/* $OpenBSD: percent_m.c,v 1.4 2009/10/27 23:59:30 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> #ifndef SYS_ERRLIST_DEFINED extern char *sys_errlist[]; extern int sys_nerr; #endif char *percent_m(obuf, ibuf) 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); }