Date: Fri, 22 Mar 2002 19:50:07 -0800 (PST) From: "Tim J. Robbins" <tim@robbins.dropbear.id.au> To: freebsd-standards@FreeBSD.org Subject: Re: standards/36191: P1003.1-2001 csplit utility Message-ID: <200203230350.g2N3o7933719@freefall.freebsd.org>
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The following reply was made to PR standards/36191; it has been noted by GNATS.
From: "Tim J. Robbins" <tim@robbins.dropbear.id.au>
To: "Brian F. Feldman" <green@FreeBSD.org>
Cc: freebsd-gnats-submit@FreeBSD.org
Subject: Re: standards/36191: P1003.1-2001 csplit utility
Date: Sat, 23 Mar 2002 14:41:04 +1100
On Fri, Mar 22, 2002 at 09:49:36AM -0500, Brian F. Feldman wrote:
> "Tim J. Robbins" <tim@robbins.dropbear.id.au> wrote:
> > X sprintf(fmt, "%%s%%0%ldld", sufflen);
> > X sprintf(currfile, fmt, prefix, nfiles);
>
> This is a bit of a strange construct. You should probably be using
> something like:
> snprintf(currfile, sizeof(currfile), "%s%*ld", prefix, sufflen, nfiles);
Thanks for your suggestion - that way is indeed much cleaner.
--- csplit.c 2002/03/22 07:39:55 1.17
+++ csplit.c 2002/03/23 03:36:26 1.18
@@ -44,7 +44,7 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
-__RCSID("$Id: csplit.c,v 1.17 2002/03/22 07:39:55 tim Exp $");
+__RCSID("$Id: csplit.c,v 1.18 2002/03/23 03:36:26 tim Exp $");
#include <sys/types.h>
@@ -91,11 +91,10 @@
FILE *
newfile(void)
{
- char fmt[20];
FILE *fp;
- sprintf(fmt, "%%s%%0%ldld", sufflen);
- sprintf(currfile, fmt, prefix, nfiles);
+ snprintf(currfile, sizeof(currfile), "%s%0*ld", prefix, sufflen,
+ nfiles);
if ((fp = fopen(currfile, "w+")) == NULL)
err(1, "%s", currfile);
nfiles++;
@@ -107,15 +106,14 @@
void
cleanup(void)
{
- char fmt[20], fnbuf[PATH_MAX];
+ char fnbuf[PATH_MAX];
long i;
if (!doclean)
return;
for (i = 0; i < nfiles; i++) {
- sprintf(fmt, "%%s%%0%ldld", sufflen);
- sprintf(fnbuf, fmt, prefix, i);
+ snprintf(fnbuf, sizeof(fnbuf), "%s%0*ld", prefix, sufflen, i);
unlink(fnbuf);
}
}
Tim
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