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 SUNOS
mq_notify
mq_notify(3RT) Realtime Library Functions mq_notify(3RT)NAME
mq_notify - notify process (or thread) that a message is available on a queue
SYNOPSIS
cc [ flag... ] file... -lrt [ library... ]
#include <mqueue.h>
int mq_notify(mqd_t mqdes, const struct sigevent *notification);
DESCRIPTION
The mq_notify() function provides an asynchronous mechanism for processes to receive notice that messages are available in a message queue,
rather than synchronously blocking (waiting) in mq_receive(3RT).
If notification is not NULL, this function registers the calling process to be notified of message arrival at an empty message queue asso-
ciated with the message queue descriptor, mqdes. The notification specified by notification will be sent to the process when the message
queue transitions from empty to non-empty. At any time, only one process may be registered for notification by a specific message queue. If
the calling process or any other process has already registered for notification of message arrival at the specified message queue, subse-
quent attempts to register for that message queue will fail.
The notification argument points to a structure that defines both the signal to be generated and how the calling process will be notified
upon I/O completion. If notification->sigev_notify is SIGEV_NONE, then no signal will be posted upon I/O completion, but the error status
and the return status for the operation will be set appropriately. If notification->sigev_notify is SIGEV_SIGNAL, then the signal specified
in notification->sigev_signo will be sent to the process. If the SA_SIGINFO flag is set for that signal number, then the signal will be
queued to the process and the value specified in notification->sigev_value will be the si_value component of the generated signal (see sig-
info.h(3HEAD)).
If notification is NULL and the process is currently registered for notification by the specified message queue, the existing registration
is removed. The message queue is then available for future registration.
When the notification is sent to the registered process, its registration is removed. The message queue is then be available for registra-
tion.
If a process has registered for notification of message arrival at a message queue and some processes is blocked in mq_receive(3RT) waiting
to receive a message when a message arrives at the queue, the arriving message will be received by the appropriate mq_receive(3RT), and no
notification will be sent to the registered process. The resulting behavior is as if the message queue remains empty, and this notification
will not be sent until the next arrival of a message at this queue.
Any notification registration is removed if the calling process either closes the message queue or exits.
RETURN VALUES
Upon successful completion, mq_notify() returns 0; otherwise, it returns -1 and sets errno to indicate the error.
ERRORS
The mq_notify() function will fail if:
EBADF The mqdes argument is not a valid message queue descriptor.
EBUSY A process is already registered for notification by the message queue.
ENOSYS The mq_notify() function is not supported by the system.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mqueue.h(3HEAD), siginfo.h(3HEAD), signal.h(3HEAD), mq_close(3RT), mq_open(3RT), mq_receive(3RT), mq_send(3RT), attributes(5), standards(5)NOTES
Solaris 2.6 was the first release to support the Asynchronous Input and Output option. Prior to this release, this function always returned
-1 and set errno to ENOSYS.
SunOS 5.10 28 Jun 2002 mq_notify(3RT)