minix/lib/libc/sys-minix/utimensat.c
Antoine Leca 9131e98a7d utimens(2) system call
Variant of utime(2) with struct timespec (with ns precision)
instead of time_t values; also allows for tv_nsec members
the values UTIME_NOW (force update to current time) or
UTIME_OMIT (allow to set either atim or mtim independently.)

Provides a superset of utimes(2), futimes(2), lutimes(2),
and futimens(2).
Provides the same subset of utimensat(2) as does NetBSD 6.
Also import utimens() and lutimeNS() from NetBSD-current.
2013-04-12 18:55:39 +00:00

43 lines
1.2 KiB
C

#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include <errno.h>
/* Implement a very large but not complete subset of the utimensat()
* Posix:2008/XOpen-7 function.
* Are handled the following cases:
* . utimensat(AT_FDCWD, "/some/absolute/path", , )
* . utimensat(AT_FDCWD, "some/path", , )
* . utimensat(fd, "/some/absolute/path", , ) although fd is useless here
* Are not handled the following cases:
* . utimensat(fd, "some/path", , ) path to a file relative to some open fd
*/
int utimensat(int fd, const char *name, const struct timespec tv[2],
int flags)
{
message m;
static const struct timespec now[2] = { {0, UTIME_NOW}, {0, UTIME_NOW} };
if (tv == NULL) tv = now;
if (name == NULL) return EINVAL;
if (name[0] == '\0') return ENOENT; /* POSIX requirement */
if (fd != AT_FDCWD && name[0] != '/') return EINVAL; /* Not supported */
m.m2_i1 = strlen(name) + 1;
m.m2_p1 = (char *) __UNCONST(name);
m.m2_l1 = tv[0].tv_sec;
m.m2_l2 = tv[1].tv_sec;
m.m2_i2 = tv[0].tv_nsec;
m.m2_i3 = tv[1].tv_nsec;
if ((unsigned)flags > SHRT_MAX)
return EINVAL;
else
m.m2_s1 = flags;
return(_syscall(VFS_PROC_NR, UTIMENS, &m));
}