returncode of command in a pipline
80410
Get exit status of process that's piped to another
113977
Unix command that immediately returns a particular return code?
134147
Can I get the output of a command line program with TeX (using e.g. \read18)?
53955
Get exit code of a background process
61978
Getting STDOUT, STDERR, and response code from external *nix command in perl
31629
How to call an external program in python and retrieve the output and return code?
7206
Defining a new command for making functional lines / package
123558
Creating a package of custom-made commands
26675
Can I tell the compiler to consider a control path closed with regards to return value?
16411
Piping for loop output prevents local variable modification
66271
Where has the trailing newline char gone from my command substitution?
130505
some \newcommand instructions not working
134393
Evaluating the return value of a command line
113995
How do I retrieve only the needed line from terminal output?
68237
Algoritmic return command = 0
10901
How to send stderr to stdout with a pipe to another command?
99250
How do I read the source code of shell commands?