/*- * Copyright (c) 1991 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 static char sccsid[] = "@(#)error.c 5.1 (Berkeley) 3/7/91"; #endif /* not lint */ /* * Errors and exceptions. */ #include "shell.h" #include "main.h" #include "options.h" #include "output.h" #include "error.h" #include #ifdef __STDC__ #include "stdarg.h" #else #include #endif #include /* * Code to handle exceptions in C. */ struct jmploc *handler; int exception; volatile int suppressint; volatile int intpending; char *commandname; /* * 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) { 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. The call to _exit is necessary because * there is a short period after a fork before the signal handlers are * set to the appropriate value for the child. (The test for iflag is * just defensive programming.) */ void onint() { if (suppressint) { intpending++; return; } intpending = 0; #ifdef BSD sigsetmask(0); #endif if (rootshell && iflag) exraise(EXINT); else _exit(128 + SIGINT); } void error2(a, b) char *a, *b; { error("%s: %s", a, b); } /* * Error 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. */ #ifdef __STDC__ void error(char *msg, ...) { #else void error(va_alist) va_dcl { char *msg; #endif va_list ap; CLEAR_PENDING_INT; INTOFF; #ifdef __STDC__ va_start(ap, msg); #else va_start(ap); msg = va_arg(ap, char *); #endif #ifdef DEBUG if (msg) TRACE(("error(\"%s\") pid=%d\n", msg, getpid())); else TRACE(("error(NULL) pid=%d\n", getpid())); #endif if (msg) { if (commandname) outfmt(&errout, "%s: ", commandname); doformat(&errout, msg, ap); out2c('\n'); } va_end(ap); flushall(); exraise(EXERROR); } /* * 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", /* EMFILE, ALL, "too many open files", */ 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) { 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; }