[[PATCH,RFC,2] 32/63] Y2038: add function __fstat64_t64 (and __fxstat64_t64)
Commit Message
There is no Y2038-proof linux struct stat for now, so these
implementations just use the existing syscalls and convert from kernel
32-bit-time struct stat64 to GLIBC Y2038-ready struct __stat64_t64.
---
include/sys/stat.h | 3 +++
io/Versions | 1 +
io/fstat64.c | 7 ++++++
sysdeps/unix/sysv/linux/fxstat64.c | 50 ++++++++++++++++++++++++++++++++++++++
4 files changed, 61 insertions(+)
@@ -38,6 +38,9 @@ extern int __mkdir (const char *__path, __mode_t __mode);
libc_hidden_proto (__mkdir)
extern int __mknod (const char *__path,
__mode_t __mode, __dev_t __dev);
+extern int __fxstat64_t64 (int __ver, int __fildes,
+ struct __stat64_t64 *__stat_buf);
+
#if IS_IN (libc) || (IS_IN (rtld) && !defined NO_RTLD_HIDDEN)
hidden_proto (__fxstat)
hidden_proto (__fxstat64)
@@ -127,5 +127,6 @@ libc {
}
GLIBC_2.27 {
copy_file_range;
+ __fxstat64_t64;
}
}
@@ -50,3 +50,10 @@ fstat64 (int fd, struct stat64 *buf)
{
return __fxstat64 (_STAT_VER, fd, buf);
}
+
+int
+attribute_hidden
+__fstat64_t64 (int fd, struct __stat64_t64 *buf)
+{
+ return __fxstat64_t64 (_STAT_VER, fd, buf);
+}
@@ -51,3 +51,53 @@ hidden_ver (___fxstat64, __fxstat64)
strong_alias (___fxstat64, __fxstat64)
hidden_def (__fxstat64)
#endif
+
+/* 64-bit time version */
+
+extern int __y2038_linux_support;
+
+int
+__fxstat64_t64 (int vers, int fd, struct __stat64_t64 *buf)
+{
+ int result;
+ struct stat64 st64;
+
+ if (__y2038_linux_support)
+ {
+ // TODO: use 64-bit syscalls when they become available
+ }
+
+ result = INLINE_SYSCALL (fstat64, 2, fd, &st64);
+#if defined _HAVE_STAT64___ST_INO && !__ASSUME_ST_INO_64_BIT
+ if (__builtin_expect (!result, 1) && st64.__st_ino != (__ino_t) st64.st_ino)
+ st64.st_ino = st64.__st_ino;
+#endif
+ if (!result)
+ {
+ buf->st_dev = st64.st_dev;
+ //buf->__pad1 = st64.__pad1;
+
+#if defined _HAVE_STAT64___ST_INO
+ buf->__st_ino = st64.__st_ino;
+#endif
+ buf->st_mode = st64.st_mode;
+ buf->st_nlink = st64.st_nlink;
+ buf->st_uid = st64.st_uid;
+ buf->st_gid = st64.st_gid;
+ buf->st_rdev = st64.st_rdev;
+ buf->__pad2 = st64.__pad2;
+ buf->st_size = st64.st_size;
+ buf->st_blksize = st64.st_blksize;
+
+ buf->st_blocks = st64.st_blocks;
+ buf->st_atim.tv_sec = st64.st_atim.tv_sec;
+ buf->st_atim.tv_nsec = st64.st_atim.tv_nsec;
+ buf->st_mtim.tv_sec = st64.st_mtim.tv_sec;
+ buf->st_mtim.tv_nsec = st64.st_mtim.tv_nsec;
+ buf->st_ctim.tv_sec = st64.st_ctim.tv_sec;
+ buf->st_ctim.tv_nsec = st64.st_ctim.tv_nsec;
+
+ buf->st_ino = st64.st_ino;
+ }
+ return result;
+}