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
35 static char sccsid
[] = "@(#)main.c 8.6 (Berkeley) 5/28/95";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
73 struct jmploc main_handler
;
74 int localeisutf8
, initial_localeisutf8
;
76 static void reset(void);
77 static void cmdloop(int);
78 static void read_profile(const char *);
79 static char *find_dot_file(char *);
82 * Main routine. We initialize things, parse the arguments, execute
83 * profiles if we're a login shell, and then call cmdloop to execute
84 * commands. The setjmp call sets up the location to jump to when an
85 * exception occurs. When an exception occurs the variable "state"
86 * is used to figure out how far we had gotten.
90 main(int argc
, char *argv
[])
92 struct stackmark smark
, smark2
;
96 (void) setlocale(LC_ALL
, "");
99 if (setjmp(main_handler
.loc
)) {
102 exitstatus
= exerrno
;
113 if (state
== 0 || iflag
== 0 || ! rootshell
||
115 exitshell(exitstatus
);
117 if (exception
== EXINT
)
119 popstackmark(&smark
);
120 FORCEINTON
; /* enable interrupts */
130 handler
= &main_handler
;
133 trputs("Shell args: "); trargs(argv
);
139 setstackmark(&smark
);
140 setstackmark(&smark2
);
141 procargs(argc
, argv
);
146 if (argv
[0] && argv
[0][0] == '-') {
148 read_profile("/etc/profile");
152 read_profile("${HOME-}/.profile");
154 read_profile("/etc/suid_profile");
158 if (!privileged
&& iflag
) {
159 if ((shinit
= lookupvar("ENV")) != NULL
&& *shinit
!= '\0') {
161 read_profile(shinit
);
166 popstackmark(&smark2
);
168 evalstring(minusc
, sflag
? 0 : EV_EXIT
);
171 if (sflag
|| minusc
== NULL
) {
174 exitshell(exitstatus
);
187 * Read and execute commands. "Top" is nonzero for the top level command
188 * loop; it turns on prompting if the shell is interactive.
195 struct stackmark smark
;
199 TRACE(("cmdloop(%d) called\n", top
));
200 setstackmark(&smark
);
207 showjobs(1, SHOWJOBS_DEFAULT
);
212 /* showtree(n); DEBUG */
214 if (!top
|| numeof
>= 50)
216 if (!stoppedjobs()) {
219 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
222 } else if (n
!= NULL
&& nflag
== 0) {
223 job_warning
= (job_warning
== 2) ? 1 : 0;
227 popstackmark(&smark
);
228 setstackmark(&smark
);
230 if (evalskip
== SKIPRETURN
)
235 popstackmark(&smark
);
241 * Read /etc/profile or .profile. Return on error.
245 read_profile(const char *name
)
248 const char *expandedname
;
250 expandedname
= expandstr(name
);
251 if (expandedname
== NULL
)
254 if ((fd
= open(expandedname
, O_RDONLY
| O_CLOEXEC_MAYBE
)) >= 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(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 char *filename
, *fullname
;
315 error("missing filename");
320 * Because we have historically not supported any options,
321 * only treat "--" specially.
323 filename
= argc
> 2 && strcmp(argv
[1], "--") == 0 ? argv
[2] : argv
[1];
325 fullname
= find_dot_file(filename
);
326 setinputfile(fullname
, 1);
327 commandname
= fullname
;
335 exitcmd(int argc
, char **argv
)
340 exitshell(number(argv
[1]));
342 exitshell_savedstatus();