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#!/bin/sh
# functions.sh
# Library of functions which pc-sysinstall may call upon for parsing the config
# which gets the value of a setting in the provided line
get_value_from_string()
{
if [ ! -z "${1}" ]
then
VAL="`echo ${1} | cut -d '=' -f 2`"
export VAL
else
echo "Error: Did we forgot to supply a string to parse?"
exit 1
fi
};
# Get the value from the cfg file including spaces
get_value_from_cfg_with_spaces()
{
if [ ! -z "${1}" ]
then
VAL=`grep "^${1}=" ${CFGF} | head -n 1 | cut -d '=' -f 2`
export VAL
else
exit_err "Error: Did we forgot to supply a setting to grab?"
fi
};
# Get the value from the cfg file
get_value_from_cfg()
{
if [ ! -z "${1}" ]
then
VAL=`grep "^${1}=" ${CFGF} | head -n 1 | cut -d '=' -f 2 | tr -d ' '`
export VAL
else
exit_err "Error: Did we forgot to supply a setting to grab?"
fi
};
# Checks the value of a setting in the provided line with supplied possibilities
# 1 = setting we are checking, 2 = list of valid values
if_check_value_exists()
{
if [ ! -z "${1}" -a ! -z "${2}" ]
then
# Get the first occurance of the setting from the config, strip out whitespace
VAL=`grep "^${1}" ${CFGF} | head -n 1 | cut -d '=' -f 2 | tr -d ' '`
if [ -z "${VAL}" ]
then
# This value doesn't exist, lets return
return 0
fi
VALID="1"
for i in ${2}
do
if [ "$VAL" = "${i}" ]
then
VALID="0"
fi
done
if [ "$VALID" = "1" ]
then
exit_err "Error: ${1} is set to unknown value $VAL"
fi
else
exit_err "Error: Did we forgot to supply a string to parse and setting to grab?"
fi
};
# Checks the value of a setting in the provided line with supplied possibilities
# 1 = setting we are checking, 2 = list of valid values
check_value()
{
if [ ! -z "${1}" -a ! -z "${2}" ]
then
# Get the first occurance of the setting from the config, strip out whitespace
VAL=`grep "^${1}" ${CFGF} | head -n 1 | cut -d '=' -f 2 | tr -d ' '`
VALID="1"
for i in ${2}
do
if [ "$VAL" = "${i}" ]
then
VALID="0"
fi
done
if [ "$VALID" = "1" ]
then
exit_err "Error: ${1} is set to unknown value $VAL"
fi
else
exit_err "Error: Did we forgot to supply a string to parse and setting to grab?"
fi
};
# Checks for the presense of the supplied arguements in the config file
# 1 = values to confirm exist
file_sanity_check()
{
if [ ! -z "$CFGF" -a ! -z "$1" ]
then
for i in $1
do
grep "^${i}=" $CFGF >/dev/null 2>/dev/null
if [ "$?" = "0" ]
then
LN=`grep "^${i}=" ${CFGF} | head -n 1 | cut -d '=' -f 2 | tr -d ' '`
if [ -z "${LN}" ]
then
echo "Error: Config fails sanity test! ${i}= is empty"
exit 1
fi
else
echo "Error: Config fails sanity test! Missing ${i}="
exit 1
fi
done
else
echo "Error: Missing config file, and / or values to sanity check for!"
exit 1
fi
};
# Function which merges the contents of a new config into the specified old one
# Only works with <val>= type configurations
merge_config()
{
OLDCFG="${1}"
NEWCFG="${2}"
FINALCFG="${3}"
# Copy our oldcfg to the new one, which will be used as basis
cp ${OLDCFG} ${FINALCFG}
# Remove blank lines from new file
cat ${NEWCFG} | sed '/^$/d' > ${FINALCFG}.tmp
# Set our marker if we've found any
FOUNDMERGE="NO"
while read newline
do
echo ${newline} | grep "^#" >/dev/null 2>/dev/null
if [ "$?" != "0" ] ; then
VAL="`echo ${newline} | cut -d '=' -f 1`"
cat ${OLDCFG} | grep ${VAL} >/dev/null 2>/dev/null
if [ "$?" != "0" ] ; then
if [ "${FOUNDMERGE}" = "NO" ] ; then
echo "" >> ${FINALCFG}
echo "# Auto-merged values from newer ${NEWCFG}" >> ${FINALCFG}
FOUNDMERGE="YES"
fi
echo "${newline}" >> ${FINALCFG}
fi
fi
done < ${FINALCFG}.tmp
rm ${FINALCFG}.tmp
};
# Loop to check for a specified mount-point in a list
check_for_mount()
{
MNTS="${1}"
FINDMNT="${2}"
# Check if we found a valid root partition
for CHECKMNT in `echo ${MNTS} | sed 's|,| |g'`
do
if [ "${CHECKMNT}" = "${FINDMNT}" ] ; then
return 0
fi
done
return 1
};
# Function which returns the next line in the specified config file
get_next_cfg_line()
{
CURFILE="$1"
CURLINE="$2"
FOUND="1"
while read line
do
if [ "$FOUND" = "0" ] ; then
VAL="$line" ; export VAL
return
fi
if [ "$line" = "${CURLINE}" ] ; then
FOUND="0"
fi
done <${CURFILE}
# Got here, couldn't find this line or at end of file, set VAL to ""
VAL="" ; export VAL
};
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