Don't consider this as a bash bug. It's a misunderstanding by myself of the pipeline operation.
Maybe a comment should be included in the reference manual to cleary explain that the last command may try to open for writing the file still open for reading by the first command, and that such a situation obviously fails. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to bash in Ubuntu. https://bugs.launchpad.net/bugs/1737846 Title: bash fails to redirect standard output of a pipeline to the input file of the fist pipeline's command Status in bash package in Ubuntu: New Bug description: In a non-interactive bash session, redirecting the standard output to the file read by the pipeline's first command leads to random resuts : the redirection sometimes works, but generally the file is overwriten by an empty file. In an interactive session, the redirection works, which leads the user to look somewhere else to find a bug. However, when the last command is a user-writen function which simulates "cat", the resulting file is correct, as in an interactive session. Bash documentation does not prohibit such processing. Arbiel ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: bash 4.3-7ubuntu1.5 ProcVersionSignature: Ubuntu 3.13.0-106.153-generic 3.13.11-ckt39 Uname: Linux 3.13.0-106-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.23 Architecture: amd64 CurrentDesktop: Unity Date: Tue Dec 12 23:51:22 2017 InstallationDate: Installed on 2014-05-30 (1292 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) ProcEnviron: LANGUAGE=fr_FR PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash SourcePackage: bash UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bash/+bug/1737846/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
