tar: implement --version for buildroot

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

diff --git a/archival/tar.c b/archival/tar.c
index 566ba34f68718cf7b3e7c7af6448c7acebb0b37d..23ac00e866f97da6efb2c3cfcac611cd477efb00 100644 (file)
--- 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