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poll.2: Fix description of ENOMEM error 

No file descriptors are being allocated...

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2020-02-20 15:00:26 +01:00
parent 836efc18d7
commit 8bcfd68889
1 changed files with 11 additions and 7 deletions
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18
man2/poll.2
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@ -343,15 +343,19 @@ is specified as NULL, then
.BR ppoll ()
can block indefinitely.
.SH RETURN VALUE
On success, a positive number is returned; this is
the number of structures which have nonzero
On success,
.BR poll ()
returns a nonnegative value which is the number of elements in the
.I pollfds
whose
.I revents
fields (in other words, those descriptors with events or errors reported).
A value of 0 indicates that the call timed out and no file
descriptors were ready.
fields have been set to a nonzero value (indicating an event or an error).
A return value of zero indicates that the system call timed out
before any file descriptors became read.
.PP
On error, \-1 is returned, and
.I errno
is set appropriately.
is set to indicate the cause of the error.
.SH ERRORS
.TP
.B EFAULT
@ -376,7 +380,7 @@ The timeout value expressed in
is invalid (negative).
.TP
.B ENOMEM
There was no space to allocate file descriptor tables.
Unable to allocate memory for kernel data structures.
.SH VERSIONS
The
.BR poll ()