Bruno Randolf writes:

this patch fixes run_parts when it's called by ifupdown. 1) argv has to be a
NULL terminated char* array, not just a string. 2) run_parts now explicitly
sets the environment. this environment is populated from the
/etc/network/interfaces config file and is needed by the scripts in
/etc/network/if-pre-up.d/. when run-parts is called from the command line the
environment is taken from the current process.


Vladimir Oleynik then wrote:

You can simplify this if use:

+       bb_xasprintf(&buf[0], "/etc/network/if-%s.d", opt);
+       buf[1] = NULL;
+
+       run_parts(&buf, 2, environ);
+       free(buf[0]);

--w
vodz

networking/ifupdown.c

@@ -1019,7 +1019,7 @@ static int doit(char *str)
 static int execute_all(struct interface_defn_t *ifd, execfn *exec, const char *opt)
 {
 	int i;
-	char *buf;
+	char *buf[2];
 
 	for (i = 0; i < ifd->n_options; i++) {
 		if (strcmp(ifd->option[i].name, opt) == 0) {
@@ -1029,10 +1029,11 @@ static int execute_all(struct interface_defn_t *ifd, execfn *exec, const char *o
 		}
 	}
 
-	buf = xmalloc(bb_strlen(opt) + 19);
-	sprintf(buf, "/etc/network/if-%s.d", opt);
-	run_parts(&buf, 2);
-	free(buf);
+	bb_xasprintf(&buf[0], "/etc/network/if-%s.d", opt);
+	buf[1] = NULL;
+
+	run_parts(&buf, 2, environ);
+	free(buf[0]);
 	return (1);
 }