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)
I have set the maximum no of file descriptors open in a process to the value 8192 using the following lines
set rlim_fd_max=8192
set rlim_fd_cur=8192
in the /etc/system file.
I rebooted the machine and the command ulimit -n / -Hn both display the limits as 8192. However when I run my... (2 Replies)
An application running on HP-UX constantly generates new text log files ( I think using logpipe ). Any new file created requires to be ftp'ed to an offline server, however I want to make sure that the current file being written should not be transferred.
For examples consider the following files... (3 Replies)
I'm trying to set the open files value to 4000 on a SLES 9 system.
Current values:ulimit -n
1024
I can set it using this:ulimit -n 4000
ulimit -n
4000
But this obviously sets it only for the shell session where I run the command to set it. I want to set this to 4000 for all time.
... (3 Replies)
I want to press "apple + T" to open a new terminal tab. This terminal tab must be in the same directory as the current one. Anyone knows how to do that?
Thanks a lot! (1 Reply)
Hi
How to increase maximum number of open file in "sco xenix binary" running in "sco unix openserver 5.0.7" ?
I have changed "NOFILES" kernel parameter to 512, but xenix binray can't open more than 60.
tnx (4 Replies)
Hi guys,
i need to write a shell script that will close file descriptors from /proc/pid/fd
will calling exec 4<&- solve the problem ?
thanks in advance :) (15 Replies)
I wrote a perl program that simultaneously reads in data from 691 tar.gz files using zcat. I can run one instance of the program without any issues and the memory and swap sizes are negligible. However, when I attempt to run more than 1 I start to get fork: resource unavailable messages. Are... (6 Replies)
Ubuntu users,
I am configuring an Ubuntu 14.04 server as a load injector.
I have appended the hard and soft limits to /etc/security/limits.conf for any user (apart from root):
* hard nofile 65536
* soft nofile 65536
I am seeing the figure 65536 in... (5 Replies)
Hello!
I am studying a course about computers using unix commands and I'm wondering how I can copy files from a file when I am on a different one in coding?
The question says what command copies the file fickur that is in the catalogue fickur to the catalogue digital?
current open... (1 Reply)
Discussion started by: Northernlightif
1 Replies
LEARN ABOUT BSD
close
CLOSE(2) System Calls Manual CLOSE(2)NAME
close - delete a descriptor
SYNOPSIS
close(d)
int d;
DESCRIPTION
The close call deletes a descriptor from the per-process object reference table. If this is the last reference to the underlying object,
then it will be deactivated. For example, on the last close of a file the current seek pointer associated with the file is lost; on the
last close of a socket(2) associated naming information and queued data are discarded; on the last close of a file holding an advisory lock
the lock is released (see further flock(2)).
A close of all of a process's descriptors is automatic on exit, but since there is a limit on the number of active descriptors per process,
close is necessary for programs that deal with many descriptors.
When a process forks (see fork(2)), all descriptors for the new child process reference the same objects as they did in the parent before
the fork. If a new process is then to be run using execve(2), the process would normally inherit these descriptors. Most of the descrip-
tors can be rearranged with dup2(2) or deleted with close before the execve is attempted, but if some of these descriptors will still be
needed if the execve fails, it is necessary to arrange for them to be closed if the execve succeeds. For this reason, the call ``fcntl(d,
F_SETFD, 1)'' is provided, which arranges that a descriptor will be closed after a successful execve; the call ``fcntl(d, F_SETFD, 0)''
restores the default, which is to not close the descriptor.
RETURN VALUE
Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and the global integer variable errno is set to
indicate the error.
ERRORS
Close will fail if:
[EBADF] D is not an active descriptor.
SEE ALSO accept(2), flock(2), open(2), pipe(2), socket(2), socketpair(2), execve(2), fcntl(2)4th Berkeley Distribution May 22, 1986 CLOSE(2)