aa9caaf657
merge of parallel duplicate work by Steve Price and myself. :-] There are some changes to the build that are my fault... mkinit.c was trying (poorly) to duplicate some of the work that make(1) is designed to do. The Makefile hackery is my fault too, the depend list was incomplete because of some explicit OBJS+= entries, so mkdep wasn't picking up their source file #includes. This closes a pile of /bin/sh PR's, but not all of them.. Submitted by: Steve Price <steve@bonsai.hiwaay.net>, peter
259 lines
6.3 KiB
C
259 lines
6.3 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: error.c,v 1.3 1995/05/30 00:07:10 rgrimes Exp $
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*/
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#ifndef lint
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static char sccsid[] = "@(#)error.c 8.2 (Berkeley) 5/4/95";
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#endif /* not lint */
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/*
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* Errors and exceptions.
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*/
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#include "shell.h"
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#include "main.h"
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#include "options.h"
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#include "output.h"
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#include "error.h"
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#include "show.h"
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#include <signal.h>
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#include <unistd.h>
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#include <errno.h>
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/*
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* Code to handle exceptions in C.
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*/
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struct jmploc *handler;
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int exception;
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volatile int suppressint;
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volatile int intpending;
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char *commandname;
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/*
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* Called to raise an exception. Since C doesn't include exceptions, we
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* just do a longjmp to the exception handler. The type of exception is
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* stored in the global variable "exception".
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*/
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void
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exraise(e)
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int e;
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{
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if (handler == NULL)
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abort();
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exception = e;
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longjmp(handler->loc, 1);
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}
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/*
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* Called from trap.c when a SIGINT is received. (If the user specifies
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* that SIGINT is to be trapped or ignored using the trap builtin, then
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* this routine is not called.) Suppressint is nonzero when interrupts
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* are held using the INTOFF macro. The call to _exit is necessary because
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* there is a short period after a fork before the signal handlers are
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* set to the appropriate value for the child. (The test for iflag is
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* just defensive programming.)
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*/
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void
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onint() {
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sigset_t sigset;
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if (suppressint) {
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intpending++;
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return;
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}
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intpending = 0;
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sigemptyset(&sigset);
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sigprocmask(SIG_SETMASK, &sigset, NULL);
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if (rootshell && iflag)
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exraise(EXINT);
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else
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_exit(128 + SIGINT);
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}
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void
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error2(a, b)
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char *a, *b;
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{
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error("%s: %s", a, b);
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}
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/*
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* Error is called to raise the error exception. If the first argument
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* is not NULL then error prints an error message using printf style
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* formatting. It then raises the error exception.
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*/
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#if __STDC__
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void
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error(char *msg, ...)
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#else
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void
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error(va_alist)
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va_dcl
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#endif
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{
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#if !__STDC__
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char *msg;
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#endif
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va_list ap;
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CLEAR_PENDING_INT;
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INTOFF;
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#if __STDC__
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va_start(ap, msg);
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#else
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va_start(ap);
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msg = va_arg(ap, char *);
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#endif
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#ifdef DEBUG
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if (msg)
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TRACE(("error(\"%s\") pid=%d\n", msg, getpid()));
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else
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TRACE(("error(NULL) pid=%d\n", getpid()));
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#endif
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if (msg) {
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if (commandname)
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outfmt(&errout, "%s: ", commandname);
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doformat(&errout, msg, ap);
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out2c('\n');
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}
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va_end(ap);
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flushall();
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exraise(EXERROR);
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}
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/*
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* Table of error messages.
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*/
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struct errname {
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short errcode; /* error number */
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short action; /* operation which encountered the error */
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char *msg; /* text describing the error */
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};
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#define ALL (E_OPEN|E_CREAT|E_EXEC)
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STATIC const struct errname errormsg[] = {
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{ EINTR, ALL, "interrupted" },
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{ EACCES, ALL, "permission denied" },
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{ EIO, ALL, "I/O error" },
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{ ENOENT, E_OPEN, "no such file" },
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{ ENOENT, E_CREAT,"directory nonexistent" },
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{ ENOENT, E_EXEC, "not found" },
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{ ENOTDIR, E_OPEN, "no such file" },
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{ ENOTDIR, E_CREAT,"directory nonexistent" },
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{ ENOTDIR, E_EXEC, "not found" },
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{ EISDIR, ALL, "is a directory" },
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#ifdef notdef
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{ EMFILE, ALL, "too many open files" },
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#endif
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{ ENFILE, ALL, "file table overflow" },
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{ ENOSPC, ALL, "file system full" },
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#ifdef EDQUOT
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{ EDQUOT, ALL, "disk quota exceeded" },
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#endif
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#ifdef ENOSR
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{ ENOSR, ALL, "no streams resources" },
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#endif
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{ ENXIO, ALL, "no such device or address" },
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{ EROFS, ALL, "read-only file system" },
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{ ETXTBSY, ALL, "text busy" },
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#ifdef SYSV
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{ EAGAIN, E_EXEC, "not enough memory" },
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#endif
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{ ENOMEM, ALL, "not enough memory" },
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#ifdef ENOLINK
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{ ENOLINK, ALL, "remote access failed" },
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#endif
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#ifdef EMULTIHOP
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{ EMULTIHOP, ALL, "remote access failed" },
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#endif
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#ifdef ECOMM
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{ ECOMM, ALL, "remote access failed" },
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#endif
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#ifdef ESTALE
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{ ESTALE, ALL, "remote access failed" },
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#endif
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#ifdef ETIMEDOUT
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{ ETIMEDOUT, ALL, "remote access failed" },
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#endif
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#ifdef ELOOP
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{ ELOOP, ALL, "symbolic link loop" },
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#endif
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{ E2BIG, E_EXEC, "argument list too long" },
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#ifdef ELIBACC
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{ ELIBACC, E_EXEC, "shared library missing" },
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#endif
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{ 0, 0, NULL },
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};
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/*
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* Return a string describing an error. The returned string may be a
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* pointer to a static buffer that will be overwritten on the next call.
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* Action describes the operation that got the error.
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*/
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char *
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errmsg(e, action)
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int e;
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int action;
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{
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struct errname const *ep;
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static char buf[12];
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for (ep = errormsg ; ep->errcode ; ep++) {
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if (ep->errcode == e && (ep->action & action) != 0)
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return ep->msg;
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}
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fmtstr(buf, sizeof buf, "error %d", e);
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return buf;
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}
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