2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)main.c 8.6 (Berkeley) 5/28/95
38 * $FreeBSD: src/bin/sh/main.c,v 1.18.2.3 2002/07/19 04:38:51 tjr Exp $
39 * $DragonFly: src/bin/sh/main.c,v 1.6 2006/09/28 22:29:44 pavalos Exp $
76 short profile_buf[16384];
80 STATIC void read_profile(const char *);
81 STATIC const char *find_dot_file(const char *);
83 extern int oexitstatus;
86 * Main routine. We initialize things, parse the arguments, execute
87 * profiles if we're a login shell, and then call cmdloop to execute
88 * commands. The setjmp call sets up the location to jump to when an
89 * exception occurs. When an exception occurs the variable "state"
90 * is used to figure out how far we had gotten.
94 main(int argc, char *argv[])
97 struct stackmark smark;
102 monitor(4, etext, profile_buf, sizeof profile_buf, 50);
104 setlocale(LC_ALL, "");
106 if (setjmp(jmploc.loc)) {
108 * When a shell procedure is executed, we raise the
109 * exception EXSHELLPROC to clean up before executing
110 * the shell procedure.
121 exitstatus = exerrno;
132 if (exception != EXSHELLPROC) {
133 if (state == 0 || iflag == 0 || ! rootshell)
134 exitshell(exitstatus);
137 if (exception == EXINT) {
141 popstackmark(&smark);
142 FORCEINTON; /* enable interrupts */
155 trputs("Shell args: "); trargs(argv);
160 setstackmark(&smark);
161 procargs(argc, argv);
162 if (getpwd() == NULL && iflag)
163 out2str("sh: cannot determine working directory\n");
164 if (argv[0] && argv[0][0] == '-') {
166 read_profile("/etc/profile");
170 read_profile(".profile");
172 read_profile("/etc/suid_profile");
176 if (!privileged && iflag) {
177 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
179 read_profile(shinit);
187 if (sflag || minusc == NULL) {
188 state4: /* XXX ??? - why isn't this before the "if" statement */
194 exitshell(exitstatus);
201 * Read and execute commands. "Top" is nonzero for the top level command
202 * loop; it turns on prompting if the shell is interactive.
209 struct stackmark smark;
213 TRACE(("cmdloop(%d) called\n", top));
214 setstackmark(&smark);
226 /* showtree(n); DEBUG */
228 if (!top || numeof >= 50)
230 if (!stoppedjobs()) {
233 out2str("\nUse \"exit\" to leave shell.\n");
236 } else if (n != NULL && nflag == 0) {
237 job_warning = (job_warning == 2) ? 1 : 0;
241 popstackmark(&smark);
242 setstackmark(&smark);
243 if (evalskip == SKIPFILE) {
248 popstackmark(&smark);
254 * Read /etc/profile or .profile. Return on error.
258 read_profile(const char *name)
263 if ((fd = open(name, O_RDONLY)) >= 0)
275 * Read a file containing shell functions.
279 readcmdfile(char *name)
284 if ((fd = open(name, O_RDONLY)) >= 0)
287 error("Can't open %s: %s", name, strerror(errno));
296 * Take commands from a file. To be compatible we should do a path
297 * search for the file, which is necessary to find sub-commands.
302 find_dot_file(const char *basename)
304 static char localname[FILENAME_MAX+1];
306 const char *path = pathval();
309 /* don't try this for absolute or relative paths */
310 if( strchr(basename, '/'))
313 while ((fullname = padvance(&path, basename)) != NULL) {
314 strcpy(localname, fullname);
316 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode))
323 dotcmd(int argc, char **argv)
328 for (sp = cmdenviron; sp ; sp = sp->next)
329 setvareq(savestr(sp->text), VSTRFIXED|VTEXTFIXED);
331 if (argc >= 2) { /* That's what SVR2 does */
332 const char *fullname = find_dot_file(argv[1]);
334 setinputfile(fullname, 1);
335 commandname = fullname;
344 exitcmd(int argc, char **argv)
349 exitstatus = number(argv[1]);
351 exitstatus = oexitstatus;
352 exitshell(exitstatus);