[syslinux:master] Fix nuisance _FORTIFY_SOURCE failures

[syslinux-bot for H. Peter Anvin]

Commit-ID:  65826b186226e3f729b9bd0220777913ef8a67ec
Gitweb:     http://syslinux.zytor.com/commit/65826b186226e3f729b9bd0220777913ef8a67ec
Author:     H. Peter Anvin <hpa at zytor.com>
AuthorDate: Fri, 2 Jul 2010 09:49:45 -0700
Committer:  H. Peter Anvin <hpa at zytor.com>
CommitDate: Fri, 2 Jul 2010 09:49:45 -0700

Fix nuisance _FORTIFY_SOURCE failures

Fix a couple of _FORTIFY_SOURCE failures which are nuisance warnings,
but fortunately not too hard to just plain avoid.

Signed-off-by: H. Peter Anvin <hpa at zytor.com>


---
 mtools/syslinux.c |    6 ++++--
 utils/isohybrid.c |    4 +++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/mtools/syslinux.c b/mtools/syslinux.c
index f5b89c9..97286c4 100644
--- a/mtools/syslinux.c
+++ b/mtools/syslinux.c
@@ -246,7 +246,8 @@ int main(int argc, char *argv[])
     syslinux_reset_adv(syslinux_adv);
 
     /* This command may fail legitimately */
-    system("mattrib -h -r -s s:/ldlinux.sys 2>/dev/null");
+    status = system("mattrib -h -r -s s:/ldlinux.sys 2>/dev/null");
+    (void)status;		/* Keep _FORTIFY_SOURCE happy */
 
     mtp = popen("mcopy -D o -D O -o - s:/ldlinux.sys", "w");
     if (!mtp ||
@@ -323,7 +324,8 @@ int main(int argc, char *argv[])
 
 	/* This command may fail legitimately */
 	sprintf(command, "mattrib -h -r -s %s 2>/dev/null", target_file);
-	system(command);
+	status = system(command);
+	(void)status;		/* Keep _FORTIFY_SOURCE happy */
 
 	sprintf(command, "mmove -D o -D O s:/ldlinux.sys %s", target_file);
 	status = system(command);
diff --git a/utils/isohybrid.c b/utils/isohybrid.c
index 38257f6..57c1015 100644
--- a/utils/isohybrid.c
+++ b/utils/isohybrid.c
@@ -514,7 +514,9 @@ main(int argc, char *argv[])
         if (fseek(fp, 440, SEEK_SET))
             err(1, "%s: seek error - 4", argv[0]);
 
-	fread(&id, 4, 1, fp);
+	if (fread(&id, 1, 4, fp) != 4)
+	    err(1, "%s: read error", argv[0]);
+
         id = lendian_int(id);
         if (!id)
         {