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

debianutils/run_parts.c

@@ -61,6 +61,8 @@ static const struct option runparts_long_options[] = {
 	{ 0,			0,		0,			0 }
 };
 
+extern char **environ;
+
 /* run_parts_main */
 /* Process options */
 int run_parts_main(int argc, char **argv)
@@ -108,5 +110,5 @@ int run_parts_main(int argc, char **argv)
 	args[0] = argv[optind];
 	args[argcount] = 0;
 
-	return(run_parts(args, test_mode));
+	return(run_parts(args, test_mode, environ));
 }

include/libbb.h

@@ -405,7 +405,7 @@ extern void run_shell ( const char *shell, int loginshell, const char *command,
 	, security_id_t sid
 #endif
 );
-extern int run_parts(char **args, const unsigned char test_mode);
+extern int run_parts(char **args, const unsigned char test_mode, char **env);
 extern int restricted_shell ( const char *shell );
 extern void setup_environment ( const char *shell, int loginshell, int changeenv, const struct passwd *pw );
 extern int correct_password ( const struct passwd *pw );

libbb/run_parts.c

@@ -47,7 +47,7 @@ static int valid_name(const struct dirent *d)
  * test_mode = 2 means to fail siliently on missing directories
  */
 
-extern int run_parts(char **args, const unsigned char test_mode)
+extern int run_parts(char **args, const unsigned char test_mode, char **env)
 {
 	struct dirent **namelist = 0;
 	struct stat st;
@@ -92,7 +92,7 @@ extern int run_parts(char **args, const unsigned char test_mode)
 					bb_perror_msg_and_die("failed to fork");
 				} else if (!pid) {
 					args[0] = filename;
-					execv(filename, args);
+					execve(filename, args, env);
 					exec_errno = errno;
 					_exit(1);
 				}

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);
 }