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. 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
32 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved.
33 * @(#)main.c 8.6 (Berkeley) 5/28/95
34 * $FreeBSD: head/bin/sh/main.c 253650 2013-07-25 15:08:41Z jilles $
69 struct jmploc main_handler;
70 int localeisutf8, initial_localeisutf8;
72 static void reset(void);
73 static void cmdloop(int);
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, smark2;
92 setlocale(LC_ALL, "");
95 if (setjmp(main_handler.loc)) {
109 if (state == 0 || iflag == 0 || ! rootshell ||
111 exitshell(exitstatus);
113 if (exception == EXINT)
115 popstackmark(&smark);
116 FORCEINTON; /* enable interrupts */
126 handler = &main_handler;
129 trputs("Shell args: "); trargs(argv);
134 setstackmark(&smark);
135 setstackmark(&smark2);
136 procargs(argc, argv);
140 if (argv[0] && argv[0][0] == '-') {
142 read_profile("/etc/profile");
146 read_profile("${HOME-}/.profile");
148 read_profile("/etc/suid_profile");
152 if (!privileged && iflag) {
153 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
155 read_profile(shinit);
160 popstackmark(&smark2);
162 evalstring(minusc, sflag ? 0 : EV_EXIT);
165 if (sflag || minusc == NULL) {
168 exitshell(exitstatus);
183 * Read and execute commands. "Top" is nonzero for the top level command
184 * loop; it turns on prompting if the shell is interactive.
191 struct stackmark smark;
195 TRACE(("cmdloop(%d) called\n", top));
196 setstackmark(&smark);
203 showjobs(1, SHOWJOBS_DEFAULT);
208 /* showtree(n); DEBUG */
210 if (!top || numeof >= 50)
212 if (!stoppedjobs()) {
215 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
218 } else if (n != NULL && nflag == 0) {
219 job_warning = (job_warning == 2) ? 1 : 0;
223 popstackmark(&smark);
224 setstackmark(&smark);
226 if (evalskip == SKIPFILE)
231 popstackmark(&smark);
237 * Read /etc/profile or .profile. Return on error.
241 read_profile(const char *name)
244 const char *expandedname;
246 expandedname = expandstr(__DECONST(char *, name));
247 if (expandedname == NULL)
251 if ((fd = open(expandedname, O_RDONLY)) >= 0)
253 if ((fd = open(expandedname, O_RDONLY | O_CLOEXEC)) >= 0)
266 * Read a file containing shell functions.
270 readcmdfile(const char *name)
272 setinputfile(name, 1);
280 * Take commands from a file. To be compatible we should do a path
281 * search for the file, which is necessary to find sub-commands.
286 find_dot_file(const char *basename)
289 const char *path = pathval();
292 /* don't try this for absolute or relative paths */
293 if( strchr(basename, '/'))
296 while ((fullname = padvance(&path, basename)) != NULL) {
297 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
299 * Don't bother freeing here, since it will
300 * be freed by the caller.
310 dotcmd(int argc, char **argv)
312 const char *fullname;
316 error("missing filename");
321 * Because we have historically not supported any options,
322 * only treat "--" specially.
324 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
326 fullname = find_dot_file(filename);
327 setinputfile(fullname, 1);
328 commandname = fullname;
336 exitcmd(int argc, char **argv)
341 exitshell(number(argv[1]));
343 exitshell_savedstatus();