Hello,
Is there a way to perform nonblocking I/O reads from standard input in a bash script?
For example, in C, you can say:
int flags = fcntl(STDIN_FILENO, F_GETFL);
fcntl(STDIN_FILENO, F_SETFL, flags | O_NONBLOCK);
ch = fgetc(stdin);
the 'fgetc' function will not block on... (5 Replies)
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)
I am trying to have doxygen documenting my bash scripts by setting the following in my Doxyfile
FILE_PATTERNS = *.sh *.awk
INPUT_FILTER = "sed -e 's|##|//!|'"
FILTER_SOURCE_FILES = YES
# Set path to bash scripts
V=$(readlink -f"$0")
bashpath="${V%/*}"
# Set ANSI color... (0 Replies)
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)
Discussion started by: SkySmart
4 Replies
LEARN ABOUT LINUX
rbash
RBASH(1) General Commands Manual RBASH(1)NAME
rbash - restricted bash, see bash(1)RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a file name containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO bash(1)GNU Bash-4.0 2004 Apr 20 RBASH(1)