ubase

commit 41769b976a17a5704cfc0ae27d1ec72c54fbf52e
parent 9c37575961239dc7d0d203fff341c0c7677950ba
Author: sin <sin@2f30.org>
Date:   Tue, 29 Oct 2013 15:54:12 +0000

Check for a valid pagesize in mkswap(8)

Diffstat:
M
mkswap.c
 | 
7
++++++-

1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/mkswap.c b/mkswap.c
@@ -45,7 +45,12 @@ main(int argc, char *argv[])
 	if (argc < 1)
 		usage();
 
-	pagesize = sysconf(_SC_PAGE_SIZE);
+	pagesize = sysconf(_SC_PAGESIZE);
+	if (pagesize <= 0) {
+		pagesize = sysconf(_SC_PAGE_SIZE);
+		if (pagesize <= 0)
+			enprintf(EXIT_FAILURE, "can't determine pagesize\n");
+	}
 
 	fd = open(argv[0], O_RDWR);
 	if (fd < 0)