Remove 1sh

1 files changed, 0 insertions, 553 deletions

diff --git a/bin/1sh/trap.c b/bin/1sh/trap.c
deleted file mode 100644
index fed13fcf..00000000
--- a/bin/1sh/trap.c
+++ /dev/null
@@ -1,553 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * 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.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)trap.c	8.5 (Berkeley) 6/5/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-/* $FreeBSD: releng/12.1/bin/sh/trap.c 326025 2017-11-20 19:49:47Z pfg $ */
-
-#include <signal.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#include "shell.h"
-#include "main.h"
-#include "nodes.h"	/* for other headers */
-#include "eval.h"
-#include "jobs.h"
-#include "show.h"
-#include "options.h"
-#include "syntax.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "trap.h"
-#include "mystring.h"
-#include "builtins.h"
-#include "myhistedit.h"
-
-
-/*
- * Sigmode records the current value of the signal handlers for the various
- * modes.  A value of zero means that the current handler is not known.
- * S_HARD_IGN indicates that the signal was ignored on entry to the shell,
- */
-
-#define S_DFL 1			/* default signal handling (SIG_DFL) */
-#define S_CATCH 2		/* signal is caught */
-#define S_IGN 3			/* signal is ignored (SIG_IGN) */
-#define S_HARD_IGN 4		/* signal is ignored permanently */
-#define S_RESET 5		/* temporary - to reset a hard ignored sig */
-
-
-static char sigmode[NSIG];	/* current value of signal */
-volatile sig_atomic_t pendingsig;	/* indicates some signal received */
-volatile sig_atomic_t pendingsig_waitcmd;	/* indicates wait builtin should be interrupted */
-static int in_dotrap;			/* do we execute in a trap handler? */
-static char *volatile trap[NSIG];	/* trap handler commands */
-static volatile sig_atomic_t gotsig[NSIG];
-				/* indicates specified signal received */
-static int ignore_sigchld;	/* Used while handling SIGCHLD traps. */
-static int last_trapsig;
-
-static int exiting;		/* exitshell() has been called */
-static int exiting_exitstatus;	/* value passed to exitshell() */
-
-static int getsigaction(int, sig_t *);
-
-
-/*
- * Map a string to a signal number.
- *
- * Note: the signal number may exceed NSIG.
- */
-static int
-sigstring_to_signum(char *sig)
-{
-
-	if (is_number(sig)) {
-		int signo;
-
-		signo = atoi(sig);
-		return ((signo >= 0 && signo < NSIG) ? signo : (-1));
-	} else if (strcasecmp(sig, "EXIT") == 0) {
-		return (0);
-	} else {
-		int n;
-
-		if (strncasecmp(sig, "SIG", 3) == 0)
-			sig += 3;
-		for (n = 1; n < NSIG; n++)
-			if (sys_signame[n] &&
-			    strcasecmp(sys_signame[n], sig) == 0)
-				return (n);
-	}
-	return (-1);
-}
-
-
-/*
- * Print a list of valid signal names.
- */
-static void
-printsignals(void)
-{
-	int n, outlen;
-
-	outlen = 0;
-	for (n = 1; n < NSIG; n++) {
-		if (sys_signame[n]) {
-			out1fmt("%s", sys_signame[n]);
-			outlen += strlen(sys_signame[n]);
-		} else {
-			out1fmt("%d", n);
-			outlen += 3;	/* good enough */
-		}
-		++outlen;
-		if (outlen > 71 || n == NSIG - 1) {
-			out1str("\n");
-			outlen = 0;
-		} else {
-			out1c(' ');
-		}
-	}
-}
-
-
-/*
- * The trap builtin.
- */
-int
-trapcmd(int argc __unused, char **argv)
-{
-	char *action;
-	int signo;
-	int errors = 0;
-	int i;
-
-	while ((i = nextopt("l")) != '\0') {
-		switch (i) {
-		case 'l':
-			printsignals();
-			return (0);
-		}
-	}
-	argv = argptr;
-
-	if (*argv == NULL) {
-		for (signo = 0 ; signo < NSIG ; signo++) {
-			if (signo < NSIG && trap[signo] != NULL) {
-				out1str("trap -- ");
-				out1qstr(trap[signo]);
-				if (signo == 0) {
-					out1str(" EXIT\n");
-				} else if (sys_signame[signo]) {
-					out1fmt(" %s\n", sys_signame[signo]);
-				} else {
-					out1fmt(" %d\n", signo);
-				}
-			}
-		}
-		return 0;
-	}
-	action = NULL;
-	if (*argv && !is_number(*argv)) {
-		if (strcmp(*argv, "-") == 0)
-			argv++;
-		else {
-			action = *argv;
-			argv++;
-		}
-	}
-	for (; *argv; argv++) {
-		if ((signo = sigstring_to_signum(*argv)) == -1) {
-			warning("bad signal %s", *argv);
-			errors = 1;
-			continue;
-		}
-		INTOFF;
-		if (action)
-			action = savestr(action);
-		if (trap[signo])
-			ckfree(trap[signo]);
-		trap[signo] = action;
-		if (signo != 0)
-			setsignal(signo);
-		INTON;
-	}
-	return errors;
-}
-
-
-/*
- * Clear traps on a fork.
- */
-void
-clear_traps(void)
-{
-	char *volatile *tp;
-
-	for (tp = trap ; tp <= &trap[NSIG - 1] ; tp++) {
-		if (*tp && **tp) {	/* trap not NULL or SIG_IGN */
-			INTOFF;
-			ckfree(*tp);
-			*tp = NULL;
-			if (tp != &trap[0])
-				setsignal(tp - trap);
-			INTON;
-		}
-	}
-}
-
-
-/*
- * Check if we have any traps enabled.
- */
-int
-have_traps(void)
-{
-	char *volatile *tp;
-
-	for (tp = trap ; tp <= &trap[NSIG - 1] ; tp++) {
-		if (*tp && **tp)	/* trap not NULL or SIG_IGN */
-			return 1;
-	}
-	return 0;
-}
-
-/*
- * Set the signal handler for the specified signal.  The routine figures
- * out what it should be set to.
- */
-void
-setsignal(int signo)
-{
-	int action;
-	sig_t sigact = SIG_DFL;
-	struct sigaction sa;
-	char *t;
-
-	if ((t = trap[signo]) == NULL)
-		action = S_DFL;
-	else if (*t != '\0')
-		action = S_CATCH;
-	else
-		action = S_IGN;
-	if (action == S_DFL) {
-		switch (signo) {
-		case SIGINT:
-			action = S_CATCH;
-			break;
-		case SIGQUIT:
-#ifdef DEBUG
-			{
-			extern int debug;
-
-			if (debug)
-				break;
-			}
-#endif
-			action = S_CATCH;
-			break;
-		case SIGTERM:
-			if (rootshell && iflag)
-				action = S_IGN;
-			break;
-#if JOBS
-		case SIGTSTP:
-		case SIGTTOU:
-			if (rootshell && mflag)
-				action = S_IGN;
-			break;
-#endif
-		}
-	}
-
-	t = &sigmode[signo];
-	if (*t == 0) {
-		/*
-		 * current setting unknown
-		 */
-		if (!getsigaction(signo, &sigact)) {
-			/*
-			 * Pretend it worked; maybe we should give a warning
-			 * here, but other shells don't. We don't alter
-			 * sigmode, so that we retry every time.
-			 */
-			return;
-		}
-		if (sigact == SIG_IGN) {
-			if (mflag && (signo == SIGTSTP ||
-			     signo == SIGTTIN || signo == SIGTTOU)) {
-				*t = S_IGN;	/* don't hard ignore these */
-			} else
-				*t = S_HARD_IGN;
-		} else {
-			*t = S_RESET;	/* force to be set */
-		}
-	}
-	if (*t == S_HARD_IGN || *t == action)
-		return;
-	switch (action) {
-		case S_DFL:	sigact = SIG_DFL;	break;
-		case S_CATCH:  	sigact = onsig;		break;
-		case S_IGN:	sigact = SIG_IGN;	break;
-	}
-	*t = action;
-	sa.sa_handler = sigact;
-	sa.sa_flags = 0;
-	sigemptyset(&sa.sa_mask);
-	sigaction(signo, &sa, NULL);
-}
-
-
-/*
- * Return the current setting for sig w/o changing it.
- */
-static int
-getsigaction(int signo, sig_t *sigact)
-{
-	struct sigaction sa;
-
-	if (sigaction(signo, (struct sigaction *)0, &sa) == -1)
-		return 0;
-	*sigact = (sig_t) sa.sa_handler;
-	return 1;
-}
-
-
-/*
- * Ignore a signal.
- */
-void
-ignoresig(int signo)
-{
-
-	if (sigmode[signo] == 0)
-		setsignal(signo);
-	if (sigmode[signo] != S_IGN && sigmode[signo] != S_HARD_IGN) {
-		signal(signo, SIG_IGN);
-		sigmode[signo] = S_IGN;
-	}
-}
-
-
-int
-issigchldtrapped(void)
-{
-
-	return (trap[SIGCHLD] != NULL && *trap[SIGCHLD] != '\0');
-}
-
-
-/*
- * Signal handler.
- */
-void
-onsig(int signo)
-{
-
-	if (signo == SIGINT && trap[SIGINT] == NULL) {
-		/*
-		 * The !in_dotrap here is safe.  The only way we can arrive
-		 * here with in_dotrap set is that a trap handler set SIGINT to
-		 * SIG_DFL and killed itself.
-		 */
-		if (suppressint && !in_dotrap)
-			SET_PENDING_INT;
-		else
-			onint();
-		return;
-	}
-
-	/* If we are currently in a wait builtin, prepare to break it */
-	if (signo == SIGINT || signo == SIGQUIT)
-		pendingsig_waitcmd = signo;
-
-	if (trap[signo] != NULL && trap[signo][0] != '\0' &&
-	    (signo != SIGCHLD || !ignore_sigchld)) {
-		gotsig[signo] = 1;
-		pendingsig = signo;
-		pendingsig_waitcmd = signo;
-	}
-}
-
-
-/*
- * Called to execute a trap.  Perhaps we should avoid entering new trap
- * handlers while we are executing a trap handler.
- */
-void
-dotrap(void)
-{
-	struct stackmark smark;
-	int i;
-	int savestatus, prev_evalskip, prev_skipcount;
-
-	in_dotrap++;
-	for (;;) {
-		pendingsig = 0;
-		pendingsig_waitcmd = 0;
-		for (i = 1; i < NSIG; i++) {
-			if (gotsig[i]) {
-				gotsig[i] = 0;
-				if (trap[i]) {
-					/*
-					 * Ignore SIGCHLD to avoid infinite
-					 * recursion if the trap action does
-					 * a fork.
-					 */
-					if (i == SIGCHLD)
-						ignore_sigchld++;
-
-					/*
-					 * Backup current evalskip
-					 * state and reset it before
-					 * executing a trap, so that the
-					 * trap is not disturbed by an
-					 * ongoing break/continue/return
-					 * statement.
-					 */
-					prev_evalskip  = evalskip;
-					prev_skipcount = skipcount;
-					evalskip = 0;
-
-					last_trapsig = i;
-					savestatus = exitstatus;
-					setstackmark(&smark);
-					evalstring(stsavestr(trap[i]), 0);
-					popstackmark(&smark);
-
-					/*
-					 * If such a command was not
-					 * already in progress, allow a
-					 * break/continue/return in the
-					 * trap action to have an effect
-					 * outside of it.
-					 */
-					if (evalskip == 0 ||
-					    prev_evalskip != 0) {
-						evalskip  = prev_evalskip;
-						skipcount = prev_skipcount;
-						exitstatus = savestatus;
-					}
-
-					if (i == SIGCHLD)
-						ignore_sigchld--;
-				}
-				break;
-			}
-		}
-		if (i >= NSIG)
-			break;
-	}
-	in_dotrap--;
-}
-
-
-/*
- * Controls whether the shell is interactive or not based on iflag.
- */
-void
-setinteractive(void)
-{
-	setsignal(SIGINT);
-	setsignal(SIGQUIT);
-	setsignal(SIGTERM);
-}
-
-
-/*
- * Called to exit the shell.
- */
-void
-exitshell(int status)
-{
-	TRACE(("exitshell(%d) pid=%d\n", status, getpid()));
-	exiting = 1;
-	exiting_exitstatus = status;
-	exitshell_savedstatus();
-}
-
-void
-exitshell_savedstatus(void)
-{
-	struct jmploc loc1, loc2;
-	char *p;
-	int sig = 0;
-	sigset_t sigs;
-
-	if (!exiting) {
-		if (in_dotrap && last_trapsig) {
-			sig = last_trapsig;
-			exiting_exitstatus = sig + 128;
-		} else
-			exiting_exitstatus = oexitstatus;
-	}
-	exitstatus = oexitstatus = exiting_exitstatus;
-	if (!setjmp(loc1.loc)) {
-		handler = &loc1;
-		if ((p = trap[0]) != NULL && *p != '\0') {
-			/*
-			 * Reset evalskip, or the trap on EXIT could be
-			 * interrupted if the last command was a "return".
-			 */
-			evalskip = 0;
-			trap[0] = NULL;
-			FORCEINTON;
-			evalstring(p, 0);
-		}
-	}
-	if (!setjmp(loc2.loc)) {
-		handler = &loc2;		/* probably unnecessary */
-		FORCEINTON;
-		flushall();
-#if JOBS
-		setjobctl(0);
-#endif
-	}
-	if (sig != 0 && sig != SIGSTOP && sig != SIGTSTP && sig != SIGTTIN &&
-	    sig != SIGTTOU) {
-		signal(sig, SIG_DFL);
-		sigemptyset(&sigs);
-		sigaddset(&sigs, sig);
-		sigprocmask(SIG_UNBLOCK, &sigs, NULL);
-		kill(getpid(), sig);
-		/* If the default action is to ignore, fall back to _exit(). */
-	}
-	_exit(exiting_exitstatus);
-}