shithub: vdir

Download patch

ref: 2a931184d7e0d5a3cea1fa925619b51b69988464
parent: 8ffa802e29ca42eb54cc4b10f8c756ba6275e801
author: phil9 <[email protected]>
date: Tue Oct 11 05:22:04 EDT 2022

fix floating point exception (thanks igor)

The logarithm of a negative number is undefined. To store the
file length the int data type is not sufficient as the file
length is represented by a vlong (see /sys/include/libc.h:657).

Overflowing an integer causes it to be interpreted as a negative
number, that in turn causes an exception when trying to compute
the log of a negative number.

To fix the issue the type of the variable storing the largest
file length needs to change from int to vlong.

--- a/vdir.c

+++ b/vdir.c

@@ -124,7 +124,8 @@

 void

 loaddirs(void)

 {

-	int fd, i, m;

+	int fd, i;

+	vlong m;

 	fd = open(path, OREAD);

 	if(fd<0){