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unix: add Statx on Linux

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statx(2) allows to get enhanced file status information (not currently
available through the existing stat syscalls), lightweight stat,
heavyweight stat. The Statx_t type used by Statx has consistent field
sizes on all arches (with year-2038-capable timestamps) and is closer to
the BSD implementation of Stat_t.

See http://man7.org/linux/man-pages/man2/statx.2.html for details. The
syscall was added in Linux kernel 4.11.

See https://github.com/tklauser/statx for an example of how this
function and types can be used to report stat(1)-like file status
information.

Change-Id: I9e9642b5b42a393f94fd532453888ce9ba4f0003
Reviewed-on: https://go-review.googlesource.com/87555
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Tobias Klauser
2018-01-15 08:58:44 +00:00
committed by Tobias Klauser
parent 52ba35ddf9
commit fff93fa7cd
38 changed files with 952 additions and 37 deletions
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unix/linux/types.go
+30 -4
View File
@@ -47,11 +47,12 @@ package unix
#include <sys/utsname.h>
#include <sys/wait.h>
#include <linux/filter.h>
#include <linux/icmpv6.h>
#include <linux/keyctl.h>
#include <linux/netlink.h>
#include <linux/perf_event.h>
#include <linux/rtnetlink.h>
#include <linux/icmpv6.h>
#include <linux/stat.h>
#include <asm/termbits.h>
#include <asm/ptrace.h>
#include <time.h>
@@ -116,6 +117,21 @@ struct stat {
#endif
// These are defined in linux/fcntl.h, but including it globally causes
// conflicts with fcntl.h
#ifndef AT_STATX_SYNC_TYPE
# define AT_STATX_SYNC_TYPE 0x6000 // Type of synchronisation required from statx()
#endif
#ifndef AT_STATX_SYNC_AS_STAT
# define AT_STATX_SYNC_AS_STAT 0x0000 // - Do whatever stat() does
#endif
#ifndef AT_STATX_FORCE_SYNC
# define AT_STATX_FORCE_SYNC 0x2000 // - Force the attributes to be sync'd with the server
#endif
#ifndef AT_STATX_DONT_SYNC
# define AT_STATX_DONT_SYNC 0x4000 // - Don't sync attributes with the server
#endif
#ifdef TCSETS2
// On systems that have "struct termios2" use this as type Termios.
typedef struct termios2 termios_t;
@@ -249,6 +265,10 @@ type Stat_t C.struct_stat
type Statfs_t C.struct_statfs
type StatxTimestamp C.struct_statx_timestamp
type Statx_t C.struct_statx
type Dirent C.struct_dirent
type Fsid C.fsid_t
@@ -513,9 +533,15 @@ type Ustat_t C.struct_ustat
type EpollEvent C.struct_my_epoll_event
const (
AT_FDCWD = C.AT_FDCWD
AT_NO_AUTOMOUNT = C.AT_NO_AUTOMOUNT
AT_REMOVEDIR = C.AT_REMOVEDIR
AT_EMPTY_PATH = C.AT_EMPTY_PATH
AT_FDCWD = C.AT_FDCWD
AT_NO_AUTOMOUNT = C.AT_NO_AUTOMOUNT
AT_REMOVEDIR = C.AT_REMOVEDIR
AT_STATX_SYNC_AS_STAT = C.AT_STATX_SYNC_AS_STAT
AT_STATX_FORCE_SYNC = C.AT_STATX_FORCE_SYNC
AT_STATX_DONT_SYNC = C.AT_STATX_DONT_SYNC
AT_SYMLINK_FOLLOW = C.AT_SYMLINK_FOLLOW
AT_SYMLINK_NOFOLLOW = C.AT_SYMLINK_NOFOLLOW
)