NAME

utimes - set file access and modification times

 SYNOPSIS

#include <sys/time.h>

int utimes(const char *path, const struct timeval times[2]);

 DESCRIPTION

The utimes() function sets the access and modification times of the file pointed to by the path argument to the value of the times argument. The utimes() function allows time specifications accurate to the microsecond.

For utimes(), the times argument is an array of timeval structures. The first array member represents the date and time of last access, and the second member represents the date and time of last modification. The times in the timeval structure are measured in seconds and microseconds since the Epoch, although rounding toward the nearest second may occur.

If the times argument is a null pointer, the access and modification times of the file are set to the current time. The effective user ID of the process must be the same as the owner of the file, or must have write access to the file or appropriate privileges to use this call in this manner. Upon completion, utimes() will mark the time of the last file status change, st_ctime, for update.

 RETURN VALUE

Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error, and the file times will not be affected.

 ERRORS

The utimes() function will fail if:

[EACCES]

Search permission is denied by a component of the path prefix; or the times argument is a null pointer and the effective user ID of the process does not match the owner of the file and write access is denied.

[ELOOP]

Too many symbolic links were encountered in resolving path.

[ENAMETOOLONG]

The length of the path argument exceeds {PATH_MAX} or a pathname component is longer than {NAME_MAX}.

[ENOENT]

A component of path does not name an existing file or path is an empty string.

[ENOTDIR]

A component of the path prefix is not a directory.

[EPERM]

The times argument is not a null pointer and the calling process' effective user ID has write access to the file but does not match the owner of the file and the calling process does not have the appropriate privileges.

[EROFS]

The file system containing the file is read-only.

The utimes() function may fail if:

[ENAMETOOLONG]

Pathname resolution of a symbolic link produced an intermediate result whose length exceeds {PATH_MAX}.

 EXAMPLES

None.

 APPLICATION USAGE

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

<sys/time.h>.