In this line, first stderr is redirected to whatever stdout is pointing at that time. Then stdout is redirected to a file, but that doesn't influence the first redirection anymore.
So, what's the influence of redirect stderr to stdout. It doesn't affect, does it? In other words, any difference between above instruction and:
Quote:
./command 1> mylog.log
which only redirects stdout to a file?
On the other hand, to understand the large instruction, I guess I need to understand better what means "subshell", and how tee works, as well as descriptor 3. I'll google...
Hi,
I have written a daemon process, to perform certain operations in the background.
For this I have to close, the open file descriptors,
Does anybody know how to find out the number of open file descriptors ?
Thanks in Advance,
Sheetal (2 Replies)
Hello all,
A few questions on file descriptors ...
scenario : Sun Ultra 30 with Sun OS 5.5.1 , E250 with Solaris 2.6
In one of my servers, the file descriptor status from the soft limit and hard limits are 64 and 1024 respectively for root user.
Is the soft limit (64) represents the... (3 Replies)
i m trying to learn processes in unix and i've been reading this but i don't quite get it. its regarding file descriptors. : each is a part of file pointers, they point to another area. indexes into an Operating system maintained table called "file descriptor table". one table per process. may... (3 Replies)
I am in a Systems programming class this semester, and our current project is to write a program utilizing sockets and fork. For the project, I decided to make my own instant messaging program. I have the code completed, but I have a problem that keeps old clients from communicating with new... (3 Replies)
Hi All,
This thread is going to be a discussion basically bringing out more information from the experts on cron jobs and the associated file handles.
So, here is the question.
There is definitely a constant ' n ' as the maximum number of file handles alloted to a process ' p '.
Will... (7 Replies)
hello,
I have written a script named listall.sh with the following codes init.
#!/bin/bash
PATH="/proj/cmon/$1"
echo $PATH
if ; then
echo "Usage: $0 ***"
exit 1
else
ls -l $PATH/*.sc
fi
Here there are 3 subdirectories (namely - src, data and jobs)under /proj/cmon, so... (2 Replies)
Hi,
I speak and write english more or less, so I hope my asking be clear.
:)
In the company I am working, they are using control-m software to lunch
shell scripts.
So i put this command in all shell scripts:
export LOGFILE_tmp=$PRODUC_DATA/tmp/${SCRIPT}_${PAIS}_`date... (0 Replies)
What is the difference between a file descriptor and a semaphore?
My basic understanding is:
- a file descriptor is a small positive integer that the system uses instead of the file name to identify an open file or socket.
- a semaphore is a variable with a value that indicates the... (1 Reply)
Hi Guys,
First of all I am not entirely sure if this is the correct way of doing what I need to be done. I have tried to google for some suggestions and so far it got me more confused.
Basically what I need is to pipe the output of a program to a function in KSH and inside the function some... (1 Reply)
Hi, I'm playing with KSH
I entered following command in terminal
{ echo "stdout" >&1; echo "stderr" >&2; } > out
And I get only stoud in a new file out.
My question is: Where did my stderr vanish ? (5 Replies)