svn commit: r188214 - head/usr.sbin/config
Wojciech A. Koszek
wkoszek at FreeBSD.org
Thu Feb 5 16:50:22 PST 2009
Author: wkoszek
Date: Fri Feb 6 00:50:21 2009
New Revision: 188214
URL: http://svn.freebsd.org/changeset/base/188214
Log:
Make config -x <kernel> only return non-zero characters,
so that:
config -x <kernel> | grep <something>
just works.
Reported by: Danny Braniss <danny at cs.huji.ac.il>
Modified:
head/usr.sbin/config/main.c
Modified: head/usr.sbin/config/main.c
==============================================================================
--- head/usr.sbin/config/main.c Fri Feb 6 00:48:56 2009 (r188213)
+++ head/usr.sbin/config/main.c Fri Feb 6 00:50:21 2009 (r188214)
@@ -669,7 +669,7 @@ kernconfdump(const char *file)
struct stat st;
FILE *fp, *pp;
int error, len, osz, r;
- unsigned int off, size;
+ unsigned int i, off, size;
char *cmd, *o;
r = open(file, O_RDONLY);
@@ -707,7 +707,18 @@ kernconfdump(const char *file)
r = fseek(fp, off, SEEK_CUR);
if (r != 0)
errx(EXIT_FAILURE, "fseek() failed");
- while ((r = fgetc(fp)) != EOF && size-- > 0)
+ for (i = 0; i < size - 1; i++) {
+ r = fgetc(fp);
+ if (r == EOF)
+ break;
+ /*
+ * If '\0' is present in the middle of the configuration
+ * string, this means something very weird is happening.
+ * Make such case very visible.
+ */
+ assert(r != '\0' && ("Char present in the configuration "
+ "string mustn't be equal to 0"));
fputc(r, stdout);
+ }
fclose(fp);
}
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