ALARM(2) Linux Programmer's Manual ALARM(2)NAME
alarm - set an alarm clock for delivery of a signal
SYNOPSIS
#include <unistd.h>
unsigned int alarm(unsigned int seconds);
DESCRIPTION
alarm() arranges for a SIGALRM signal to be delivered to the calling process in seconds seconds.
If seconds is zero, no new alarm() is scheduled.
In any event any previously set alarm() is canceled.
RETURN VALUE
alarm() returns the number of seconds remaining until any previously scheduled alarm was due to be delivered, or zero if there was no pre-
viously scheduled alarm.
CONFORMING TO
SVr4, POSIX.1-2001, 4.3BSD.
NOTES
alarm() and setitimer(2) share the same timer; calls to one will interfere with use of the other.
sleep(3) may be implemented using SIGALRM; mixing calls to alarm() and sleep(3) is a bad idea.
Scheduling delays can, as ever, cause the execution of the process to be delayed by an arbitrary amount of time.
SEE ALSO gettimeofday(2), pause(2), select(2), setitimer(2), sigaction(2), signal(2), sleep(3), time(7)COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2008-06-12 ALARM(2)
Check Out this Related Man Page
ALARM(2) Linux Programmer's Manual ALARM(2)NAME
alarm - set an alarm clock for delivery of a signal
SYNOPSIS
#include <unistd.h>
unsigned int alarm(unsigned int seconds);
DESCRIPTION
alarm() arranges for a SIGALRM signal to be delivered to the calling process in seconds seconds.
If seconds is zero, any pending alarm is canceled.
In any event any previously set alarm() is canceled.
RETURN VALUE
alarm() returns the number of seconds remaining until any previously scheduled alarm was due to be delivered, or zero if there was no pre-
viously scheduled alarm.
CONFORMING TO
SVr4, POSIX.1-2001, 4.3BSD.
NOTES
alarm() and setitimer(2) share the same timer; calls to one will interfere with use of the other.
sleep(3) may be implemented using SIGALRM; mixing calls to alarm() and sleep(3) is a bad idea.
Scheduling delays can, as ever, cause the execution of the process to be delayed by an arbitrary amount of time.
SEE ALSO gettimeofday(2), pause(2), select(2), setitimer(2), sigaction(2), signal(2), sleep(3), time(7)COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2013-04-18 ALARM(2)
I have a Solaris 2.6 machine and I execute the following:
while
do
echo looping
sleep 15
done
I would assume the looping would be printed every 15 seconds but it doesn't. consecutive looping gets printed without a 15 second gap. Any idea what might be the reason ?
Thanks (9 Replies)
I'm trying generate an interrupt every 1 seconds using itimer and My clock is not running. This is what i did :
printf("about to sleep for 1 second \n");
signal(SIGALRM, wakeup);
//myTimer.it_interval.tv_sec=0;
//myTimer.it_interval.tv_usec =0;
... (5 Replies)
I am trying to write a signal to exit when a process times out. What I have come up with from poking around the web is this.
#!/usr/bin/perl
eval {
local $SIG{ALRM} = sub { die "alarm clock restart" };
alarm 10;
open(DSMADMC, "dsmadmc -se=tsmpc1 -id=XXXXX... (2 Replies)
I am trying to write a program that will;
1) Show the message "Snoozing now...zzzz" on the screen for 5 seconds
2) Then in the same position show the message "The ALARM is going off now!" for 5 seconds
3) Repeat 1) then 2) infinitely until user presses Ctrl C
I can't make it work. Any hints... (17 Replies)
I have a raw data with some formats:
* 11 REPT:CELL 55 ASSEMBLAGE 1 ALARM SCANNING
SCAN POINT: ALARM GROUP 2, ALARM ID 11
ALARM: RECTIFIER MINOR ALARM
STATE: OFF NORMAL
11 REPT:CELL 55 ASSEMBLAGE 1 ALARM SCANNING
SCAN POINT: ALARM GROUP 2, ALARM ID 11
ALARM:... (3 Replies)
Dear,
I have a alarm text file, containing minor and major alarms, i am intrested in Mojor alarm with its alarm header and next four lines in seperate file....
Can anybody help me with this below is the alarm file output.
:SEV="MAJOR":
Object-Instance %
unit-type % bts nbr % 25
... (5 Replies)
Dear Sirs,
I want to write a script as an automatic action when I receive an alarm from a specific application.
There are some variables attached to this alarm, one of them is an (ID) that represents some data.
Example:
ID Responder COS
5 6OCT2-R50C-GZ-EG Default... (2 Replies)
hi programmers from all over the world,
i am programming a simple program and want to deal with signals.
i want to understand and work with the old signal-concept under unix,
but i have a problem, hope you can help or knoew where i can get help.
i use just one sig-handler, if a signal is... (1 Reply)
Hi members, I am working in WebSphere in Unix environment. we are working with 500 odd servers and most of the times processes got down. Can i have any shell script through whih some popup with alarm get raised whenever some server get down. kindly help.. Thanks Rishi (1 Reply)
Please Help me
Question: - we manually moving/removing old files, when we are getting alarm as /dir1/dir2 size greater than 90%.
we manually moving/removing old files and reduce the file size to less than 90%
- I want to delete all 2months before old files once we get the thresh hold >= 90%... (3 Replies)
I'm trying to run a alarm.sh using crontab, which play a song as
an alarm at 6.15 am. I'm using amixer so that volume increases by 10% in every loop.
My script is the following.
SHELL=/bin/bash
PLAYER=/usr/bin/mplayer
SONG=/home/hbar/Music/song.mp3
DISPLAY=:0.0
15 06 * * *... (10 Replies)
Hi Unix Gurus,
I have a long text file, where alarms events are logged and alarm clear event are logged.
Both events alarm and alarm clear has common identifier as{xxxxxxxxxx}
I need to analyse the time-period for which the alarm sustained.
i.e
Output: timestamp from both event has... (3 Replies)
Hi friends,
I have one unix command which is used to check the network status manually.
followig is the command
check_Network this command give follwoing status
Network 1 is ok
Network 2 is ok
network 3 is ok
network 4 is ok
.
.
.
.
Network 10 is... (8 Replies)
Hi,
I need to create a monitoring alarm script which would check if the log file has been updated in the last one hour or not.
I tried using -cmin however, one environment supports it where as the other does not.
I would really need some help here!!! (2 Replies)