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 1.52 2011/06/13 21:03:27 jilles Exp $
73 struct jmploc main_handler;
74 int localeisutf8, initial_localeisutf8;
76 static void read_profile(const char *);
77 static const char *find_dot_file(const char *);
80 * Main routine. We initialize things, parse the arguments, execute
81 * profiles if we're a login shell, and then call cmdloop to execute
82 * commands. The setjmp call sets up the location to jump to when an
83 * exception occurs. When an exception occurs the variable "state"
84 * is used to figure out how far we had gotten.
88 main(int argc, char *argv[])
90 struct stackmark smark, smark2;
94 setlocale(LC_ALL, "");
97 if (setjmp(main_handler.loc)) {
100 exitstatus = exerrno;
111 if (state == 0 || iflag == 0 || ! rootshell ||
113 exitshell(exitstatus);
115 if (exception == EXINT)
117 popstackmark(&smark);
118 FORCEINTON; /* enable interrupts */
128 handler = &main_handler;
131 trputs("Shell args: "); trargs(argv);
136 setstackmark(&smark);
137 setstackmark(&smark2);
138 procargs(argc, argv);
142 if (argv[0] && argv[0][0] == '-') {
144 read_profile("/etc/profile");
148 read_profile("${HOME-}/.profile");
150 read_profile("/etc/suid_profile");
154 if (!privileged && iflag) {
155 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
157 read_profile(shinit);
162 popstackmark(&smark2);
164 evalstring(minusc, sflag ? 0 : EV_EXIT);
166 if (sflag || minusc == NULL) {
167 state4: /* XXX ??? - why isn't this before the "if" statement */
170 exitshell(exitstatus);
177 * Read and execute commands. "Top" is nonzero for the top level command
178 * loop; it turns on prompting if the shell is interactive.
185 struct stackmark smark;
189 TRACE(("cmdloop(%d) called\n", top));
190 setstackmark(&smark);
197 showjobs(1, SHOWJOBS_DEFAULT);
202 /* showtree(n); DEBUG */
204 if (!top || numeof >= 50)
206 if (!stoppedjobs()) {
209 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
212 } else if (n != NULL && nflag == 0) {
213 job_warning = (job_warning == 2) ? 1 : 0;
217 popstackmark(&smark);
218 setstackmark(&smark);
220 if (evalskip == SKIPFILE)
225 popstackmark(&smark);
231 * Read /etc/profile or .profile. Return on error.
235 read_profile(const char *name)
238 const char *expandedname;
240 expandedname = expandstr(__DECONST(char *, name));
241 if (expandedname == NULL)
244 if ((fd = open(expandedname, O_RDONLY)) >= 0)
256 * Read a file containing shell functions.
260 readcmdfile(const char *name)
265 if ((fd = open(name, O_RDONLY)) >= 0)
268 error("cannot open %s: %s", name, strerror(errno));
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(const 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 const char *fullname;
313 error("missing filename");
318 * Because we have historically not supported any options,
319 * only treat "--" specially.
321 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
323 fullname = find_dot_file(filename);
324 setinputfile(fullname, 1);
325 commandname = fullname;
333 exitcmd(int argc, char **argv)
338 exitshell(number(argv[1]));
340 exitshell_savedstatus();