unix shell snippet for reading a ini file

时间：2007-07-26 来源：junsi

sometime you may want to read a initialization for getting some configration in a unix shell, I have write a demo, hope this useful. any suggestion, comments, bugs fix are welcome :-) in a initialization file contains one or more sections, and a section can cotains one or more items, let me show a example. [section_a] code=uu_library #some comment ver=0.01 [language] code=python ver=0.02 any charater behind '#' is comment until encounter a newline charater, but sometime a item value may have # charater, for simply, this situation is not considered. [not-support] code='#00.1' # uu shell snippet # junsi 2007 in shanghai # version 0.01 uu_tmp_filename()
{
    #function:      produce a temporary filename using process num and a rand num
    #input:         no input param
    #output:        a temporary filename in /tmp direction

    rand_num1=`awk 'BEGIN{ srand(); print int( rand() * 10000 ) }'`
    rand_num2=`awk 'BEGIN{ srand(); print int( rand() * 10000 ) }'`
    echo "/tmp/uu-$$-$rand_num1-$rand_num2"

    return 0
} uu_inifile_init()
{
    #section:       [section_name]
    #function:      write a section in a ini filename into a temporary file
    #input:         ini_filename ini_section_name
    #input:         no input param
    #output:        a temporary filename in /tmp

    [ "$#" -ne "2" ] && return 1
    [ ! -r $1 ]      && return 2
    [ "$2X" = "X" ] && return 3     uu_ini_tmp_filename=`uu_tmp_filename`
    sed -n "/[^#]*\[$2\]/,/[^#]*\[.*\]/p" $1 >$uu_ini_tmp_filename

    echo $uu_ini_tmp_filename
    return 0
} uu_inifile_read()
{
    #field:         ^fieldname=fieldvalue #value comment$
    #function:      read a field from a temporary file
    #input:         tmp_filename ini_field_name
    #input:         no input param
    #output:        a temporary filename in /tmp

    [ "$#" -ne "2" ] && return 1
    [ ! -r $1 ]      && return 2
    [ "$2X" = "X" ] && return 3     sed -n "/^$2=/p" $1 | sed -e "s/#.*$//g" | awk -F"=" '{ print $2 }' | sed 's/ //g'
    return 0
} uu_inifile_exit()
{
    #function:      remove a temp filename
    #input:         a temporary filename
    #output:        no output

    [ "$#" -ne "1" ] && return 1
    [ ! -r $1 ]      && return 2
    rm -f "$1"

    return 0
} # some test code
tmpf=`uu_inifile_init /tmp/t.ini section_c`
echo $tmpf tmpv=`uu_inifile_read $tmpf ip`
echo -e "ip = $tmpv\n"
tmpv=`uu_inifile_read $tmpf x`
echo -e "x = $tmpv\n" uu_inifile_exit $tmpf