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y2038: linux: Provide __futimesat64 implementation

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This conversion patch for supporting 64 bit time for futimesat only differs
from the work performed for futimes (when providing __futimes64) with passing
also the file name (and path) to utimensat.

All the design and conversion decisions are exactly the same as for futimens
conversion.
This commit is contained in:
Lukasz Majewski 2020-02-16 23:42:14 +01:00
parent 1a5e12826c
commit 8b8f39376b
2 changed files with 32 additions and 13 deletions
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4
include/time.h
View file

@ -207,11 +207,15 @@ libc_hidden_proto (__utimensat64_helper);
#if __TIMESIZE == 64
# define __futimes64 __futimes
# define __futimesat64 __futimesat
# define __lutimes64 __lutimes
# define __futimens64 __futimens
#else
extern int __futimes64 (int fd, const struct __timeval64 tvp64[2]);
libc_hidden_proto (__futimes64);
extern int __futimesat64 (int fd, const char *file,
const struct __timeval64 tvp[2]);
libc_hidden_proto (__futimesat64);
extern int __lutimes64 (const char *file, const struct __timeval64 tvp64[2]);
libc_hidden_proto (__lutimes64);
extern int __futimens64 (int fd, const struct __timespec64 tsp[2]);

41
sysdeps/unix/sysv/linux/futimesat.c
View file

@ -17,23 +17,38 @@
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <utime.h>
#include <sys/time.h>
#include <sysdep.h>
#include <time.h>
/* Change the access time of FILE relative to FD to TVP[0] and
the modification time of FILE to TVP[1]. */
int
futimesat (int fd, const char *file, const struct timeval tvp[2])
__futimesat64 (int fd, const char *file, const struct __timeval64 tvp64[2])
{
if (file == NULL)
return __futimes (fd, tvp);
struct __timespec64 ts64[2];
if (tvp64 != NULL)
{
ts64[0] = timeval64_to_timespec64 (tvp64[0]);
ts64[1] = timeval64_to_timespec64 (tvp64[1]);
}
/* Avoid implicit array coercion in syscall macros. */
return INLINE_SYSCALL (futimesat, 3, fd, file, &tvp[0]);
return __utimensat64_helper (fd, file, tvp64 ? &ts64[0] : NULL, 0);
}
#if __TIMESIZE != 64
libc_hidden_def (__futimesat64)
int
__futimesat (int fd, const char *file, const struct timeval tvp[2])
{
struct __timeval64 tv64[2];
if (tvp != NULL)
{
tv64[0] = valid_timeval_to_timeval64 (tvp[0]);
tv64[1] = valid_timeval_to_timeval64 (tvp[1]);
}
return __futimesat64 (fd, file, tvp ? &tv64[0] : NULL);
}
#endif
weak_alias (__futimesat, futimesat)