usr/src/lib/libbc/libc/gen/common/_perror.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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 #pragma ident   "%Z%%M% %I%     %E% SMI"
  23           /* from UCB 4.2 83/06/30 */
  24 /*
  25  * Print the error indicated
  26  * in the cerror cell.
  27  */
  28 #include <sys/types.h>
  29 #include <sys/uio.h>
  30
  31 extern  int errno;
  32 extern  int sys_nerr;
  33 extern  char *sys_errlist[];
  34 extern  int strlen();
  35 extern  int writev();
  36
  37 void
  38 _perror(s)
  39         char *s;
  40 {
  41         struct iovec iov[4];
  42         register struct iovec *v = iov;
  43
  44         if (s && *s) {
  45                 v->iov_base = s;
  46                 v->iov_len = strlen(s);
  47                 v++;
  48                 v->iov_base = ": ";
  49                 v->iov_len = 2;
  50                 v++;
  51         }
  52         v->iov_base =
  53             (unsigned)errno < sys_nerr ? sys_errlist[errno] : "Unknown error";
  54         v->iov_len = strlen(v->iov_base);
  55         v++;
  56         v->iov_base = "\n";
  57         v->iov_len = 1;
  58         writev(2, iov, (v - iov) + 1);
  59 }