I just set up an ftp server with Red Hat 5.2. I am doing the work, I'm baby stepping, but it seems like every step I get stuck. Currently, I'm trying to set up a crontab job, but I'm getting the following message: /bin/sh: /usr/bin/vi: No such file or directory. I see that vi exists in /bin/vi,... (3 Replies)
Hi all,
below is the problem details:
ora10g@CNORACLE1>which ld
/usr/ucb/ld
ora10g@CNORACLE1>cd /usr/ccs/bin
ora10g@CNORACLE1>ln -s /usr/ucb/ld ld
ln: cannot create ld: File exists
ora10g@CNORACLE1>
how to link it to /usr/ccs/bin? (6 Replies)
hi i have some perl scripts with shebang line as (#! /usr/bin/env perl ) instead of actual absolute path of perl ( i know why its that way ) everything works fine from command line , the problem is when i am trying to run those scripts from web ( local web tool ) it throws error as /usr/bin/env :... (6 Replies)
Hi!
All the basic linux commands, ie. echo, find, etc, are located in /bin. I have a couple of programs that have these commands pointed towards /usr/bin, ie, /usr/bin/echo (even though the actual 'echo' command is in /bin). How can I alias or redirect or link the /usr/bin to /bin just for this... (6 Replies)
Q1. I understand that /usr/local/bin means I can install/uninstall stuff in here and have any chance of messing up my original system files or effecting any other users. I created this directory myself.
But what about the directory I didn't create, namely /Users/m/bin? How is that directory... (1 Reply)
Hi Experts,
I found that the same commands(sort, du, df, find, grep etc.) exists in both dir.
What is the difference to use them?
i.e: to use xpg4/bin/grep and usr/bin/grep
My OS version is SunOS 5.10
Regards,
Saps (7 Replies)
I'm not sure if this is the default behavior for the ld command, but it does not seem to be looking in /usr/local/lib for shared libraries.
I was trying to compile the latest version of Kanatest from svn. The autorgen.sh script seems to exit without too much trouble:
$ ./autogen.sh
checking... (2 Replies)
Hi,
I installed ruby using rvm with root user on Linux.
Now i m trying the below command as a non root user with sudo privileges.
sudo /usr/local/rvm/rubies/ruby-2.2.5/bin/gem install passenger
I get the below error:
I had even reset the path for both gem as well as ruby as you... (8 Replies)
Discussion started by: mohtashims
8 Replies
LEARN ABOUT CENTOS
tevent_queue_tutorial
tevent_queue_tutorial(3) tevent tevent_queue_tutorial(3)NAME
tevent_queue_tutorial - The tevent_queue tutorial
Introduction
A tevent_queue is used to queue up async requests that must be serialized. For example writing buffers into a socket must be serialized.
Writing a large lump of data into a socket can require multiple write(2) or send(2) system calls. If more than one async request is
outstanding to write large buffers into a socket, every request must individually be completed before the next one begins, even if multiple
syscalls are required.
To do this, every socket gets assigned a tevent_queue struct.
Creating a serialized async request follows the usual convention to return a tevent_req structure with an embedded state structure. To
serialize the work the requests is about to so, instead of directly starting or doing that work, tevent_queue_add must be called. When it
is time for the serialized async request to do its work, the trigger callback function tevent_queue_add was given is called. In the example
of writing to a socket, the trigger is called when the write request can begin accessing the socket.
How does this engine work behind the scenes? When the queue is empty, tevent_queue_add schedules an immediate call to the trigger callback.
The trigger callback starts its work, likely by starting other async subrequests. While these async subrequests are working, more requests
can accumulate in the queue by tevent_queue_add. While there is no function to explicitly trigger the next waiter in line, it still works:
When the active request in the queue is done, it will be destroyed by talloc_free. Talloc_free of an serialized async request that had been
added to a queue will trigger the next request in the queue via a talloc destructor attached to a child of the serialized request. This way
the queue will be kept busy when an async request finishes.
Example
* Metze: Please add a code example here.
*
Version 0.9.8 Tue Jun 17 2014 tevent_queue_tutorial(3)