crontab+mplayer alarm clock Post: 302682229

Sponsored Content

Top Forums Shell Programming and Scripting crontab+mplayer alarm clock Post 302682229 by hbar on Sunday 5th of August 2012 10:32:21 PM

08-05-2012

Registered User

Quote:

Originally Posted by agama

The way you have your command written, I wouldn't expect the volume to increase. The mixer command is invoked once, and if successful (&&) mplayer is invoked to play the mp3 looping through it 5 times.

If you want to bump the volume with each cycle through the file I would write a small script (alarm.bash or somesuch) and invoke that from cron. The script would look something like this:

Code:

#!/usr/bin/env bash
PLAYER=/usr/bin/mplayer
SONG=/home/hbar/Music/song.mp3

/usr/bin/amixer sset Master 35% >/dev/null 2>&1  # start with a default volume maybe??

for (( i = 0; i < 5; i++ ))
do
   /usr/bin/amixer sset Master 10%+ >/dev/null 2>&1
   $PLAYER -really-quiet -vo null $SONG >/dev/null 2>&1
done

In addition to Carona's suggestion, I'd toss in -really-quiet to cut the overhead of updates directed to /dev/null.

Are you meaning to execute from /etc/crontab? Can't I do it by

crontab <filename>.bash

?

hbar

View Public Profile for hbar

Find all posts by hbar

3 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

alarm

Hello I have a server HP ES40 with unix 5.1B, and if i open from Start-Programs-IN Tools-GUI/pfmalarm/Alarm-start monitoring , I receive this error message "IOR : STRING IS TOO LONG ! MAXIMUM SIZE = 1024" Anybody heard about this error? Thanks Alin

2. Shell Programming and Scripting

Scripting an alarm

Hi All, I am monitoring batch Processes running in UNIX environment. I use PuTTy to monitor the process running. I have to continuously monitor and look on the screen if some error has come or not. If an error comes FAILURE word is displayed instead of SUCCESS as shown below on the...

3. Shell Programming and Scripting

Alarm clock error while executing the script

I am executing perl script on Linux machine and the script is running for the last 5 hours and while running the script I had an error message in a single line Alarm Clock and the script got stopped. I havnt scheduled the script.I have executed the script manually. There is no syntax errors in...

LEARN ABOUT MOJAVE

alarm

ALARM(3)						   BSD Library Functions Manual 						  ALARM(3)

NAME

     alarm -- set signal timer alarm

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     unsigned
     alarm(unsigned seconds);

DESCRIPTION

     This interface is made obsolete by setitimer(2).

     The alarm() function sets a timer to deliver the signal SIGALRM to the calling process after the specified number of seconds.  If an alarm
     has already been set with alarm() but has not been delivered, another call to alarm() will supersede the prior call.  The request alarm(0)
     voids the current alarm and the signal SIGALRM will not be delivered.

     Due to setitimer(2) restriction the maximum number of seconds allowed is 100000000.

RETURN VALUES

     The return value of alarm() is the amount of time left on the timer from a previous call to alarm().  If no alarm is currently set, the
     return value is 0.

SEE ALSO

     setitimer(2), sigaction(2), sigpause(2), sigvec(2), signal(3), sleep(3), ualarm(3), usleep(3)

HISTORY

     An alarm() function appeared in Version 7 AT&T UNIX.

BSD
								  April 19, 1994							       BSD

3 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

alarm

Discussion started by: tomaalin

2. Shell Programming and Scripting

Scripting an alarm

Discussion started by: sampandey31

3. Shell Programming and Scripting

Alarm clock error while executing the script

Discussion started by: scriptscript

LEARN ABOUT MOJAVE

alarm