04-17-2012
Count the size and send notification
Hello,
I want to do something simple,
I want to count the dir size (du -sh directoryname) and then check if
it is over 100GB.
If it is more than 100GB I want to send a notification , if it less than 100GB the script can just stop.
I know how to count with du -sh and how to send an email but I dont know how to compare with 100GB, any help?
thank you.
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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)