Red Hat Bugzilla – Bug 106550
"file -z" hangs on examining some gzipped files
Last modified: 2007-11-30 17:10:32 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) Description of problem: file command hangs on examining some compressed files with the "-z" option. on my system: $ ls -l /usr/bin > lsl $ gzip lzl $ file lzl.gz # this works $ fils -z lsl.gz # this hangs "file -z" seems to work on short files, but inexplicably hangs on the above. (at least, after 20 seconds, i feel it's safe to kill it.) Version-Release number of selected component (if applicable): file-4.02-2 How reproducible: Always Steps to Reproduce: 1. ls -l /usr/bin > lsl 2. gzip lsl 3. file -z lsl.gz Additional info:
Probably a dup of bug 106424 - does upgrading zlib fix it?
No, zlib-1.2.0.7-2 upgrade does not fix. strace indicates gzip exec and probable child-before-parent problem. Hmmm, HAVE_LIBZ is deliberately undef'd, dunno. Off to look at file-4.04.
Yup, nuking the line #undef HAVE_LIBZ in src/compress.c restores file -z functionality. child-before-parent problem prolly still exists however.
FIxed in file-4.06-1.