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Full Discussion: Check whether a process is alive or not
Top Forums UNIX for Dummies Questions & Answers Check whether a process is alive or not Post 302119645 by appleforme1415 on Thursday 31st of May 2007 06:32:40 AM
Old 05-31-2007
Quote:
Originally Posted by radoulov
Code:
$ sleep 5 &
[1] 24814
$ ps -p $! || echo "not running"
   PID TTY      TIME CMD
 24814 pts/1    0:00 sleep
$ 
[1]+  Done                    sleep 5
$ ps -p $! || echo "not running"
   PID TTY      TIME CMD
not running

If your ps doesn't support the p option, use "...|grep <pid>"

seems to be right solution for my second requirement.
tell me how can we suppress the output like
Quote:
PID TTY TIME CMD
24814 pts/1 0:00 sleep
I want only the output of "echo command" to be known and so that i can perform some check like ,if there is a value being returned ..it implies me ..Process is not running....

Can u shed some light on it ..i am new to unix
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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