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Top Forums Shell Programming and Scripting Efficient way to combine command Post 303010812 by SkySmart on Sunday 7th of January 2018 10:41:06 PM
Old 01-07-2018
Efficient way to combine command

im currently running the following command to grab all arguments in front of a script, directly from the process table.

Code:
# cat /tmp/allmyprocs
ubuntu    9933 27793  0 03:29 pts/0    00:00:00 /bin/sh ./prying.sh
ubuntu    9941  9933  0 03:29 pts/0    00:00:00 sh
ubuntu    9952  9941  0 03:29 pts/0    00:00:00 sh

Code:
myncurpid=9933
AFILENAME=prying.sh

cat /tmp/allmyprocs | awk -v JAG=9933 '$0 ~/ '${myncurpid}' / && ($2 == JAG) {print $0}' | awk -F"prying.sh" '{print substr($0,index($0,$NF))}'

which produces:

ubuntu    9933 27793  0 03:29 pts/0    00:00:00 /bin/sh ./prying.sh

Whenever there are no arguments passed to the "prying.sh" script, the above code outputs the entire line from the ps -ef command. I dont want that to happen. i dont want the entire line to be outputted whenever arguments are not passed.

In other words:

If there are no arguments passed to the script, print nothing.
If there are arguments passed to the script, print only those arguments.

my command is suppose to grab everything in front of prying.sh to the end of the line. but its not doing that.
 

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seeded-in-ubuntu(1)					      General Commands Manual					       seeded-in-ubuntu(1)

NAME
seeded-in-ubuntu - Determine whether a package is safe to upload during a freeze SYNOPSIS
seeded-in-ubuntu [options] package... DESCRIPTION
Lists all the current daily images containing the specified packages. Or whether the package is part of the supported seed. If it isn't on an image, it should be safe to upload. During the final freeze, one should avoid packages in the supported seed too. An index of the current manifests is downloaded from UbuntuWire. OPTIONS
-b, --binary The packages specified are binary packages. This is faster than source packages, as otherwise we must query LP to determine the binary packages that every specified source package builds. -u URL, --data-url=URL URL for index of seeded packages. Default: UbuntuWire's service at http://qa.ubuntuwire.org/ubuntu-seeded-packages/seeded.json.gz. -h, --help Display a help message and exit EXAMPLES
All the images that contain unity: seeded-in-ubuntu -b unity AUTHORS
seeded-in-ubuntu and this manpage were written by Stefano Rivera <stefanor@ubuntu.com>. Both are released under the terms of the ISC License. ubuntu-dev-tools December 2011 seeded-in-ubuntu(1)
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