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#define _BSD_SOURCE
#include <sys/stat.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <stdint.h>
#include <sys/sysmacros.h>
#include "syscall.h"
#include "kstat.h"
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 pad1;
uint64_t stx_ino;
uint64_t stx_size;
uint64_t stx_blocks;
uint64_t stx_attributes_mask;
struct {
int64_t tv_sec;
uint32_t tv_nsec;
int32_t pad;
} stx_atime, stx_btime, stx_ctime, stx_mtime;
uint32_t stx_rdev_major;
uint32_t stx_rdev_minor;
uint32_t stx_dev_major;
uint32_t stx_dev_minor;
uint64_t spare[14];
};
static int fstatat_statx(int fd, const char *restrict path, struct stat *restrict st, int flag)
{
struct statx stx;
int ret = __syscall(SYS_statx, fd, path, flag, 0x7ff, &stx);
if (ret) return ret;
*st = (struct stat){
.st_dev = makedev(stx.stx_dev_major, stx.stx_dev_minor),
.st_ino = stx.stx_ino,
.st_mode = stx.stx_mode,
.st_nlink = stx.stx_nlink,
.st_uid = stx.stx_uid,
.st_gid = stx.stx_gid,
.st_rdev = makedev(stx.stx_rdev_major, stx.stx_rdev_minor),
.st_size = stx.stx_size,
.st_blksize = stx.stx_blksize,
.st_blocks = stx.stx_blocks,
.st_atim.tv_sec = stx.stx_atime.tv_sec,
.st_atim.tv_nsec = stx.stx_atime.tv_nsec,
.st_mtim.tv_sec = stx.stx_mtime.tv_sec,
.st_mtim.tv_nsec = stx.stx_mtime.tv_nsec,
.st_ctim.tv_sec = stx.stx_ctime.tv_sec,
.st_ctim.tv_nsec = stx.stx_ctime.tv_nsec,
};
return 0;
}
static int fstatat_kstat(int fd, const char *restrict path, struct stat *restrict st, int flag)
{
int ret;
struct kstat kst;
if (flag==AT_EMPTY_PATH && fd>=0 && !*path) {
ret = __syscall(SYS_fstat, fd, st);
if (ret==-EBADF && __syscall(SYS_fcntl, fd, F_GETFD)>=0) {
ret = __syscall(SYS_fstatat, fd, path, st, flag);
if (ret==-EINVAL) {
char buf[15+3*sizeof(int)];
__procfdname(buf, fd);
#ifdef SYS_stat
ret = __syscall(SYS_stat, buf, st);
#else
ret = __syscall(SYS_fstatat, AT_FDCWD, buf, st, 0);
#endif
}
}
}
#ifdef SYS_lstat
else if ((fd == AT_FDCWD || *path=='/') && flag==AT_SYMLINK_NOFOLLOW)
ret = __syscall(SYS_lstat, path, &kst);
#endif
#ifdef SYS_stat
else if ((fd == AT_FDCWD || *path=='/') && !flag)
ret = __syscall(SYS_stat, path, &kst);
#endif
else ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
if (ret) return ret;
*st = (struct stat){
.st_dev = kst.st_dev,
.st_ino = kst.st_ino,
.st_mode = kst.st_mode,
.st_nlink = kst.st_nlink,
.st_uid = kst.st_uid,
.st_gid = kst.st_gid,
.st_rdev = kst.st_rdev,
.st_size = kst.st_size,
.st_blksize = kst.st_blksize,
.st_blocks = kst.st_blocks,
.st_atim.tv_sec = kst.st_atime_sec,
.st_atim.tv_nsec = kst.st_atime_nsec,
.st_mtim.tv_sec = kst.st_mtime_sec,
.st_mtim.tv_nsec = kst.st_mtime_nsec,
.st_ctim.tv_sec = kst.st_ctime_sec,
.st_ctim.tv_nsec = kst.st_ctime_nsec,
};
return 0;
}
int fstatat(int fd, const char *restrict path, struct stat *restrict st, int flag)
{
int ret;
if (sizeof((struct kstat){0}.st_atime_sec) < sizeof(time_t)) {
ret = fstatat_statx(fd, path, st, flag);
if (ret!=-ENOSYS) return __syscall_ret(ret);
}
ret = fstatat_kstat(fd, path, st, flag);
return __syscall_ret(ret);
}
weak_alias(fstatat, fstatat64);
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