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 1.53 2012/01/01 22:17:12 jilles Exp $
73 struct jmploc main_handler;
74 int localeisutf8, initial_localeisutf8;
76 static void cmdloop(int);
77 static void read_profile(const char *);
78 static const char *find_dot_file(const char *);
81 * Main routine. We initialize things, parse the arguments, execute
82 * profiles if we're a login shell, and then call cmdloop to execute
83 * commands. The setjmp call sets up the location to jump to when an
84 * exception occurs. When an exception occurs the variable "state"
85 * is used to figure out how far we had gotten.
89 main(int argc, char *argv[])
91 struct stackmark smark, smark2;
95 setlocale(LC_ALL, "");
98 if (setjmp(main_handler.loc)) {
101 exitstatus = exerrno;
112 if (state == 0 || iflag == 0 || ! rootshell ||
114 exitshell(exitstatus);
116 if (exception == EXINT)
118 popstackmark(&smark);
119 FORCEINTON; /* enable interrupts */
129 handler = &main_handler;
132 trputs("Shell args: "); trargs(argv);
137 setstackmark(&smark);
138 setstackmark(&smark2);
139 procargs(argc, argv);
143 if (argv[0] && argv[0][0] == '-') {
145 read_profile("/etc/profile");
149 read_profile("${HOME-}/.profile");
151 read_profile("/etc/suid_profile");
155 if (!privileged && iflag) {
156 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
158 read_profile(shinit);
163 popstackmark(&smark2);
165 evalstring(minusc, sflag ? 0 : EV_EXIT);
167 if (sflag || minusc == NULL) {
168 state4: /* XXX ??? - why isn't this before the "if" statement */
171 exitshell(exitstatus);
178 * Read and execute commands. "Top" is nonzero for the top level command
179 * loop; it turns on prompting if the shell is interactive.
186 struct stackmark smark;
190 TRACE(("cmdloop(%d) called\n", top));
191 setstackmark(&smark);
198 showjobs(1, SHOWJOBS_DEFAULT);
203 /* showtree(n); DEBUG */
205 if (!top || numeof >= 50)
207 if (!stoppedjobs()) {
210 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
213 } else if (n != NULL && nflag == 0) {
214 job_warning = (job_warning == 2) ? 1 : 0;
218 popstackmark(&smark);
219 setstackmark(&smark);
221 if (evalskip == SKIPFILE)
226 popstackmark(&smark);
232 * Read /etc/profile or .profile. Return on error.
236 read_profile(const char *name)
239 const char *expandedname;
241 expandedname = expandstr(__DECONST(char *, name));
242 if (expandedname == NULL)
245 if ((fd = open(expandedname, O_RDONLY)) >= 0)
257 * Read a file containing shell functions.
261 readcmdfile(const char *name)
266 if ((fd = open(name, O_RDONLY)) >= 0)
269 error("cannot open %s: %s", name, strerror(errno));
278 * Take commands from a file. To be compatible we should do a path
279 * search for the file, which is necessary to find sub-commands.
284 find_dot_file(const char *basename)
287 const char *path = pathval();
290 /* don't try this for absolute or relative paths */
291 if( strchr(basename, '/'))
294 while ((fullname = padvance(&path, basename)) != NULL) {
295 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
297 * Don't bother freeing here, since it will
298 * be freed by the caller.
308 dotcmd(int argc, char **argv)
310 const char *fullname;
314 error("missing filename");
319 * Because we have historically not supported any options,
320 * only treat "--" specially.
322 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
324 fullname = find_dot_file(filename);
325 setinputfile(fullname, 1);
326 commandname = fullname;
334 exitcmd(int argc, char **argv)
339 exitshell(number(argv[1]));
341 exitshell_savedstatus();