C program to make an exact copy of the current process in Ubundu
Hi All,
I am new to Linux and i need your for a program which makes the exact copy of the running process. I have got some codes but it only works for the first command and will not work for subsequent commands. Means it works for "ps" but will not work for "ps u". I have changed the code to accept the whole string but still the output for two word commands are not appearing. Hope some one can give me a help. My codes are below.
Last edited by radoulov; 05-01-2010 at 07:21 PM..
Reason: Code tags, please!
I ask this question since sometimes i run a time-consuming ftp in foreground and forget to use nohup ftp.sh & to put this work background and can still running after i log off.
Assume this ftp task have run 1 hour, and still 1 hour time to end,
i don't want to abort the ftp, first, i use ctrl+Z... (3 Replies)
Hi Gurus,
I have two processes running on a Unix box, named say, PRCS1 and PRCS1X.
I want to check whether process PRCS1 is running or not, and depending on that I have to make further decisions while writing a shell script.
I am using: ps -eaf|grep PRCS1|grep -v grep
But the... (2 Replies)
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... (7 Replies)
I have been having some trouble trying to get some code working, so I was wondering...what system calls are required to execute a different program from an already running process? (1 Reply)
I am working on one script where I need to grep the exact process in perl script.
for e.g. when I run simple grep command on the linux machine it gives me two process mGateway_mvc_q01 and mGateway_mvc_q01_v7 which is not the correct result.I tried to use ( ps -eAf | grep ^mGateway_mvc_q01$) but... (1 Reply)
Hi,
I have written a menu driven shell script in which as per the choice, I run the another script on background.
For eg:
1. get info
2)process info
3)modify info
All the operations have different scripts which i schedule in background using &.
However I wish to display the error... (0 Replies)
To Solaris 8 Experts,
Please let me know what's the best method / procedure as well as the Solaris 8 commands for accomplishing the following tasks on a production Sun Enterprise 250 Server running Sun Solaris 8 Operating System:
1. Make an exact image/copy of the SCSI Hard Drive in the... (3 Replies)
Team,
I have multiple batchjobs running in VM, if I do ps -ef |grep java or tomcat I am getting multiple process list.
How do I get my exact tomcat process running and that is unique? via shell script? (4 Replies)
Please do not post a technical question in the @How to contact....' forum. I have moved this for you.
Hello Everyone,
Please help me on this,
Requirement here is to check whether the process is running using the process id.
For the below scenario, I m trying to grep 1750 process id to... (3 Replies)
Discussion started by: Hari A
3 Replies
LEARN ABOUT ULTRIX
fork
fork(2) System Calls Manual fork(2)Name
fork - create a new process
Syntax
#include <sys/types.h>
#include <unistd.h>
pid = fork()
pid_t pid;
Description
The system call causes creation of a new process. The new process (child process) is an exact copy of the calling process except for the
following:
o The child process has a unique process ID.
o The child process has a different parent process ID (that is, the process ID of the parent process).
o The child process has its own copy of the parent's descriptors. These descriptors reference the same underlying objects, so that, for
instance, file pointers in file objects are shared between the child and the parent, so that a on a descriptor in the child process
can affect a subsequent read or write by the parent. This descriptor copying is also used by the shell to establish standard input
and output for newly created processes as well as to set up pipes.
o The child processes resource utilizations are set to 0. For further information, see
Return Values
Upon successful completion, returns a value of 0 to the child process and returns the process ID of the child process to the parent
process. Otherwise, a value of -1 is returned to the parent process, no child process is created, and the global variable errno is set to
indicate the error.
Diagnostics
The system call fails and no child process are created under the following conditions:
[EAGAIN] The system-imposed limit {PROC_MAX} on the total number of processes under execution would be exceeded.
[EAGAIN] The system-imposed limit {CHILD_MAX} on the total number of processes under execution by a single user would be exceeded.
[ENOMEM] There is insufficient swap space for the new process.
See Alsoexecve(2), wait(2)fork(2)