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/* $OpenBSD: percent_m.c,v 1.5 2013/11/13 22:37:15 deraadt Exp $ */
/*
* Replace %m by system error message.
*
* Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
*/
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include "tcpd.h"
#ifndef SYS_ERRLIST_DEFINED
extern char *sys_errlist[];
extern int sys_nerr;
#endif
char *
percent_m(char*obuf, char*ibuf)
{
char *bp = obuf;
char *cp = ibuf;
int len = BUFSIZ;
while ((*bp = *cp)) {
if (*cp == '%' && cp[1] == 'm') {
len = BUFSIZ - (bp - obuf);
if (errno < sys_nerr && errno > 0) {
strlcpy(bp, sys_errlist[errno], len);
} else {
snprintf(bp, len, "Unknown error %d", errno);
}
bp += strlen(bp);
cp += 2;
} else {
bp++, cp++;
}
}
return (obuf);
}
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