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-rw-r--r--bin/dash/src/trap.c446
1 files changed, 0 insertions, 446 deletions
diff --git a/bin/dash/src/trap.c b/bin/dash/src/trap.c
deleted file mode 100644
index cd84814f..00000000
--- a/bin/dash/src/trap.c
+++ /dev/null
@@ -1,446 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- * Copyright (c) 1997-2005
- *	Herbert Xu <herbert@gondor.apana.org.au>.  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 <signal.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "shell.h"
-#include "main.h"
-#include "nodes.h"	/* for other headers */
-#include "eval.h"
-#include "init.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"
-
-/*
- * 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 permenantly */
-#define S_RESET 5		/* temporary - to reset a hard ignored sig */
-
-
-/* trap handler commands */
-MKINIT char *trap[NSIG];
-/* number of non-null traps */
-int trapcnt;
-/* current value of signal */
-char sigmode[NSIG - 1];
-/* indicates specified signal received */
-static char gotsig[NSIG - 1];
-/* last pending signal */
-volatile sig_atomic_t pending_sig;
-/* received SIGCHLD */
-volatile sig_atomic_t gotsigchld;
-
-extern char *signal_names[];
-
-static int decode_signum(const char *);
-
-#ifdef mkinit
-INCLUDE "memalloc.h"
-INCLUDE "trap.h"
-
-INIT {
-	sigmode[SIGCHLD - 1] = S_DFL;
-	setsignal(SIGCHLD);
-}
-
-FORKRESET {
-	char **tp;
-
-	INTOFF;
-	for (tp = trap ; tp < &trap[NSIG] ; tp++) {
-		if (*tp && **tp) {	/* trap not NULL or SIG_IGN */
-			ckfree(*tp);
-			*tp = NULL;
-			if (tp != &trap[0])
-				setsignal(tp - trap);
-		}
-	}
-	trapcnt = 0;
-	INTON;
-}
-#endif
-
-/*
- * The trap builtin.
- */
-
-int
-trapcmd(int argc, char **argv)
-{
-	char *action;
-	char **ap;
-	int signo;
-
-	nextopt(nullstr);
-	ap = argptr;
-	if (!*ap) {
-		for (signo = 0 ; signo < NSIG ; signo++) {
-			if (trap[signo] != NULL) {
-				out1fmt(
-					"trap -- %s %s\n",
-					single_quote(trap[signo]),
-					signal_names[signo]
-				);
-			}
-		}
-		return 0;
-	}
-	if (!ap[1] || decode_signum(*ap) >= 0)
-		action = NULL;
-	else
-		action = *ap++;
-	while (*ap) {
-		if ((signo = decode_signal(*ap, 0)) < 0) {
-			outfmt(out2, "trap: %s: bad trap\n", *ap);
-			return 1;
-		}
-		INTOFF;
-		if (action) {
-			if (action[0] == '-' && action[1] == '\0')
-				action = NULL;
-			else {
-				if (*action)
-					trapcnt++;
-				action = savestr(action);
-			}
-		}
-		if (trap[signo]) {
-			if (*trap[signo])
-				trapcnt--;
-			ckfree(trap[signo]);
-		}
-		trap[signo] = action;
-		if (signo != 0)
-			setsignal(signo);
-		INTON;
-		ap++;
-	}
-	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;
-	int lvforked;
-	char *t, tsig;
-	struct sigaction act;
-
-	lvforked = vforked;
-
-	if ((t = trap[signo]) == NULL)
-		action = S_DFL;
-	else if (*t != '\0')
-		action = S_CATCH;
-	else
-		action = S_IGN;
-	if (rootshell && action == S_DFL && !lvforked) {
-		switch (signo) {
-		case SIGINT:
-			if (iflag || minusc || sflag == 0)
-				action = S_CATCH;
-			break;
-		case SIGQUIT:
-#ifdef DEBUG
-			if (debug)
-				break;
-#endif
-			/* FALLTHROUGH */
-		case SIGTERM:
-			if (iflag)
-				action = S_IGN;
-			break;
-#if JOBS
-		case SIGTSTP:
-		case SIGTTOU:
-			if (mflag)
-				action = S_IGN;
-			break;
-#endif
-		}
-	}
-
-	if (signo == SIGCHLD)
-		action = S_CATCH;
-
-	t = &sigmode[signo - 1];
-	tsig = *t;
-	if (tsig == 0) {
-		/*
-		 * current setting unknown
-		 */
-		if (sigaction(signo, 0, &act) == -1) {
-			/*
-			 * 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 (act.sa_handler == SIG_IGN) {
-			if (mflag && (signo == SIGTSTP ||
-			     signo == SIGTTIN || signo == SIGTTOU)) {
-				tsig = S_IGN;	/* don't hard ignore these */
-			} else
-				tsig = S_HARD_IGN;
-		} else {
-			tsig = S_RESET;	/* force to be set */
-		}
-	}
-	if (tsig == S_HARD_IGN || tsig == action)
-		return;
-	switch (action) {
-	case S_CATCH:
-		act.sa_handler = onsig;
-		break;
-	case S_IGN:
-		act.sa_handler = SIG_IGN;
-		break;
-	default:
-		act.sa_handler = SIG_DFL;
-	}
-	if (!lvforked)
-		*t = action;
-	act.sa_flags = 0;
-	sigfillset(&act.sa_mask);
-	sigaction(signo, &act, 0);
-}
-
-/*
- * Ignore a signal.
- */
-
-void
-ignoresig(int signo)
-{
-	if (sigmode[signo - 1] != S_IGN && sigmode[signo - 1] != S_HARD_IGN) {
-		signal(signo, SIG_IGN);
-	}
-	if (!vforked)
-		sigmode[signo - 1] = S_HARD_IGN;
-}
-
-
-
-/*
- * Signal handler.
- */
-
-void
-onsig(int signo)
-{
-	if (vforked)
-		return;
-
-	if (signo == SIGCHLD) {
-		gotsigchld = 1;
-		if (!trap[SIGCHLD])
-			return;
-	}
-
-	gotsig[signo - 1] = 1;
-	pending_sig = signo;
-
-	if (signo == SIGINT && !trap[SIGINT]) {
-		if (!suppressint)
-			onint();
-		intpending = 1;
-	}
-}
-
-
-
-/*
- * Called to execute a trap.  Perhaps we should avoid entering new trap
- * handlers while we are executing a trap handler.
- */
-
-void dotrap(void)
-{
-	char *p;
-	char *q;
-	int i;
-	int status, last_status;
-
-	if (!pending_sig)
-		return;
-
-	status = savestatus;
-	last_status = status;
-	if (likely(status < 0)) {
-		status = exitstatus;
-		savestatus = status;
-	}
-	pending_sig = 0;
-	barrier();
-
-	for (i = 0, q = gotsig; i < NSIG - 1; i++, q++) {
-		if (!*q)
-			continue;
-
-		if (evalskip) {
-			pending_sig = i + 1;
-			break;
-		}
-
-		*q = 0;
-
-		p = trap[i + 1];
-		if (!p)
-			continue;
-		evalstring(p, 0);
-		if (evalskip != SKIPFUNC)
-			exitstatus = status;
-	}
-
-	savestatus = last_status;
-}
-
-
-
-/*
- * Controls whether the shell is interactive or not.
- */
-
-
-void
-setinteractive(int on)
-{
-	static int is_interactive;
-
-	if (++on == is_interactive)
-		return;
-	is_interactive = on;
-	setsignal(SIGINT);
-	setsignal(SIGQUIT);
-	setsignal(SIGTERM);
-}
-
-
-
-/*
- * Called to exit the shell.
- */
-
-void
-exitshell(void)
-{
-	struct jmploc loc;
-	char *p;
-
-	savestatus = exitstatus;
-	TRACE(("pid %d, exitshell(%d)\n", getpid(), savestatus));
-	if (setjmp(loc.loc))
-		goto out;
-	handler = &loc;
-	if ((p = trap[0])) {
-		trap[0] = NULL;
-		evalskip = 0;
-		evalstring(p, 0);
-		evalskip = SKIPFUNCDEF;
-	}
-out:
-	exitreset();
-	/*
-	 * Disable job control so that whoever had the foreground before we
-	 * started can get it back.
-	 */
-	if (likely(!setjmp(loc.loc)))
-		setjobctl(0);
-	flushall();
-	_exit(exitstatus);
-	/* NOTREACHED */
-}
-
-static int decode_signum(const char *string)
-{
-	int signo = -1;
-
-	if (is_number(string)) {
-		signo = atoi(string);
-		if (signo >= NSIG)
-			signo = -1;
-	}
-
-	return signo;
-}
-
-int decode_signal(const char *string, int minsig)
-{
-	int signo;
-
-	signo = decode_signum(string);
-	if (signo >= 0)
-		return signo;
-
-	for (signo = minsig; signo < NSIG; signo++) {
-		if (!strcasecmp(string, signal_names[signo])) {
-			return signo;
-		}
-	}
-
-	return -1;
-}
-
-void sigblockall(sigset_t *oldmask)
-{
-	sigset_t mask;
-
-	sigfillset(&mask);
-	sigprocmask(SIG_SETMASK, &mask, oldmask);
-}