2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static char const copyright[] =
37 "@(#) Copyright (c) 1991, 1993\n\
38 The Regents of the University of California. All rights reserved.\n";
43 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/28/95";
46 #include <sys/cdefs.h>
47 __FBSDID("$FreeBSD$");
81 struct jmploc main_handler;
82 int localeisutf8, initial_localeisutf8;
84 static void reset(void);
85 static void cmdloop(int);
86 static void read_profile(const char *);
87 static char *find_dot_file(char *);
90 * Main routine. We initialize things, parse the arguments, execute
91 * profiles if we're a login shell, and then call cmdloop to execute
92 * commands. The setjmp call sets up the location to jump to when an
93 * exception occurs. When an exception occurs the variable "state"
94 * is used to figure out how far we had gotten.
98 main(int argc, char *argv[])
100 struct stackmark smark, smark2;
104 (void) setlocale(LC_ALL, "");
107 if (setjmp(main_handler.loc)) {
108 if (state == 0 || iflag == 0 || ! rootshell ||
110 exitshell(exitstatus);
112 if (exception == EXINT)
114 popstackmark(&smark);
115 FORCEINTON; /* enable interrupts */
125 handler = &main_handler;
128 trputs("Shell args: "); trargs(argv);
134 setstackmark(&smark);
135 setstackmark(&smark2);
136 procargs(argc, argv);
142 if (argv[0] && argv[0][0] == '-') {
144 read_profile("/etc/profile");
148 read_profile("${HOME-}/.profile");
150 read_profile("/etc/suid_profile");
154 if (!privileged && iflag) {
155 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
157 read_profile(shinit);
162 popstackmark(&smark2);
164 evalstring(minusc, sflag ? 0 : EV_EXIT);
167 if (sflag || minusc == NULL) {
170 exitshell(exitstatus);
183 * Read and execute commands. "Top" is nonzero for the top level command
184 * loop; it turns on prompting if the shell is interactive.
191 struct stackmark smark;
195 TRACE(("cmdloop(%d) called\n", top));
196 setstackmark(&smark);
203 showjobs(1, SHOWJOBS_DEFAULT);
208 /* showtree(n); DEBUG */
210 if (!top || numeof >= 50)
212 if (!stoppedjobs()) {
215 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
218 } else if (n != NULL && nflag == 0) {
219 job_warning = (job_warning == 2) ? 1 : 0;
223 popstackmark(&smark);
224 setstackmark(&smark);
226 if (evalskip == SKIPRETURN)
231 popstackmark(&smark);
241 * Read /etc/profile or .profile. Return on error.
245 read_profile(const char *name)
248 const char *expandedname;
250 expandedname = expandstr(name);
251 if (expandedname == NULL)
254 if ((fd = open(expandedname, O_RDONLY | O_CLOEXEC)) >= 0)
266 * Read a file containing shell functions.
270 readcmdfile(const char *name)
272 setinputfile(name, 1);
280 * Take commands from a file. To be compatible we should do a path
281 * search for the file, which is necessary to find sub-commands.
286 find_dot_file(char *basename)
290 const char *path = pathval();
293 /* don't try this for absolute or relative paths */
294 if( strchr(basename, '/'))
297 while ((fullname = padvance(&path, &opt, basename)) != NULL) {
298 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
300 * Don't bother freeing here, since it will
301 * be freed by the caller.
311 dotcmd(int argc, char **argv)
313 char *filename, *fullname;
316 error("missing filename");
321 * Because we have historically not supported any options,
322 * only treat "--" specially.
324 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
326 fullname = find_dot_file(filename);
327 setinputfile(fullname, 1);
328 commandname = fullname;
336 exitcmd(int argc, char **argv)
341 exitshell(number(argv[1]));
343 exitshell_savedstatus();