usr/src/cmd/sendmail/libsm/strerror.c

   1 /*
   2  * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
   3  *      All rights reserved.
   4  * Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.
   5  * Copyright (c) 1988, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * By using this file, you agree to the terms and conditions set
   9  * forth in the LICENSE file which can be found at the top level of
  10  * the sendmail distribution.
  11  *
  12  */
  13
  14 #pragma ident   "%Z%%M% %I%     %E% SMI"
  15
  16 #include <sm/gen.h>
  17 SM_RCSID("@(#)$Id: strerror.c,v 1.21 2001/06/17 21:31:41 ca Exp $")
  18
  19 /*
  20 **  define strerror for platforms that lack it.
  21 */
  22
  23 #include <errno.h>
  24 #include <stdio.h>      /* sys_errlist, on some platforms */
  25
  26 #include <sm/io.h>      /* sm_snprintf */
  27 #include <sm/string.h>
  28 #include <sm/conf.h>
  29 #include <sm/errstring.h>
  30
  31 #if !defined(ERRLIST_PREDEFINED)
  32 extern char *sys_errlist[];
  33 extern int sys_nerr;
  34 #endif /* !defined(ERRLIST_PREDEFINED) */
  35
  36 #if !HASSTRERROR
  37
  38 /*
  39 **  STRERROR -- return error message string corresponding to an error number.
  40 **
  41 **      Parameters:
  42 **              err -- error number.
  43 **
  44 **      Returns:
  45 **              Error string (might be pointer to static buffer).
  46 */
  47
  48 char *
  49 strerror(err)
  50         int err;
  51 {
  52         static char buf[64];
  53
  54         if (err >= 0 && err < sys_nerr)
  55                 return (char *) sys_errlist[err];
  56         else
  57         {
  58                 (void) sm_snprintf(buf, sizeof(buf), "Error %d", err);
  59                 return buf;
  60         }
  61 }
  62 #endif /* !HASSTRERROR */