New: flock: can return EAGAIN contrary to manpage
https://bugzilla.kernel.org/show_bug.cgi?id=29362
Summary: flock: can return EAGAIN contrary to manpage
Product: Documentation
Version: unspecified
Kernel Version: n/a
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: low
Priority: P1
Component: man-pages
AssignedTo: documentation_man-pages-ztI5WcYan/[email protected]
ReportedBy: [email protected]
Regression: No
flock(2) manpage does not list EAGAIN as possible return value. As far as I understand, one can assume that flock never returns EAGAIN, which is not true:
strace:
...flock(3, LOCK_EX|LOCK_NB) = -1 EAGAIN (Resource temporarily unavailable)
...
FWIW, this was on kernel 2.6.37.
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[Bug 29362] flock: can return EAGAIN contrary to manpage
https://bugzilla.kernel.org/show_bug.cgi?id=29362
Michael Kerrisk <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |[email protected]
Resolution| |INVALID--- Comment #1 from Michael Kerrisk <[email protected]> 2012-08-16 06:40:49 --- EAGAIN has the same value as EWOULDBLOCK, which is documented in the man page.flock() comes from BSD, where the EWOULDBLOCK error is documented.
strace() can't tell the difference between the symbolic names EAGAIN and EWOULDBLOCK because it only knows about error numbers.
The errno(3) man page mentions that EGAIN and EWOULDBLOCK may have the same value.
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