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📁 ..
📄 Makefile(1.76 KB)
📄 Makefile.depend(312 B)
📄 TOUR(14.11 KB)
📄 alias.c(5.35 KB)
📄 alias.h(1.83 KB)
📄 arith.h(1.72 KB)
📄 arith_yacc.c(8.38 KB)
📄 arith_yacc.h(2.86 KB)
📄 arith_yylex.c(5.5 KB)
📁 bltin
📄 builtins.def(3.09 KB)
📄 cd.c(8.94 KB)
📄 cd.h(1.59 KB)
📄 dot.profile(507 B)
📄 dot.shrc(865 B)
📄 error.c(5.08 KB)
📄 error.h(3.69 KB)
📄 eval.c(30.24 KB)
📄 eval.h(2.84 KB)
📄 exec.c(17.56 KB)
📄 exec.h(2.8 KB)
📄 expand.c(33.14 KB)
📄 expand.h(2.47 KB)
📁 funcs
📄 histedit.c(10.93 KB)
📄 input.c(11.52 KB)
📄 input.h(2.59 KB)
📄 jobs.c(32.46 KB)
📄 jobs.h(2.55 KB)
📄 mail.c(3.36 KB)
📄 mail.h(1.76 KB)
📄 main.c(7.29 KB)
📄 main.h(1.95 KB)
📄 memalloc.c(7.68 KB)
📄 memalloc.h(3.33 KB)
📄 miscbltin.c(12.62 KB)
📄 mkbuiltins(3.38 KB)
📄 mknodes.c(11.14 KB)
📄 mksyntax.c(8.83 KB)
📄 mktokens(2.79 KB)
📄 myhistedit.h(1.82 KB)
📄 mystring.c(2.74 KB)
📄 mystring.h(1.86 KB)
📄 nodes.c.pat(4.35 KB)
📄 nodetypes(5.1 KB)
📄 options.c(12.97 KB)
📄 options.h(3.63 KB)
📄 output.c(7.24 KB)
📄 output.h(3.24 KB)
📄 parser.c(46.37 KB)
📄 parser.h(3.43 KB)
📄 profile(427 B)
📄 redir.c(8.71 KB)
📄 redir.h(2.02 KB)
📄 sh.1(72.73 KB)
📄 shell.h(2.61 KB)
📄 show.c(8.08 KB)
📄 show.h(1.84 KB)
📁 tests
📄 trap.c(11.32 KB)
📄 trap.h(2.09 KB)
📄 var.c(19.03 KB)
📄 var.h(4.4 KB)

Editing: error.c

/*-
 * 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[] = "@(#)error.c	8.2 (Berkeley) 5/4/95";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * Errors and exceptions.
 */

#include "shell.h"
#include "eval.h"
#include "main.h"
#include "options.h"
#include "output.h"
#include "error.h"
#include "nodes.h" /* show.h needs nodes.h */
#include "show.h"
#include "trap.h"
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>

/*
 * Code to handle exceptions in C.
 */

struct jmploc *handler;
volatile sig_atomic_t exception;
volatile sig_atomic_t suppressint;
volatile sig_atomic_t intpending;

static void verrorwithstatus(int, const char *, va_list) __printf0like(2, 0) __dead2;

/*
 * Called to raise an exception.  Since C doesn't include exceptions, we
 * just do a longjmp to the exception handler.  The type of exception is
 * stored in the global variable "exception".
 *
 * Interrupts are disabled; they should be reenabled when the exception is
 * caught.
 */

void
exraise(int e)
{
	INTOFF;
	if (handler == NULL)
		abort();
	exception = e;
	longjmp(handler->loc, 1);
}

/*
 * Called from trap.c when a SIGINT is received and not suppressed, or when
 * an interrupt is pending and interrupts are re-enabled using INTON.
 * (If the user specifies that SIGINT is to be trapped or ignored using the
 * trap builtin, then this routine is not called.)  Suppressint is nonzero
 * when interrupts are held using the INTOFF macro.  If SIGINTs are not
 * suppressed and the shell is not a root shell, then we want to be
 * terminated if we get here, as if we were terminated directly by a SIGINT.
 * Arrange for this here.
 */

void
onint(void)
{
	sigset_t sigs;

intpending = 0;
	sigemptyset(&sigs);
	sigprocmask(SIG_SETMASK, &sigs, NULL);

/*
	 * This doesn't seem to be needed, since main() emits a newline.
	 */
#if 0
	if (tcgetpgrp(0) == getpid())
		write(STDERR_FILENO, "\n", 1);
#endif
	if (rootshell && iflag)
		exraise(EXINT);
	else {
		signal(SIGINT, SIG_DFL);
		kill(getpid(), SIGINT);
		_exit(128 + SIGINT);
	}
}

static void
vwarning(const char *msg, va_list ap)
{
	if (commandname)
		outfmt(out2, "%s: ", commandname);
	else if (arg0)
		outfmt(out2, "%s: ", arg0);
	doformat(out2, msg, ap);
	out2fmt_flush("\n");
}

void
warning(const char *msg, ...)
{
	va_list ap;
	va_start(ap, msg);
	vwarning(msg, ap);
	va_end(ap);
}

/*
 * Exverror is called to raise the error exception.  If the first argument
 * is not NULL then error prints an error message using printf style
 * formatting.  It then raises the error exception.
 */
static void
verrorwithstatus(int status, const char *msg, va_list ap)
{
	/*
	 * An interrupt trumps an error.  Certain places catch error
	 * exceptions or transform them to a plain nonzero exit code
	 * in child processes, and if an error exception can be handled,
	 * an interrupt can be handled as well.
	 *
	 * exraise() will disable interrupts for the exception handler.
	 */
	FORCEINTON;

#ifdef DEBUG
	if (msg)
		TRACE(("verrorwithstatus(%d, \"%s\") pid=%d\n",
		    status, msg, getpid()));
	else
		TRACE(("verrorwithstatus(%d, NULL) pid=%d\n",
		    status, getpid()));
#endif
	if (msg)
		vwarning(msg, ap);
	flushall();
	exitstatus = status;
	exraise(EXERROR);
}

void
error(const char *msg, ...)
{
	va_list ap;
	va_start(ap, msg);
	verrorwithstatus(2, msg, ap);
	va_end(ap);
}

void
errorwithstatus(int status, const char *msg, ...)
{
	va_list ap;
	va_start(ap, msg);
	verrorwithstatus(status, msg, ap);
	va_end(ap);
}

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Editing: error.c

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