Linux man pages : pipe (2)
PIPE(2) Linux Programmer's Manual PIPE(2)
pipe - create pipe
int pipe(int filedes);
pipe creates a pair of file descriptors, pointing to a pipe inode, and
places them in the array pointed to by filedes. filedes is for
reading, filedes is for writing.
On success, zero is returned. On error, -1 is returned, and errno is
EMFILE Too many file descriptors are in use by the process.
ENFILE The system file table is full.
EFAULT filedes is not valid.
SVr4, SVID, AT&T, POSIX, X/OPEN, BSD 4.3
read(2), write(2), fork(2), socketpair(2)
Linux 0.99.11 1993-07-23 PIPE(2)