tar: implement --version for buildroot

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/archival/tar.c b/archival/tar.c
index 566ba34f6..23ac00e86 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -992,6 +992,15 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
         applet_long_options = tar_longopts;
 #endif
 #if ENABLE_DESKTOP
+        /* Lie to buildroot when it starts asking stupid questions. */
+        if (argv[1] && strcmp(argv[1], "--version") == 0) {
+                // Output of 'tar --version' examples:
+                // tar (GNU tar) 1.15.1
+                // tar (GNU tar) 1.25
+                // bsdtar 2.8.3 - libarchive 2.8.3
+                puts("tar (busybox) " BB_VER);
+                return 0;
+        }
         if (argv[1] && argv[1][0] != '-') {
                 /* Compat:
                  * 1st argument without dash handles options with parameters