Programming :: Make A Flawless Bash Alarm Script
Jan 12, 2011
I am not positive that this is the right subforum for this post. It is technically a programming question but I am not sure if this is the best place for bash scripting questions. Anyhow, I have been having trouble getting up in the morning. I am a pretty good morning person and once I am up, I am good to go. The problem is getting out of bed. Traditional alarms have just not cut it in the past; there is always an easy way to shut them off and go back to sleep.
Recentliesh, I decided to try to make an alarm script in bash that would be more successful in getting my lazy behind out of bed. I am a newbie bash scripter at best so my attempts have been very simple but have not cut it so far. Here are some examples:
[Code]....
The above script was the version of my bash alarm. It will not stop ringing until I input that ridiculous phrase. The big issue with this script was that I would input the phrase quickly and go back to sleep. It was however, much more successful than traditional alarm clocks. Another obvious pitfall was that even though control-c'ing the process would not work, the terminal could be closed and that would be the end of it. I'll get back to that issue. Here is my second attempt:
[Code]....
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Feb 21, 2010
I'm trying to make an "alarm clock" with mpd and gxmessage. Gxmessage allows you to assign unique exit codes for its buttons to use in your script. This is what I have so far:
Code:
#!/bin/bash
vol=$1
mpc clear
mpc load alarm
[Code].....
Now I know I'm way off with the case statement, because when the alarm_message function is called within the case, both of the exit codes I assigned to the buttons (-buttons "Stop":1,"Sleep":2 ) return to their default value.
What I would like is for every time the "Sleep" button is pressed, it would pause mpc, sleep for an amount of time, play, then open gxmessage again to restart the case statement (retaining the exit codes I assigned to the buttons). Am I on the right track?
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Jun 13, 2011
So, I'm attempting to write an alarm clock from scratch without a GUI, doing this through a bash script. So far I wrote the file that actually initiates the song, and I was trying to set up a crontab so I could do it at a certain time, making it function like an alarm clock, but it isn't seeming to work, any input on why
Code:
SHELL=/bin/bash
12 5 * * * /home/angelo/music.sh
That is my crontab
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Apr 18, 2009
I have a program I am writing where I have a for loop and I want to make it substitute the variable twice like:
for ((i=0;i<5;i++)) do
echo $"$i"
done
[code]...
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Jul 7, 2011
I live in a crowded area so I have to use headphones almost all of the time. I just leave them plugged in so when an alarm goes off from Thunderbird or Evolution, I can't hear it. Is there a way to get some use out of my internal system speaker and have a reliable calendar-event-reminder and alarm? I'm talking about the one that will beep from inside the computer even if you have headphones plugged in.
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Apr 14, 2010
I'm trying to make a automated build-script with bash but i keep getting different errors that I can't seem to figure out. Could anyone please tell me what's wrong with this package of build-scripts? I'm posting the main build-script and attaching the rest of the scripts in a compressed form. The errors mainly comes from the scripts in "/first_installation/usr/share/siem-live/init"
[Code]...
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Jan 14, 2011
How can I iterate over all the files in the current directory to check for certain permissions? This is what I have:
Code: #!/bin/bash
for file in *.tar.gz
do if [ -r "$file" ]
then echo "$file is readable"
else echo "$file is NOT readable"
fi done
But this only checks that the current user has read permissions for each file. I want to check that the group "others" has read permissions for each file. How can I do this? Is there a built in function to check if a file has read permissions for the "others" group? Otherwise, I thought I might be able to use this:
Code: $ stat --format=%a file
744 And parse the output "744" and make sure the 3rd number is between 4 and 7 (since the octals 4-7 have read permissions for others).
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May 3, 2011
I am relatively new to scripting, but I was wanting to open a firefox window from a bash script, but have it open, then minimize. In the script, I have a single instance of: firefox & but is there a way to minimize it, versus have it displayed on the screen? I was wanting the command terminal to remain visible and it can't since the firefox window is open in front of it. I looked all over the place, including the man pages, but to no avail. I can make the height and width changes, but no minimize. Either that, or to be able to bring the terminal window back to the front automatically.
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Apr 14, 2010
I'm trying to make a automated build-script with bash but I keep getting different errors that I cant't seem to solve for various reasons. what's wrong with this build-script? I'm posing the main build-script and attaching the rest of the scripts in a compressed form. Buld-script link: [URL]
[Code]....
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Aug 31, 2010
This is what I have:
Code:
#!/bin/bash
#ascript.sh
[code]...
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Jun 23, 2010
I'm planing to write a bash script that will make some web stats reports and I'm stuck on beginning because I don't know how can I read a directory content, put everything in a variable, compare the variable value with current date and go further.More specific ...
I have /var/apache/log/. Here I have access logs on date ( like access.log.24.06.2010.gz and so on ).
How can I do to automatically zgrep (in a bash script) last day .gz ??
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Mar 22, 2011
I have not been able to write bash to use a PID file to ensure no other instance of the same script is running! All three methods I can think of to see if the PID in the PID file is another instance of the script make the script exit with a return code of 1 but the same commands run at the command prompt work as expected.
The first attempt was:
Code:
The first attempted workaround was:
Code:
The second attempted workaround (with debug to make the following command prompt copy and paste meaningful) was:
Code:
Here's the command prompt session, testing with a stale PID file and then manually running the problem command and it behaving as expected:
Code:
This on Slackware64 13.1 which has bash 4.1.7.
In desperation I tried rebooting but the behaviour was the same.
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Apr 14, 2009
I'm starting to like making bash scripts. It's kewl making creative ones. Right now I'm trying to make a bash script that will open up port 23 for a netcat connection. Once there's a connection, I'd like for the script to open up xmms and play a sound effect, as well as echo a txt file to the desktop saying that a connection was made at this specific time. When I execute the script, it stops exection at the first line. So far I have this:
sudo nc -lvnp 23
while [ 1 ]
do
[code]...
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Apr 4, 2009
ia have this script
#!/bin/bash
if [ -e /tmp/mysql.pipe ]; then
[code]...
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Jan 15, 2010
I am working in Linux and have connected a normal LED to my serial port (with voltage conversion). I am just trying to make that LED blink periodically using alarm ().So in the signal handling routine of my code,i toggle the LED but then the program quits as SIGALRM terminates the process. Shall i make a nested alarm so that the handling routine also has an alram()? I am stuck and i must confess that i am not so convenient with signal handling so can someone provide some pointers?I thought about using sleep(); but the advantage with alarm is that it waits for the exact number of seconds (when the second turn over from previous to new value) before raising the alarm while i am not sure about sleep taht does that or not.
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Oct 21, 2010
I am trying to write a bash script that will extract a .cbr (.rar) file, traverse the extracted files in alphabetical order and rename them 001.JPG, 002.JPG, 003.JPG, etc.So far I only have this much to extract it:
Code:
#!/bin/bash
#
[code]....
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Jun 27, 2011
I have a set of bash scripts that I'm running that automatically build a set of packages for me and redirect their output into logs. Basically, I have a bunch of lines that are something like this: ${CONFIGURE_DIR}/configure &> ${LOG_DIR}/log or cd ${CONFIGURE_DIR} && make &> ${LOG_DIR}/log, etc.
This is supposed to make the entire process silent. However, sometimes with some packages some output leaks to my console (either stdout or stderr). I'm thinking that maybe the configure scripts/make are executing commands within new shell instances that don't inherit my redirect, or something to that effect.
Another reason for thinking this is that in another part of my script I detect errors when running make by testing with "if [ $? -ne 0 ]", and if the redirect leaks to my console and also the leaked output indicates that the build failed ("make: Error" and so on), then my $? test fails (i.e., it thinks that $? == 0, whereas a failed make should return a non-zero value). It's as if my original script can't "see" the results from child commands executed from later scripts.
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May 2, 2010
My Toshiba NB100 originally came pre-installed with 8.04 LTS and even has a 'Ubuntu Certified' case sticker, so I expected that jumping to the next LTS should be easy... It was. Simply burnt the image to a thumb drive, booted into the live mode, saw that everything worked and installed it. Everything that worked in 8.04 works here. Not a single problem!
Of course, you have to do a clean install though because the 8.04 supplied by Toshiba is disabled to only allow updates for 8.04 but not to upgrade. I did not need to install any 'Payson' packages and the once proprietary wireless driver is now not, so I have a totally non-proprietary system.
As well as looking nicer and booting faster there are other pluses. I can now upgrade in future without a clean install (if I want) and hopefully no longer have to put up with updates breaking the system - for example sound disappeared on two 8.04 updates (a finding found by many NB100-11R users) and the last update which pushed me to try 10.04 ASAP also made my webcam undetectable and the keyboard mapping all wrong. No such problems here now and I don't expect it.
So, if you have Toshiba-NB100-11R, there is absolutely nothing to lose. Backup your valued files and go for it. Totally painless. Of course you'll need add all the restricted stuff back yourself, but that's not hard. EDIT: Only one thing doesn't work (that doesn't bother me): the function key to toggle wireless on and off. It always remains on.
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Feb 4, 2011
I would like to know how do I print the line # in a script. My requirement is, I have a script which is about ~5000 lines long. If there are any errors happen I just exit. And I would like to add the line # of the script where the error happened.
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Jan 24, 2010
simple bash code:
Code:
#!/bin/bash
trap "echo 'you got me'" SIGINT SIGTERM # to trap ctrl+c
echo "Press ctrl+c during 5 sec loop"
for ((i=0;i<5;i++)); do
[Code]...
How come code behaves normally and stops when ctrl+c signal is caught and resumes, but after I use at least one timeout read in the code it looks like, if signal is caught again it doesn't pause the execution but skips the loop. If you remove -t (timeout) option from the read, both loops look the same!
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Nov 26, 2008
I have a config file that contains:
my.config:
Code:
Now in my bash script, I want to get the output /home/user instead of $HOME once read. So far, I have managed to get the $HOME variable but I can't get it to echo the variable. All I get is the output $HOME.
Here is my parse_cmd script:
Code:
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Jul 25, 2011
I have written quite a few separate bash & scripts and php scripts that up to now I have run from cron jobs. However I have to estimate how long each takes to run, before running the next and so it probably takes much longer than necessary to run them all. They have to run in order.
Now there are so many I am thinking it would be better to have a master bash script that would run one after the other, but I am not sure how to get the master script to wait before starting to run the next script. Is this possible and is there a command that will make the script wait between bash and php scripts , for them to finish, before running the next?
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Jan 9, 2010
I would like to get the filename (without extension) and the extension separately. The best solution I found so far is:
Let FILE="thefilenameofsomefilesfor_instance.txt"
Code:
NAME=`echo "$FILE" | cut -d'.' -f1`
EXTENSION=`echo "$FILE" | cut -d'.' -f2`
I think it would be better to count the len and remove 3 chars to right to get the extension, but it can be macintosh filenames with have 4 chars for extensions.
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Sep 15, 2010
I want to gave much details as possible. working directory (~/a1/shell) in the shell directory i have Makefile. also in the shell directory i have subdirectory's (obj, src, include)
My current Makefile
Quote:
#What needs to be built to make all files and dependencies
clean:
# End of Makefile
I wanted it so: all .o files are created in the obj subdirectory, and my application, sshell, is created in the shell directory.
I am getting this error when i run the make run: No rule to make target 'shell.h', needed by 'shutil.o'. stop
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Mar 31, 2011
I need to rename the resulted searched files from a loopI have the following code:
find . -name DOC* | while read i
do
find $i -type f -name '*.txt'
done
basically, I am searching for all txt files inside any folder starting with DOC name.this code is working fine with me.I need to rename those .txt files to .txtOLDOS: Ubuntu 10.4Bash shell
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May 1, 2011
bash: how do you make the construct ${var%% *} work? I am trying to select the first word from a variable which contains many space-separated words. I am running Ubuntu 10.10 with GNU bash, version 4.1.5(1)-release (x86_64-pc-linux-gnu) and when I try to use this construct, the expression returns the complete variable with no removal of trailing anything.
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Apr 16, 2010
I need to know what is the best method for teaching yourself how to make bash script files
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Apr 16, 2010
I need to know what is the best method for how to make bash script files
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Nov 21, 2010
I am attempting to learn how write bash scripts. I want one to ask for a specific key. For example, I want it to ask a question, then if it is like, y for yes, or n for no, it does a specific thing. I'm thinking it would be something like:
Code:
#!/bin/bash
echo "Are you a boy? y/n"
read -t3
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Aug 7, 2011
i've written a script that will move some files from one directory to another, i dont know if this is the right place to ask but, this is on my ipod touch and i'm wondering how to make it run periodicaly
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