usr/src/lib/libwrap/percent_m.c

   1 /*
   2  * Copyright 2001 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5 #pragma ident   "%Z%%M% %I%     %E% SMI"
   6
   7  /*
   8   * Replace %m by system error message.
   9   *
  10   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
  11   */
  12
  13 #ifndef lint
  14 static char sccsid[] = "@(#) percent_m.c 1.1 94/12/28 17:42:37";
  15 #endif
  16
  17 #include <stdio.h>
  18 #include <errno.h>
  19 #include <string.h>
  20
  21 extern int errno;
  22 #ifndef SYS_ERRLIST_DEFINED
  23 extern char *sys_errlist[];
  24 extern int sys_nerr;
  25 #endif
  26
  27 #include "mystdarg.h"
  28
  29 char   *percent_m(obuf, ibuf)
  30 char   *obuf;
  31 char   *ibuf;
  32 {
  33     char   *bp = obuf;
  34     char   *cp = ibuf;
  35
  36     while (*bp = *cp)
  37         if (*cp == '%' && cp[1] == 'm') {
  38             if (errno < sys_nerr && errno > 0) {
  39                 strcpy(bp, sys_errlist[errno]);
  40             } else {
  41                 sprintf(bp, "Unknown error %d", errno);
  42             }
  43             bp += strlen(bp);
  44             cp += 2;
  45         } else {
  46             bp++, cp++;
  47         }
  48     return (obuf);
  49 }