gistfile1.txt

set backup              " Automatically make backup
set backupdir=$HOME/.vim-backup " Set backup directory
let &directory = &backupdir

autocmd BufWritePre,FileWritePre,FileAppendPre * call UpdateBackupFile()

function! UpdateBackupFile()
    let basedir = "$HOME/.vim-backup"
    let dir = strftime(basedir."/%Y%m/%d", localtime())
    if !isdirectory(dir)
        let retval = system("mkdir -p ".dir)
        "let user = system("id -u")
        "let group = system("id -g")
        "system("chown ".user.":".group." ".dir)
        let retval = system("chown frsyuki:staff ".dir)
        "                          ^^^^^^^^^^^^^ ここを変える
    endif
    exe "set backupdir=".dir
    let time = strftime("%H_%M_%S", localtime())
    exe "set backupext=.".time
endfunction