Kill process by his name

Hi

is it possible to kill a process by his name without using directly a
program of the OS used ? I mean without using system(…) or ....

David.

On 26.09.2006 17:14, David C. wrote:

is it possible to kill a process by his name without using directly a
program of the OS used ? I mean without using system(…) or ....

I doubt it. For completeness reasons: That would be on what OS?

Kind regards

robert

David C. wrote:

Hi

is it possible to kill a process by his name without using directly a
program of the OS used ? I mean without using system(…) or ....

No. That is not generally supported even on POSIX systems
(hence the killall command). You can parse the process list,
grab the PID and issue a kill on it.

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Eero S. wrote:

David C. wrote:

is it possible to kill a process by his name without using directly a
program of the OS used ? I mean without using system(…) or ....

No. That is not generally supported even on POSIX systems
(hence the killall command). You can parse the process list,
grab the PID and issue a kill on it.

Here is an example. Suppose you wanted to kill all existing
processes of the current program:

pidList = ps -C #{File.basename $0} -o pid.split.map! {|s| s.to_i}
pidList.shift # discard header
pidList.reject! {|pid| pid == $$}

pidList.each do |pid|
Process.kill :SIGTERM, pid
end

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Here’s a better way to write the above:

pidList = ps -C #{File.basename $0} -o pid.
split[1…-1]. # discard header from ps output
map! {|s| s.to_i}.
reject! {|pid| pid == $$}

pidList.each do |pid|
Process.kill :SIGTERM, pid
end

Couldn’t you take it all the way to this?

ps -C #{File.basename $0} -o pid h. # no header
map! {|s| s.to_i}.
reject! {|pid| pid == $$}.
each {|pid| Process.kill :SIGTERM, pid}

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Philip H. wrote:

Couldn’t you take it all the way to this?

Wonderful! Thank you :slight_smile:

ps -C #{File.basename $0} -o pid h. # no header
map! {|s| s.to_i}.

I’m a bit confused here. String class does not have a #map or #map!
method, so how is this working?

reject! {|pid| pid == $$}.
each {|pid| Process.kill :SIGTERM, pid}

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On 26.09.2006 20:52, Suraj N. Kurapati wrote:

I’m a bit confused here. String class does not have a #map or #map!
method, so how is this working?

You sure about that?

“foo\nbar”.map {|x| x}
=> [“foo\n”, “bar”]

:slight_smile:

Kind regards

robert

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Suraj N. Kurapati wrote:

pidList.each do |pid|
Process.kill :SIGTERM, pid
end

Here’s a better way to write the above:

pidList = ps -C #{File.basename $0} -o pid.
split[1…-1]. # discard header from ps output
map! {|s| s.to_i}.
reject! {|pid| pid == $$}

pidList.each do |pid|
Process.kill :SIGTERM, pid
end
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ftgHBiEredpMSOatibeylZI=
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David C. wrote:

Hi

is it possible to kill a process by his name without using directly a
program of the OS used ? I mean without using system(…) or ....

David.

isnt this generally a bad idea?
process names are mostly not unique right?

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