I am doing a project for the university and I have to do that a process has to create several children through fork(). The father process sends a pathname to each one through exec and the children must send to the father a list with the files from each directory.
The father is waiting and the children don't send anything. I must to do the pipe with mkfifo. I am trying to send text from the children but nothing happens. This is the code that I have wroten:
In exec function say when i would like to remove the files
exec rm{}\;
Why is this "\" needed immediately after {} and what if i dont give it?
TIA,
Nisha (1 Reply)
Gurus,
I did my research (on google, this site and my local library) but I am *still* lost. I am trying to teach myself about `named pipes` playing around with MKFIFO (Why not?).
(1) It seems MKNOD is reserved to ROOT whereas MKFIFO is accessible to all users. Am I correct? If the answer is... (20 Replies)
I have read that exec "replaces the current process with a new one".
So I did
$ exec ls
and after this executed, my shell disappeared. I am assuming that my shell had PID xyz, and when I did exec ls, this ls got pid xyz, and when it terminated, there was no more shell process running, and... (5 Replies)
Hi all,
I had an issue regarding use of `` or exec in perl . `` are considered to be unsafe. Why? In my case an user would be giving some parameters as input and I will form an command of it and execute it using ``. It is important to capture output as i have to parse the output. As well as I need... (0 Replies)
Hello guys!
I am doing a project for the university and I have to do that a process has to create several children through fork(). The father process sends a pathname to each one through exec and the children must send to the father a list with the files from each directory.
The father... (1 Reply)
Hi,
on AIX 6.L
I want to copy the result of grep -v to test directory then :
`hostname`@oracle$ls -l | grep -v RINT -exec cp {} test
grep: can't open -exec
grep: can't open cp
grep: can't open {}
test:°`.
Can you help me ?
Thank you. (3 Replies)
Hi,
I need to delete the last N days file using find.
I am trying to use
find . -mtime -10 -print
which lists down required files.
but when i use
find . -mtime -10 -exec ls -lrt {} \;
it gives me all files in the directory including the required files but the required files... (7 Replies)
I have the following bash script lines in a file named test.sh.
#!/bin/bash
#
# Write Date to cron.log
#
echo "Begin SSI Load $(date +%d%b%y_%T)"
#
# Get the latest rates file for processing.
#
d=$(ls -tr /rms/data/ssi | grep -v "processed" | tail -n 1)
filename=$d
export filename... (3 Replies)
Discussion started by: ginowms
3 Replies
LEARN ABOUT DEBIAN
tapset::kprocess
TAPSET::KPROCESS(3stap)TAPSET::KPROCESS(3stap)NAME
tapset::kprocess - systemtap kernel process probe points
DESCRIPTION
This family of probe points is used to probe the kernel's process activities. It contains the following probe points:
kprocess.create
Fires whenever a new process is successfully created, either as a result of one of the fork syscall variants, or a new kernel
thread.
Arguments:
task
a handle to the newly created process
new_pid
pid of the newly created process
kprocess.start
Fires immediately before a new process begins execution.
Arguments:
N/A
kprocess.exec
Fires whenever a process attempts to exec to a new program
Arguments:
filename
the path to the new executable
kprocess.exec_complete
Fires at the completion of an exec call
Arguments:
errno
the error number resulting from the exec
success
a boolean indicating whether the exec was successful
kprocess.exit
Fires when a process terminates. This will always be followed by a kprocess.release, though the latter may be delayed if the process
waits in a zombie state.
Arguments:
code
the exit code of the process
kprocess.release
Fires when a process is released from the kernel. This always follows a kprocess.exit, though it may be delayed somewhat if the
process waits in a zombie state.
Arguments:
task
a task handle to the process being released
pid
pid of the process being released
SEE ALSO stap(1), stapprobes(3stap)Intel, IBMTAPSET::KPROCESS(3stap)