02-01-2004
Remember what fork() does! Both parent and child each printed three lines.
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1. UNIX for Dummies Questions & Answers
Is there any build in command in unix to kill all the child process for a given process ID ? If any one has script or command, please let me know.
Thanks
Sanjay (4 Replies)
Discussion started by: sanjay92
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2. Programming
Hi,
Can anybody solve this query?
A parent process forks 2 child processes. How does the child process know it's PID without the parent process sending it.
Apart from the "ps-ef" option, what other options are there if any? (2 Replies)
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3. UNIX for Advanced & Expert Users
Hi all,
Please look into the following code :
int main()
{
char command;
int pid, ppid;
ppid = getpid(); /* Get the parent pid */
pid = fork(); /* Fork */
if ( pid ==0 )
{
sprintf( command, " gdb a.out %d ", ppid );
printf( "Command line is %s\n", command );
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4. Shell Programming and Scripting
This is not the same as a few of the other posted items dealing with sub-process pids (that I saw anyway).
If zot contains:
echo "main mypid: $$ - lastpid: $!"
(
echo "block mypid: $$ - lastpid: $! - ppid: $PPID"
ps -ef > xxx
sleep 5
echo "block mypid: $$ - lastpid: $! - ppid:... (6 Replies)
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5. Shell Programming and Scripting
I am using ZSH shell in Linux.
I am calling a child program in background mode parallely (say 2-3 threads). I have problem in handling the temporary files of these child programs since the temp file names are unique for all the child process.
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6. UNIX for Dummies Questions & Answers
All,
I've got a script that needs to check if it was started by cron. The code seems to be right, but it's not running correctly if cron starts it. Am I getting the pid's correctly? I'm not having any luck figuring it out. :confused: Any help is appreciated!
CRON_ID=$(ps -aef | grep... (1 Reply)
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Hi,
I'm looking for a method where we can capture the PID and if possible the progress of child process especially the ones running in background.
can anyone help? (6 Replies)
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8. UNIX for Dummies Questions & Answers
Hi,
I need some help understanding PID and PPID that is shown by the ps -ef output. OS is Solaris 5.8. :wall:
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9. Red Hat
Hi ,
My problem is that I am not able to list all process id of any process.
If you see pstree command it shows many process id under https. But if I run ps command its not listing all the process id for httpd.
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10. Shell Programming and Scripting
HI
Am trying to get child process id for a PID using ksh..
ps -ef | grep xntpd
root 3342472 2228308 0 12:17:40 - 0:00 /usr/sbin/xntpd
root 4522024 6488316 0 12:18:56 pts/0 0:00 grep xntpd
root 6291614 3342472 0 12:17:40 - 0:00 /usr/sbin/xntpd
Here now i... (1 Reply)
Discussion started by: Priya Amaresh
1 Replies
ptree(1) General Commands Manual ptree(1)
NAME
ptree - prints the process tree hierarchy
SYNOPSIS
[pid1|username1 [pid2|username2]...]
DESCRIPTION
prints the process tree of all processes that match the specified arguments. While printing the tree, the child processes are indented to
the right from their respective parent processes.
Options
Prints the tree starting from the children of
(usually pid 0). The default is to print the tree starting from the children of (pid 1).
Operands
pid Print the process tree for the process ID number specified by pid.
username Print the process tree for all the processes from the user specified by username. Note that only username (and not user ID) can
be specified for this instance.
If no operands are specified, then prints the process tree of all processes starting from the children of or (if is specified).
EXTERNAL INFLUENCES
Environment Variables
If is not specified or is null, it defaults to (see lang(5)).
EXAMPLES
Print the process tree for pid 100 and for all processes owned by
WARNINGS
Process information can change while is running; the tree displayed by is only a snapshot in time. Some data printed for defunct processes
is irrelevant.
Users of must not rely on the exact field widths and spacing of its output, as these will vary depending on the system and the release of
HP-UX.
SEE ALSO
pgrep(1), pkill(1), ps(1), fork(2).
ptree(1)