57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
#include <sys/cdefs.h>
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#include "namespace.h"
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#include <lib.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#include <limits.h>
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#include <errno.h>
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/* Implement a very large but not complete subset of the utimensat()
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* Posix:2008/XOpen-7 function.
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* Are handled the following cases:
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* . utimensat(AT_FDCWD, "/some/absolute/path", , )
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* . utimensat(AT_FDCWD, "some/path", , )
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* . utimensat(fd, "/some/absolute/path", , ) although fd is useless here
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* Are not handled the following cases:
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* . utimensat(fd, "some/path", , ) path to a file relative to some open fd
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*/
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int utimensat(int fd, const char *name, const struct timespec tv[2],
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int flags)
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{
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message m;
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static const struct timespec now[2] = { {0, UTIME_NOW}, {0, UTIME_NOW} };
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if (tv == NULL) tv = now;
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if (name == NULL) {
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errno = EINVAL;
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return -1;
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}
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if (name[0] == '\0') { /* POSIX requirement */
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errno = ENOENT;
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return -1;
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}
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if (fd != AT_FDCWD && name[0] != '/') { /* Not supported */
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errno = EINVAL;
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return -1;
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}
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if ((unsigned)flags > SHRT_MAX) {
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errno = EINVAL;
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return -1;
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}
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memset(&m, 0, sizeof(m));
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m.VFS_UTIMENS_LEN = strlen(name) + 1;
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m.VFS_UTIMENS_NAME = (char *) __UNCONST(name);
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/* For now just truncate time_t values to 32bits. */
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m.VFS_UTIMENS_ATIME = (int32_t)tv[0].tv_sec;
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m.VFS_UTIMENS_MTIME = (int32_t)tv[1].tv_sec;
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m.VFS_UTIMENS_ANSEC = (int32_t)tv[0].tv_nsec;
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m.VFS_UTIMENS_MNSEC = (int32_t)tv[1].tv_nsec;
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m.VFS_UTIMENS_FLAGS = flags;
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return(_syscall(VFS_PROC_NR, VFS_UTIMENS, &m));
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}
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