diff mbox

[[PATCH,RFC,2] 24/63] Y2038: add function __futimes64

Message ID 20180418201819.15952-25-albert.aribaud@3adev.fr
State New
Headers show

Commit Message

Albert ARIBAUD April 18, 2018, 8:17 p.m. UTC
---
 misc/futimes.c                    |  9 ++++++
 sysdeps/unix/sysv/linux/futimes.c | 59 +++++++++++++++++++++++++++++++++++++++
 time/Versions                     |  1 +
 3 files changed, 69 insertions(+)
diff mbox

Patch

diff --git a/misc/futimes.c b/misc/futimes.c
index 3ffa40b0b1..c8756a01d2 100644
--- a/misc/futimes.c
+++ b/misc/futimes.c
@@ -30,3 +30,12 @@  __futimes (int fd, const struct timeval tvp[2])
 weak_alias (__futimes, futimes)
 
 stub_warning (futimes)
+
+int
+__futimes64 (int fd, const struct __timeval64 tvp[2])
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+
+stub_warning (__futimes64)
diff --git a/sysdeps/unix/sysv/linux/futimes.c b/sysdeps/unix/sysv/linux/futimes.c
index 9e6267cda7..fb644d79af 100644
--- a/sysdeps/unix/sysv/linux/futimes.c
+++ b/sysdeps/unix/sysv/linux/futimes.c
@@ -49,3 +49,62 @@  __futimes (int fd, const struct timeval tvp[2])
   return INLINE_SYSCALL (utimensat, 4, fd, NULL, tvp ? &ts : NULL, 0);
 }
 weak_alias (__futimes, futimes)
+
+/* 64-bit time version */
+
+extern int __y2038_linux_support;
+
+int
+__futimes64 (int fd, const struct __timeval64 tvp[2])
+{
+  struct timespec ts32[2], *ts32p = NULL;
+/* Only try and use this syscall if defined by kernel */
+#ifdef __NR_utimensat64
+  /* The utimensat system call expects timespec not timeval.  */
+  struct __timespec64 ts64[2], *ts64p = NULL;
+  int result;
+#endif
+
+/* Only try and use this syscall if defined by kernel */
+#ifdef __NR_utimensat64
+  if (__y2038_linux_support)
+    {
+      if (tvp != NULL)
+        {
+          if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
+              || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
+  	    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
+        
+          ts64[0].tv_sec = tvp[0].tv_sec;
+          ts64[0].tv_nsec = tvp[0].tv_usec * 1000;
+          ts64[0].tv_pad = 0;
+          ts64[1].tv_sec = tvp[1].tv_sec;
+          ts64[1].tv_nsec = tvp[1].tv_usec * 1000;
+          ts64[1].tv_pad = 0;
+          ts64p = ts64;
+        }
+    
+      result = INLINE_SYSCALL (utimensat64, 4, fd, NULL, ts64p, 0);
+      if (result == 0 || errno != ENOSYS)
+        return result;
+    }
+#endif
+
+  if (tvp != NULL)
+    {
+      if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
+          || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
+        return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
+    
+      if (tvp[0].tv_sec > INT_MAX || tvp[1].tv_sec > INT_MAX)
+        return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
+    
+      ts32[0].tv_sec = tvp[0].tv_sec;
+      ts32[0].tv_nsec = tvp[0].tv_usec * 1000;
+      ts32[1].tv_sec = tvp[1].tv_sec;
+      ts32[1].tv_nsec = tvp[1].tv_usec * 1000;
+      ts32p = ts32;
+    }
+
+  return INLINE_SYSCALL (utimensat, 4, fd, NULL, ts32p, 0);
+}
diff --git a/time/Versions b/time/Versions
index eec5f95610..40557720bf 100644
--- a/time/Versions
+++ b/time/Versions
@@ -82,5 +82,6 @@  libc {
     __futimens64;
     __utimensat64;
     __sigtimedwait64;
+    __futimes64;
   }
 }