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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 static char const copyright[] =
35 "@(#) Copyright (c) 1991, 1993\n\
36 The Regents of the University of California. All rights reserved.\n";
41 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/28/95";
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
79 STATIC void read_profile(char *);
80 STATIC char *find_dot_file(char *);
83 * Main routine. We initialize things, parse the arguments, execute
84 * profiles if we're a login shell, and then call cmdloop to execute
85 * commands. The setjmp call sets up the location to jump to when an
86 * exception occurs. When an exception occurs the variable "state"
87 * is used to figure out how far we had gotten.
91 main(int argc, char *argv[])
94 struct stackmark smark;
98 (void) setlocale(LC_ALL, "");
100 if (setjmp(jmploc.loc)) {
102 * When a shell procedure is executed, we raise the
103 * exception EXSHELLPROC to clean up before executing
104 * the shell procedure.
115 exitstatus = exerrno;
126 if (exception != EXSHELLPROC) {
127 if (state == 0 || iflag == 0 || ! rootshell)
128 exitshell(exitstatus);
131 if (exception == EXINT) {
135 popstackmark(&smark);
136 FORCEINTON; /* enable interrupts */
149 trputs("Shell args: "); trargs(argv);
154 setstackmark(&smark);
155 procargs(argc, argv);
156 if (getpwd() == NULL && iflag)
157 out2str("sh: cannot determine working directory\n");
158 if (argv[0] && argv[0][0] == '-') {
160 read_profile("/etc/profile");
164 read_profile(".profile");
166 read_profile("/etc/suid_profile");
170 if (!privileged && iflag) {
171 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
173 read_profile(shinit);
181 if (sflag || minusc == NULL) {
182 state4: /* XXX ??? - why isn't this before the "if" statement */
185 exitshell(exitstatus);
192 * Read and execute commands. "Top" is nonzero for the top level command
193 * loop; it turns on prompting if the shell is interactive.
200 struct stackmark smark;
204 TRACE(("cmdloop(%d) called\n", top));
205 setstackmark(&smark);
217 /* showtree(n); DEBUG */
219 if (!top || numeof >= 50)
221 if (!stoppedjobs()) {
224 out2str("\nUse \"exit\" to leave shell.\n");
227 } else if (n != NULL && nflag == 0) {
228 job_warning = (job_warning == 2) ? 1 : 0;
232 popstackmark(&smark);
233 setstackmark(&smark);
234 if (evalskip == SKIPFILE) {
239 popstackmark(&smark);
245 * Read /etc/profile or .profile. Return on error.
249 read_profile(char *name)
254 if ((fd = open(name, O_RDONLY)) >= 0)
266 * Read a file containing shell functions.
270 readcmdfile(char *name)
275 if ((fd = open(name, O_RDONLY)) >= 0)
278 error("Can't open %s: %s", name, strerror(errno));
287 * Take commands from a file. To be compatible we should do a path
288 * search for the file, which is necessary to find sub-commands.
293 find_dot_file(char *basename)
295 static char localname[FILENAME_MAX+1];
297 char *path = pathval();
300 /* don't try this for absolute or relative paths */
301 if( strchr(basename, '/'))
304 while ((fullname = padvance(&path, basename)) != NULL) {
305 strcpy(localname, fullname);
307 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode))
314 dotcmd(int argc, char **argv)
319 for (sp = cmdenviron; sp ; sp = sp->next)
320 setvareq(savestr(sp->text), VSTRFIXED|VTEXTFIXED);
322 if (argc >= 2) { /* That's what SVR2 does */
323 char *fullname = find_dot_file(argv[1]);
325 setinputfile(fullname, 1);
326 commandname = fullname;
335 exitcmd(int argc, char **argv)
337 extern int oexitstatus;
342 exitstatus = number(argv[1]);
344 exitstatus = oexitstatus;
345 exitshell(exitstatus);