v-change-fs-file-permission

#!/bin/bash
# info: change file permission
# options: USER FILE PERMISSIONS
#
# The function changes file access permissions on the file system

user=$1
src_file=$2
permissions=$3

# Checking arguments
if [ -z "$permissions" ]; then
    echo "Usage: USER FILE PERMISSIONS"
    exit 1
fi

# Checking vesta user
if [ ! -e "$VESTA/data/users/$user" ]; then
    echo "Error: vesta user $user doesn't exist"
    exit 3
fi

# Checking user homedir
homedir=$(grep "^$user:" /etc/passwd | cut -f 6 -d :)
if [ -z $homedir ]; then
    echo "Error: user home directory doesn't exist"
    exit 12
fi

# Checking source file
if [ ! -fe "$src_file" ]; then
    echo "Error: source file doesn't exist $src_file"
    exit 3
fi

# Checking source path
rpath=$(readlink -f "$src_file")
if [ -z "$(echo $rpath |egrep "^/tmp|^$homedir")" ]; then
    echo "Error: invalid source path $src_file"
    exit 2
fi

# Changing file permissions
sudo -u $user chmod -R $permissions "$src_file" >/dev/null 2>&1
if [ $? -ne 0 ]; then
    echo "Error: access permission on $src_file was not changed"
    exit 3
fi

# Exiting
exit