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    Command:

    lutimes

    
         Standard C Library (libc, -lc)
    
    
    

    SYNOPSIS

         #include <sys/time.h>
    
         int
         utimes(const char *path, const struct timeval *times);
    
         int
         lutimes(const char *path, const struct timeval *times);
    
         int
         futimes(int fd, const struct timeval *times);
    
         int
         futimesat(int fd, const char *path, const struct timeval times[2]);
    
    
    

    DESCRIPTION

         The access and modification times of the file named by path or referenced
         by fd are changed as specified by the argument times.
    
         If times is NULL, the access and modification times are set to the cur-
         rent time.  The caller must be the owner of the file, have permission to
         write the file, or be the super-user.
    
         If times is non-NULL, it is assumed to point to an array of two timeval
         structures.  The access time is set to the value of the first element,
         and the modification time is set to the value of the second element.  For
         file systems that support file birth (creation) times (such as UFS2), the
         birth time will be set to the value of the second element if the second
         element is older than the currently set birth time.  To set both a birth
         time and a modification time, two calls are required; the first to set
         the birth time and the second to set the (presumably newer) modification
         time.  Ideally a new system call will be added that allows the setting of
         all three times at once.  The caller must be the owner of the file or be
         the super-user.
    
         In either case, the inode-change-time of the file is set to the current
         time.
    
         The lutimes() system call is like utimes() except in the case where the
         named file is a symbolic link, in which case lutimes() changes the access
         and modification times of the link, while utimes() changes the times of
         the file the link references.
    
         The futimesat() system call is equivalent to utimes() except in the case
         where path specifies a relative path.  In this case the access and modi-
         fication time is set to that of a file relative to the directory associ-
         ated with the file descriptor fd instead of the current working direc-
         tory.  If futimesat() is passed the special value AT_FDCWD in the fd
         parameter, the current working directory is used and the behavior is
         identical to a call to utimes().
    
         [EFAULT]           The path or times argument points outside the pro-
                            cess's allocated address space.
    
         [EIO]              An I/O error occurred while reading or writing the
                            affected inode.
    
         [ELOOP]            Too many symbolic links were encountered in translat-
                            ing the pathname.
    
         [ENAMETOOLONG]     A component of a pathname exceeded NAME_MAX charac-
                            ters, or an entire path name exceeded PATH_MAX charac-
                            ters.
    
         [ENOENT]           The named file does not exist.
    
         [ENOTDIR]          A component of the path prefix is not a directory.
    
         [EPERM]            The times argument is not NULL and the calling pro-
                            cess's effective user ID does not match the owner of
                            the file and is not the super-user.
    
         [EPERM]            The named file has its immutable or append-only flag
                            set, see the chflags(2) manual page for more informa-
                            tion.
    
         [EROFS]            The file system containing the file is mounted read-
                            only.
    
         The futimes() system call will fail if:
    
         [EBADF]            The fd argument does not refer to a valid descriptor.
    
         All of the system calls will fail if:
    
         [EACCES]           The times argument is NULL and the effective user ID
                            of the process does not match the owner of the file,
                            and is not the super-user, and write access is denied.
    
         [EFAULT]           The times argument points outside the process's allo-
                            cated address space.
    
         [EINVAL]           The tv_usec component of at least one of the values
                            specified by the times argument has a value less than
                            0 or greater than 999999.
    
         [EIO]              An I/O error occurred while reading or writing the
                            affected inode.
    
         [EPERM]            The times argument is not NULL and the calling pro-
                            cess's effective user ID does not match the owner of
                            the file and is not the super-user.
    
    
    

    SEE ALSO

         chflags(2), stat(2), utime(3)
    
    
    

    STANDARDS

         The utimes() function is expected to conform to X/Open Portability Guide
         Issue 4.2 ("XPG4.2").  The futimesat() system call follows The Open Group
         Extended API Set 2 specification.
    
    
    

    HISTORY

         The utimes() system call appeared in 4.2BSD.  The futimes() and lutimes()
         system calls first appeared in FreeBSD 3.0.  The futimesat() system call
         appeared in FreeBSD 8.0.
    
    
    

    BSD April 10, 2008 BSD

    
    
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