execline
Software
skarnet.org

The << program

<< runs a command with a certain string fed to a file descriptor.

Interface

     << [ -d ] fd string prog...

• << execs into prog... with string available on the fd file descriptor.
• string must not contain a null character.

Options

• -d : run the process feeding string to fd as a grandchild of <<. This is meant to prevent a zombie from hanging around if prog... has read string and fails to wait for its children.

Notes

• << is meant to be used in place of the shell << construct, which includes here-documents into scripts.