From bb69bf6964aed63092600b94e33d818d718b9b0d Mon Sep 17 00:00:00 2001
From: Jan Vales <e0726236@jupiter.par.tuwien.ac.at>
Date: Mon, 30 Jan 2012 11:34:41 +0100
Subject: [PATCH] getopt fix: will now fail when reading more than $file.size
from $file.
---
prefix/prefix.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/prefix/prefix.c b/prefix/prefix.c
index 57304b9..77c7f93 100644
--- a/prefix/prefix.c
+++ b/prefix/prefix.c
@@ -71,9 +71,13 @@ int main (int argc, char* argv[]) {
struct stat st;
stat(filename, &st);
size = st.st_size;
- if (n <= 0 || n > size){
+ if (n == 0){
n = size;
}
+ if (n < 0 || n > size){
+ fprintf (stderr, "Cannot read %li numbers from \"%s\" - only has %li bytes.\n",n,filename,st.st_size);
+ usage();
+ }
}else{
fprintf (stderr, "File %s does not exist.\n", filename);
usage();
--
2.43.0