Is there a way to perform nonblocking I/O reads from standard input in a bash script?
For example, in C, you can say:
the 'fgetc' function will not block on standard input but will attempt to read and return ch = -1 if there was no input waiting.
Bash has the builtin "read" command, which hangs on stdin until it can read some characters (or until it times out, if you set it to read with the -t option), but there seems to be no real way to imitate the C behavior described above. Is there?
Hi all,
plz can anybody tell me that if a script written for Bash shell also work for other shells and if yes , how ???
Thanks and Regards
SONAL (2 Replies)
Hello everyone!
I'm looking for a way to build a GUI for various bash scripts I've written.
Is there any "good" way to do it?
I've heard about python/gtk+,qt and other stuff, but I've absolutely no idea where I should look at.
Thanks a lot in advance!
Regards,
xenator
EDIT:
... (1 Reply)
Hi,
I have to write a program to compute the checksums of files
./script.sh
I wrote the program using bash and it took me forever since I am a beginner but it works very well.
I'm getting so close to the deadline and I realised today that actually I have to use normal Bourne shell... (3 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Test that exactly one command line argrument is enter from the command line. If not, display the usage... (1 Reply)
Hello,
the bulk of my work is run by scripts. An example is as such:
#!/bin/bash
awk '{print first line}' Input.in > Intermediate.ter
awk '{print second line}' Input.in > Intermediate_2.ter
command Intermediate.ter Intermediate_2.ter > Output.out
It works the way I want it to, but it's not... (1 Reply)
Need some help to replace bash script with parallel to speed up job on multiple files (400files.list is the file contains the absolute path to those 400 files). The bash script is to run the same program over the files repetitively.
My bash_script.sh is:
for sample in `cat 400files.list`; do... (3 Replies)
I am currently running the following two bash scripts, in order to start x, matchbox and midori on the raspberry pi hdmi, using a remote ssh session.
start-browser
#!/bin/bash
# import variables
source /var/rpi/scripts/config/variables/general
echo "starting browser"
DISPLAY=:0.0 sudo xinit... (2 Replies)
i have to run the following script through a pipe:
script.sh:
#!/bin/bash
echo "Hello World"
echo -e "The \033
here's how its currently being run:
bash -c "$(cat script.sh)"
This is an interactive script. the problem is, when i run it this way, if you go to another terminal and... (4 Replies)
So I've written my first bash script.I wanted to run it from the command line, but I got an error:
$ myscript.sh
myscript.sh: command not found
So instead I try this and it works:
$ ./myscript.sh
Is this how I will always need to execute it? How can I run myscript.sh without having to... (2 Replies)
Discussion started by: P.K
2 Replies
LEARN ABOUT XFREE86
libbash
LIBBASH(7) libbash Manual LIBBASH(7)NAME
libbash -- A bash shared libraries package.
DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
want to load and use in scripts of your own.
It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.
Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded
using
ldbash(1) must answer 4 requirments:
1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).
2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library
exports. I.e. all the function that will be usable after loading that library will be listed in that line.
3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are
required for our library. I.e. every bash library that is in use in our bash library must be listed there.
4. The library must be listed (For more information, see ldbashconfig(8)).
Basic guidelines for writing library of your own:
1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.
2. Try to declare all variables intended for internal use as local.
3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
__<library_name>_
For example, internal function myfoosort of hashstash library should be named as
__hashstash_myfoosort
This helps to avoid conflicts in global name space when using libraries that come from different vendors.
4. See html manual for full version of this guide.
AUTHORS
Hai Zaar <haizaar@haizaar.com>
Gil Ran <ril@ran4.net>
SEE ALSO ldbash(1), ldbashconfig(8), getopts(1), hashstash(1)colors(1)messages(1)urlcoding(1)locks(1)Linux Epoch Linux