make this function return 1 is its an ISO, 0 otherwise

1 files changed, 6 insertions, 5 deletions

diff --git a/isys/isofs.c b/isys/isofs.c
index 5ba255ff9..1f954a225 100644
--- a/isys/isofs.c
+++ b/isys/isofs.c
@@ -4,6 +4,7 @@
 
 #define BLOCK_SIZE 2048
  
+/* returns 1 if file is an ISO, 0 otherwise */
 int fileIsIso(const char * file) {
     int blkNum;
     char magic[5];
@@ -11,25 +12,25 @@ int fileIsIso(const char * file) {
 
     fd = open(file, O_RDONLY);
     if (fd < 0)
-	return 1;
+	return 0;
 
     for (blkNum = 16; blkNum < 100; blkNum++) {
 	if (lseek(fd, blkNum * BLOCK_SIZE + 1, SEEK_SET) < 0) {
 	    close(fd);
-	    return 1;
+	    return 0;
 	}
 
 	if (read(fd, magic, sizeof(magic)) != sizeof(magic)) {
 	    close(fd);
-	    return 1;
+	    return 0;
 	}
 
 	if (!strncmp(magic, "CD001", 5)) {
 	    close(fd);
-	    return 0;
+	    return 1;
 	}
     }
 
     close(fd); 
-    return 1;
+    return 0;
 }