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An empty file does not have a positive number of lines.

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Make sure that the number of lines read is non-zero before in order to
avoid dumping core.

Reported by:	Wojciech A. Koszek
Pointy hat to:	cperciva
This commit is contained in:
Colin Percival 2005-11-20 00:50:30 +00:00
parent 359d438885
commit 3d19fd3190
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=152625
1 changed files with 7 additions and 0 deletions
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7
usr.sbin/portsnap/make_index/make_index.c
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@ -411,6 +411,7 @@ printport(PORT * p)
/*
* Algorithm:
* 1. Suck in all the data, splitting into fields.
* 1a. If there are no ports, there is no INDEX.
* 2. Sort the ports according to port directory.
* 3. Using a binary search, translate each dependency from a
* port directory name into a pointer to a port.
@ -469,6 +470,12 @@ main(int argc, char *argv[])
if (fclose(f) != 0)
err(1, "fclose(%s)", argv[1]);
/*
* 1a. If there are no ports, there is no INDEX.
*/
if (pplen == 0)
return 0;
/*
* 2. Sort the ports according to port directory.
*/