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unix: add Fstatat on Linux for all GOOSes

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Looks like it's enough to just add wrappers pointing to the
corresponding SYS_FSTATAT{,64} or SYS_NEWFSTATAT syscall. Add a test to
verify that assumption which checks that the returned stat data matches
what is returned by Stat/Lstat.

Also add the AT_NO_AUTOMOUNT constant which may be used for the flags
parmeter.

Fixes golang/go#14216

Change-Id: I73f27b483bd97d2dcf09d4b95a7957e75d194395
Reviewed-on: https://go-review.googlesource.com/79795
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Tobias Klauser
2017-11-24 17:10:47 +00:00
committed by Brad Fitzpatrick
parent a13efeb2fd
commit 4ff8c001ce
32 changed files with 208 additions and 1 deletions
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unix/syscall_linux_386.go
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@@ -54,6 +54,7 @@ func Pipe2(p []int, flags int) (err error) {
//sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64_64
//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
//sysnb Getegid() (egid int) = SYS_GETEGID32
//sysnb Geteuid() (euid int) = SYS_GETEUID32