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 * 4. 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 247206 2013-02-23 22:50:57Z jilles $
69 struct jmploc main_handler;
70 int localeisutf8, initial_localeisutf8;
72 static void cmdloop(int);
73 static void read_profile(const char *);
74 static const char *find_dot_file(const char *);
77 * Main routine. We initialize things, parse the arguments, execute
78 * profiles if we're a login shell, and then call cmdloop to execute
79 * commands. The setjmp call sets up the location to jump to when an
80 * exception occurs. When an exception occurs the variable "state"
81 * is used to figure out how far we had gotten.
85 main(int argc, char *argv[])
87 struct stackmark smark, smark2;
91 setlocale(LC_ALL, "");
94 if (setjmp(main_handler.loc)) {
108 if (state == 0 || iflag == 0 || ! rootshell ||
110 exitshell(exitstatus);
112 if (exception == EXINT)
114 popstackmark(&smark);
115 FORCEINTON; /* enable interrupts */
125 handler = &main_handler;
128 trputs("Shell args: "); trargs(argv);
133 setstackmark(&smark);
134 setstackmark(&smark2);
135 procargs(argc, argv);
139 if (argv[0] && argv[0][0] == '-') {
141 read_profile("/etc/profile");
145 read_profile("${HOME-}/.profile");
147 read_profile("/etc/suid_profile");
151 if (!privileged && iflag) {
152 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
154 read_profile(shinit);
159 popstackmark(&smark2);
161 evalstring(minusc, sflag ? 0 : EV_EXIT);
163 if (sflag || minusc == NULL) {
164 state4: /* XXX ??? - why isn't this before the "if" statement */
167 exitshell(exitstatus);
174 * Read and execute commands. "Top" is nonzero for the top level command
175 * loop; it turns on prompting if the shell is interactive.
182 struct stackmark smark;
186 TRACE(("cmdloop(%d) called\n", top));
187 setstackmark(&smark);
194 showjobs(1, SHOWJOBS_DEFAULT);
199 /* showtree(n); DEBUG */
201 if (!top || numeof >= 50)
203 if (!stoppedjobs()) {
206 out2fmt_flush("\nUse \"exit\" to leave shell.\n");
209 } else if (n != NULL && nflag == 0) {
210 job_warning = (job_warning == 2) ? 1 : 0;
214 popstackmark(&smark);
215 setstackmark(&smark);
217 if (evalskip == SKIPFILE)
222 popstackmark(&smark);
228 * Read /etc/profile or .profile. Return on error.
232 read_profile(const char *name)
235 const char *expandedname;
237 expandedname = expandstr(__DECONST(char *, name));
238 if (expandedname == NULL)
241 if ((fd = open(expandedname, O_RDONLY)) >= 0)
253 * Read a file containing shell functions.
257 readcmdfile(const char *name)
259 setinputfile(name, 1);
267 * Take commands from a file. To be compatible we should do a path
268 * search for the file, which is necessary to find sub-commands.
273 find_dot_file(const char *basename)
276 const char *path = pathval();
279 /* don't try this for absolute or relative paths */
280 if( strchr(basename, '/'))
283 while ((fullname = padvance(&path, basename)) != NULL) {
284 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
286 * Don't bother freeing here, since it will
287 * be freed by the caller.
297 dotcmd(int argc, char **argv)
299 const char *fullname;
303 error("missing filename");
308 * Because we have historically not supported any options,
309 * only treat "--" specially.
311 filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
313 fullname = find_dot_file(filename);
314 setinputfile(fullname, 1);
315 commandname = fullname;
323 exitcmd(int argc, char **argv)
328 exitshell(number(argv[1]));
330 exitshell_savedstatus();