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Full Discussion: Question related to 'ps'
Top Forums UNIX for Dummies Questions & Answers Question related to 'ps' Post 302649601 by Corona688 on Thursday 31st of May 2012 07:14:28 PM
Old 05-31-2012
Quote:
Originally Posted by jawsnnn
Thanks for your suggestions. I actually know how to avoid the grep process in the output but was curious about the reason it turned up in the output at all.
The shell may actually create them all at the same time, effectively, i.e. all processes are created by the time ps[ and grep are exec-ed.
Quote:
While this thread is open, I have a lingering question. This code actually runs in one my scripts in a never ending loop to check whether the script is still running. To compensate for the extra grep command in the output, I actually made the code such that it checked for 2 lines in the output of the aforesaid combination of commands, i.e.

Code:
if [ `ps -ef | grep 'abc.sh'` -le 1 ]; then
 echo "Script ends"
fi

I'd never reccomend this code. -le is for integers, not strings, and certainly not for lines.
Quote:
I know that this way to monitor script's running status is probably not the best way to do it. But still, why would the output be inconsistent?
I'm not even sure how it ever worked in the first place.
 

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OSACOMPILE(1)						    BSD General Commands Manual 					     OSACOMPILE(1)

NAME
osacompile -- compile AppleScripts and other OSA language scripts SYNOPSIS
osacompile [-l language] [-e command] [-o name] [-d] [-r type:id] [-t type] [-c creator] [-x] [-s] [-u] [-a arch] [file ...] DESCRIPTION
osacompile compiles the given files, or standard input if none are listed, into a single output script. Files may be plain text or other compiled scripts. The options are as follows: -l language Override the language for any plain text files. Normally, plain text files are compiled as AppleScript. -e command Enter one line of a script. Script commands given via -e are prepended to the normal source, if any. Multiple -e options may be given to build up a multi-line script. Because most scripts use characters that are special to many shell programs (e.g., AppleScript uses single and double quote marks, ``('', ``)'', and ``*''), the command will have to be correctly quoted and escaped to get it past the shell intact. -o name Place the output in the file name. If -o is not specified, the resulting script is placed in the file ``a.scpt''. The value of -o partly determines the output file format; see below. -x Save the resulting script as execute-only. The following options are only relevant when creating a new bundled applet or droplet: -s Stay-open applet. -u Use startup screen. -a arch Create the applet or droplet for the specified target architecture arch. The allowable values are ``ppc'', ``i386'', and ``x86_64''. The default is to create a universal binary. The following options control the packaging of the output file. You should only need them for compatibility with classic Mac OS or for cus- tom file formats. -d Place the resulting script in the data fork of the output file. This is the default. -r type:id Place the resulting script in the resource fork of the output file, in the specified resource. -t type Set the output file type to type, where type is a four-character code. If this option is not specified, the creator code will not be set. -c creator Set the output file creator to creator, where creator is a four-character code. If this option is not specified, the creator code will not be set. If no options are specified, osacompile produces a Mac OS X format script file: data fork only, with no type or creator code. If the -o option is specified and the file does not already exist, osacompile uses the filename extension to determine what type of file to create. If the filename ends with ``.app'', it creates a bundled applet or droplet. If the filename ends with ``.scptd'', it creates a bun- dled compiled script. Otherwise, it creates a flat file with the script data placed according to the values of the -d and -r options. EXAMPLES
To produce a script compatible with classic Mac OS: osacompile -r scpt:128 -t osas -c ToyS example.applescript SEE ALSO
osascript(1), osalang(1) Mac OS X November 12, 2008 Mac OS X
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