lib/libwrap/percent_m.c

/*
 * Copyright 2001 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
#pragma ident   "%Z%%M% %I% %E% SMI"

 /*
  * Replace %m by system error message.
  *
  * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
  */

#ifndef lint
static char sccsid[] = "@(#) percent_m.c 1.1 94/12/28 17:42:37";
#endif

#include <stdio.h>
#include <errno.h>
#include <string.h>

extern int errno;
#ifndef SYS_ERRLIST_DEFINED
extern char *sys_errlist[];
extern int sys_nerr;
#endif

#include "mystdarg.h"

char   *percent_m(obuf, ibuf)
char   *obuf;
char   *ibuf;
{
    char   *bp = obuf;
    char   *cp = ibuf;

    while (*bp = *cp)
    if (*cp == '%' && cp[1] == 'm') {
        if (errno < sys_nerr && errno > 0) {
        strcpy(bp, sys_errlist[errno]);
        } else {
        sprintf(bp, "Unknown error %d", errno);
        }
        bp += strlen(bp);
        cp += 2;
    } else {
        bp++, cp++;
    }
    return (obuf);
}