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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)main.c 8.6 (Berkeley) 5/28/95
38 * $FreeBSD: src/bin/sh/main.c,v 1.44 2011/02/04 22:47:55 jilles Exp $
72 struct jmploc main_handler;
74 static void read_profile(const char *);
75 static const char *find_dot_file(const char *);
78 * Main routine. We initialize things, parse the arguments, execute
79 * profiles if we're a login shell, and then call cmdloop to execute
80 * commands. The setjmp call sets up the location to jump to when an
81 * exception occurs. When an exception occurs the variable "state"
82 * is used to figure out how far we had gotten.
86 main(int argc, char *argv[])
88 struct stackmark smark;
92 setlocale(LC_ALL, "");
94 if (setjmp(main_handler.loc)) {
108 if (state == 0 || iflag == 0 || ! rootshell)
109 exitshell(exitstatus);
111 if (exception == EXINT)
113 popstackmark(&smark);
114 FORCEINTON; /* enable interrupts */
124 handler = &main_handler;
127 trputs("Shell args: "); trargs(argv);
132 setstackmark(&smark);
133 procargs(argc, argv);
137 if (argv[0] && argv[0][0] == '-') {
139 read_profile("/etc/profile");
143 read_profile(".profile");
145 read_profile("/etc/suid_profile");
149 if (!privileged && iflag) {
150 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
152 read_profile(shinit);
158 evalstring(minusc, sflag ? 0 : EV_EXIT);
160 if (sflag || minusc == NULL) {
161 state4: /* XXX ??? - why isn't this before the "if" statement */
164 exitshell(exitstatus);
171 * Read and execute commands. "Top" is nonzero for the top level command
172 * loop; it turns on prompting if the shell is interactive.
179 struct stackmark smark;
183 TRACE(("cmdloop(%d) called\n", top));
184 setstackmark(&smark);
191 showjobs(1, SHOWJOBS_DEFAULT);
196 /* showtree(n); DEBUG */
198 if (!top || numeof >= 50)
200 if (!stoppedjobs()) {
203 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
206 } else if (n != NULL && nflag == 0) {
207 job_warning = (job_warning == 2) ? 1 : 0;
211 popstackmark(&smark);
212 setstackmark(&smark);
214 if (evalskip == SKIPFILE)
219 popstackmark(&smark);
225 * Read /etc/profile or .profile. Return on error.
229 read_profile(const char *name)
234 if ((fd = open(name, O_RDONLY)) >= 0)
246 * Read a file containing shell functions.
250 readcmdfile(const char *name)
255 if ((fd = open(name, O_RDONLY)) >= 0)
258 error("Can't open %s: %s", name, strerror(errno));
267 * Take commands from a file. To be compatible we should do a path
268 * search for the file, which is necessary to find sub-commands.
273 find_dot_file(const char *basename)
275 static char localname[FILENAME_MAX+1];
277 const char *path = pathval();
280 /* don't try this for absolute or relative paths */
281 if( strchr(basename, '/'))
284 while ((fullname = padvance(&path, basename)) != NULL) {
285 strcpy(localname, fullname);
287 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode))
294 dotcmd(int argc, char **argv)
296 const char *fullname;
300 error("missing filename");
305 * Because we have historically not supported any options,
306 * only treat "--" specially.
308 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
310 fullname = find_dot_file(filename);
311 setinputfile(fullname, 1);
312 commandname = fullname;
320 exitcmd(int argc, char **argv)
325 exitshell(number(argv[1]));
327 exitshell_savedstatus();