usr/src/cmd/eeprom/common/error.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #include <stdio.h>
  27 #include <stdarg.h>
  28 #include <errno.h>
  29
  30 #define NO_PERROR       0
  31 #define PERROR          1
  32
  33 char *progname;
  34
  35 void
  36 setpname(char *name)
  37 {
  38         register char *p = name, c;
  39
  40         if (p)
  41                 while (c = *p++)
  42                         if (c == '/')
  43                                 name = p;
  44
  45         progname = name;
  46 }
  47
  48 /* _error([no_perror, ] fmt [, arg ...]) */
  49 /*VARARGS*/
  50 int
  51 _error(int do_perror, char *fmt, ...)
  52 {
  53         int saved_errno;
  54         va_list ap;
  55
  56         saved_errno = errno;
  57
  58         /*
  59          * flush all buffers
  60          */
  61         (void) fflush(NULL);
  62         if (progname)
  63                 (void) fprintf(stderr, "%s: ", progname);
  64
  65         va_start(ap, fmt);
  66         (void) vfprintf(stderr, fmt, ap);
  67         va_end(ap);
  68
  69         if (do_perror == NO_PERROR)
  70                 (void) fprintf(stderr, "\n");
  71         else {
  72                 (void) fprintf(stderr, ": ");
  73                 errno = saved_errno;
  74                 perror("");
  75         }
  76
  77         return (1);
  78 }