handle TINYCOMPRESS_PLUGIN_DIR environment variable

The path specified in environment variable TINYCOMPRESS_PLUGIN_DIR
can be used to modify the build-in path at runtime.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/src/lib/compress.c b/src/lib/compress.c
index f27374455f19cc1fe370fc0500c1c23c361769a6..68f1b55c710319cc2f08b97a967ac91b3660c9d5 100644 (file)
--- a/src/lib/compress.c
+++ b/src/lib/compress.c
@@ -117,11 +117,16 @@ static int populate_compress_plugin_ops(struct compress *compress, const char *n
        char lib_name[128];
        void *dl_hdl;
        const char *err = NULL;
+       const char *s;
 
        token = strdup(name);
        compr_name = strtok_r(token, ":", &token_saveptr);
 
-       snprintf(lib_name, sizeof(lib_name), "%slibtinycompress_module_%s.so", TINYCOMPRESS_PLUGIN_DIR, compr_name);
+       s = getenv("TINYCOMPRESS_PLUGIN_DIR");
+       if (s == NULL)
+               s = TINYCOMPRESS_PLUGIN_DIR;
+
+       snprintf(lib_name, sizeof(lib_name), "%slibtinycompress_module_%s.so", s, compr_name);
 
        free(token);
        dl_hdl = dlopen(lib_name, RTLD_NOW);