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From ccf46ebc548054f876a418fc2e949a05a74a9c2a Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Wed, 13 May 2015 16:34:02 +0200
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Subject: [PATCH] core: make exec code a bit more readable
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Let's add a function that checks whether we need fs namespacing, to make
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things easier to read, instead of using a humungous if expression...
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Cherry-picked from: 8b44a3d22c1fdfc5ce5fcb77e38a90ec02ba8019
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Related: #1421181
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---
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src/core/execute.c | 41 +++++++++++++++++++++++++++++++----------
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1 file changed, 31 insertions(+), 10 deletions(-)
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diff --git a/src/core/execute.c b/src/core/execute.c
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index e9b4359..59340ec 100644
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--- a/src/core/execute.c
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+++ b/src/core/execute.c
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@@ -1256,6 +1256,36 @@ static int build_environment(
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return 0;
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}
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+static bool exec_needs_mount_namespace(
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+ const ExecContext *context,
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+ const ExecParameters *params,
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+ ExecRuntime *runtime) {
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+
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+ assert(context);
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+ assert(params);
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+
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+ if (!strv_isempty(context->read_write_dirs) ||
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+ !strv_isempty(context->read_only_dirs) ||
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+ !strv_isempty(context->inaccessible_dirs))
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+ return true;
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+
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+ if (context->mount_flags != 0)
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+ return true;
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+
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+ if (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir))
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+ return true;
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+
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+ if (params->bus_endpoint_path)
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+ return true;
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+
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+ if (context->private_devices ||
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+ context->protect_system != PROTECT_SYSTEM_NO ||
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+ context->protect_home != PROTECT_HOME_NO)
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+ return true;
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+
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+ return false;
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+}
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+
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static int exec_child(
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ExecCommand *command,
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const ExecContext *context,
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@@ -1563,16 +1593,7 @@ static int exec_child(
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}
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}
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- if (!strv_isempty(context->read_write_dirs) ||
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- !strv_isempty(context->read_only_dirs) ||
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- !strv_isempty(context->inaccessible_dirs) ||
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- context->mount_flags != 0 ||
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- (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) ||
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- params->bus_endpoint_path ||
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- context->private_devices ||
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- context->protect_system != PROTECT_SYSTEM_NO ||
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- context->protect_home != PROTECT_HOME_NO) {
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-
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+ if (exec_needs_mount_namespace(context, params, runtime)) {
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char *tmp = NULL, *var = NULL;
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/* The runtime struct only contains the parent
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