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/* $NetBSD: main.c,v 1.48 2003/09/14 12:09:29 jmmv Exp $ */
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* This code is derived from software contributed to Berkeley by
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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#include <sys/cdefs.h>
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#define __COPYRIGHT(arg)
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__COPYRIGHT("@(#) Copyright (c) 1991, 1993\n\
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The Regents of the University of California. All rights reserved.\n");
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static char sccsid[] = "@(#)main.c 8.7 (Berkeley) 7/19/95";
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__RCSID("$NetBSD: main.c,v 1.48 2003/09/14 12:09:29 jmmv Exp $");
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STATIC union node *curcmd;
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STATIC union node *prevcmd;
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short profile_buf[16384];
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STATIC void read_profile(const char *);
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STATIC char *find_dot_file(char *);
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int main(int, char **);
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* Main routine. We initialize things, parse the arguments, execute
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* profiles if we're a login shell, and then call cmdloop to execute
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* commands. The setjmp call sets up the location to jump to when an
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* exception occurs. When an exception occurs the variable "state"
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* is used to figure out how far we had gotten.
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main(int argc, char **argv)
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struct jmploc jmploc;
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struct stackmark smark;
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setlocale(LC_ALL, "");
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monitor(4, etext, profile_buf, sizeof profile_buf, 50);
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if (setjmp(jmploc.loc)) {
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* When a shell procedure is executed, we raise the
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* exception EXSHELLPROC to clean up before executing
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* the shell procedure.
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exitstatus = exerrno;
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if (exception != EXSHELLPROC) {
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if (state == 0 || iflag == 0 || ! rootshell)
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exitshell(exitstatus);
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if (exception == EXINT
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&& (! attyset() || equal(termval(), "emacs"))
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popstackmark(&smark);
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FORCEINTON; /* enable interrupts */
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trputs("Shell args: "); trargs(argv);
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setstackmark(&smark);
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procargs(argc, argv);
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if (argv[0] && argv[0][0] == '-') {
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read_profile("/etc/profile");
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read_profile(".profile");
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if (getuid() == geteuid() && getgid() == getegid()) {
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if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
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read_profile(shinit);
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if (sflag == 0 || minusc) {
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static int sigs[] = {
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SIGINT, SIGQUIT, SIGHUP,
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#define SIGSSIZE (sizeof(sigs)/sizeof(sigs[0]))
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for (i = 0; i < SIGSSIZE; i++)
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setsignal(sigs[i], 0);
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evalstring(minusc, 0);
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if (sflag || minusc == NULL) {
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state4: /* XXX ??? - why isn't this before the "if" statement */
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exitshell(exitstatus);
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* Read and execute commands. "Top" is nonzero for the top level command
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* loop; it turns on prompting if the shell is interactive.
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struct stackmark smark;
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TRACE(("cmdloop(%d) called\n", top));
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setstackmark(&smark);
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showjobs(out2, SHOW_CHANGED);
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/* showtree(n); DEBUG */
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if (!top || numeof >= 50)
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if (!stoppedjobs()) {
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out2str("\nUse \"exit\" to leave shell.\n");
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} else if (n != NULL && nflag == 0) {
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job_warning = (job_warning == 2) ? 1 : 0;
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popstackmark(&smark);
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setstackmark(&smark);
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if (evalskip == SKIPFILE) {
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popstackmark(&smark);
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* Read /etc/profile or .profile. Return on error.
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read_profile(const char *name)
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if ((fd = open(name, O_RDONLY)) >= 0)
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/* -q turns off -x and -v just when executing init files */
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xflag = 0, xflag_set = 1;
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vflag = 0, vflag_set = 1;
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* Read a file containing shell functions.
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readcmdfile(char *name)
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if ((fd = open(name, O_RDONLY)) >= 0)
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error("Can't open %s", name);
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* Take commands from a file. To be compatible we should do a path
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* search for the file, which is necessary to find sub-commands.
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find_dot_file(char *basename)
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const char *path = pathval();
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/* don't try this for absolute or relative paths */
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if (strchr(basename, '/'))
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while ((fullname = padvance(&path, basename)) != NULL) {
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if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
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* Don't bother freeing here, since it will
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* be freed by the caller.
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/* not found in the PATH */
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error("%s: not found", basename);
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dotcmd(int argc, char **argv)
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if (argc >= 2) { /* That's what SVR2 does */
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struct stackmark smark;
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setstackmark(&smark);
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fullname = find_dot_file(argv[1]);
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setinputfile(fullname, 1);
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commandname = fullname;
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popstackmark(&smark);
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exitcmd(int argc, char **argv)
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exitstatus = number(argv[1]);
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exitshell(exitstatus);
added
removed
ash/main.c
