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Done with Övning 5 (backup script) on Lab 5

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Jack-Benny Persson 2013-12-17 10:55:13 +01:00
parent df6cf31242
commit 362e3ed060
1 changed files with 50 additions and 9 deletions
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59
Labb5/ovning5.sh
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@ -1,6 +1,6 @@
#!/bin/bash #!/bin/bash
#Jack-Benny Persson # Jack-Benny Persson
# LX13 # LX13
# Övning 5, labb 5 # Övning 5, labb 5
# Backup-script # Backup-script
@ -8,14 +8,35 @@
# Set some variabels # Set some variabels
BackupTo="$HOME/backups/" BackupTo="$HOME/backups/"
declare Verbose declare Verbose
File="False"
Tar="/bin/tar" Tar="/bin/tar"
# Help screens # Question for overwriting existing file
short_usage() overwrite()
{ {
echo "Usage: `basename $0` -b <dir> -f <filename.tar> -o <dir> -v -h" select Overwrite in "Yes" "No"; do
case $Overwrite in
"Yes") printf "Overwriting previous file, continuing...\n"
break
;;
"No") printf "Not overwriting, halting script\n"
exit 0
;;
*) printf "Please answer 1 (yes) or 2 (no)\n"
;;
esac
done
} }
# Print short help
short_usage()
{
printf "Usage: `basename $0` -b <dir> -f <filename.tar> -o "
printf "<dir> -v -h\n"
}
# Print long help
long_usage() long_usage()
{ {
short_usage short_usage
@ -28,7 +49,7 @@ long_usage()
EOF EOF
} }
# Parse arguments and options # Parse command line arguments and options
while getopts b:f:o:vh Opt; do while getopts b:f:o:vh Opt; do
case "$Opt" in case "$Opt" in
b) BackupThis=$OPTARG b) BackupThis=$OPTARG
@ -40,25 +61,45 @@ while getopts b:f:o:vh Opt; do
v) Verbose=v v) Verbose=v
;; ;;
h) long_usage h) long_usage
exit 1
;; ;;
*) short_usage *) short_usage
exit 2
;; ;;
esac esac
done done
# Sanity checks # Sanity checks
if [ ! -w $BackupTo ] || [ ! -d $BackupTo ]; then if [ ! -w $BackupTo ] || [ ! -d $BackupTo ]; then
echo "Can't write to $BackupTo or $BackupTo doesn't exist" > /dev/stderr printf "Can't write to $BackupTo or $BackupTo doesn't exist\n" \
> /dev/stderr
exit 2 exit 2
fi fi
if [ ! -r $BackupThis ]; then if [ ! -r $BackupThis ]; then
echo "Can't read $BackupThis" printf "Can't read ${BackupThis}\n" > /dev/stderr
exit 2 exit 2
fi fi
# Main (do the actual backup) # Check if the backup file already exists
if [ "$File" != "False" ]; then
if [ -f ${BackupTo}/${File} ]; then
printf "${BackupTo}/${File} already exist, overwrite?\n"
overwrite
fi
else
if [ -f ${BackupTo}/`basename $BackupThis`.tar ]; then
printf "${BackupTo}/`basename $BackupThis`.tar already exist, "
printf "overwrite?\n"
overwrite
fi
fi
$Tar cf$Verbose ${BackupTo}/`basename $BackupThis`.tar $BackupThis # Main (do the actual backup)
if [ "$File" != "False" ]; then
$Tar cf$Verbose ${BackupTo}/${File} $BackupThis
else
$Tar cf$Verbose ${BackupTo}/`basename $BackupThis`.tar $BackupThis
fi
exit 0 exit 0