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Top Forums Shell Programming and Scripting Shell script runs fine in Solaris, in Linux hangs at wait command Post 302467892 by agama on Sunday 31st of October 2010 11:33:40 PM
Old 11-01-2010
This might be a bug in the version of ksh that you have which is likely fixed in the current release.

I'm running 'Version JM 93t+ 2009-02-02' on some boxes, and 'Version JM 93t+ 2010-06-21' on most of my linux boxes. Testing on the older of the two it handled your script without any problems:

Code:
>>>start: Sun Oct 31 23:18:46 EDT 2010
jobs output
[2] +  Running                 <command unknown>
[1] -  Running                 <command unknown>
jobs -p  
Before entering parallel process  18154 
>>>finish: Sun Oct 31 23:18:46 EDT 2010

I added start/finish messages to show the delay, if there was any. There is a more recent release than the 6/21/2010 version; it can be pulled direcly from AT&T Labs-Research; AST software download

As a further test, I put this little script together that reads lines with one or more sleep times and sets that many async sleep processes going. It is similar to the script you are running and it seems to have no issues with a more recent version of ksh.

Code:
while read list
do
        for x in $list
        do
                echo "$(date) sleeping $x"
                sleep $x &
        done

        echo "$(date) waiting"
        wait
        echo "$(date) looping"
done <xx

 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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