ush

ush executes a sequence of commands similarly to the shell. Each process is forked and executed and connected using pipes. Unlike a shell, it does nothing else. This makes ush appropriate for uses where running a shell is challenging or when security is critical.

Examples

Forward log messages that match an expression in grep.

ush -o /dev/tcp/localhost/9999 nc -kl localhost \| grep ERROR

# add host names to hosts.txt
dsh -Mcf hosts.txt ush -o somefile.txt echo "some stuff"

Building and Installing

Should be just a matter of:

make # builds ush in source directory
make install # installs ush binary and man page

Setting the PREFIX variable will change the build install location. By default, this value is /usr/local:

make clean
make PREFIX=/opt/bin
make PREFIX=/opt/bin install