist;
1.46 nicm 277: char *s, *shellcmd, *path, *label, *home, *cause;
278: char cwd[MAXPATHLEN], **var;
1.21 nicm 279: void *buf;
280: size_t len;
1.45 nicm 281: int retcode, opt, flags, cmdflags = 0;
1.31 nicm 282: int nfds;
1.1 nicm 283:
1.45 nicm 284: flags = 0;
1.46 nicm 285: shellcmd = label = path = NULL;
1.41 nicm 286: login_shell = (**argv == '-');
1.46 nicm 287: while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUv")) != -1) {
1.41 nicm 288: switch (opt) {
1.1 nicm 289: case '2':
290: flags |= IDENTIFY_256COLOURS;
291: flags &= ~IDENTIFY_88COLOURS;
292: break;
293: case '8':
294: flags |= IDENTIFY_88COLOURS;
295: flags &= ~IDENTIFY_256COLOURS;
296: break;
1.46 nicm 297: case 'c':
298: if (shellcmd != NULL)
299: xfree(shellcmd);
300: shellcmd = xstrdup(optarg);
301: break;
1.37 nicm 302: case 'd':
303: flags |= IDENTIFY_HASDEFAULTS;
304: break;
1.1 nicm 305: case 'f':
1.42 nicm 306: if (cfg_file != NULL)
1.2 ray 307: xfree(cfg_file);
1.1 nicm 308: cfg_file = xstrdup(optarg);
1.41 nicm 309: break;
310: case 'l':
311: login_shell = 1;
1.1 nicm 312: break;
313: case 'L':
314: if (label != NULL)
315: xfree(label);
316: label = xstrdup(optarg);
317: break;
1.37 nicm 318: case 'q':
319: be_quiet = 1;
320: break;
1.1 nicm 321: case 'S':
322: if (path != NULL)
323: xfree(path);
324: path = xstrdup(optarg);
325: break;
326: case 'u':
327: flags |= IDENTIFY_UTF8;
328: break;
329: case 'v':
330: debug_level++;
331: break;
332: default:
333: usage();
334: }
335: }
336: argc -= optind;
337: argv += optind;
338:
1.46 nicm 339: if (shellcmd != NULL && argc != 0)
340: usage();
341:
1.1 nicm 342: log_open_tty(debug_level);
343: siginit();
344:
1.15 nicm 345: if (!(flags & IDENTIFY_UTF8)) {
346: /*
347: * If the user has set whichever of LC_ALL, LC_CTYPE or LANG
348: * exist (in that order) to contain UTF-8, it is a safe
349: * assumption that either they are using a UTF-8 terminal, or
350: * if not they know that output from UTF-8-capable programs may
351: * be wrong.
352: */
353: if ((s = getenv("LC_ALL")) == NULL) {
354: if ((s = getenv("LC_CTYPE")) == NULL)
355: s = getenv("LANG");
356: }
1.26 nicm 357: if (s != NULL && (strcasestr(s, "UTF-8") != NULL ||
358: strcasestr(s, "UTF8") != NULL))
1.15 nicm 359: flags |= IDENTIFY_UTF8;
360: }
361:
1.42 nicm 362: environ_init(&global_environ);
363: for (var = environ; *var != NULL; var++)
364: environ_put(&global_environ, *var);
365:
1.12 nicm 366: options_init(&global_s_options, NULL);
1.42 nicm 367: so = &global_s_options;
368: options_set_number(so, "base-index", 0);
369: options_set_number(so, "bell-action", BELL_ANY);
370: options_set_number(so, "buffer-limit", 9);
371: options_set_string(so, "default-command", "%s", "");
372: options_set_string(so, "default-shell", "%s", getshell());
373: options_set_string(so, "default-terminal", "screen");
374: options_set_number(so, "display-panes-colour", 4);
375: options_set_number(so, "display-panes-time", 1000);
376: options_set_number(so, "display-time", 750);
377: options_set_number(so, "history-limit", 2000);
378: options_set_number(so, "lock-after-time", 0);
1.45 nicm 379: options_set_string(so, "lock-command", "lock -np");
1.48 ! nicm 380: options_set_number(so, "lock-server", 1);
1.42 nicm 381: options_set_number(so, "message-attr", 0);
382: options_set_number(so, "message-bg", 3);
383: options_set_number(so, "message-fg", 0);
384: options_set_number(so, "repeat-time", 500);
385: options_set_number(so, "set-remain-on-exit", 0);
386: options_set_number(so, "set-titles", 0);
1.43 nicm 387: options_set_string(so, "set-titles-string", "#S:#I:#W - \"#T\"");
1.42 nicm 388: options_set_number(so, "status", 1);
389: options_set_number(so, "status-attr", 0);
390: options_set_number(so, "status-bg", 2);
391: options_set_number(so, "status-fg", 0);
392: options_set_number(so, "status-interval", 15);
393: options_set_number(so, "status-justify", 0);
394: options_set_number(so, "status-keys", MODEKEY_EMACS);
395: options_set_string(so, "status-left", "[#S]");
396: options_set_number(so, "status-left-attr", 0);
397: options_set_number(so, "status-left-bg", 8);
398: options_set_number(so, "status-left-fg", 8);
399: options_set_number(so, "status-left-length", 10);
400: options_set_string(so, "status-right", "\"#22T\" %%H:%%M %%d-%%b-%%y");
401: options_set_number(so, "status-right-attr", 0);
402: options_set_number(so, "status-right-bg", 8);
403: options_set_number(so, "status-right-fg", 8);
404: options_set_number(so, "status-right-length", 40);
405: options_set_string(so, "terminal-overrides",
406: "*88col*:colors=88,*256col*:colors=256");
407: options_set_string(so, "update-environment", "DISPLAY "
1.35 nicm 408: "WINDOWID SSH_ASKPASS SSH_AUTH_SOCK SSH_AGENT_PID SSH_CONNECTION");
1.42 nicm 409: options_set_number(so, "visual-activity", 0);
410: options_set_number(so, "visual-bell", 0);
411: options_set_number(so, "visual-content", 0);
1.44 nicm 412:
413: keylist = xmalloc(sizeof *keylist);
414: ARRAY_INIT(keylist);
415: ARRAY_ADD(keylist, '\002');
416: options_set_data(so, "prefix", keylist, xfree);
1.1 nicm 417:
1.12 nicm 418: options_init(&global_w_options, NULL);
1.42 nicm 419: wo = &global_w_options;
420: options_set_number(wo, "aggressive-resize", 0);
421: options_set_number(wo, "automatic-rename", 1);
422: options_set_number(wo, "clock-mode-colour", 4);
423: options_set_number(wo, "clock-mode-style", 1);
424: options_set_number(wo, "force-height", 0);
425: options_set_number(wo, "force-width", 0);
426: options_set_number(wo, "main-pane-height", 24);
427: options_set_number(wo, "main-pane-width", 81);
428: options_set_number(wo, "mode-attr", 0);
429: options_set_number(wo, "mode-bg", 3);
430: options_set_number(wo, "mode-fg", 0);
431: options_set_number(wo, "mode-keys", MODEKEY_EMACS);
432: options_set_number(wo, "mode-mouse", 0);
433: options_set_number(wo, "monitor-activity", 0);
434: options_set_string(wo, "monitor-content", "%s", "");
435: options_set_number(wo, "window-status-attr", 0);
436: options_set_number(wo, "window-status-bg", 8);
437: options_set_number(wo, "window-status-current-attr", 0);
438: options_set_number(wo, "window-status-current-bg", 8);
439: options_set_number(wo, "window-status-current-fg", 8);
440: options_set_number(wo, "window-status-fg", 8);
441: options_set_number(wo, "xterm-keys", 0);
442: options_set_number(wo, "remain-on-exit", 0);
1.47 nicm 443: options_set_number(wo, "synchronize-panes", 0);
1.42 nicm 444:
445: if (flags & IDENTIFY_UTF8) {
446: options_set_number(so, "status-utf8", 1);
447: options_set_number(wo, "utf8", 1);
448: } else {
449: options_set_number(so, "status-utf8", 0);
450: options_set_number(wo, "utf8", 0);
451: }
452:
453: if (getcwd(cwd, sizeof cwd) == NULL) {
454: pw = getpwuid(getuid());
455: if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
456: strlcpy(cwd, pw->pw_dir, sizeof cwd);
457: else
458: strlcpy(cwd, "/", sizeof cwd);
459: }
460: options_set_string(so, "default-path", "%s", cwd);
1.1 nicm 461:
462: if (cfg_file == NULL) {
463: home = getenv("HOME");
464: if (home == NULL || *home == '\0') {
465: pw = getpwuid(getuid());
466: if (pw != NULL)
467: home = pw->pw_dir;
468: }
469: xasprintf(&cfg_file, "%s/%s", home, DEFAULT_CFG);
470: if (access(cfg_file, R_OK) != 0) {
471: xfree(cfg_file);
472: cfg_file = NULL;
473: }
474: } else {
475: if (access(cfg_file, R_OK) != 0) {
476: log_warn("%s", cfg_file);
477: exit(1);
478: }
479: }
1.21 nicm 480:
1.1 nicm 481: if (label == NULL)
482: label = xstrdup("default");
483: if (path == NULL && (path = makesockpath(label)) == NULL) {
484: log_warn("can't create socket");
485: exit(1);
486: }
487: xfree(label);
488:
1.46 nicm 489: if (shellcmd != NULL) {
490: msg = MSG_SHELL;
491: buf = NULL;
492: len = 0;
493: } else if (prepare_cmd(&msg, &buf, &len, argc, argv) != 0)
1.45 nicm 494: exit(1);
1.21 nicm 495:
1.46 nicm 496: if (shellcmd != NULL)
497: cmdflags |= CMD_STARTSERVER;
498: else if (argc == 0) /* new-session is the default */
1.30 nicm 499: cmdflags |= CMD_STARTSERVER|CMD_SENDENVIRON;
1.21 nicm 500: else {
501: /*
502: * It sucks parsing the command string twice (in client and
503: * later in server) but it is necessary to get the start server
504: * flag.
505: */
506: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
507: log_warnx("%s", cause);
508: exit(1);
1.1 nicm 509: }
1.21 nicm 510: cmdflags &= ~CMD_STARTSERVER;
1.1 nicm 511: TAILQ_FOREACH(cmd, cmdlist, qentry) {
1.29 nicm 512: if (cmd->entry->flags & CMD_STARTSERVER)
1.20 nicm 513: cmdflags |= CMD_STARTSERVER;
1.29 nicm 514: if (cmd->entry->flags & CMD_SENDENVIRON)
515: cmdflags |= CMD_SENDENVIRON;
1.1 nicm 516: }
1.21 nicm 517: cmd_list_free(cmdlist);
1.1 nicm 518: }
519:
520: memset(&cctx, 0, sizeof cctx);
1.20 nicm 521: if (client_init(path, &cctx, cmdflags, flags) != 0)
1.1 nicm 522: exit(1);
523: xfree(path);
524:
1.21 nicm 525: client_write_server(&cctx, msg, buf, len);
526: memset(buf, 0, len);
1.1 nicm 527:
528: retcode = 0;
529: for (;;) {
1.31 nicm 530: pfd.fd = cctx.ibuf.fd;
1.1 nicm 531: pfd.events = POLLIN;
1.31 nicm 532: if (cctx.ibuf.w.queued != 0)
1.1 nicm 533: pfd.events |= POLLOUT;
534:
1.31 nicm 535: if ((nfds = poll(&pfd, 1, INFTIM)) == -1) {
1.1 nicm 536: if (errno == EAGAIN || errno == EINTR)
537: continue;
538: fatal("poll failed");
539: }
1.31 nicm 540: if (nfds == 0)
541: continue;
542:
543: if (pfd.revents & (POLLERR|POLLHUP|POLLNVAL))
544: fatalx("socket error");
545:
546: if (pfd.revents & POLLIN) {
1.46 nicm 547: if (dispatch_imsg(&cctx, shellcmd, &retcode) != 0)
1.31 nicm 548: break;
549: }
550:
551: if (pfd.revents & POLLOUT) {
552: if (msgbuf_write(&cctx.ibuf.w) < 0)
553: fatalx("msgbuf_write failed");
554: }
555: }
556:
557: options_free(&global_s_options);
558: options_free(&global_w_options);
559:
560: return (retcode);
561: }
562:
563: int
1.46 nicm 564: dispatch_imsg(struct client_ctx *cctx, const char *shellcmd, int *retcode)
1.31 nicm 565: {
566: struct imsg imsg;
567: ssize_t n, datalen;
568: struct msg_print_data printdata;
1.46 nicm 569: struct msg_shell_data shelldata;
1.1 nicm 570:
1.31 nicm 571: if ((n = imsg_read(&cctx->ibuf)) == -1 || n == 0)
572: fatalx("imsg_read failed");
1.1 nicm 573:
1.31 nicm 574: for (;;) {
575: if ((n = imsg_get(&cctx->ibuf, &imsg)) == -1)
576: fatalx("imsg_get failed");
577: if (n == 0)
578: return (0);
579: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1.1 nicm 580:
1.31 nicm 581: switch (imsg.hdr.type) {
1.1 nicm 582: case MSG_EXIT:
583: case MSG_SHUTDOWN:
1.31 nicm 584: if (datalen != 0)
585: fatalx("bad MSG_EXIT size");
586:
587: return (-1);
1.1 nicm 588: case MSG_ERROR:
1.31 nicm 589: *retcode = 1;
1.1 nicm 590: /* FALLTHROUGH */
591: case MSG_PRINT:
1.31 nicm 592: if (datalen != sizeof printdata)
1.1 nicm 593: fatalx("bad MSG_PRINT size");
1.31 nicm 594: memcpy(&printdata, imsg.data, sizeof printdata);
595: printdata.msg[(sizeof printdata.msg) - 1] = '\0';
1.21 nicm 596:
597: log_info("%s", printdata.msg);
1.31 nicm 598: break;
1.1 nicm 599: case MSG_READY:
1.31 nicm 600: if (datalen != 0)
601: fatalx("bad MSG_READY size");
602:
603: *retcode = client_main(cctx);
604: return (-1);
605: case MSG_VERSION:
606: if (datalen != 0)
607: fatalx("bad MSG_VERSION size");
608:
609: log_warnx("protocol version mismatch (client %u, "
610: "server %u)", PROTOCOL_VERSION, imsg.hdr.peerid);
611: *retcode = 1;
612: return (-1);
1.46 nicm 613: case MSG_SHELL:
614: if (datalen != sizeof shelldata)
615: fatalx("bad MSG_SHELL size");
616: memcpy(&shelldata, imsg.data, sizeof shelldata);
617: shelldata.shell[(sizeof shelldata.shell) - 1] = '\0';
618:
619: shell_exec(shelldata.shell, shellcmd);
1.1 nicm 620: default:
1.31 nicm 621: fatalx("unexpected message");
1.1 nicm 622: }
1.31 nicm 623:
624: imsg_free(&imsg);
1.1 nicm 625: }
1.46 nicm 626: }
627:
628: __dead void
629: shell_exec(const char *shell, const char *shellcmd)
630: {
631: const char *shellname, *ptr;
632: char *argv0;
633:
634: sigreset();
635:
636: ptr = strrchr(shell, '/');
637: if (ptr != NULL && *(ptr + 1) != '\0')
638: shellname = ptr + 1;
639: else
640: shellname = shell;
641: if (login_shell)
642: xasprintf(&argv0, "-%s", shellname);
643: else
644: xasprintf(&argv0, "%s", shellname);
645: setenv("SHELL", shell, 1);
646:
647: execl(shell, argv0, "-c", shellcmd, (char *) NULL);
648: fatal("execl failed");
1.1 nicm 649: }
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