[Bug manual/16074] New: Document that mmap() returns MAP_FAILED on error, as per the POSIX standard.

["libnoon at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16074

            Bug ID: 16074
           Summary: Document that mmap() returns MAP_FAILED on error, as
                    per the POSIX standard.
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: manual
          Assignee: unassigned at sourceware dot org
          Reporter: libnoon at gmail dot com
                CC: mtk.manpages at gmail dot com, roland at gnu dot org

Created attachment 7247
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7247&action=edit
The proposed patch.

Hello,

This patch documents mmap() as returning MAP_FAILED on error, as required by
POSIX:
http://pubs.opengroup.org/onlinepubs/009695399/functions/mmap.html

Previously, the documentation indicated that it returns -1 on error, which is
cumbersome (cast needed between pointer and integer) and not portable.

Could you please review the attached patch?

Thanks!

Best regards
Fabrice

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