remove LFS64 symbol aliases; replace with dynamic linker remapping

[musl] / src / stat / fstatat.c

diff --git a/src/stat/fstatat.c b/src/stat/fstatat.c
index f5bc368..0450637 100644 (file)
--- a/src/stat/fstatat.c
+++ b/src/stat/fstatat.c
@@ -3,38 +3,151 @@
 #include <string.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <stdint.h>
+#include <sys/sysmacros.h>
 #include "syscall.h"
 
-int fstatat(int fd, const char *restrict path, struct stat *restrict st, int flag)
+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,
+#if _REDIR_TIME64
+               .__st_atim32.tv_sec = stx.stx_atime.tv_sec,
+               .__st_atim32.tv_nsec = stx.stx_atime.tv_nsec,
+               .__st_mtim32.tv_sec = stx.stx_mtime.tv_sec,
+               .__st_mtim32.tv_nsec = stx.stx_mtime.tv_nsec,
+               .__st_ctim32.tv_sec = stx.stx_ctime.tv_sec,
+               .__st_ctim32.tv_nsec = stx.stx_ctime.tv_nsec,
+#endif
+       };
+       return 0;
+}
+
+#ifdef SYS_fstatat
+
+#include "kstat.h"
+
+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);
+               ret = __syscall(SYS_fstat, fd, &kst);
                if (ret==-EBADF && __syscall(SYS_fcntl, fd, F_GETFD)>=0) {
-                       ret = __syscall(SYS_fstatat, fd, path, st, flag);
+                       ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
                        if (ret==-EINVAL) {
                                char buf[15+3*sizeof(int)];
                                __procfdname(buf, fd);
 #ifdef SYS_stat
-                               ret = __syscall(SYS_stat, buf, st);
+                               ret = __syscall(SYS_stat, buf, &kst);
 #else
-                               ret = __syscall(SYS_fstatat, AT_FDCWD, buf, st, 0);
+                               ret = __syscall(SYS_fstatat, AT_FDCWD, buf, &kst, 0);
 #endif
                        }
                }
        }
 #ifdef SYS_lstat
        else if ((fd == AT_FDCWD || *path=='/') && flag==AT_SYMLINK_NOFOLLOW)
-               ret = __syscall(SYS_lstat, path, st);
+               ret = __syscall(SYS_lstat, path, &kst);
 #endif
 #ifdef SYS_stat
        else if ((fd == AT_FDCWD || *path=='/') && !flag)
-               ret = __syscall(SYS_stat, path, st);
+               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,
+#if _REDIR_TIME64
+               .__st_atim32.tv_sec = kst.st_atime_sec,
+               .__st_atim32.tv_nsec = kst.st_atime_nsec,
+               .__st_mtim32.tv_sec = kst.st_mtime_sec,
+               .__st_mtim32.tv_nsec = kst.st_mtime_nsec,
+               .__st_ctim32.tv_sec = kst.st_ctime_sec,
+               .__st_ctim32.tv_nsec = kst.st_ctime_nsec,
+#endif
+       };
+
+       return 0;
+}
 #endif
-       else ret = __syscall(SYS_fstatat, fd, path, st, flag);
 
+int __fstatat(int fd, const char *restrict path, struct stat *restrict st, int flag)
+{
+       int ret;
+#ifdef SYS_fstatat
+       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);
+#else
+       ret = fstatat_statx(fd, path, st, flag);
+#endif
        return __syscall_ret(ret);
 }
 
-weak_alias(fstatat, fstatat64);
+weak_alias(__fstatat, fstatat);