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From: Jorg Walter
Subject: Bug in zip archiver
Date: Sat, 23 Jul 2005 22:19:09 +0200


PhysFS has a bug in the ZIP archive module, function zip_find_start_of_dir.
Upon encountering a substring match, rc is set to a wrong value. The fix is
simple: swap both assignments like this:

[patch below  --Ed.]

Some additional info for testing: Symptoms when you encounter this bug: A dir
is reported as empty although it has files in it; prerequisites or
encountering it: two dirs, one a substring of another, like "data/txt" and
"data/txt2", laid out in a way so that variable "middle" points to a file in
txt2 at some point during zip_find_start_of_dir

By the way, if you're interested in where PhysFS is used: I found this bug
while writing a patch for DOSBox ( to support
ZIP files. And I'd love to see that enhanced PHYSFS_mount syntax in an
official release soon *hint* ;);)
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icculus committed Jul 23, 2005
1 parent 092abfd commit 1affc7423017eb20bec2352534a764ffa75d68cf
Showing with 6 additions and 2 deletions.
  1. +1 −0 CHANGELOG
  2. +3 −0 CREDITS
  3. +2 −2 archivers/zip.c
@@ -4,6 +4,7 @@

-- stuff in the stable-1.0 branch, backported from 2.0.0 dev branch, etc ---

07232005 - Fixed bug in zip archiver (thanks, J�rg Walter!).
07132005 - Moved to zlib122, and security fix discussed here:
06122005 - Added support for mingw to Unix build process (thanks, Matze!).
@@ -76,6 +76,9 @@ Spanish translation:
Mingw support:
Matze Braun

Bug fixes:
J�rg Walter

Other stuff:
Your name here! Patches go to ...

@@ -1208,9 +1208,9 @@ static PHYSFS_sint32 zip_find_start_of_dir(ZIPinfo *info, const char *path,
if (rc == 0)
char ch = name[dlen];
if (ch < '/') /* make sure this isn't just a substr match. */
if ('/' < ch) /* make sure this isn't just a substr match. */
rc = -1;
else if (ch > '/')
else if ('/' > ch)
rc = 1;

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