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("$FreeBSD$");
78 struct jmploc main_handler;
80 static void read_profile(const char *);
81 static char *find_dot_file(char *);
84 * Main routine. We initialize things, parse the arguments, execute
85 * profiles if we're a login shell, and then call cmdloop to execute
86 * commands. The setjmp call sets up the location to jump to when an
87 * exception occurs. When an exception occurs the variable "state"
88 * is used to figure out how far we had gotten.
92 main(int argc, char *argv[])
94 struct stackmark smark;
98 (void) setlocale(LC_ALL, "");
100 if (setjmp(main_handler.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 */
146 handler = &main_handler;
149 trputs("Shell args: "); trargs(argv);
154 setstackmark(&smark);
155 procargs(argc, argv);
159 if (argv[0] && argv[0][0] == '-') {
161 read_profile("/etc/profile");
165 read_profile(".profile");
167 read_profile("/etc/suid_profile");
171 if (!privileged && iflag) {
172 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
174 read_profile(shinit);
180 evalstring(minusc, sflag ? 0 : EV_EXIT);
182 if (sflag || minusc == NULL) {
183 state4: /* XXX ??? - why isn't this before the "if" statement */
186 exitshell(exitstatus);
193 * Read and execute commands. "Top" is nonzero for the top level command
194 * loop; it turns on prompting if the shell is interactive.
201 struct stackmark smark;
205 TRACE(("cmdloop(%d) called\n", top));
206 setstackmark(&smark);
213 showjobs(1, SHOWJOBS_DEFAULT);
218 /* showtree(n); DEBUG */
220 if (!top || numeof >= 50)
222 if (!stoppedjobs()) {
225 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
228 } else if (n != NULL && nflag == 0) {
229 job_warning = (job_warning == 2) ? 1 : 0;
233 popstackmark(&smark);
234 setstackmark(&smark);
236 if (evalskip == SKIPFILE)
241 popstackmark(&smark);
247 * Read /etc/profile or .profile. Return on error.
251 read_profile(const char *name)
256 if ((fd = open(name, O_RDONLY)) >= 0)
268 * Read a file containing shell functions.
272 readcmdfile(const char *name)
277 if ((fd = open(name, O_RDONLY)) >= 0)
280 error("Can't open %s: %s", name, strerror(errno));
289 * Take commands from a file. To be compatible we should do a path
290 * search for the file, which is necessary to find sub-commands.
295 find_dot_file(char *basename)
297 static char localname[FILENAME_MAX+1];
299 const char *path = pathval();
302 /* don't try this for absolute or relative paths */
303 if( strchr(basename, '/'))
306 while ((fullname = padvance(&path, basename)) != NULL) {
307 strcpy(localname, fullname);
309 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode))
316 dotcmd(int argc, char **argv)
318 char *filename, *fullname;
321 error("missing filename");
326 * Because we have historically not supported any options,
327 * only treat "--" specially.
329 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
331 fullname = find_dot_file(filename);
332 setinputfile(fullname, 1);
333 commandname = fullname;
341 exitcmd(int argc, char **argv)
346 exitstatus = number(argv[1]);
348 exitstatus = oexitstatus;
349 exitshell(exitstatus);