Change input stream mid-program
I have the following program which prints text from a file: #include
Tag: io-redirection
File descriptor before a command
What does this mean? to have the file descriptor before a command line utility. Example, >&2 echo “Hey there! Something failed” Afaik, it should have been at the end of a command …
Linux process misbehaving (MQTT) if redirecting output to file
I have developed Linux module that uses MQTT communication over TCP. There was no issue with the functionality until i made a script to auto start the module and redirect the stdout and stderr to a …
Program to capture other’s program stderr and stdout
I’d like to run a program as root that can intercept other’s program stderr and stdout. For example, say I start a nodejs server and somehow there’s an error (with logs printed to stderr), if my …
Redirecting standard input / output to substituted command
I am trying to run a command, which can be simplified to this structure: echo “A,B” | cp $(sed -e ‘s/A,//’) $(sed -e ‘s/,B//’) But I am struggling getting the input / output of the substituted …
Supporting both FD-number and filename parameterized redirections
I am writing a shell script that redirects the STDOUT and STDERR output of a program. The destination of the redirect is a variable. Usually, the destination is a file in which case the following …
Strange behaviour of indirection operator > in bash
I was trying to do this to dump all the output from command line to time.txt file as it is needed for my script. (time echo “hi”) > time.txt What I observed is output of time command is going to …
Very weird redirection behavior
I execute a program which print some texts. I redirect the texts to file by using > but I cannot see any texts on the file. For example, if the program prints “Hello” I can see the result on the …
save console output of programm to file – not simplte 2>&1
i want to analyze multiple mp3 files and get the bpm of the files. Therefore i’m using soundstretch. At first i’m converting the mp3 files using sox sox -t mp3 -r 44100 -c 2 file.mp3 -t wav file3….
How do I use sudo to redirect output to a location I don’t have permission to write to? [closed]
I’ve been given sudo access on one of our development RedHat linux boxes, and I seem to find myself quite often needing to redirect output to a location I don’t normally have write access to. The …