Package: zlib1g
Version: 1:1.2.2-3
Severity: important
Tags: patch
When reading a compressed file using gzread(), once EOF has been reached
gzread() returns 0. From this point onward, gzread() always returns 0
even if the file continues to grow. This makes it impossible to tail (as
in tail -f) a continuously growing file. Problem is in the way gzread()
determines EOF. I am attaching a patch to fix this problem. I am sending
this bug report and patch to upstream zlib maintainer, Jean-Loup, as well.
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (500, 'testing'), (1, 'experimental')
Architecture: ia64
Kernel: Linux 2.6.8-1-mckinley
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Versions of packages zlib1g depends on:
ii libc6.1 2.3.2.ds1-20 GNU C Library: Shared libraries an
-- no debconf information
diff -urN zlib-1.2.2.orig/gzio.c zlib-1.2.2/gzio.c
--- zlib-1.2.2.orig/gzio.c 2004-10-03 22:30:37.000000000 -0400
+++ zlib-1.2.2/gzio.c 2005-03-01 16:43:05.000000000 -0500
@@ -403,7 +403,9 @@
if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR;
if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1;
- if (s->z_err == Z_STREAM_END) return 0; /* EOF */
+ if (s->z_eof == 1) {
+ return 0; /* EOF */
+ }
next_out = (Byte*)buf;
s->stream.next_out = (Bytef*)buf;
--
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