cp(1) - NetBSD Manual Pages

CP(1)                       NetBSD Reference Manual                      CP(1)


NAME

     cp - copy files


SYNOPSIS

     cp [-R [-H | -L | -P]] [-f | -i] [-p] source_file target_file
     cp [-R [-H | -L | -P]] [-f | -i] [-p] source_file ... target_directory


DESCRIPTION

     In the first synopsis form, the cp utility copies the contents of the
     source_file to the target_file.  In the second synopsis form, the con-
     tents of each named source_file is copied to the destination
     target_directory.  The names of the files themselves are not changed.  If
     cp detects an attempt to copy a file to itself, the copy will fail.

     The following options are available:

     -H    If the -R option is specified, symbolic links on the command line
           are followed.  (Symbolic links encountered in the tree traversal
           are not followed.)

     -L    If the -R option is specified, all symbolic links are followed.

     -P    If the -R option is specified, no symbolic links are followed.

     -R    If source_file designates a directory, cp copies the directory and
           the entire subtree connected at that point.  This option also caus-
           es symbolic links to be copied, rather than indirected through, and
           for cp to create special files rather than copying them as normal
           files.  Created directories have the same mode as the corresponding
           source directory, unmodified by the process' umask.

     -f    Foreach existing destination pathname, attempt to overwrite it. If
           permissions do not allow copy to succeed, remove it and create a
           new file, without prompting for confirmation.  (The -i option is
           ignored if the -f option is specified.)

     -i    Causes cp to write a prompt to the standard error output before
           copying a file that would overwrite an existing file.  If the re-
           sponse from the standard input begins with the character `y', the
           file copy is attempted.

     -p    Causes cp to preserve in the copy as many of the modification time,
           access time, file flags, file mode, user ID, and group ID as al-
           lowed by permissions.

           If the user ID and group ID cannot be preserved, no error message
           is displayed and the exit value is not altered.

           If the source file has its set user ID bit on and the user ID can-
           not be preserved, the set user ID bit is not preserved in the
           copy's permissions.  If the source file has its set group ID bit on
           and the group ID cannot be preserved, the set group ID bit is not
           preserved in the copy's permissions.  If the source file has both
           its set user ID and set group ID bits on, and either the user ID or
           group ID cannot be preserved, neither the set user ID or set group
           ID bits are preserved in the copy's permissions.

     For each destination file that already exists, its contents are overwrit-
     ten if permissions allow, but its mode, user ID, and group ID are un-
     changed.

     In the second synopsis form, target_directory must exist unless there is
     only one named source_file which is a directory and the -R flag is speci-
     fied.

     If the destination file does not exist, the mode of the source file is
     used as modified by the file mode creation mask (umask, see csh(1)).  If
     the source file has its set user ID bit on, that bit is removed unless
     both the source file and the destination file are owned by the same user.
     If the source file has its set group ID bit on, that bit is removed un-
     less both the source file and the destination file are in the same group
     and the user is a member of that group.  If both the set user ID and set
     group ID bits are set, all of the above conditions must be fulfilled or
     both bits are removed.

     Appropriate permissions are required for file creation or overwriting.

     Symbolic links are always followed unless the -R flag is set, in which
     case symbolic links are not followed, by default.  The -H or -L flags (in
     conjunction with the -R flag) cause symbolic links to be followed as de-
     scribed above.  The -H, -L and -P options are ignored unless the -R op-
     tion is specified.  In addition, these options override each other and
     the command's actions are determined by the last one specified.


RETURN VALUES

     cp exits 0 on success, >0 if an error occurred.


COMPATIBILITY

     Historic versions of the cp utility had a -r option.  This implementation
     supports that option, however, its use is strongly discouraged, as it
     does not correctly copy special files, symbolic links or fifo's.


SEE ALSO

     mv(1), rcp(1), umask(2), fts(3), symlink(7)


STANDARDS

     The cp utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compati-
     ble.

NetBSD 1.5                      April 18, 1994                               2