Where is the wait statement in the parent process? I do not see one.
The parent creates the child, then (immediately or a little later) waits for the child. That is how the parent process knows about the child's exit status.
I need to send the status from child shell failure to parent shell. I would like to know how could we accomplish this.
My parent.sh is as below:
#!/bin/ksh
set -x
echo "I am in parent shell now..."
child.sh
ret_stat=$?
echo "rest_stat=$ret_stat"
echo "I am below parent shell end..."
... (4 Replies)
Hi,
I have a requirement.
Scenario:
A parent job invokes a child job and gets killed. The child becomes orphan and gets attached to init. Child job is removed from the pid table as soon as it gets completed.
Requirement is i need the status of the child job even after the parent job is... (7 Replies)
Hi,
I haev to devlop a script which when executed will take in a sudo privelege and run a set of commands then will go back to parent shell and execute the rest of the command
But the problem I am facing is that when the script is executed it takes the sudo privelege but it waits for the... (0 Replies)
I have the following two Korn shell scripts:
SHELL1.ksh
#!/usr/bin/ksh
nohup sas /abc/123/sasprogram1.sas &
SHELL2.ksh
#!/usr/bin/ksh
./SHELL1.ksh
wait
nohup sas /abc/123/sasprogram2.sas &
My goal is to run SHELL1.ksh within SHELL2.ksh. SHELL1.ksh runs sasprogram1.sas. I would like... (1 Reply)
I have two shell scripts : A.sh and B.sh
A.sh
echo "In A"
exec B.sh
echo "After B"
B.sh
echo "In B"
The output is : In A
In B
I want the output : In A
In B
After B (4 Replies)
Hi everyone
i am very new to linux , working on bash shell.
I am trying to solve the given problem
1. Create a process and then create children using fork
2. Check the Status of the application for successful running.
3. Kill all the process(threads) except parent and first child... (2 Replies)
hi,
i want to call a child shell script from a parent shell script. the child will be running for 5 mins. normally when the child is running, parent will wait till the child completes. so in the above case parent will be paused for 5 mins. is there a way so that the parents does not wait for the... (3 Replies)
Viewers Please help me to get out of the below issue.. Thanks in advance
Required shell script for Monitoring status of the objects and it should update the child objects status as well.
Requirements:-
1. We are working on IIB (IBM Integration Bus v10) and trying to implement the broker ('... (0 Replies)
I have requirement where I need to fail parent if any one of the child process fails. Here is the code snippet
for i in 1 2 3 4 5 6 7 8 9 10
do
child_script $i &
done
wait
I need to fail my main script if any one of my child process fails (8 Replies)
Discussion started by: gvkumar25
8 Replies
LEARN ABOUT MOJAVE
preap
preap(1) User Commands preap(1)NAME
preap - force a defunct process to be reaped by its parent
SYNOPSIS
preap [-F] pid...
DESCRIPTION
A defunct (or zombie) process is one whose exit status has yet to be reaped by its parent. The exit status is reaped via the wait(3C),
waitid(2), or waitpid(3C) system call. In the normal course of system operation, zombies may occur, but are typically short-lived. This may
happen if a parent exits without having reaped the exit status of some or all of its children. In that case, those children are reparented
to PID 1. See init(1M), which periodically reaps such processes.
An irresponsible parent process may not exit for a very long time and thus leave zombies on the system. Since the operating system destroys
nearly all components of a process before it becomes defunct, such defunct processes do not normally impact system operation. However, they
do consume a small amount of system memory.
preap forces the parent of the process specified by pid to waitid(3C) for pid, if pid represents a defunct process.
preap will attempt to prevent the administrator from unwisely reaping a child process which might soon be reaped by the parent, if:
o The process is a child of init(1M).
o The parent process is stopped and might wait on the child when it is again allowed to run.
o The process has been defunct for less than one minute.
OPTIONS
The following option is supported:
-F Forces the parent to reap the child, overriding safety checks.
OPERANDS
The following operand is supported:
pid Process ID list.
EXIT STATUS
The following exit values are returned by preap, which prints the exit status of each target process reaped:
0 Successfully operation.
non-zero Failure, such as no such process, permission denied, or invalid option.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWesu (32-bit) |
+-----------------------------+-----------------------------+
| |SUNWesxu (64-bit) |
+-----------------------------+-----------------------------+
SEE ALSO proc(1), init(1M), waitid(2), wait(3C), waitpid(3C), proc(4), attributes(5)WARNINGS
preap should be applied sparingly and only in situations in which the administrator or developer has confirmed that defunct processes will
not be reaped by the parent process. Otherwise, applying preap may damage the parent process in unpredictable ways.
SunOS 5.10 26 Mar 2001 preap(1)