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 cmdloop(int);
83 static void read_profile(char *);
84 static char *find_dot_file(char *);
87 * Main routine. We initialize things, parse the arguments, execute
88 * profiles if we're a login shell, and then call cmdloop to execute
89 * commands. The setjmp call sets up the location to jump to when an
90 * exception occurs. When an exception occurs the variable "state"
91 * is used to figure out how far we had gotten.
95 main(int argc, char *argv[])
97 struct stackmark smark, smark2;
101 (void) setlocale(LC_ALL, "");
104 if (setjmp(main_handler.loc)) {
107 exitstatus = exerrno;
118 if (state == 0 || iflag == 0 || ! rootshell ||
120 exitshell(exitstatus);
122 if (exception == EXINT)
124 popstackmark(&smark);
125 FORCEINTON; /* enable interrupts */
135 handler = &main_handler;
138 trputs("Shell args: "); trargs(argv);
143 setstackmark(&smark);
144 setstackmark(&smark2);
145 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);
169 popstackmark(&smark2);
171 evalstring(minusc, sflag ? 0 : EV_EXIT);
173 if (sflag || minusc == NULL) {
174 state4: /* XXX ??? - why isn't this before the "if" statement */
177 exitshell(exitstatus);
184 * Read and execute commands. "Top" is nonzero for the top level command
185 * loop; it turns on prompting if the shell is interactive.
192 struct stackmark smark;
196 TRACE(("cmdloop(%d) called\n", top));
197 setstackmark(&smark);
204 showjobs(1, SHOWJOBS_DEFAULT);
209 /* showtree(n); DEBUG */
211 if (!top || numeof >= 50)
213 if (!stoppedjobs()) {
216 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
219 } else if (n != NULL && nflag == 0) {
220 job_warning = (job_warning == 2) ? 1 : 0;
224 popstackmark(&smark);
225 setstackmark(&smark);
227 if (evalskip == SKIPFILE)
232 popstackmark(&smark);
238 * Read /etc/profile or .profile. Return on error.
242 read_profile(char *name)
245 const char *expandedname;
247 expandedname = expandstr(name);
248 if (expandedname == NULL)
251 if ((fd = open(expandedname, O_RDONLY)) >= 0)
263 * Read a file containing shell functions.
267 readcmdfile(const char *name)
269 setinputfile(name, 1);
277 * Take commands from a file. To be compatible we should do a path
278 * search for the file, which is necessary to find sub-commands.
283 find_dot_file(char *basename)
286 const char *path = pathval();
289 /* don't try this for absolute or relative paths */
290 if( strchr(basename, '/'))
293 while ((fullname = padvance(&path, basename)) != NULL) {
294 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
296 * Don't bother freeing here, since it will
297 * be freed by the caller.
307 dotcmd(int argc, char **argv)
309 char *filename, *fullname;
312 error("missing filename");
317 * Because we have historically not supported any options,
318 * only treat "--" specially.
320 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
322 fullname = find_dot_file(filename);
323 setinputfile(fullname, 1);
324 commandname = fullname;
332 exitcmd(int argc, char **argv)
337 exitshell(number(argv[1]));
339 exitshell_savedstatus();