comerr.c
上传用户:xiejiait
上传日期:2007-01-06
资源大小:881k
文件大小:4k
- /* @(#)comerr.c 1.21 99/12/24 Copyright 1985 J. Schilling */
- /*
- * Routines for printing command errors
- *
- * Copyright (c) 1985 J. Schilling
- */
- /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <mconfig.h>
- #include <stdio.h>
- #include <standard.h>
- #include <stdxlib.h>
- #include <vadefs.h>
- #include <strdefs.h>
- #ifndef HAVE_STRERROR
- extern char *sys_errlist[];
- extern int sys_nerr;
- #endif
- EXPORT int on_comerr __PR((void (*fun)(int, void *), void *arg));
- EXPORT void comerr __PR((const char *, ...));
- EXPORT void comerrno __PR((int, const char *, ...));
- EXPORT int errmsg __PR((const char *, ...));
- EXPORT int errmsgno __PR((int, const char *, ...));
- LOCAL int _comerr __PR((int, int, const char *, va_list));
- EXPORT void comexit __PR((int));
- EXPORT char *errmsgstr __PR((int));
- typedef struct ex {
- struct ex *next;
- void (*func) __PR((int, void *));
- void *arg;
- } ex_t;
- LOCAL ex_t *exfuncs;
- EXPORT int
- on_comerr(func, arg)
- void (*func) __PR((int, void *));
- void *arg;
- {
- ex_t *fp;
- fp = malloc(sizeof(*fp));
- if (fp == NULL)
- return (-1);
- fp->func = func;
- fp->arg = arg;
- fp->next = exfuncs;
- exfuncs = fp;
- return (0);
- }
- /* VARARGS1 */
- #ifdef PROTOTYPES
- void comerr(const char *msg, ...)
- #else
- void comerr(msg, va_alist)
- char *msg;
- va_dcl
- #endif
- {
- va_list args;
- #ifdef PROTOTYPES
- va_start(args, msg);
- #else
- va_start(args);
- #endif
- (void)_comerr(TRUE, geterrno(), msg, args);
- /* NOTREACHED */
- va_end(args);
- }
- /* VARARGS2 */
- #ifdef PROTOTYPES
- void comerrno(int err, const char *msg, ...)
- #else
- void comerrno(err, msg, va_alist)
- int err;
- char *msg;
- va_dcl
- #endif
- {
- va_list args;
- #ifdef PROTOTYPES
- va_start(args, msg);
- #else
- va_start(args);
- #endif
- (void)_comerr(TRUE, err, msg, args);
- /* NOTREACHED */
- va_end(args);
- }
- /* VARARGS1 */
- #ifdef PROTOTYPES
- int errmsg(const char *msg, ...)
- #else
- int errmsg(msg, va_alist)
- char *msg;
- va_dcl
- #endif
- {
- va_list args;
- int ret;
- #ifdef PROTOTYPES
- va_start(args, msg);
- #else
- va_start(args);
- #endif
- ret = _comerr(FALSE, geterrno(), msg, args);
- va_end(args);
- return (ret);
- }
- /* VARARGS2 */
- #ifdef PROTOTYPES
- int errmsgno(int err, const char *msg, ...)
- #else
- int errmsgno(err, msg, va_alist)
- int err;
- char *msg;
- va_dcl
- #endif
- {
- va_list args;
- int ret;
- #ifdef PROTOTYPES
- va_start(args, msg);
- #else
- va_start(args);
- #endif
- ret = _comerr(FALSE, err, msg, args);
- va_end(args);
- return (ret);
- }
- LOCAL int _comerr(exflg, err, msg, args)
- int exflg;
- int err;
- const char *msg;
- va_list args;
- {
- char errbuf[20];
- char *errnam;
- char *prognam = get_progname();
-
- if (err < 0) {
- error("%s: %r", prognam, msg, args);
- } else {
- errnam = errmsgstr(err);
- if (errnam == NULL) {
- (void)sprintf(errbuf, "Error %d", err);
- errnam = errbuf;
- }
- error("%s: %s. %r", prognam, errnam, msg, args);
- }
- if (exflg) {
- comexit(err);
- /* NOTREACHED */
- }
- return(err);
- }
- EXPORT void
- comexit(err)
- int err;
- {
- while (exfuncs) {
- (*exfuncs->func)(err, exfuncs->arg);
- exfuncs = exfuncs->next;
- }
- exit(err);
- /* NOTREACHED */
- }
- EXPORT char *
- errmsgstr(err)
- int err;
- {
- #ifdef HAVE_STRERROR
- return (strerror(err));
- #else
- if (err < 0 || err >= sys_nerr) {
- return (NULL);
- } else {
- return (sys_errlist[err]);
- }
- #endif
- }