load agps data through modem manager

load_agps_data.sh

#!/bin/bash
CURRENTDIR=$(pwd)
AGPS_URL='http://xtrapath1.izatcloud.net/xtra3gr.bin'
AGPS_FILENAME='xtra3gr.bin'

#Verifies if a provided local filename exists. 1=YES 0=NO
#Has one parameter: $1 = Name of the local file
file_exists(){
local DOES_EXIST=0
local FILENAME="$CURRENTDIR/$1"
[ ! -z "$1" ] && DOES_EXIST=1 || DOES_EXIST=0
if [ $DOES_EXIST -gt 0 ]; then
if [ -f "$FILENAME" ]; then
DOES_EXIST=1
else
DOES_EXIST=0
fi
fi
return $DOES_EXIST
}

#Clears old AGPS files, and downloads a fresh copy
#Has no parameters
get_agps_data(){
local IS_SUCCESS=0
echo '========================================='
echo 'Downloading AGPS DATA'
echo '========================================='
file_exists "$AGPS_FILENAME"
if [ $? -gt 0 ]; then
echo '- clearing agps file'
rm "$AGPS_FILENAME"
else
echo '- no existing agps file to clear'
fi
echo '- downloading file'
wget "$AGPS_URL"
if [ $? -eq 0 ]; then
echo '- WGET was successful'
file_exists "$AGPS_FILENAME"
if [ $? -gt 0 ]; then
echo '- got the agps file'
IS_SUCCESS=1
else
echo '- failed to get fresh copy of agps file'
fi
fi
return $IS_SUCCESS
}

#Takes the local AGPS file, and loads it into the modem
#Has one parameter: $1 = Name of the local AGPS file
set_agps_data(){
local IS_SUCCESS=0
local FILENAME="$CURRENTDIR/$1"
echo '========================================='
echo 'Uploading AGPS DATA to MODEM'
echo '========================================='
if [ ! -z "$1" ]; then
file_exists "$AGPS_FILENAME"
if [ $? -gt 0 ]; then
mmcli -G DEBUG
mmcli -m any --location-inject-assistance-data="$FILENAME"
if [ $? -eq 0 ]; then
echo '- AGPS data upload successful!'
IS_SUCCESS=1
else
echo '- AGPS data upload was a failure'
fi
else
echo '- file does not exist to upload'
fi
else
echo '- no filename given to upload'
fi
return $IS_SUCCESS
}

#The actual start of the script
get_agps_data
if [ $? -eq 0 ]; then
exit 0
fi
set_agps_data "$AGPS_FILENAME"
if [ $? -eq 0 ]; then
exit 0
fi