Full Discussion: Debugging shell scripts
Top Forums Shell Programming and Scripting Debugging shell scripts Post 302354875 by proactiveaditya on Sunday 20th of September 2009 04:26:48 PM
Old 09-20-2009
Debugging shell scripts

Any there any utilities or ways of debugging shell scripts?

I know something like: sh -x <script>

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FLOCK(1)						    BSD General Commands Manual 						  FLOCK(1)

flock -- Provide locking API for shell scripts SYNOPSIS
flock [-dnosvx] [-w timeout] lockfile|lockdir [-c command] | [command ...] flock [-dnsuvx] [-w timeout] lockfd DESCRIPTION
The flock utility provides flock(2) access to the command line or scripts. The first form locks a file or directory while the command pro- vided is executed. If the file or directory does not exist, then a file is created. The second form can use an arbitrary file descriptor that is provided from a shell script for example: ( flock -s 100 # commands to be executed under the lock ) 100> /path/to/lockfile The following options are available: -c command Pass a command to a the shell. -d, --debug Provide debugging output. -n, --nb, --nonblock Don't block and fail immediately if the lock could not be obtained. -o, --close Close the file before executing the command. This is useful if the child forks and should not be holding the lock. -s, --shared Obtain a shared lock. -u, --unlock Unlock an existing lock. This is available only for a file descriptor. -v, --verbose On error print an explanation of the failure. -w, --wait, --timeout seconds Fail if the lock could not be obtained after seconds. -x, --exclusive Obtain an exclusive lock. EXIT STATUS
The flock utility exits 0 on success, and >0 if an error occurs. SEE ALSO
shlock(1), flock(2) HISTORY
An flock utility appeared in NetBSD 6.1. BSD
November 2, 2012 BSD

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