bug#5817: false core util
Bob Proulx wrote: phoenix wrote: I've found a serious error in the program false: If I pipe some text to it (e.g. echo i lost the game | false), it does not fail but rather returns a success. Any suggestions? ... In order to get the coreutils version you would need to specify a path to it. But the shell should still detect this error. Since it has been two weeks and we haven't heard any replies I am going to assume that the information supplied solved your problem and that this bug can be closed. If you have additional information please feel free to add it to the bug report. Thanks, Bob
bug#5817: false core util
tags 5817 + moreinfo unreproducible thanks phoenix wrote: I've found a serious error in the program false: If I pipe some text to it (e.g. echo i lost the game | false), it does not fail but rather returns a success. Any suggestions? As others noted the 'false' command is a builtin to most shells. Therefore if you execute the following you are not getting the coreutils version of false but are instead getting your shell builtin version of false. In this case I am running bash and bash detects the error. $ echo foo | false -bash: echo: write error: Broken pipe $ echo $? 1 $ type false false is a shell builtin $ help false false: false Return an unsuccessful result. In order to get the coreutils version you would need to specify a path to it. But the shell should still detect this error. $ echo foo | /bin/false -bash: echo: write error: Broken pipe $ echo $? 1 The main reason for a standalone executable is for legacy compatibility and also on those occations when a program that isn't a shell needs to exec a program. I need this program very much for completing my thesis on Pseudo-Riemannian manifolds. Nice! And on April 1st too! It would very kind of you if you'd inform me when the error has been fixed. (Remark: I am using Ubuntu 9.10.) I do not presently have an Ubuntu system available to test this upon but I believe it to be a problem specific to either your shell or to your environment. Coreutils false doesn't have this problem. Neither does Debian which as you know is the basis for Ubuntu. Humorous Side Note: It has been remarked that false is actually more portable than true. Because if it doesn't exist the shell's exit status is still failure. Bob
bug#5817: false core util
Hey guys, I've found a serious error in the program false: If I pipe some text to it (e.g. echo i lost the game | false), it does not fail but rather returns a success. Any suggestions? I need this program very much for completing my thesis on Pseudo-Riemannian manifolds. It would very kind of you if you'd inform me when the error has been fixed. (Remark: I am using Ubuntu 9.10.) Best regards, Hajo Pei
bug#5817: false core util
On 4/1/2010 7:49 AM, phoenix wrote: Hey guys, I've found a serious error in the program false: If I pipe some text to it (e.g. echo i lost the game | false), it does not fail but rather returns a success. Any suggestions? I need this program very much for completing my thesis on Pseudo-Riemannian manifolds. It would very kind of you if you'd inform me when the error has been fixed. (Remark: I am using Ubuntu 9.10.) Best regards, Hajo Pei You must be checking it wrong because on Ubuntu 9.10 here it correctly returns an exit status of 1 for failure.
bug#5817: false core util
On 04/01/2010 10:06 AM, Phillip Susi wrote: On 4/1/2010 7:49 AM, phoenix wrote: Hey guys, I've found a serious error in the program false: If I pipe some text to it (e.g. echo i lost the game | false), it does not fail but rather returns a success. Any suggestions? What shell are you using? Typically, false is also a shell builtin, so maybe your particular shell has a bug. -- Eric Blake ebl...@redhat.com+1-801-349-2682 Libvirt virtualization library http://libvirt.org signature.asc Description: OpenPGP digital signature
