execline
Software
skarnet.org
 The heredoc program 
heredoc runs a command with a certain string fed to a
file descriptor.
 Interface 
     heredoc [ -d ] fd string prog...
 -  heredoc 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 heredoc. This is meant to prevent a zombie
from hanging around if prog... has read string and fails
to wait for its children.
 Notes 
 -  heredoc is meant to be used in place of the shell
<< construct, which includes here-documents
into scripts.