Track Child process exit Post: 302440220

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1. Shell Programming and Scripting

Getting exit status of child in trap handler

Hi, I have a trap problem when calling a child script in the background. I know there are a lot of threads here on the issue of traps and signals, I think I have read all the relevant ones, but still haven't found an answer to my problem. I'm working on Linux or HP, the script as you can see...

2. UNIX for Dummies Questions & Answers

Exit from n th child shell

Hi, I am using ksh to write my shell script. I need to create multiple-level of nested sub shells in my script. Lets say I have at n th subshell. My question is how do I come out from there to main login shell. If I use 'exit' command then it is exiting from just one subshell and back to...

3. Shell Programming and Scripting

How to track exit status of ftp automation

ftp automation code is ftp -v -n -i $host_name << EOF user $u_name $u_pass bi mput $tar_file bye EOF How to check whether the file is successfully transfered or not. Suppose the user name or password is provided wrongly then the code should track the error and ask the end user to enter...

4. Programming

Why does my child process not exit?

Im sure it has something to do with the wait() call, but everything ive tried either leaves me with a zombie or with the exec executing indefinitely. switch(pid = fork()) { case -1:perror("fork failed"); exit(1); case 0: if(key == "cd") { execl("/bin/cd", "cd",...

5. Shell Programming and Scripting

How to make the parent process to wait for the child process

Hi All, I have two ksh script. 1st script calls the 2nd script and the second script calls an 'C' program. I want 1st script to wait until the 'C' program completes. I cant able to get the process id for the 'C' program (child process) to make the 1st script to wait for the second...

6. Shell Programming and Scripting

[KSH/Bash] Starting a parent process from a child process?

Hey all, I need to launch a script from within 2 other scripts that can run independently of the two parent scripts... Im having a hard time doing this, if anyone knows how please let me know. More detail. ScriptA (bash), ScriptB (ksh), ScriptC (bash) ScriptA, launches ScriptB ScirptB,...

7. Emergency UNIX and Linux Support

signal between parent process and child process

Hello, everyone. Here's a program: pid_t pid = fork(); if (0 == pid) // child process { execvp ...; } I send a signal (such as SIGINT) to the parent process, the child process receive the signal as well as the parent process. However I don't want to child process to receive the...

8. Shell Programming and Scripting

forking a child process and kill its parent to show that child process has init() as its parent

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...

9. Shell Programming and Scripting

Kill child processes when exit

Hi, I have parent script which is invoking multiple child scripts. I would want to kill all the child processes before the parent process exit. > cat ./parent #!/bin/ksh while do . ./child arg1 & if ; then break fi done Is there a way to get the process group id for all the child...

10. Shell Programming and Scripting

How to exit from the parent script while the child is running?

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...

LEARN ABOUT NETBSD

wait

WAIT(1) 						    BSD General Commands Manual 						   WAIT(1)

NAME

     wait -- await process completion

SYNOPSIS

     wait [pid]

DESCRIPTION

     If invoked with no arguments, the wait utility waits until all existing child processes in the background have terminated.

     Available operands:

     pid     If a pid operand is specified, and it is the process ID of a background child process that still exists, the wait utility waits until
	     that process has completed and consumes its status information, without consuming the status information of any other process.

	     If a pid operand is specified that is not the process ID of a child background process that still exists, wait exits without waiting
	     for any processes to complete.

     The wait utility exits with one of the following values:

     0	     The wait utility was invoked with no operands and all of the existing background child processes have terminated, or the process
	     specified by the pid operand exited normally with 0 as its exit status.

     >0      The specified process did not exist and its exit status information was not available, or the specified process existed or its exit
	     status information was available, and it terminated with a non-zero exit status.

     If the specified process terminated abnormally due to the receipt of a signal, the exit status information of wait contains that termination
     status as well.

STANDARDS

     The wait command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

BSD
								   June 5, 1993 							       BSD

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Getting exit status of child in trap handler

Discussion started by: rimon

2. UNIX for Dummies Questions & Answers

Exit from n th child shell

Discussion started by: indra_saha

3. Shell Programming and Scripting

How to track exit status of ftp automation

Discussion started by: Dip

4. Programming

Why does my child process not exit?

Discussion started by: p00ndawg