05-01-2009
I wouldn't think that having a child process would suddenly override traps. Could we see what the code for your script actually is?
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
this is (11 Replies)
Discussion started by: angelina
11 Replies
2. Shell Programming and Scripting
I am unable to execute the below command in background. Plz suggest.
#> ./test input >out &
913618
+ Stopped (SIGTTIN) ./test input >out &
Suresh (1 Reply)
Discussion started by: suresh3566
1 Replies
3. Shell Programming and Scripting
This is probably a failure in my understanding of trap or of function invocation. I'd really appreciate if someone could explain. This is Solaris 10, but I don't think it matters.
#!/usr/bin/ksh
trap 'cleanUp $@' exit
function cleanUp
{
print "I got called"
}
function check
{
... (4 Replies)
Discussion started by: plavacek
4 Replies
4. Shell Programming and Scripting
In my Bash script I have an exit/cleanup function in a trap statement like:
trap exitCleanup 1 2 3 6 15 25
Is there anyway to capture which signal # has occurred to record in a log file. Please note I am trying to avoid something like:
trap 'mySignal=1; exitCleanup' 1
trap... (1 Reply)
Discussion started by: ckmehta
1 Replies
5. AIX
Hello,
On Aix 5.3, during importvg, the varyonvg fails:
importvg -y vgtest hdisk20
0516-013 varyonvg: The volume group cannot be varied on because
there are no good copies of the descriptor area.
When i use manually the command varyonvg -u -b -t vgtest to force, the vg can... (3 Replies)
Discussion started by: dantares
3 Replies
6. UNIX for Dummies Questions & Answers
Hi everyone.
I wanted to print numbers from 1 to 5 in reverse order. For this I used the following code:
#!/bin/bash
x=5
while
do
echo $x
x=`expr $x - 1`
echo ""
done
echo ""
Well but on compiling the above code, it gives the following error.
... (3 Replies)
Discussion started by: grc
3 Replies
7. Solaris
Hello everyone,
I'm having a problem with a file. I can run any command on it : cp, mv, chmod,ln,more...
Thanks for your help (13 Replies)
Discussion started by: adilyos
13 Replies
8. AIX
Hi Friends,
I am not able to execute snap -a command in AIX 6 system. Could you please let me know how to make work this command and Path to be set.
Thanks in Advance
Siva. (4 Replies)
Discussion started by: sivakumarl
4 Replies
9. Shell Programming and Scripting
Hi
I am writing a script to get the CPU and memory utilization periodically from glance command.
Wrote a script which consists of below two lines
Script name : Utilization.sh
#!/bin/sh
glance -iterations 1 | sed -n '/Util/p/'| awk '!/Disk/'| awk '!/Swap/' >> file.txt
I am able to run the... (5 Replies)
Discussion started by: Shravani
5 Replies
10. UNIX for Advanced & Expert Users
Hi,
I was working on implementing error handling in my bash scripts, and decided to use trap to send myself an email incase of any errors. But it seems that somethings has gone wrong, and I am continuously getting same emails for an old error repeatedly (even though I have stopped/killed all... (1 Reply)
Discussion started by: cool.aquarian
1 Replies
FORK(2) System Calls Manual FORK(2)
NAME
fork - create a new process
SYNOPSIS
pid = fork()
int pid;
DESCRIPTION
Fork causes creation of a new process. The new process (child process) is an exact copy of the calling process except for the following:
The child process has a unique process ID.
The child process has a different parent process ID (i.e., the process ID of the parent process).
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 an lseek(2) 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.
The child processes resource utilizations are set to 0; see setrlimit(2).
RETURN VALUE
Upon successful completion, fork 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.
ERRORS
Fork will fail and no child process will be created if one or more of the following are true:
[EAGAIN] The system-imposed limit on the total number of processes under execution would be exceeded. This limit is configuration-
dependent.
[EAGAIN] The system-imposed limit MAXUPRC (<sys/param.h>) 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 ALSO
execve(2), wait(2)
3rd Berkeley Distribution May 22, 1986 FORK(2)