Bug#389762: man-db: cannot select manpage correctly with LANG=ja_JP.UTF-8
tags 389762 fixed-upstream thanks On Wed, Dec 03, 2008 at 12:35:58PM +, Colin Watson wrote: The case of select is somewhat confusing. There's an ordinary page in section 2 (both for English and Japanese), which is straightforward. If you install manpages-posix-dev then there's also an ordinary page in section 3 with extension posix. However, manpages-dev installs links to select(2) as both FD_ZERO(2) and FD_ZERO(3) (I don't know why), and the section 3 version is spotted when doing a database lookup. This is why you get the duplication of /usr/share/man/man2/select.2.gz - at the level where man is checking for duplicate candidates, it sees that they're in different sections and therefore distinct, but it hasn't realised that the section 3 page is actually a symlink into section 2. As of man-db 2.5.0, there are databases for non-English hierarchies as well, and I think this has papered over the problem because the bizarre section 3 page shows up for Japanese as well. However, the fact that the duplication isn't noticed and the fact that the whole list isn't properly sorted are still bugs. For my own reference: it would probably be best to fix the sorting first, since I have a good reproduction case here. I've now fixed this for the next upstream release (man-db 2.5.4). On my system, the bug showed up as follows: $ man -aw select /usr/share/man/man2/select.2.gz /usr/share/man/man2/select.2.gz /usr/share/man/man3/select.3posix.gz $ LC_ALL=ja_JP.UTF-8 man -aw select /usr/share/man/ja/man2/select.2.gz /usr/share/man/man2/select.2.gz /usr/share/man/ja/man2/select.2.gz /usr/share/man/man2/select.2.gz /usr/share/man/man3/select.3posix.gz The corrected version behaves as follows instead: $ src/man -aw select /usr/share/man/man2/select.2.gz /usr/share/man/man3/select.3posix.gz $ LC_ALL=ja_JP.UTF-8 src/man -aw select /usr/share/man/ja/man2/select.2.gz /usr/share/man/man2/select.2.gz /usr/share/man/man3/select.3posix.gz Mon Dec 8 10:08:45 GMT 2008 Colin Watson [EMAIL PROTECTED] Improve sorting and de-duplication of manual page candidates (Debian bug #389762). * src/man.c (struct candidate): Add ult member. (duplicate_candidates): Pare down to only check for duplication rather than trying to compare as well; the latter function is now handled entirely by compare_candidates. Compare the ultimate source file as the first test. (compare_candidates): Compare locale elements in candidate paths before comparing sections. (add_candidates): Look up the ultimate source file if necessary, and save it in the candidate structure. Use duplicate_candidates for duplicate testing only and compare_candidates for comparison. Insert elements at the latest possible position rather than the earliest possible. (try_section): Pass the ultimate source file that was already looked up here. (try_db): Adjust for new add_candidate signature. Thanks for helping to improve man-db! -- Colin Watson [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Bug#389762: man-db: cannot select manpage correctly with LANG=ja_JP.UTF-8
On Thu, Sep 28, 2006 at 12:08:38AM +0900, KISE Hiroshi wrote: case 1: installed manpages-dev and manpages-ja-dev, not installed manpages-posix-dev $ LANG=ja_JP.UTF-8 man -a -w select /usr/share/man/man2/select.2.gz /usr/share/man/ja/man2/select.2.gz /usr/share/man/man2/select.2.gz $ LANG=ja_JP.UTF-8 man -w select /usr/share/man/man2/select.2.gz It's incorrect. I expected result /usr/share/man/ja/man2/select.2.gz. This particular instance of the problem is not reproducible any more, but I think the underlying bug is still present. man processes the manpath twice (at least if you use -a). In the first phase, it looks in the filesystem; in the second phase, it looks in its database. In each phase it looks through the possible sections and tries to determine which pages are preferable. The case of select is somewhat confusing. There's an ordinary page in section 2 (both for English and Japanese), which is straightforward. If you install manpages-posix-dev then there's also an ordinary page in section 3 with extension posix. However, manpages-dev installs links to select(2) as both FD_ZERO(2) and FD_ZERO(3) (I don't know why), and the section 3 version is spotted when doing a database lookup. This is why you get the duplication of /usr/share/man/man2/select.2.gz - at the level where man is checking for duplicate candidates, it sees that they're in different sections and therefore distinct, but it hasn't realised that the section 3 page is actually a symlink into section 2. As of man-db 2.5.0, there are databases for non-English hierarchies as well, and I think this has papered over the problem because the bizarre section 3 page shows up for Japanese as well. However, the fact that the duplication isn't noticed and the fact that the whole list isn't properly sorted are still bugs. For my own reference: it would probably be best to fix the sorting first, since I have a good reproduction case here. Thanks, -- Colin Watson [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Bug#389762: man-db: cannot select manpage correctly with LANG=ja_JP.UTF-8
Package: man-db Version: 2.4.3-3 Severity: important case 1: installed manpages-dev and manpages-ja-dev, not installed manpages-posix-dev $ LANG=ja_JP.UTF-8 man -a -w select /usr/share/man/man2/select.2.gz /usr/share/man/ja/man2/select.2.gz /usr/share/man/man2/select.2.gz $ LANG=ja_JP.UTF-8 man -w select /usr/share/man/man2/select.2.gz It's incorrect. I expected result /usr/share/man/ja/man2/select.2.gz. case 2: installed manpages-dev, manpages-ja-dev and manpages-posix-dev $ LANG=ja_JP.UTF-8 man -a -w select /usr/share/man/man2/select.2.gz /usr/share/man/ja/man2/select.2.gz /usr/share/man/man2/select.2.gz /usr/share/man/man3/select.3posix.gz $ LANG=ja_JP.UTF-8 man -w select /usr/share/man/ja/man2/select.2.gz It's correct. $ egrep ^SECTION /etc/manpath.config SECTION 1 n l 8 3 2 3posix 3pm 3perl 5 4 9 6 7 I attached debug outputs of man -d -w select for each case. man-debug-1.txt for case 1, man-debug-2.txt for case 2. (file encoding is UTF-8) -- System Information: Debian Release: testing/unstable APT prefers testing APT policy: (500, 'testing') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.17-2-686 Locale: LANG=ja_JP.eucJP, LC_CTYPE=ja_JP.eucJP (charmap=EUC-JP) Versions of packages man-db depends on: ii bsdmainutils 6.1.4 collection of more utilities from ii debconf [debconf-2.0]1.5.4 Debian configuration management sy ii dpkg 1.13.21 package maintenance system for Deb ii groff-base 1.18.1.1-12 GNU troff text-formatting system ( ii libc62.3.6.ds1-4 GNU C Library: Shared libraries ii libgdbm3 1.8.3-3 GNU dbm database routines (runtime man-db recommends no packages. -- debconf information: man-db/build-database: true man-db/rebuild-database: true * man-db/install-setuid: false man-debug.tar.gz Description: Binary data
