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add statx interface using syscall, fallback to fstatat

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This commit is contained in:
Duncan Bellamy 2022-08-31 20:07:34 +01:00 committed by Rich Felker
parent d0ed307e6f
commit b817541f1c
2 changed files with 97 additions and 0 deletions
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55
include/sys/stat.h
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@ -18,6 +18,13 @@ extern "C" {
#define __NEED_blkcnt_t
#define __NEED_struct_timespec
#ifdef _GNU_SOURCE
#define __NEED_int64_t
#define __NEED_uint64_t
#define __NEED_uint32_t
#define __NEED_uint16_t
#endif
#include <bits/alltypes.h>
#include <bits/stat.h>
@ -98,6 +105,54 @@ int lchmod(const char *, mode_t);
#define S_IEXEC S_IXUSR
#endif
#if defined(_GNU_SOURCE)
#define STATX_TYPE 1U
#define STATX_MODE 2U
#define STATX_NLINK 4U
#define STATX_UID 8U
#define STATX_GID 0x10U
#define STATX_ATIME 0x20U
#define STATX_MTIME 0x40U
#define STATX_CTIME 0x80U
#define STATX_INO 0x100U
#define STATX_SIZE 0x200U
#define STATX_BLOCKS 0x400U
#define STATX_BASIC_STATS 0x7ffU
#define STATX_BTIME 0x800U
#define STATX_ALL 0xfffU
struct statx_timestamp {
int64_t tv_sec;
uint32_t tv_nsec, __pad;
};
struct statx {
uint32_t stx_mask;
uint32_t stx_blksize;
uint64_t stx_attributes;
uint32_t stx_nlink;
uint32_t stx_uid;
uint32_t stx_gid;
uint16_t stx_mode;
uint16_t __pad0[1];
uint64_t stx_ino;
uint64_t stx_size;
uint64_t stx_blocks;
uint64_t stx_attributes_mask;
struct statx_timestamp stx_atime;
struct statx_timestamp stx_btime;
struct statx_timestamp stx_ctime;
struct statx_timestamp stx_mtime;
uint32_t stx_rdev_major;
uint32_t stx_rdev_minor;
uint32_t stx_dev_major;
uint32_t stx_dev_minor;
uint64_t __pad1[14];
};
int statx(int, const char *__restrict, int, unsigned, struct statx *__restrict);
#endif
#if defined(_LARGEFILE64_SOURCE)
#define stat64 stat
#define fstat64 fstat

42
src/linux/statx.c Normal file
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@ -0,0 +1,42 @@
#define _GNU_SOURCE
#include <sys/stat.h>
#include <string.h>
#include <syscall.h>
#include <sys/sysmacros.h>
#include <errno.h>
int statx(int dirfd, const char *restrict path, int flags, unsigned mask, struct statx *restrict stx)
{
int ret = __syscall(SYS_statx, dirfd, path, flags, mask, stx);
#ifndef SYS_fstatat
return __syscall_ret(ret);
#endif
if (ret != -ENOSYS) return __syscall_ret(ret);
struct stat st;
ret = fstatat(dirfd, path, &st, flags);
if (ret) return ret;
stx->stx_dev_major = major(st.st_dev);
stx->stx_dev_minor = minor(st.st_dev);
stx->stx_ino = st.st_ino;
stx->stx_mode = st.st_mode;
stx->stx_nlink = st.st_nlink;
stx->stx_uid = st.st_uid;
stx->stx_gid = st.st_gid;
stx->stx_size = st.st_size;
stx->stx_blksize = st.st_blksize;
stx->stx_blocks = st.st_blocks;
stx->stx_atime.tv_sec = st.st_atim.tv_sec;
stx->stx_atime.tv_nsec = st.st_atim.tv_nsec;
stx->stx_mtime.tv_sec = st.st_mtim.tv_sec;
stx->stx_mtime.tv_nsec = st.st_mtim.tv_nsec;
stx->stx_ctime.tv_sec = st.st_ctim.tv_sec;
stx->stx_ctime.tv_nsec = st.st_ctim.tv_nsec;
stx->stx_btime = (struct statx_timestamp){.tv_sec=0, .tv_nsec=0};
stx->stx_mask = STATX_BASIC_STATS;
return 0;
}