pipe - open a pair of connected filehandles |
pipe - open a pair of connected filehandles
pipe READHANDLE,WRITEHANDLE
Opens a pair of connected pipes like the corresponding system call.
Note that if you set up a loop of piped processes, deadlock can occur
unless you are very careful. In addition, note that Perl's pipes use
IO buffering, so you may need to set $|
to flush your WRITEHANDLE
after each command, depending on the application.
See the IPC::Open2 manpage, the IPC::Open3 manpage, and Bidirectional Communication in the perlipc manpage for examples of such things.
On systems that support a close-on-exec flag on files, the flag will be set for the newly opened file descriptors as determined by the value of $^F. See $^F in the perlvar manpage.
pipe - open a pair of connected filehandles |