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From ccf46ebc548054f876a418fc2e949a05a74a9c2a Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 13 May 2015 16:34:02 +0200
Subject: [PATCH] core: make exec code a bit more readable
Let's add a function that checks whether we need fs namespacing, to make
things easier to read, instead of using a humungous if expression...
Cherry-picked from: 8b44a3d22c1fdfc5ce5fcb77e38a90ec02ba8019
Related: #1421181
---
src/core/execute.c | 41 +++++++++++++++++++++++++++++++----------
1 file changed, 31 insertions(+), 10 deletions(-)
diff --git a/src/core/execute.c b/src/core/execute.c
index e9b4359a7f..59340ec051 100644
--- a/src/core/execute.c
+++ b/src/core/execute.c
@@ -1256,6 +1256,36 @@ static int build_environment(
return 0;
}
+static bool exec_needs_mount_namespace(
+ const ExecContext *context,
+ const ExecParameters *params,
+ ExecRuntime *runtime) {
+
+ assert(context);
+ assert(params);
+
+ if (!strv_isempty(context->read_write_dirs) ||
+ !strv_isempty(context->read_only_dirs) ||
+ !strv_isempty(context->inaccessible_dirs))
+ return true;
+
+ if (context->mount_flags != 0)
+ return true;
+
+ if (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir))
+ return true;
+
+ if (params->bus_endpoint_path)
+ return true;
+
+ if (context->private_devices ||
+ context->protect_system != PROTECT_SYSTEM_NO ||
+ context->protect_home != PROTECT_HOME_NO)
+ return true;
+
+ return false;
+}
+
static int exec_child(
ExecCommand *command,
const ExecContext *context,
@@ -1563,16 +1593,7 @@ static int exec_child(
}
}
- if (!strv_isempty(context->read_write_dirs) ||
- !strv_isempty(context->read_only_dirs) ||
- !strv_isempty(context->inaccessible_dirs) ||
- context->mount_flags != 0 ||
- (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) ||
- params->bus_endpoint_path ||
- context->private_devices ||
- context->protect_system != PROTECT_SYSTEM_NO ||
- context->protect_home != PROTECT_HOME_NO) {
-
+ if (exec_needs_mount_namespace(context, params, runtime)) {
char *tmp = NULL, *var = NULL;
/* The runtime struct only contains the parent