--- /dev/null
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char const copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/28/95";
+#endif
+#endif /* not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+#include <signal.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <locale.h>
+#include <errno.h>
+
+#include "shell.h"
+#include "main.h"
+#include "mail.h"
+#include "options.h"
+#include "output.h"
+#include "parser.h"
+#include "nodes.h"
+#include "expand.h"
+#include "eval.h"
+#include "jobs.h"
+#include "input.h"
+#include "trap.h"
+#include "var.h"
+#include "show.h"
+#include "memalloc.h"
+#include "error.h"
+#include "mystring.h"
+#include "exec.h"
+#include "cd.h"
+#include "redir.h"
+#include "builtins.h"
+
+int rootpid;
+int rootshell;
+struct jmploc main_handler;
+int localeisutf8, initial_localeisutf8;
+
+static void reset(void);
+static void cmdloop(int);
+static void read_profile(const char *);
+static char *find_dot_file(char *);
+
+/*
+ * Main routine. We initialize things, parse the arguments, execute
+ * profiles if we're a login shell, and then call cmdloop to execute
+ * commands. The setjmp call sets up the location to jump to when an
+ * exception occurs. When an exception occurs the variable "state"
+ * is used to figure out how far we had gotten.
+ */
+
+int
+main(int argc, char *argv[])
+{
+ struct stackmark smark, smark2;
+ volatile int state;
+ char *shinit;
+
+ (void) setlocale(LC_ALL, "");
+ initcharset();
+ state = 0;
+ if (setjmp(main_handler.loc)) {
+ switch (exception) {
+ case EXEXEC:
+ exitstatus = exerrno;
+ break;
+
+ case EXERROR:
+ exitstatus = 2;
+ break;
+
+ default:
+ break;
+ }
+
+ if (state == 0 || iflag == 0 || ! rootshell ||
+ exception == EXEXIT)
+ exitshell(exitstatus);
+ reset();
+ if (exception == EXINT)
+ out2fmt_flush("\n");
+ popstackmark(&smark);
+ FORCEINTON; /* enable interrupts */
+ if (state == 1)
+ goto state1;
+ else if (state == 2)
+ goto state2;
+ else if (state == 3)
+ goto state3;
+ else
+ goto state4;
+ }
+ handler = &main_handler;
+#ifdef DEBUG
+ opentrace();
+ trputs("Shell args: "); trargs(argv);
+#endif
+ rootpid = getpid();
+ rootshell = 1;
+ INTOFF;
+ initvar();
+ setstackmark(&smark);
+ setstackmark(&smark2);
+ procargs(argc, argv);
+ pwd_init(iflag);
+ INTON;
+ if (iflag)
+ chkmail(1);
+ if (argv[0] && argv[0][0] == '-') {
+ state = 1;
+ read_profile("/etc/profile");
+state1:
+ state = 2;
+ if (privileged == 0)
+ read_profile("${HOME-}/.profile");
+ else
+ read_profile("/etc/suid_profile");
+ }
+state2:
+ state = 3;
+ if (!privileged && iflag) {
+ if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
+ state = 3;
+ read_profile(shinit);
+ }
+ }
+state3:
+ state = 4;
+ popstackmark(&smark2);
+ if (minusc) {
+ evalstring(minusc, sflag ? 0 : EV_EXIT);
+ }
+state4:
+ if (sflag || minusc == NULL) {
+ cmdloop(1);
+ }
+ exitshell(exitstatus);
+ /*NOTREACHED*/
+ return 0;
+}
+
+static void
+reset(void)
+{
+ reseteval();
+ resetinput();
+}
+
+/*
+ * Read and execute commands. "Top" is nonzero for the top level command
+ * loop; it turns on prompting if the shell is interactive.
+ */
+
+static void
+cmdloop(int top)
+{
+ union node *n;
+ struct stackmark smark;
+ int inter;
+ int numeof = 0;
+
+ TRACE(("cmdloop(%d) called\n", top));
+ setstackmark(&smark);
+ for (;;) {
+ if (pendingsig)
+ dotrap();
+ inter = 0;
+ if (iflag && top) {
+ inter++;
+ showjobs(1, SHOWJOBS_DEFAULT);
+ chkmail(0);
+ flushout(&output);
+ }
+ n = parsecmd(inter);
+ /* showtree(n); DEBUG */
+ if (n == NEOF) {
+ if (!top || numeof >= 50)
+ break;
+ if (!stoppedjobs()) {
+ if (!Iflag)
+ break;
+ out2fmt_flush("\nUse \"exit\" to leave shell.\n");
+ }
+ numeof++;
+ } else if (n != NULL && nflag == 0) {
+ job_warning = (job_warning == 2) ? 1 : 0;
+ numeof = 0;
+ evaltree(n, 0);
+ }
+ popstackmark(&smark);
+ setstackmark(&smark);
+ if (evalskip != 0) {
+ if (evalskip == SKIPRETURN)
+ evalskip = 0;
+ break;
+ }
+ }
+ popstackmark(&smark);
+}
+
+
+
+/*
+ * Read /etc/profile or .profile. Return on error.
+ */
+
+static void
+read_profile(const char *name)
+{
+ int fd;
+ const char *expandedname;
+
+ expandedname = expandstr(name);
+ if (expandedname == NULL)
+ return;
+ INTOFF;
+ if ((fd = open(expandedname, O_RDONLY | O_CLOEXEC)) >= 0)
+ setinputfd(fd, 1);
+ INTON;
+ if (fd < 0)
+ return;
+ cmdloop(0);
+ popfile();
+}
+
+
+
+/*
+ * Read a file containing shell functions.
+ */
+
+void
+readcmdfile(const char *name)
+{
+ setinputfile(name, 1);
+ cmdloop(0);
+ popfile();
+}
+
+
+
+/*
+ * Take commands from a file. To be compatible we should do a path
+ * search for the file, which is necessary to find sub-commands.
+ */
+
+
+static char *
+find_dot_file(char *basename)
+{
+ char *fullname;
+ const char *path = pathval();
+ struct stat statb;
+
+ /* don't try this for absolute or relative paths */
+ if( strchr(basename, '/'))
+ return basename;
+
+ while ((fullname = padvance(&path, basename)) != NULL) {
+ if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
+ /*
+ * Don't bother freeing here, since it will
+ * be freed by the caller.
+ */
+ return fullname;
+ }
+ stunalloc(fullname);
+ }
+ return basename;
+}
+
+int
+dotcmd(int argc, char **argv)
+{
+ char *filename, *fullname;
+
+ if (argc < 2)
+ error("missing filename");
+
+ exitstatus = 0;
+
+ /*
+ * Because we have historically not supported any options,
+ * only treat "--" specially.
+ */
+ filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
+
+ fullname = find_dot_file(filename);
+ setinputfile(fullname, 1);
+ commandname = fullname;
+ cmdloop(0);
+ popfile();
+ return exitstatus;
+}
+
+
+int
+exitcmd(int argc, char **argv)
+{
+ if (stoppedjobs())
+ return 0;
+ if (argc > 1)
+ exitshell(number(argv[1]));
+ else
+ exitshell_savedstatus();
+}
projects / apple / shell_cmds.git / blobdiff