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>
77 #include "myhistedit.h"
82 struct jmploc main_handler;
83 int localeisutf8, initial_localeisutf8;
85 static void reset(void);
86 static void cmdloop(int);
87 static void read_profile(const char *);
88 static char *find_dot_file(char *);
91 * Main routine. We initialize things, parse the arguments, execute
92 * profiles if we're a login shell, and then call cmdloop to execute
93 * commands. The setjmp call sets up the location to jump to when an
94 * exception occurs. When an exception occurs the variable "state"
95 * is used to figure out how far we had gotten.
99 main(int argc, char *argv[])
102 * As smark is accessed after a longjmp, it cannot be a local in main().
103 * The C standard specifies that the values of non-volatile local
104 * variables are unspecified after a jump if modified between the
105 * setjmp and longjmp.
107 static struct stackmark smark, smark2;
111 (void) setlocale(LC_ALL, "");
114 if (setjmp(main_handler.loc)) {
115 if (state == 0 || iflag == 0 || ! rootshell ||
117 exitshell(exitstatus);
119 if (exception == EXINT)
121 popstackmark(&smark);
122 FORCEINTON; /* enable interrupts */
132 handler = &main_handler;
135 trputs("Shell args: "); trargs(argv);
141 setstackmark(&smark);
142 setstackmark(&smark2);
143 procargs(argc, argv);
149 if (argv[0] && argv[0][0] == '-') {
151 read_profile("/etc/profile");
155 read_profile("${HOME-}/.profile");
157 read_profile("/etc/suid_profile");
161 if (!privileged && iflag) {
162 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
164 read_profile(shinit);
173 popstackmark(&smark2);
175 evalstring(minusc, sflag ? 0 : EV_EXIT);
178 if (sflag || minusc == NULL) {
181 exitshell(exitstatus);
194 * Read and execute commands. "Top" is nonzero for the top level command
195 * loop; it turns on prompting if the shell is interactive.
202 struct stackmark smark;
206 TRACE(("cmdloop(%d) called\n", top));
207 setstackmark(&smark);
214 showjobs(1, SHOWJOBS_DEFAULT);
219 /* showtree(n); DEBUG */
221 if (!top || numeof >= 50)
223 if (!stoppedjobs()) {
226 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
229 } else if (n != NULL && nflag == 0) {
230 job_warning = (job_warning == 2) ? 1 : 0;
234 popstackmark(&smark);
235 setstackmark(&smark);
237 if (evalskip == SKIPRETURN)
242 popstackmark(&smark);
252 * Read /etc/profile or .profile. Return on error.
256 read_profile(const char *name)
259 const char *expandedname;
260 int oflags = O_RDONLY | O_CLOEXEC;
265 expandedname = expandstr(name);
266 if (expandedname == NULL)
269 if ((fd = open(expandedname, oflags)) >= 0)
281 * Read a file containing shell functions.
285 readcmdfile(const char *name, int verify)
287 setinputfile(name, 1, verify);
295 * Take commands from a file. To be compatible we should do a path
296 * search for the file, which is necessary to find sub-commands.
301 find_dot_file(char *basename)
305 const char *path = pathval();
308 /* don't try this for absolute or relative paths */
309 if( strchr(basename, '/'))
312 while ((fullname = padvance(&path, &opt, basename)) != NULL) {
313 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
315 * Don't bother freeing here, since it will
316 * be freed by the caller.
326 dotcmd(int argc, char **argv)
328 char *filename, *fullname;
331 error("missing filename");
336 * Because we have historically not supported any options,
337 * only treat "--" specially.
339 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
341 fullname = find_dot_file(filename);
342 setinputfile(fullname, 1, -1 /* verify */);
343 commandname = fullname;
351 exitcmd(int argc, char **argv)
356 exitshell(number(argv[1]));
358 exitshell_savedstatus();