@@ -14,9 +14,11 @@ manually updated, which means they may be out of date.

 ## Usage

 ```

-distro-url [guess] [<distro> [<variant> [<arch> [<codename> [<version> [<mirror>]]]]]]

+distro-url [query] [guess] [<distro> [<variant> [<arch> [<codename> [<version> [<mirror>]]]]]]

 ```

+-   `query`: Optional verbatim string, turning on query mode which will query

+    the [mirror][]s for each [URL][] to check that they are valid.

 -   `guess`: Optional verbatim string, switching from the default filter mode

     to guess mode. Filter mode interprets the rest of the parameters as

     [glob][]s (defaulting to `*`, matching everything) to filter an internal

@@ -35,6 +37,7 @@ distro-url [guess] [<distro> [<variant> [<arch> [<codename> [<version> [<mirror>

 -   [POSIX][] [shell][].

 -   `column`, optional, for formatting.

+-   `curl`, optional, for query mode.

 [POSIX]: https://en.wikipedia.org/wiki/POSIX

 [shell]: https://en.wikipedia.org/wiki/Unix_shell

@@ -58,9 +61,9 @@ ubuntu    desktop-raspi  arm64  resolute  26.04    https://cdimage.ubuntu.com/ub

 ubuntu    server-raspi   arm64  resolute  26.04    https://cdimage.ubuntu.com/ubuntu/releases/resolute/release/ubuntu-26.04-preinstalled-server-arm64+raspi.img.xz

 edubuntu  desktop-raspi  arm64  resolute  26.04    https://cdimage.ubuntu.com/edubuntu/releases/resolute/release/edubuntu-26.04-preinstalled-desktop-arm64+raspi.img.xz

-$ distro-url guess debian inst arm64 unknown 99.0.0

-DISTRO  VARIANT  ARCH   CODENAME  VERSION  URL

-debian  inst     arm64  unknown   99.0.0   https://cdimage.debian.org/debian-cd/99.0.0/arm64/iso-dvd/debian-99.0.0-arm64-DVD-1.iso

+$ distro-url query guess debian inst arm64 unknown 99.0.0

+DISTRO  VARIANT  ARCH   CODENAME  VERSION  URL                                                                                      QUERY

+debian  inst     arm64  unknown   99.0.0   https://cdimage.debian.org/debian-cd/99.0.0/arm64/iso-dvd/debian-99.0.0-arm64-DVD-1.iso  ERR

 ```

 ## License

@@ -1,13 +1,14 @@

 #!/bin/sh

 set -euC

-# usage: distro-url [guess] [<distro> [<variant> [<arch> [<codename> [<version> [<mirror>]]]]]]

+# usage: distro-url [query] [guess] [<distro> [<variant> [<arch> [<codename> [<version> [<mirror>]]]]]]

 main()

 {

+  [ "${1:-}" = 'query' ] && shift && query='QUERY' || query=

   [ "${1:-}" = 'guess' ] && shift && guess='GUESS' || guess=

   {

-    echo 'DISTRO' 'VARIANT' 'ARCH' 'CODENAME' 'VERSION' 'URL'

+    echo 'DISTRO' 'VARIANT' 'ARCH' 'CODENAME' 'VERSION' 'URL' $query

     [ "$guess" ] \

       && guess  "$@" \

       || filter "$@"

@@ -16,7 +17,21 @@ main()

     [ "$(command -v column)" ] \

       && column -t \

       || cat

-  }

+  } \

+  | while IFS= read -r line

+  do

+    printf '%s' "$line"

+    set -- $line

+    [ "$query" ] && [ "$6" != 'URL' ] && query "$6"

+    printf '\n'

+  done

+}

+

+query()

+{

+  curl -sfI "$1" > '/dev/null' \

+    && printf '%s' 'OK' \

+    || printf '%s' 'ERR'

 }

 filter()