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Diffstat (limited to 'sh/main.c')
| -rw-r--r-- | sh/main.c | 394 |
1 files changed, 0 insertions, 394 deletions
diff --git a/sh/main.c b/sh/main.c deleted file mode 100644 index 43b154f..0000000 --- a/sh/main.c +++ /dev/null @@ -1,394 +0,0 @@ -/* $NetBSD: main.c,v 1.48 2003/09/14 12:09:29 jmmv Exp $ */ - -/*- - * 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. - * 3. 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. - */ - -#include <sys/cdefs.h> -#ifndef lint -__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 8.7 (Berkeley) 7/19/95"; -#else -__RCSID("$NetBSD: main.c,v 1.48 2003/09/14 12:09:29 jmmv Exp $"); -#endif -#endif /* not lint */ - -#include <errno.h> -#include <stdio.h> -#include <signal.h> -#include <sys/stat.h> -#include <unistd.h> -#include <fcntl.h> - - -#include "shell.h" -#include "main.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 "init.h" -#include "mystring.h" -#include "exec.h" -#include "cd.h" - -#define PROFILE 0 - -int rootpid; -int rootshell; -STATIC union node *curcmd; -STATIC union node *prevcmd; -#if PROFILE -short profile_buf[16384]; -extern int etext(); -#endif - -STATIC void read_profile(const char *); -STATIC char *find_dot_file(char *); -int main(int, 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 jmploc jmploc; - struct stackmark smark; - volatile int state; - char *shinit; - -#if PROFILE - monitor(4, etext, profile_buf, sizeof profile_buf, 50); -#endif - state = 0; - if (setjmp(jmploc.loc)) { - /* - * When a shell procedure is executed, we raise the - * exception EXSHELLPROC to clean up before executing - * the shell procedure. - */ - switch (exception) { - case EXSHELLPROC: - rootpid = getpid(); - rootshell = 1; - minusc = NULL; - state = 3; - break; - - case EXEXEC: - exitstatus = exerrno; - break; - - case EXERROR: - exitstatus = 2; - break; - - default: - break; - } - - if (exception != EXSHELLPROC) { - if (state == 0 || iflag == 0 || ! rootshell) - exitshell(exitstatus); - } - reset(); - if (exception == EXINT -#if ATTY - && (! attyset() || equal(termval(), "emacs")) -#endif - ) { - out2c('\n'); - flushout(&errout); - } - 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 = &jmploc; -#ifdef DEBUG -#if DEBUG == 2 - debug = 1; -#endif - opentrace(); - trputs("Shell args: "); trargs(argv); -#endif - rootpid = getpid(); - rootshell = 1; - init(); - setstackmark(&smark); - procargs(argc, argv); - if (argv[0] && argv[0][0] == '-') { - state = 1; - read_profile("/etc/profile"); -state1: - state = 2; - read_profile(".profile"); - } -state2: - state = 3; - if (getuid() == geteuid() && getgid() == getegid()) { - if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') { - state = 3; - read_profile(shinit); - } - } -state3: - state = 4; - if (sflag == 0 || minusc) { - static int sigs[] = { - SIGINT, SIGQUIT, SIGHUP, -#ifdef SIGTSTP - SIGTSTP, -#endif - SIGPIPE - }; -#define SIGSSIZE (sizeof(sigs)/sizeof(sigs[0])) - int i; - - for (i = 0; i < SIGSSIZE; i++) - setsignal(sigs[i], 0); - } - - if (minusc) - evalstring(minusc, 0); - - if (sflag || minusc == NULL) { -state4: /* XXX ??? - why isn't this before the "if" statement */ - cmdloop(1); - } -#if PROFILE - monitor(0); -#endif - exitshell(exitstatus); - /* NOTREACHED */ -} - - -/* - * Read and execute commands. "Top" is nonzero for the top level command - * loop; it turns on prompting if the shell is interactive. - */ - -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 (pendingsigs) - dotrap(); - inter = 0; - if (iflag && top) { - inter = 1; - showjobs(out2, SHOW_CHANGED); - flushout(&errout); - } - n = parsecmd(inter); - /* showtree(n); DEBUG */ - if (n == NEOF) { - if (!top || numeof >= 50) - break; - if (!stoppedjobs()) { - if (!Iflag) - break; - out2str("\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 == SKIPFILE) { - evalskip = 0; - break; - } - } - popstackmark(&smark); -} - - - -/* - * Read /etc/profile or .profile. Return on error. - */ - -STATIC void -read_profile(const char *name) -{ - int fd; - int xflag_set = 0; - int vflag_set = 0; - - INTOFF; - if ((fd = open(name, O_RDONLY)) >= 0) - setinputfd(fd, 1); - INTON; - if (fd < 0) - return; - /* -q turns off -x and -v just when executing init files */ - if (qflag) { - if (xflag) - xflag = 0, xflag_set = 1; - if (vflag) - vflag = 0, vflag_set = 1; - } - cmdloop(0); - if (qflag) { - if (xflag_set) - xflag = 1; - if (vflag_set) - vflag = 1; - } - popfile(); -} - - - -/* - * Read a file containing shell functions. - */ - -void -readcmdfile(char *name) -{ - int fd; - - INTOFF; - if ((fd = open(name, O_RDONLY)) >= 0) - setinputfd(fd, 1); - else - error("Can't open %s", name); - INTON; - 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); - } - - /* not found in the PATH */ - error("%s: not found", basename); - /* NOTREACHED */ -} - -int -dotcmd(int argc, char **argv) -{ - exitstatus = 0; - - if (argc >= 2) { /* That's what SVR2 does */ - char *fullname; - struct stackmark smark; - - setstackmark(&smark); - fullname = find_dot_file(argv[1]); - setinputfile(fullname, 1); - commandname = fullname; - cmdloop(0); - popfile(); - popstackmark(&smark); - } - return exitstatus; -} - - -int -exitcmd(int argc, char **argv) -{ - if (stoppedjobs()) - return 0; - if (argc > 1) - exitstatus = number(argv[1]); - exitshell(exitstatus); - /* NOTREACHED */ -} |