2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 static char sccsid
[] = "@(#)main.c 8.6 (Berkeley) 5/28/95";
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD: head/bin/sh/main.c 364919 2020-08-28 15:35:45Z jilles $");
75 struct jmploc main_handler
;
76 int localeisutf8
, initial_localeisutf8
;
78 static void reset(void);
79 static void cmdloop(int);
80 static void read_profile(const char *);
81 static char *find_dot_file(char *);
84 * Main routine. We initialize things, parse the arguments, execute
85 * profiles if we're a login shell, and then call cmdloop to execute
86 * commands. The setjmp call sets up the location to jump to when an
87 * exception occurs. When an exception occurs the variable "state"
88 * is used to figure out how far we had gotten.
92 main(int argc
, char *argv
[])
94 struct stackmark smark
, smark2
;
98 (void) setlocale(LC_ALL
, "");
101 if (setjmp(main_handler
.loc
)) {
102 if (state
== 0 || iflag
== 0 || ! rootshell
||
104 exitshell(exitstatus
);
106 if (exception
== EXINT
)
108 popstackmark(&smark
);
109 FORCEINTON
; /* enable interrupts */
119 handler
= &main_handler
;
122 trputs("Shell args: "); trargs(argv
);
128 setstackmark(&smark
);
129 setstackmark(&smark2
);
130 procargs(argc
, argv
);
136 if (argv
[0] && argv
[0][0] == '-') {
138 read_profile("/etc/profile");
142 read_profile("${HOME-}/.profile");
144 read_profile("/etc/suid_profile");
148 if (!privileged
&& iflag
) {
149 if ((shinit
= lookupvar("ENV")) != NULL
&& *shinit
!= '\0') {
151 read_profile(shinit
);
156 popstackmark(&smark2
);
158 evalstring(minusc
, sflag
? 0 : EV_EXIT
);
161 if (sflag
|| minusc
== NULL
) {
164 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
== SKIPRETURN
)
225 popstackmark(&smark
);
235 * Read /etc/profile or .profile. Return on error.
239 read_profile(const char *name
)
242 const char *expandedname
;
244 expandedname
= expandstr(name
);
245 if (expandedname
== NULL
)
248 if ((fd
= open(expandedname
, O_RDONLY
| O_CLOEXEC_MAYBE
)) >= 0)
260 * Read a file containing shell functions.
264 readcmdfile(const char *name
)
266 setinputfile(name
, 1);
274 * Take commands from a file. To be compatible we should do a path
275 * search for the file, which is necessary to find sub-commands.
280 find_dot_file(char *basename
)
284 const char *path
= pathval();
287 /* don't try this for absolute or relative paths */
288 if( strchr(basename
, '/'))
291 while ((fullname
= padvance(&path
, &opt
, basename
)) != NULL
) {
292 if ((stat(fullname
, &statb
) == 0) && S_ISREG(statb
.st_mode
)) {
294 * Don't bother freeing here, since it will
295 * be freed by the caller.
305 dotcmd(int argc
, char **argv
)
307 char *filename
, *fullname
;
310 error("missing filename");
315 * Because we have historically not supported any options,
316 * only treat "--" specially.
318 filename
= argc
> 2 && strcmp(argv
[1], "--") == 0 ? argv
[2] : argv
[1];
320 fullname
= find_dot_file(filename
);
321 setinputfile(fullname
, 1);
322 commandname
= fullname
;
330 exitcmd(int argc
, char **argv
)
335 exitshell(number(argv
[1]));
337 exitshell_savedstatus();