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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2018-07-08 10:57:27 +0200 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2018-07-08 10:57:27 +0200 |
| commit | 13600496d347ec95a1afe67bd67530ff74563316 (patch) | |
| tree | 590c97a4b61eb38e6f7dfaa75499a1b8aef6ae24 /man7/unix.7 | |
| parent | 8bdcf4bf818acfb609be7004c80173199a9e35c0 (diff) | |
| download | man-pages-13600496d347ec95a1afe67bd67530ff74563316.tar.gz | |
unix.7: Enhance the description of SCM_RIGHTS
The existing description is rather thin. More can be said.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Diffstat (limited to 'man7/unix.7')
| -rw-r--r-- | man7/unix.7 | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/man7/unix.7 b/man7/unix.7 index 46b1914b84..0850ebc1be 100644 --- a/man7/unix.7 +++ b/man7/unix.7 @@ -369,8 +369,16 @@ For more information see .B SCM_RIGHTS Send or receive a set of open file descriptors from another process. The data portion contains an integer array of the file descriptors. -The passed file descriptors behave as though they have been created with -.BR dup (2). +Commonly, this operation is referred to as "passing a file descriptor" +to another process. +However, more accurately, +what is being passed is a reference to an open file description (see +.BR open (2)), +and in the receiving process it is likely that a different +file descriptor number will be used. +Semantically, this operation is equivalent to duplicating +.RB ( dup (2)) +a file descriptor into the file descriptor table of another process. .IP The kernel constant .BR SCM_MAX_FD |