Report error for unsupported platform on 404

Author: pickfire

rustup-init.sh

@@ -386,6 +386,8 @@ ignore() {
 downloader() {
     local _dld
     local _ciphersuites
+    local _err
+    local _status
     if check_cmd curl; then
         _dld=curl
     elif check_cmd wget; then
@@ -400,30 +402,50 @@ downloader() {
         get_ciphersuites_for_curl
         _ciphersuites="$RETVAL"
         if [ -n "$_ciphersuites" ]; then
-            curl --proto '=https' --tlsv1.2 --ciphers "$_ciphersuites" --silent --show-error --fail --location "$1" --output "$2"
+            _err=$(curl --proto '=https' --tlsv1.2 --ciphers "$_ciphersuites" --silent --show-error --fail --location "$1" --output "$2" 2>&1)
+            _status=$?
         else
             echo "Warning: Not enforcing strong cipher suites for TLS, this is potentially less secure"
             if ! check_help_for "$3" curl --proto --tlsv1.2; then
                 echo "Warning: Not enforcing TLS v1.2, this is potentially less secure"
-                curl --silent --show-error --fail --location "$1" --output "$2"
+                _err=$(curl --silent --show-error --fail --location "$1" --output "$2" 2>&1)
+                _status=$?
             else
-                curl --proto '=https' --tlsv1.2 --silent --show-error --fail --location "$1" --output "$2"
+                _err=$(curl --proto '=https' --tlsv1.2 --silent --show-error --fail --location "$1" --output "$2" 2>&1)
+                _status=$?
             fi
         fi
+        if [ -n "$_err" ]; then
+            echo "$_err" >&2
+            if echo "$_err" | grep -q 404$; then
+                err "unsupported platform $3"
+            fi
+        fi
+        return $_status
     elif [ "$_dld" = wget ]; then
         get_ciphersuites_for_wget
         _ciphersuites="$RETVAL"
         if [ -n "$_ciphersuites" ]; then
-            wget --https-only --secure-protocol=TLSv1_2 --ciphers "$_ciphersuites" "$1" -O "$2"
+            _err=$(wget --https-only --secure-protocol=TLSv1_2 --ciphers "$_ciphersuites" "$1" -O "$2" 2>&1)
+            _status=$?
         else
             echo "Warning: Not enforcing strong cipher suites for TLS, this is potentially less secure"
             if ! check_help_for "$3" wget --https-only --secure-protocol; then
                 echo "Warning: Not enforcing TLS v1.2, this is potentially less secure"
-                wget "$1" -O "$2"
+                _err=$(wget "$1" -O "$2" 2>&1)
+                _status=$?
             else
-                wget --https-only --secure-protocol=TLSv1_2 "$1" -O "$2"
+                _err=$(wget --https-only --secure-protocol=TLSv1_2 "$1" -O "$2" 2>&1)
+                _status=$?
+            fi
+        fi
+        if [ -n "$_err" ]; then
+            echo "$_err" >&2
+            if echo "$_err" | grep -q 'ERROR 404: Not Found\.$'; then
+                err "unsupported platform $3"
             fi
         fi
+        return $_status
     else
         err "Unknown downloader"   # should not reach here
     fi