#!/bin/csh -f
# BackupBritaTo1TB
# -----------------------------------------------------------------------------
# Shell script to backup all Brita's files
# -----------------------------------------------------------------------------

# Determine whether USB is found, prompting user to plug it in.
if (! -d /Volumes/Backup1TB/backup/brita) then
    echo "Can't find Backup1TB USB drive.  Must be plugged in."
    echo -n "Hit RETURN to exit " > /dev/tty
    set answer=$<
    exit 1
endif

# rsync options:
# -r = Recursive
# -v = Verbose
# -u = Only newer files.  Default is all newer and older files, but not 
#      files with the same time.
# -l = Preserve symbolic links, even those pointing outside the copied tree
# -t = Preserve times
# -p = Preserve permissions (Ignored when copying to USB FAT32 drive)
# -o = Preserve owner       (Ignored when copying to USB FAT32 drive)
# -g = Preserve group       (Ignored when copying to USB FAT32 drive)
# --modify-window=1 = Treat times as the same even if they differ by as much
#                     as 1 second.  Necessary when backing up to FAT or FAT32
#                     formatted USB drive, where times are always rounded 
#                     down to the nearest even-numbered second, so many files
#                     would seem newer on the regular hard drive than on the
#                     USB drive and would always be re-copied.
# --stats           = Show detailed stats after the copy, like:
#                       Number of files: 47
#                       Number of files transferred: 0
#                       Total file size: 87207 bytes
#                       Total transferred file size: 0 bytes
#                       Literal data: 0 bytes
#                       Matched data: 0 bytes
#                       File list size: 789
#                       File list generation time: 0.001 seconds
#                       File list transfer time: 0.000 seconds
#                       Total bytes sent: 805
#                       Total bytes received: 20
# --del             = Delete files from destination if missing from source
rsync -rvltpog --modify-window=1 --stats --del ~/brita/ /Volumes/Backup1TB/backup/brita

echo -n "Hit RETURN to exit" > /dev/tty
set answer=$<