Svn 钩子 限制上传文件的大小及类型

[root@svnserver hooks]# cat  pre-commit       
#!/bin/sh
# repot && transaction arguments
REPOS="$1"
TXN="$2"
# svnlook command
SVNLOOK=/usr/bin/svnlook
# file filter: we only allow commit .c && .h files
FILTER='.(c|h)$'
# max file size in bytes after commit.
MAX_SIZE=5242880
# max change per one commit
MAX_CHANGE_LINES=50
files=$($SVNLOOK changed -t $TXN $REPOS | awk '{print $2}')
# check 
for f in $files
do
    # check file type
    if echo $f|grep -Eq $FILTER;then
        # valid file
            :
    else
        echo "File $f is not a .h or .c file" >&2
        exit 1
    fi
    # check file size
    filesize=$($SVNLOOK cat -t $TXN $REPOS $f | wc -c)
    if [ $filesize -gt $MAX_SIZE ];then
        echo "File $f is too large (must <= $MAX_SIZE)" >&2
        exit 1
    fi
    # check change lines
    changelines=$($SVNLOOK diff -t $TXN $REPOS $f | grep -E '^(+|-)' | wc -l)
    if [ $changelines -gt $MAX_CHANGE_LINES ] ; then
        echo "File $f changes too much ($changelines lines, must <= $MAX_CHANGE_LINES)" >&2
        exit 1
    fi
done
exit 0