148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
#define _BSD_SOURCE
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#include <sys/stat.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdint.h>
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#include <sys/sysmacros.h>
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#include "syscall.h"
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#include "kstat.h"
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struct statx {
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uint32_t stx_mask;
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uint32_t stx_blksize;
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uint64_t stx_attributes;
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uint32_t stx_nlink;
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uint32_t stx_uid;
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uint32_t stx_gid;
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uint16_t stx_mode;
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uint16_t pad1;
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uint64_t stx_ino;
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uint64_t stx_size;
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uint64_t stx_blocks;
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uint64_t stx_attributes_mask;
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struct {
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int64_t tv_sec;
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uint32_t tv_nsec;
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int32_t pad;
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} stx_atime, stx_btime, stx_ctime, stx_mtime;
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uint32_t stx_rdev_major;
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uint32_t stx_rdev_minor;
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uint32_t stx_dev_major;
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uint32_t stx_dev_minor;
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uint64_t spare[14];
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};
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static int fstatat_statx(int fd, const char *restrict path, struct stat *restrict st, int flag)
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{
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struct statx stx;
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int ret = __syscall(SYS_statx, fd, path, flag, 0x7ff, &stx);
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if (ret) return ret;
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*st = (struct stat){
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.st_dev = makedev(stx.stx_dev_major, stx.stx_dev_minor),
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.st_ino = stx.stx_ino,
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.st_mode = stx.stx_mode,
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.st_nlink = stx.stx_nlink,
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.st_uid = stx.stx_uid,
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.st_gid = stx.stx_gid,
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.st_rdev = makedev(stx.stx_rdev_major, stx.stx_rdev_minor),
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.st_size = stx.stx_size,
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.st_blksize = stx.stx_blksize,
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.st_blocks = stx.stx_blocks,
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.st_atim.tv_sec = stx.stx_atime.tv_sec,
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.st_atim.tv_nsec = stx.stx_atime.tv_nsec,
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.st_mtim.tv_sec = stx.stx_mtime.tv_sec,
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.st_mtim.tv_nsec = stx.stx_mtime.tv_nsec,
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.st_ctim.tv_sec = stx.stx_ctime.tv_sec,
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.st_ctim.tv_nsec = stx.stx_ctime.tv_nsec,
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#if _REDIR_TIME64
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.__st_atim32.tv_sec = stx.stx_atime.tv_sec,
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.__st_atim32.tv_nsec = stx.stx_atime.tv_nsec,
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.__st_mtim32.tv_sec = stx.stx_mtime.tv_sec,
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.__st_mtim32.tv_nsec = stx.stx_mtime.tv_nsec,
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.__st_ctim32.tv_sec = stx.stx_ctime.tv_sec,
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.__st_ctim32.tv_nsec = stx.stx_ctime.tv_nsec,
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#endif
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};
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return 0;
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}
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static int fstatat_kstat(int fd, const char *restrict path, struct stat *restrict st, int flag)
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{
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int ret;
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struct kstat kst;
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if (flag==AT_EMPTY_PATH && fd>=0 && !*path) {
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ret = __syscall(SYS_fstat, fd, &kst);
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if (ret==-EBADF && __syscall(SYS_fcntl, fd, F_GETFD)>=0) {
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ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
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if (ret==-EINVAL) {
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char buf[15+3*sizeof(int)];
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__procfdname(buf, fd);
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#ifdef SYS_stat
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ret = __syscall(SYS_stat, buf, &kst);
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#else
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ret = __syscall(SYS_fstatat, AT_FDCWD, buf, &kst, 0);
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#endif
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}
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}
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}
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#ifdef SYS_lstat
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else if ((fd == AT_FDCWD || *path=='/') && flag==AT_SYMLINK_NOFOLLOW)
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ret = __syscall(SYS_lstat, path, &kst);
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#endif
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#ifdef SYS_stat
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else if ((fd == AT_FDCWD || *path=='/') && !flag)
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ret = __syscall(SYS_stat, path, &kst);
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#endif
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else ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
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if (ret) return ret;
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*st = (struct stat){
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.st_dev = kst.st_dev,
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.st_ino = kst.st_ino,
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.st_mode = kst.st_mode,
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.st_nlink = kst.st_nlink,
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.st_uid = kst.st_uid,
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.st_gid = kst.st_gid,
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.st_rdev = kst.st_rdev,
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.st_size = kst.st_size,
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.st_blksize = kst.st_blksize,
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.st_blocks = kst.st_blocks,
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.st_atim.tv_sec = kst.st_atime_sec,
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.st_atim.tv_nsec = kst.st_atime_nsec,
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.st_mtim.tv_sec = kst.st_mtime_sec,
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.st_mtim.tv_nsec = kst.st_mtime_nsec,
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.st_ctim.tv_sec = kst.st_ctime_sec,
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.st_ctim.tv_nsec = kst.st_ctime_nsec,
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#if _REDIR_TIME64
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.__st_atim32.tv_sec = kst.st_atime_sec,
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.__st_atim32.tv_nsec = kst.st_atime_nsec,
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.__st_mtim32.tv_sec = kst.st_mtime_sec,
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.__st_mtim32.tv_nsec = kst.st_mtime_nsec,
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.__st_ctim32.tv_sec = kst.st_ctime_sec,
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.__st_ctim32.tv_nsec = kst.st_ctime_nsec,
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#endif
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};
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return 0;
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}
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int fstatat(int fd, const char *restrict path, struct stat *restrict st, int flag)
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{
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int ret;
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if (sizeof((struct kstat){0}.st_atime_sec) < sizeof(time_t)) {
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ret = fstatat_statx(fd, path, st, flag);
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if (ret!=-ENOSYS) return __syscall_ret(ret);
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}
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ret = fstatat_kstat(fd, path, st, flag);
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return __syscall_ret(ret);
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}
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#if !_REDIR_TIME64
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weak_alias(fstatat, fstatat64);
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#endif
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