add generate_random_salt.sh script

allows for automatic configuration of SteamIdHashSalt on Linux (or WSL)
updated the readme to reflect this

reunion/dist/Readme.tpl

@@ -24,16 +24,18 @@ INSTALLATION:
 		or this for linux
 			linux addons/reunion/reunion_mm_i386.so
 		at the beginning of the file
-	4. Copy reunion.cfg to server root or gamedir.
-	5. Start the server. When server loads, type "meta list" in console. You'll see something like this:
+	4. Enter a 16-64 length random alphanumerical string to "SteamIdHashSalt=" option in reunion.cfg.
+		Or you can use generate_random_salt.sh script to do this automatically.
+	5. Copy reunion.cfg to server root or gamedir.
+	6. Start the server. When server loads, type "meta list" in console. You'll see something like this:
 
 		Currently loaded plugins:
 		      description      stat pend  file              vers      src   load  unlod
 		 [ 1] Reunion          RUN   -    reunion_mm_i386.  v${APP_VERSION_STRD} ini   Start Never
 		 [ 2] AMX Mod X        RUN   -    amxmodx_mm_i386.  v1.8.1.3  ini   Start ANY
 		2 plugins, 2 running
-	6. If status is not "RUN", start server with "+log on +mp_logecho 1" parameters and look through console output. In 99% cases you'll find reason there.
-	7. Installation of AmxModX plugins from amxx directory is not necessary.
+	7. If status is not "RUN", start server with "+log on +mp_logecho 1" parameters and look through console output. In 99% cases you'll find reason there.
+	8. Installation of AmxModX plugins from amxx directory is not necessary.
 
 HOW TO CHANGE STEAMIDS OF CLIENTS
 	Use cid* options in AUTHID MANAGEMENT section of reunion.cfg

reunion/dist/generate_random_salt.sh

@@ -0,0 +1,124 @@
+#!/bin/sh
+
+_fail () {
+    echo $'Could not generate salt automatically.\nPlease enter a 16-64 length random alphanumerical string to "SteamIdHashSalt=" option in reunion.cfg.'
+    return 1
+}
+
+_success() {
+    if grep -e ^"SteamIdHashSalt\s*=" reunion.cfg 2>&1 >/dev/null; then
+        sed -i "s/SteamIdHashSalt\s*=.*/SteamIdHashSalt = $SALT/g" reunion.cfg 2>&1 >/dev/null
+    else
+        echo "SteamIdHashSalt = $SALT" >> reunion.cfg
+    fi
+    if ! grep ^"SteamIdHashSalt = $SALT" reunion.cfg 2>&1 >/dev/null; then
+        echo [fail]
+        _fail
+        return 1
+    fi
+    echo [ok]
+    echo "Done. \"SteamIdHashSalt = $SALT\" generated successfully and written to reunion.cfg."
+    return 0
+}
+
+SALT=
+
+if [ ! -f reunion.cfg ]; then
+    echo Error: reunion.cfg does not exist in the current directory!
+    exit 1
+fi
+
+echo -n "Testing for grep ... "
+if ! command -v wc 2>&1 >/dev/null; then
+    echo [fail]
+    _fail
+    exit 1
+fi
+echo [ok]
+
+echo -n "Testing for wc ... "
+if ! command -v wc 2>&1 >/dev/null; then
+    echo [fail]
+    _fail
+    exit 1
+fi
+echo [ok]
+
+echo -n "Testing for sed ... "
+if ! command -v sed 2>&1 >/dev/null; then
+    echo [fail]
+    _fail
+    exit 1
+fi
+echo [ok]
+
+echo -n "Testing for openssl ... "
+if command -v openssl 2>&1 >/dev/null; then
+    echo [ok]
+    echo -n "Generating salt ... "
+    SALT="$(openssl rand -hex 16)"
+    if [ "$(echo "$SALT" | wc -c)" -gt 31 ]; then
+        _success
+        exit $?
+    else
+        echo [fail]
+    fi
+else
+    echo [not found]
+fi
+
+echo -n "Testing for /dev/urandom ... "
+if [ ! -e /dev/urandom ]; then
+    echo [fail]
+    _fail
+    exit 1
+fi
+echo [ok]
+
+echo -n "Testing for hexdump ... "
+if command -v hexdump 2>&1 >/dev/null; then
+    echo [ok]
+    echo -n "Generating salt ... "
+    SALT="$(hexdump -vn16 -e'4/4 "%08x"' /dev/urandom)"
+    if [ "$(echo "$SALT" | wc -c)" -gt 31 ]; then
+        _success
+        exit $?
+    else
+        echo [fail]
+    fi
+else
+    echo [not found]
+fi
+
+echo -n "Testing for xxd ... "
+if command -v xxd 2>&1 >/dev/null; then
+    echo [ok]
+    echo -n "Generating salt ... "
+    SALT="$(xxd -l 16 -p /dev/urandom)"
+    if [ "$(echo "$SALT" | wc -c)" -gt 31 ]; then
+        _success
+        exit $?
+    else
+        echo [fail]
+    fi
+else
+    echo [not found]
+fi
+
+echo -n "Testing for tr ... "
+if command -v tr 2>&1 >/dev/null; then
+    echo [ok]
+    echo -n "Generating salt ... "
+    SALT="$(tr -dc 'a-f0-9' < /dev/urandom | head -c32)"
+    if [ "$(echo "$SALT" | wc -c)" -gt 31 ]; then
+        _success
+        exit $?
+    else
+        echo [fail]
+    fi
+else
+    echo [not found]
+fi
+_fail
+exit 1
+