306 lines
7.1 KiB
C
306 lines
7.1 KiB
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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 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
|
|
#if 0
|
|
static char sccsid[] = "@(#)error.c 8.2 (Berkeley) 5/4/95";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* Errors and exceptions.
|
|
*/
|
|
|
|
#include "shell.h"
|
|
#include "main.h"
|
|
#include "options.h"
|
|
#include "output.h"
|
|
#include "error.h"
|
|
#include "show.h"
|
|
#include "trap.h"
|
|
#include <signal.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;
|
|
char *commandname;
|
|
|
|
|
|
static void exverror __P((int, char *, va_list));
|
|
|
|
/*
|
|
* 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".
|
|
*/
|
|
|
|
void
|
|
exraise(e)
|
|
int e;
|
|
{
|
|
if (handler == NULL)
|
|
abort();
|
|
exception = e;
|
|
longjmp(handler->loc, 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Called from trap.c when a SIGINT is received. (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() {
|
|
sigset_t sigset;
|
|
|
|
/*
|
|
* 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) {
|
|
intpending++;
|
|
return;
|
|
}
|
|
intpending = 0;
|
|
sigemptyset(&sigset);
|
|
sigprocmask(SIG_SETMASK, &sigset, 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);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 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
|
|
exverror(cond, msg, ap)
|
|
int cond;
|
|
char *msg;
|
|
va_list ap;
|
|
{
|
|
CLEAR_PENDING_INT;
|
|
INTOFF;
|
|
|
|
#ifdef DEBUG
|
|
if (msg)
|
|
TRACE(("exverror(%d, \"%s\") pid=%d\n", cond, msg, getpid()));
|
|
else
|
|
TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid()));
|
|
#endif
|
|
if (msg) {
|
|
if (commandname)
|
|
outfmt(&errout, "%s: ", commandname);
|
|
doformat(&errout, msg, ap);
|
|
out2c('\n');
|
|
}
|
|
flushall();
|
|
exraise(cond);
|
|
}
|
|
|
|
|
|
#ifdef __STDC__
|
|
void
|
|
error(char *msg, ...)
|
|
#else
|
|
void
|
|
error(va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
#ifndef __STDC__
|
|
char *msg;
|
|
#endif
|
|
va_list ap;
|
|
#ifdef __STDC__
|
|
va_start(ap, msg);
|
|
#else
|
|
va_start(ap);
|
|
msg = va_arg(ap, char *);
|
|
#endif
|
|
exverror(EXERROR, msg, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
|
|
#ifdef __STDC__
|
|
void
|
|
exerror(int cond, char *msg, ...)
|
|
#else
|
|
void
|
|
exerror(va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
#ifndef __STDC__
|
|
int cond;
|
|
char *msg;
|
|
#endif
|
|
va_list ap;
|
|
#ifdef __STDC__
|
|
va_start(ap, msg);
|
|
#else
|
|
va_start(ap);
|
|
cond = va_arg(ap, int);
|
|
msg = va_arg(ap, char *);
|
|
#endif
|
|
exverror(cond, msg, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Table of error messages.
|
|
*/
|
|
|
|
struct errname {
|
|
short errcode; /* error number */
|
|
short action; /* operation which encountered the error */
|
|
char *msg; /* text describing the error */
|
|
};
|
|
|
|
|
|
#define ALL (E_OPEN|E_CREAT|E_EXEC)
|
|
|
|
STATIC const struct errname errormsg[] = {
|
|
{ EINTR, ALL, "interrupted" },
|
|
{ EACCES, ALL, "permission denied" },
|
|
{ EIO, ALL, "I/O error" },
|
|
{ ENOENT, E_OPEN, "no such file" },
|
|
{ ENOENT, E_CREAT,"directory nonexistent" },
|
|
{ ENOENT, E_EXEC, "not found" },
|
|
{ ENOTDIR, E_OPEN, "no such file" },
|
|
{ ENOTDIR, E_CREAT,"directory nonexistent" },
|
|
{ ENOTDIR, E_EXEC, "not found" },
|
|
{ EISDIR, ALL, "is a directory" },
|
|
#ifdef notdef
|
|
{ EMFILE, ALL, "too many open files" },
|
|
#endif
|
|
{ ENFILE, ALL, "file table overflow" },
|
|
{ ENOSPC, ALL, "file system full" },
|
|
#ifdef EDQUOT
|
|
{ EDQUOT, ALL, "disk quota exceeded" },
|
|
#endif
|
|
#ifdef ENOSR
|
|
{ ENOSR, ALL, "no streams resources" },
|
|
#endif
|
|
{ ENXIO, ALL, "no such device or address" },
|
|
{ EROFS, ALL, "read-only file system" },
|
|
{ ETXTBSY, ALL, "text busy" },
|
|
#ifdef SYSV
|
|
{ EAGAIN, E_EXEC, "not enough memory" },
|
|
#endif
|
|
{ ENOMEM, ALL, "not enough memory" },
|
|
#ifdef ENOLINK
|
|
{ ENOLINK, ALL, "remote access failed" },
|
|
#endif
|
|
#ifdef EMULTIHOP
|
|
{ EMULTIHOP, ALL, "remote access failed" },
|
|
#endif
|
|
#ifdef ECOMM
|
|
{ ECOMM, ALL, "remote access failed" },
|
|
#endif
|
|
#ifdef ESTALE
|
|
{ ESTALE, ALL, "remote access failed" },
|
|
#endif
|
|
#ifdef ETIMEDOUT
|
|
{ ETIMEDOUT, ALL, "remote access failed" },
|
|
#endif
|
|
#ifdef ELOOP
|
|
{ ELOOP, ALL, "symbolic link loop" },
|
|
#endif
|
|
{ E2BIG, E_EXEC, "argument list too long" },
|
|
#ifdef ELIBACC
|
|
{ ELIBACC, E_EXEC, "shared library missing" },
|
|
#endif
|
|
{ 0, 0, NULL },
|
|
};
|
|
|
|
|
|
/*
|
|
* Return a string describing an error. The returned string may be a
|
|
* pointer to a static buffer that will be overwritten on the next call.
|
|
* Action describes the operation that got the error.
|
|
*/
|
|
|
|
char *
|
|
errmsg(e, action)
|
|
int e;
|
|
int action;
|
|
{
|
|
struct errname const *ep;
|
|
static char buf[12];
|
|
|
|
for (ep = errormsg ; ep->errcode ; ep++) {
|
|
if (ep->errcode == e && (ep->action & action) != 0)
|
|
return ep->msg;
|
|
}
|
|
fmtstr(buf, sizeof buf, "error %d", e);
|
|
return buf;
|
|
}
|