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Bug#419669: marked as done (apt-cache enters infinite loop on SIGPIPE/EPIPE)

Your message dated Thu, 13 Aug 2015 16:34:07 +0200
with message-id <20150813143407.GA4280@crossbow>
and subject line Re: apt-cache enters infinite loop on SIGPIPE/EPIPE
has caused the Debian Bug report #419669,
regarding apt-cache enters infinite loop on SIGPIPE/EPIPE
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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-- 
419669: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=419669
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: apt
Version: 0.6.46.4-0.1
Severity: normal

reportbug starts "apt-cache dumpavail" with its standard out to a
pipe, but apparently closes its side of the pipe before apt-cache is
finished.

This in itself is a bug in reportbug, but the problem with apt-cache
is that instead of failing gracefully (e.g. exit with a non-zero
return code), it enters an infinite loop.

Open fds of reportbug (parent of apt-cache):

reportbug 10131 master    0u   CHR  136,3                 5 /dev/pts/3
reportbug 10131 master    1u   CHR  136,3                 5 /dev/pts/3
reportbug 10131 master    2u   CHR  136,3                 5 /dev/pts/3

Open fds of apt-cache:

apt-cache 10138 master    0u   CHR  136,3                 5 /dev/pts/3
apt-cache 10138 master    1w  FIFO    0,6         223003182 pipe
apt-cache 10138 master    2u   CHR  136,3                 5 /dev/pts/3


Here's an strace of apt-cache:

--- SIGPIPE (Broken pipe) @ 0 (0) ---
close(3)                                = 0
stat("/var/lib/apt/lists/ftp.nl.debian.org_debian_dists_sid_main_binary-amd64_Packages", {st_mode=S_IFREG|0644, st_size=20747682, ...}) = 0
open("/var/lib/apt/lists/ftp.nl.debian.org_debian_dists_sid_main_binary-amd64_Packages", O_RDONLY) = 3
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
lseek(3, 15675021, SEEK_SET)            = 15675021
read(3, "Package: postgresql-contrib-7.4\n"..., 5047) = 5047
write(1, "Package: postgresql-contrib-7.4\n"..., 4096) = -1 EPIPE (Broken pipe)
--- SIGPIPE (Broken pipe) @ 0 (0) ---
close(3)                                = 0
stat("/var/lib/apt/lists/ftp.nl.debian.org_debian_dists_sid_main_binary-amd64_Packages", {st_mode=S_IFREG|0644, st_size=20747682, ...}) = 0
open("/var/lib/apt/lists/ftp.nl.debian.org_debian_dists_sid_main_binary-amd64_Packages", O_RDONLY) = 3
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
lseek(3, 15675021, SEEK_SET)            = 15675021
read(3, "Package: postgresql-contrib-7.4\n"..., 5047) = 5047
write(1, "Package: postgresql-contrib-7.4\n"..., 4096) = -1 EPIPE (Broken pipe)
--- SIGPIPE (Broken pipe) @ 0 (0) ---
close(3)                                = 0
stat("/var/lib/apt/lists/ftp.nl.debian.org_debian_dists_sid_main_binary-amd64_Packages", {st_mode=S_IFREG|0644, st_size=20747682, ...}) = 0
open("/var/lib/apt/lists/ftp.nl.debian.org_debian_dists_sid_main_binary-amd64_Packages", O_RDONLY) = 3
fcntl(3, F_SETFD, FD_CLOEXEC)           = 0
lseek(3, 15675021, SEEK_SET)            = 15675021
read(3, "Package: postgresql-contrib-7.4\n"..., 5047) = 5047
write(1, "Package: postgresql-contrib-7.4\n"..., 4096) = -1 EPIPE (Broken pipe)


-- Package-specific info:

-- apt-config dump --

APT "";
APT::Architecture "amd64";
APT::Build-Essential "";
APT::Build-Essential:: "build-essential";
Dir "/";
Dir::State "var/lib/apt/";
Dir::State::lists "lists/";
Dir::State::cdroms "cdroms.list";
Dir::State::userstatus "status.user";
Dir::State::status "/var/lib/dpkg/status";
Dir::Cache "var/cache/apt/";
Dir::Cache::archives "archives/";
Dir::Cache::srcpkgcache "srcpkgcache.bin";
Dir::Cache::pkgcache "pkgcache.bin";
Dir::Etc "etc/apt/";
Dir::Etc::sourcelist "sources.list";
Dir::Etc::sourceparts "sources.list.d";
Dir::Etc::vendorlist "vendors.list";
Dir::Etc::vendorparts "vendors.list.d";
Dir::Etc::main "apt.conf";
Dir::Etc::parts "apt.conf.d";
Dir::Etc::preferences "preferences";
Dir::Bin "";
Dir::Bin::methods "/usr/lib/apt/methods";
Dir::Bin::dpkg "/usr/bin/dpkg";
DPkg "";
DPkg::Pre-Install-Pkgs "";
DPkg::Pre-Install-Pkgs:: "/usr/sbin/dpkg-preconfigure --apt || true";

-- (no /etc/apt/preferences present) --


-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.18-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=fr_LU.UTF-8, LC_CTYPE=fr_LU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages apt depends on:
ii  debian-archive-keyring        2007.02.19 GnuPG archive keys of the Debian a
ii  libc6                         2.5-2      GNU C Library: Shared libraries
ii  libgcc1                       1:4.1.1-21 GCC support library
ii  libstdc++6                    4.1.1-21   The GNU Standard C++ Library v3

apt recommends no packages.

-- no debconf information

--- End Message ---
--- Begin Message --- 
Hi,

On Tue, Apr 17, 2007 at 12:13:51PM +0200, Lionel Elie Mamane wrote:
> reportbug starts "apt-cache dumpavail" with its standard out to a
> pipe, but apparently closes its side of the pipe before apt-cache is
> finished.
> 
> This in itself is a bug in reportbug, but the problem with apt-cache
> is that instead of failing gracefully (e.g. exit with a non-zero
> return code), it enters an infinite loop.


So, i tried reproducing this, but failed to be able. Given that we have
no other report of this behaviour I assume this was fixed some time in
the last 8 years and hence close the bugreport, but if you can reproduce
this still, feel free to reopen the bugreport of course!


Best regards

David Kalnischkies

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