execline
Software
skarnet.org

The withstdinas program

withstdinas reads the entirety of its standard input in an environment variable, and runs another program with that additional environment variable.

Interface

In an execlineb script:

     withstdinas [ -i | -D default ] [ -n ] variable prog...

• withstdinas reads its stdin until EOF.
• It then execs into prog..., with variable added to the environment; the value of variable is what was read on stdin.

Options

• -i : insist. If the data on stdin is invalid as an environment variable, for instance if it contains a null character, withstdinas exits 1.
• -D default : default value. If the data on stdin is invalid, default is used as variable's value. If neither the -i nor the -D option have been given, withstdinas execs into prog... with variable containing whatever value could be read on stdin, cut before the first null character.
• -n : chomp an ending newline off stdin.

Notes

• You can start prog... with "import -u variable" to perform variable substitution.