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Top Forums Shell Programming and Scripting Piping to user application sometimes fail Post 302957122 by bertl100 on Wednesday 7th of October 2015 09:05:58 AM
Old 10-07-2015
Piping to user application sometimes fail

Hi,

currently, I have a problem in a stress test bash script.

i´m using the following command:

Code:
while true; do echo $"command" | ./myprogram; sleep 0.4; done

--> myprogram is watching for stdin via select

The problem is that it will work a couple of times. After that, the stdin fd from the application is going crazy and fires all the time with 100% cpu utilization because there is no valid stdin anymore.

I figured out to use "unbuffer" for this case but it doesn´t solve the problem but it makes is far better (much more tries before error on stdin).
 

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GIT-HASH-OBJECT(1)                                                  Git Manual                                                  GIT-HASH-OBJECT(1)

NAME
git-hash-object - Compute object ID and optionally creates a blob from a file SYNOPSIS
git hash-object [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin [--literally]] [--] <file>... git hash-object [-t <type>] [-w] --stdin-paths [--no-filters] DESCRIPTION
Computes the object ID value for an object with specified type with the contents of the named file (which can be outside of the work tree), and optionally writes the resulting object into the object database. Reports its object ID to its standard output. This is used by git cvsimport to update the index without modifying files in the work tree. When <type> is not specified, it defaults to "blob". OPTIONS
-t <type> Specify the type (default: "blob"). -w Actually write the object into the object database. --stdin Read the object from standard input instead of from a file. --stdin-paths Read file names from the standard input, one per line, instead of from the command-line. --path Hash object as it were located at the given path. The location of file does not directly influence on the hash value, but path is used to determine what Git filters should be applied to the object before it can be placed to the object database, and, as result of applying filters, the actual blob put into the object database may differ from the given file. This option is mainly useful for hashing temporary files located outside of the working directory or files read from stdin. --no-filters Hash the contents as is, ignoring any input filter that would have been chosen by the attributes mechanism, including the end-of-line conversion. If the file is read from standard input then this is always implied, unless the --path option is given. --literally Allow --stdin to hash any garbage into a loose object which might not otherwise pass standard object parsing or git-fsck checks. Useful for stress-testing Git itself or reproducing characteristics of corrupt or bogus objects encountered in the wild. GIT
Part of the git(1) suite Git 2.17.1 10/05/2018 GIT-HASH-OBJECT(1)
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