24 .fi
  25 
  26 .SH DESCRIPTION
  27 .sp
  28 .LP
  29 The \fBpipe()\fR and pipe2() functions create an I/O mechanism called a
  30 pipe and returns two file descriptors, \fIfildes\fR[\fB0\fR] and
  31 \fIfildes\fR[\fB1\fR]. The files associated with \fIfildes\fR[\fB0\fR]
  32 and \fIfildes\fR[\fB1\fR] are streams and are both opened for reading and
  33 writing.  The \fBpipe()\fR call will clear the \fBO_NDELAY\fR,
  34 \fBO_NONBLOCK\fR, and \fBFD_CLOEXEC\fR flags on both file descriptors. The
  35 \fBfcntl\fR(2) function can be used to set these flags.
  36 .sp
  37 .LP
  38 The \fBpipe2()\fR call will clear the \fBO_NDELAY\fR on both filedescriptors.
  39 The \fIflags\fR argument may be used to specify attributes on both file
  40 descriptors.  \fBpipe2()\fR called with a \fIflags\fR value of 0 will
  41 behave identically to \fBpipe()\fR.  Values for \fIflags\fR are constructed
  42 by a bitwise-inclusive-OR of flags from the following list, defined in
  43 <\fBfcntl.h\fR>.
  44 .RE
  45 
  46 .sp
  47 .ne 2
  48 .na
  49 \fB\fBO_NONBLOCK\fR\fR
  50 .ad
  51 .RS 12n
  52 Both file descriptors will be placed in non-blocking mode. This corresponds
  53 to the \fBO_NONBLOCK\fR flag to \fBfcntl\fR(2).
  54 .RE
  55 
  56 .sp
  57 .ne 2
  58 .na
  59 \fB\fBO_CLOEXEC\fR\fR
  60 .ad
  61 .RS 12n
  62 Both file descriptors will be opened with the FD_CLOEXEC flag set. Both file
  63 descriptors will be closed prior to any future exec() calls.
  64 .RE

  24 .fi
  25 
  26 .SH DESCRIPTION
  27 .sp
  28 .LP
  29 The \fBpipe()\fR and pipe2() functions create an I/O mechanism called a
  30 pipe and returns two file descriptors, \fIfildes\fR[\fB0\fR] and
  31 \fIfildes\fR[\fB1\fR]. The files associated with \fIfildes\fR[\fB0\fR]
  32 and \fIfildes\fR[\fB1\fR] are streams and are both opened for reading and
  33 writing.  The \fBpipe()\fR call will clear the \fBO_NDELAY\fR,
  34 \fBO_NONBLOCK\fR, and \fBFD_CLOEXEC\fR flags on both file descriptors. The
  35 \fBfcntl\fR(2) function can be used to set these flags.
  36 .sp
  37 .LP
  38 The \fBpipe2()\fR call will clear the \fBO_NDELAY\fR on both filedescriptors.
  39 The \fIflags\fR argument may be used to specify attributes on both file
  40 descriptors.  \fBpipe2()\fR called with a \fIflags\fR value of 0 will
  41 behave identically to \fBpipe()\fR.  Values for \fIflags\fR are constructed
  42 by a bitwise-inclusive-OR of flags from the following list, defined in
  43 <\fBfcntl.h\fR>.

  44 
  45 .sp
  46 .ne 2
  47 .na
  48 \fB\fBO_NONBLOCK\fR\fR
  49 .ad
  50 .RS 12n
  51 Both file descriptors will be placed in non-blocking mode. This corresponds
  52 to the \fBO_NONBLOCK\fR flag to \fBfcntl\fR(2).
  53 .RE
  54 
  55 .sp
  56 .ne 2
  57 .na
  58 \fB\fBO_CLOEXEC\fR\fR
  59 .ad
  60 .RS 12n
  61 Both file descriptors will be opened with the FD_CLOEXEC flag set. Both file
  62 descriptors will be closed prior to any future exec() calls.
  63 .RE