I want to write a function
whenever I call it must be make a sound alert
is it possible in Lua ?
This should be your solution:
os.execute("echo \7")
or
os.execute("echo \a")
This creates a short beep (using the speaker, not the beeper).
** Tested on Windows. But should work in UNIX also.
Related
I'm running a bash script that will play a video with mplayer depending on an input from an Arduino (on/off).
When the movie ends, I need to get a timestamp in a txt file. First question is whether there's a command in mplayer slave mode to tell me that, so I can output a timestamp easily.
If not, here's my strategy so far:
I'm running mplayer in slave mode with a fifo, where I echo "pause", whenever I want it to stop.
So, I've been doing this: echo "get_time_pos" to my fifo, which will tell mplayer to show in my Terminal the current position in the movie in seconds. When I say in my Terminal, it's in the same window where I'm running my script.
Now, I need to store this value in a variable to be able to compare with the total length and then output time.
I'm stuck at getting this output into a variable in my bash script.
I recently put together a small bash library that may grow with time. At the moment, it has the functionality you're looking for. I'll explain how to get the info you seek and then point you to my library which simplifies the task.
To get the information you seek, you don't even need to call get_time_pos. You can simply dump the mplayer (not running in quiet mode) output to a file and search that for the last timestamp. The trick here is that the timestamps listed in the dump may not be intuitive to search because of some special characters that control how text is displayed. You have to replace some of these special characters with new lines so that you can easily search it. Then you have to grab the last two lines in case the last line is not a timestamp.
Using my bash library:
Now, if you would like to simplify this process, check out this little library I wrote. Follow the usage directions on my GitHub to incorporate it, and then when you play a media file, play it with the playMediaFile function. If you do this, you'll be able to call the getElapsedSeconds or getElapsedTimestamp function to retrieve the current playback position or the playback position after mplayer has stopped. Storing it to a variable from within bash would be as simple as:
pos=$(getElapsedSeconds)
or
pos=$(getElapsedTimestamp)
This library contains other functions as well. The isFinishedPlaying function may or may not also be of use to you.
I want to have some utility that check my console output, and in case of some text match like "ERROR" make a beep or other type of event. Can somebody help me to find some?
Here's what I would do:
Redirect your output to a file.
Run a diff on that file versus the "truth data". See here on how to use diff in an if statement: Bash: using the result of a diff in a if statement
If diff returns nothing, play a sound. Details for sound playing can be found here: https://unix.stackexchange.com/questions/8607/how-can-i-play-a-sound-when-script-execution-is-ready
Good luck!
Go one step further and make a monitoring utility that will email you after an error. Your email program will have a lot of beeps and popups for alerts.
I am trying out the eGalax touch screen driver for my touch screen, as an alternative to the evdev/xinput_calibrator combination.
The calibration tool that comes with the eGalax driver, TKCal, takes the device to which the touch screen is connected as a command line argument.
Now I would like to start the calibration tool from a bash script. Is there some smart way to determine the device within the script, instead of hard coding "/dev/hidraw0" as in this example:
TKCal /dev/hidraw0 Cal
I presume that I can't rely on the touch screen landing on hidraw0 every time, can I? If I run my software on a different system, with a mouse and a keyboard and touch screen, I guess I have to handle that the devices can be conneted to different hdrawX devices. Please correct me if I am wrong.
Thank you very much!
/Fredrik Israelsson
Try looking at /sys/class/hidraw/hidraw*/device/uevent.
The guys developing the eGalax drive told be to try a much simpler solution:
Write a udev rule that will map the touch screen to a device name of my choice.
Does anyone know if there is a reader (text-to-speech) tool for cygwin or linux? I know of Microsoft's narrator, which partially works by sounding out what I type in the cygwin window (bash command line) but it doesn't report anything written to stdout.
Is there a native Cygwin tool anyone knows of?
BRLTTY, which is available through Cygwin's setup.exe, apparently does have some speech support in addition to being able to drive Braille displays. I've got no experience with it though.
BRLTTY seems to be just an interface for Braile displays - I couldn't make it "talk".
Instead get festival binary from bottom of here, put it in C:/festival, and in cygwin
echo "hello world" | /cygdrive/c/festival/bin/festival.exe --tts
should say hello world. Then I put it into a script say.sh and calling
~/say.sh hi
actually does what you'd expect :)
How to make a Linux program in the Command Line Interface who display a nice user interface?
For example when I use "wget" to download a file from internet, I can see the download advancement in the Command Line Interface. How can I do that?
ncurses is a popular option, there are APIs for lots of programming languages.
Take a look at curses. It is a library for text based UI.
You can get a basic interface by using \r to go to the beginning of the current line.
Slightly more advanced is ncurses.
The next step up is Newt.
If you want to do a GUI for Bash scripts or to wrap around other command line utilities, you can use dialog (man page).
Here two great dialog tutorial to get you started :
Dialog: An Introductory Tutorial
Improve Bash Shell Scripts Using Dialog.
If you only need a progress bar, this can be done directly with a simple print (that prints the bar), followed by the carriage return character (ANSI character #13), which puts you back at the beginning of the line. The line can then be later updated by printing over it.
For more complicated needs, ncurses is indeed the standard way to go.
I wouldn't call wget's progress report as a 'nice gui', but anyway, the classic library for building graphical interfaces without X Windows is Linux and UNIX systems is ncurses.
Recently a C# version of ncurses has been started, check out details here
If you're using Mono, you could use MonoCurses
Try curses, it is a well documented API for text based UI.Also, there is so much open source projects that are using curses for you see and learn
wget does not really have a GUI, all I see is stuff that you can already achieve using stdout and echos (e.g. printf() or std::cout)
Anyways, for simple dialog boxes of the MessageBox kind, but not limited to that, also have a look at dialog
http://linux.die.net/man/1/dialog
http://hightek.org/dialog/
You can just use ANSI escape codes. A simple example in bash
echo -e "\033[H\033[2J \033[20;20H \033[4mThis is a underlined line.\033[0m"
One should mention FTXUI. Functional Terminal (X) User interface: A simple C++ library for terminal-based user interfaces!
Cross-Platform
Support for UTF8 and fullwidth chars (→ 测试)
No dependencies
etc