Are you talking about writing a program to monitor a FIFO pipe so the program will sleep untill another program activates the pipe then the first program will wake up and do it's bit ?
Here's a small C section to do that
It is used from one terminal as:
Quote:
redhead@sindre{56} ~/Programming> ./a.out &
[1] 5035
redhead@sindre{57} ~/Programming> cat my_fifo_fil
You woke me poking my fifo my_fifo_fil
Program Woken at: Tue Nov 10 17:38:40 2009
[1] Done ./a.out
I'm very new to unix. I need help in writing a shell script that will automatically take output file from a particular folder from a server and if the file is generated send email notifications to certain group of ppl and if it is not generated send a mail wid error msg..
can any1 help me on... (2 Replies)
I'm very new to unix. I need help in writing a shell script that will automatically take output file from a particular folder from a server and if the file is generated send email notifications to certain group of ppl and if it is not generated send a mail wid error msg..
can any1 help me on... (4 Replies)
I want to gzip a file and append the creation date to the end of the file. How can I accomplish this task. Basically they are log files which need a creation date stamp appended to make sure they do not overwrite other log files.
-jack (3 Replies)
Hi,
I am quite new to Perl scripting and i need to create a .TXT file using perl, with fields (A,B,C,D,E), and this text file should be named with current file creation date "XYZ_CCYYMMDD.TXT" (i.e.XYZ_2011042514:33 PM).
Can anyone who has done this, please share their expertise on this... (5 Replies)
I would like to know
Is it possible to get a notification as pop-up in linux
when a folder with extension '.aqs' written
a popup should come
as " The folder has been written "
Thank you in advance (5 Replies)
I need to get notification via email when the line containing a pattern is changed in a file. Not during the time any changes to file occurs. Ie if we reset a user password say example, demouser the hash in the line containing the word demouser in the file /etc/group changes. So when this change... (1 Reply)
hi,
I want to the AIX to check if file exist everyday and send me notification email.
I added this to the root file in /var/spool/cron/crontabs
0 10 * * * /usr/sendS40No.sh > /dev/null 2>&1
I tried also
0 10 * * * /usr/sendS40No.sh
and in the sendS40No.sh i wrote this
if
then
echo... (6 Replies)
Can someone help me with a shell script that will send an email to a set of email ids when a user id is created or deleted on AIX system.
Also, if the script can let the admin know when a particular user id's password will expire. (2 Replies)
Can someone help me with a shell script that will send an email to a set of email ids when a user id is created or deleted on AIX system.
Also, if the script can let the admin know when a particular user id's password will expire. (4 Replies)
Hello Folks,
I have an requirement, where i need to get total count of the file based on creation date with there filename selected pattern.
Filename: MobileProtocol.20171228T154200.157115.udr
I want to get the count of files created on each day based on a pattern find.
find . -type... (7 Replies)
Discussion started by: sadique.manzar
7 Replies
LEARN ABOUT OSF1
mq_notify
mq_notify(3) Library Functions Manual mq_notify(3)NAME
mq_notify - Attaches a request for asynchronous signal notification to a message queue (P1003.1b)
LIBRARY
Realtime Library (librt.so, librt.a)
SYNOPSIS
#include <mqueue.h>
int mq_notify (
mqd_t mqdes,
const struct sigevent *notification);
PARAMETERS
mqdes Specifies a message queue descriptor.
*notification Specifies a signal to be sent when the specified queue accepts a message. If the notification argument is NULL, and the
process has previously attached a notification request to the message queue with this mqdes argument, the notification
request is detached and the queue is available for another process to attach a notification request.
DESCRIPTION
The mq_notify function attaches a request for asynchronous signal notification to a message queue for the calling process. Following a
call to this function, the specified signal is sent to the calling process when the queue transitions from empty to non-empty. Two or more
processes cannot attach notification requests to the same queue at the same time.
If a process has attached a notification request and any process is blocked in the execution of the mq_receive function waiting to receive
a message when a message arrives at the queue, then the appropriate mq_receive function is completed and the notification remains pending.
When the notification has been sent, the registration is canceled. In effect, it is a one-shot notification and must be re-registered if
required.
Note that the POSIX IPC functions are not reentrant with respect to signals. For example, if your application were to use a signal to
notify it that a queue has become non-empty and then attempt to call mq_receive from the signal handler, the signal handler must reside in
a thread other than the tread that called mq_send. Otherwise, a deadlock on internal locks would occur.
RETURN VALUES
On successful completion, the function returns the value 0 (zero); otherwise, the function returns the value -1 and sets errno to indicate
the error.
ERRORS
The mq_notify function fails under the following conditions:
[EBADF] The mqdes argument is not a valid message queue descriptor.
[EBUSY] A process has already attached to this message queue for asynchronous notification, or the calling process attempted to can-
cel a request that was attached by another process.
[EINVAL] The requested signo is invalid, or the sigev_notify field of the notification structure does not equal SIGEV_SIGNAL.
RELATED INFORMATION
Functions: mq_open(3), mq_send(3)
Guide to Realtime Programming delim off
mq_notify(3)