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lockf.3: ERRORS: EBADF can also occur for nonwritable file descriptor 

As noted in the DESCRIPTION, the file descriptor must be writable
in order to place a lock.

Reported-by: Mikel Ward <mikel@mikelward.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2011-09-11 17:19:38 +02:00
parent a2f4e5a8ba
commit c28d4af607
1 changed files with 10 additions and 2 deletions
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12
man3/lockf.3
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@ -19,7 +19,7 @@
.\" Added section stuff, aeb, 2002-04-22.
.\" Corrected include file, drepper, 2003-06-15.
.\"
.TH LOCKF 3 2010-09-20 "GNU" "Linux Programmer's Manual"
.TH LOCKF 3 2011-09-11 "GNU" "Linux Programmer's Manual"
.SH NAME
lockf \- apply, test or remove a POSIX lock on an open file
.SH SYNOPSIS
@ -124,7 +124,15 @@ been memory-mapped by another process.
.TP
.B EBADF
.I fd
is not an open file descriptor.
is not an open file descriptor; or
.I cmd
is
.B F_LOCK
or
.BR F_TLOCK
and
.I fd
is not a writable file descriptor.
.TP
.B EDEADLK
The command was