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Update manual page to reflect changes in rev 1.12 of

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"src/lib/libc/gen/popen.c" --- popen() in the child
now closes any copies of popen()'ed descriptors in the parent.
This commit is contained in:
Joseph Koshy 1998-11-06 07:09:22 +00:00
parent 11adc0d65e
commit 41a3e3b022
1 changed files with 6 additions and 3 deletions
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9
lib/libc/gen/popen.3
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@ -53,16 +53,19 @@ function
a process by creating a bidirectional pipe
forking,
and invoking the shell.
Any streams opened by previous
.Fn popen
calls in the parent process are closed in the new child process.
Historically,
.Nm popen
.Fn popen
was implemented with a unidirectional pipe;
hence many implementations of
.Nm popen
.Fn popen
only allow the
.Fa type
argument to specify reading or writing, not both.
Since
.Nm popen
.Nm
is now implemented using a bidirectional pipe, the
.Fa type
argument may request a bidirectional data flow.