05-08-2010
10 More Discussions You Might Find Interesting
1. Programming
As far as I can tell, the bash wait command waits for a logical "AND" of all the child processes.
Assuming I am coding in C:
(1) What is the function I would use to create multiple bash child process running perl?
(2) What is the function I would use to reinvent the bash wait command so I... (4 Replies)
Discussion started by: siegfried
4 Replies
2. Shell Programming and Scripting
Hi,
I am new this forum. I request you peoples help in understanding and finding some solution to my problem.
Here it goes:
I need to perform this set of actions by writing a shell script. I need to read a config file for the bunch of processes to execute.
I need to fecth the pid of... (4 Replies)
Discussion started by: sachin4sachi
4 Replies
3. Programming
I'm trying to make a program that will spawn multiple child processes then exit. I'm having trouble figuring out how to do this since after I fork, the child process begins running the program again (never ending).
int main(void){
for(int i = 0; i < 3; i++){
fork();
}... (1 Reply)
Discussion started by: cagney58
1 Replies
4. Shell Programming and Scripting
Code:
$ cat test.bash
#!/bin/bash
job=$1
steps=$2
num=$(echo "$@" | wc -w)
Example Submission:
$ ./test.bash BS01 3 1 2 3
What: (2 Replies)
Discussion started by: mkastin
2 Replies
5. Shell Programming and Scripting
Hi,
I would like to know how do I print the line # in a script. My requirement is, I have a script which is about ~5000 lines long. If there are any errors happen I just exit. And I would like to add the line # of the script where the error happened.
Thanks, (6 Replies)
Discussion started by: suryaemlinux
6 Replies
6. Shell Programming and Scripting
Hi,
when i grep for the process "XYZ" , there will be some good number of processes with that name, i want to kill all the these processes at a time using shell script?
Any help needed for this action.
Thanks
Regards,
Anil (6 Replies)
Discussion started by: anilmanepu
6 Replies
7. Shell Programming and Scripting
hey everyone,
I'm having some trouble breaking down some code. It's simple a control script that takes machines meant to be backed up from a list. Then according to that will run multi-threaded processes up until the specified thread limit.
for example if there are 4 machines to be backed up,... (2 Replies)
Discussion started by: terrell
2 Replies
8. Shell Programming and Scripting
Hi,
I have three files in my IN directory.Each file should be copied 25 times using for loop.Each file processing should run in parallel?How to spawn multiple processes in unix?Any help would be appreciated.
Thanks,
Liyakath (7 Replies)
Discussion started by: liyakathali
7 Replies
9. Shell Programming and Scripting
I am using a small script to divide some numbers in a given file and display the output in another file. I am getting the following error
basename: invalid option -- '5'
Try `basename --help' for more information.
(standard_in) 1: syntax error
The script is :
#!/bin/bash
for i in `cat... (4 Replies)
Discussion started by: kmnr877
4 Replies
10. Shell Programming and Scripting
Hello all,
I tried to parralise my treatments but after a while 'ps -ef' display all child process <defunct> (zombie)
Parent bash script to process all files (>100000) in directory:
for filename in /Data/*.txt; do
./child_pprocess.sh $filename &
done
exit(0)I understand that the... (1 Reply)
Discussion started by: namnetes
1 Replies
LEARN ABOUT FREEBSD
posix_spawnattr_destroy
POSIX_SPAWNATTR_INIT(3) BSD Library Functions Manual POSIX_SPAWNATTR_INIT(3)
NAME
posix_spawnattr_init, posix_spawnattr_destroy -- initialize and destroy spawn attributes object
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <spawn.h>
int
posix_spawnattr_init(posix_spawnattr_t * attr);
int
posix_spawnattr_destroy(posix_spawnattr_t * attr);
DESCRIPTION
The posix_spawnattr_init() function initializes a spawn attributes object attr with the default value for all of the individual attributes
used by the implementation. Initializing an already initialized spawn attributes object may cause memory to be leaked.
The posix_spawnattr_destroy() function destroys a spawn attributes object. A destroyed attr attributes object can be reinitialized using
posix_spawnattr_init(). The object should not be used after it has been destroyed.
A spawn attributes object is of type posix_spawnattr_t (defined in <spawn.h>) and is used to specify the inheritance of process attributes
across a spawn operation.
The resulting spawn attributes object (possibly modified by setting individual attribute values), is used to modify the behavior of
posix_spawn() or posix_spawnp(). After a spawn attributes object has been used to spawn a process by a call to a posix_spawn() or
posix_spawnp(), any function affecting the attributes object (including destruction) will not affect any process that has been spawned in
this way.
RETURN VALUES
Upon successful completion, posix_spawnattr_init() and posix_spawnattr_destroy() return zero; otherwise, an error number is returned to indi-
cate the error.
ERRORS
The posix_spawnattr_init() function will fail if:
[ENOMEM] Insufficient memory exists to initialize the spawn attributes object.
SEE ALSO
posix_spawn(3), posix_spawnp(3)
STANDARDS
The posix_spawnattr_init() and posix_spawnattr_destroy() functions conform to IEEE Std 1003.1-2001 (``POSIX.1'').
HISTORY
The posix_spawnattr_init() and posix_spawnattr_destroy() functions first appeared in FreeBSD 8.0.
AUTHORS
Ed Schouten <ed@FreeBSD.org>
BSD
March 24, 2008 BSD