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 struct jmploc main_handler;
80 int localeisutf8, initial_localeisutf8;
82 static void reset(void);
83 static void cmdloop(int);
84 static void read_profile(const char *);
85 static char *find_dot_file(char *);
88 * Main routine. We initialize things, parse the arguments, execute
89 * profiles if we're a login shell, and then call cmdloop to execute
90 * commands. The setjmp call sets up the location to jump to when an
91 * exception occurs. When an exception occurs the variable "state"
92 * is used to figure out how far we had gotten.
96 main(int argc, char *argv[])
98 struct stackmark smark, smark2;
102 (void) setlocale(LC_ALL, "");
105 if (setjmp(main_handler.loc)) {
108 exitstatus = exerrno;
119 if (state == 0 || iflag == 0 || ! rootshell ||
121 exitshell(exitstatus);
123 if (exception == EXINT)
125 popstackmark(&smark);
126 FORCEINTON; /* enable interrupts */
136 handler = &main_handler;
139 trputs("Shell args: "); trargs(argv);
144 setstackmark(&smark);
145 setstackmark(&smark2);
146 procargs(argc, argv);
150 if (argv[0] && argv[0][0] == '-') {
152 read_profile("/etc/profile");
156 read_profile("${HOME-}/.profile");
158 read_profile("/etc/suid_profile");
162 if (!privileged && iflag) {
163 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
165 read_profile(shinit);
170 popstackmark(&smark2);
172 evalstring(minusc, sflag ? 0 : EV_EXIT);
175 if (sflag || minusc == NULL) {
178 exitshell(exitstatus);
191 * Read and execute commands. "Top" is nonzero for the top level command
192 * loop; it turns on prompting if the shell is interactive.
199 struct stackmark smark;
203 TRACE(("cmdloop(%d) called\n", top));
204 setstackmark(&smark);
211 showjobs(1, SHOWJOBS_DEFAULT);
216 /* showtree(n); DEBUG */
218 if (!top || numeof >= 50)
220 if (!stoppedjobs()) {
223 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
226 } else if (n != NULL && nflag == 0) {
227 job_warning = (job_warning == 2) ? 1 : 0;
231 popstackmark(&smark);
232 setstackmark(&smark);
234 if (evalskip == SKIPRETURN)
239 popstackmark(&smark);
245 * Read /etc/profile or .profile. Return on error.
249 read_profile(const char *name)
252 const char *expandedname;
254 expandedname = expandstr(name);
255 if (expandedname == NULL)
258 if ((fd = open(expandedname, O_RDONLY | O_CLOEXEC)) >= 0)
270 * Read a file containing shell functions.
274 readcmdfile(const char *name)
276 setinputfile(name, 1);
284 * Take commands from a file. To be compatible we should do a path
285 * search for the file, which is necessary to find sub-commands.
290 find_dot_file(char *basename)
293 const char *path = pathval();
296 /* don't try this for absolute or relative paths */
297 if( strchr(basename, '/'))
300 while ((fullname = padvance(&path, basename)) != NULL) {
301 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
303 * Don't bother freeing here, since it will
304 * be freed by the caller.
314 dotcmd(int argc, char **argv)
316 char *filename, *fullname;
319 error("missing filename");
324 * Because we have historically not supported any options,
325 * only treat "--" specially.
327 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
329 fullname = find_dot_file(filename);
330 setinputfile(fullname, 1);
331 commandname = fullname;
339 exitcmd(int argc, char **argv)
344 exitshell(number(argv[1]));
346 exitshell_savedstatus();