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Author SHA1 Message Date
Damien Neil 33da011f77 unix: check correct group in Faccessat 
The Faccessat call checks the user, group, or other permission bits of a
file to see if the calling process can access it. The test to see if the
group permissions should be used was made with the wrong group id, using
the process's group id rather than the file's group id. Fix this to use
the correct group id.

This change only affects Linux versions prior to 5.8. Linux 5.8 added
the faccessat2 system call, which we use in preference to the internal
implementation.

No test since we cannot easily change file permissions when not running
as root and the test is meaningless if running as root.

For golang/go#52313

Change-Id: I6fa64379a50c9380207eab9d095ef7fbd05a2d59
Reviewed-on: https://go-review.googlesource.com/c/sys/+/400074
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
 2022-04-12 21:12:40 +00:00
Damien Neil c8bc69bc2d unix: fix uint64->int cast of control message header 
Change-Id: I533233a08472b686d03573bcbae664c76919b18e
Reviewed-on: https://go-review.googlesource.com/22527
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-by: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
 2016-04-27 20:20:20 +00:00
Damien Neil f2654f8719 unix: add clock_gettime for Linux 
Includes 386, amd64, and arm for Linux.

Change-Id: I428bfb732141448659a94dc6e2ab7a98efea507a
Reviewed-on: https://go-review.googlesource.com/9766
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: David Symonds <dsymonds@golang.org>
 2015-05-06 23:20:22 +00:00