Implement policy lookups

1 files changed, 54 insertions, 0 deletions

diff --git a/sway/security.c b/sway/security.c
new file mode 100644
index 00000000..c72d54f6
--- /dev/null
+++ b/sway/security.c
@@ -0,0 +1,54 @@
+#include <unistd.h>
+#include <stdio.h>
+#include "sway/config.h"
+#include "sway/security.h"
+#include "log.h"
+
+enum secure_feature get_feature_policy(pid_t pid) {
+	const char *fmt = "/proc/%d/exe";
+	int pathlen = snprintf(NULL, 0, fmt, pid);
+	char *path = malloc(pathlen + 1);
+	snprintf(path, pathlen + 1, fmt, pid);
+	static char link[2048];
+
+	enum secure_feature default_policy =
+		FEATURE_FULLSCREEN | FEATURE_KEYBOARD | FEATURE_MOUSE;
+
+	ssize_t len = readlink(path, link, sizeof(link));
+	if (len < 0) {
+		sway_log(L_INFO,
+			"WARNING: unable to read %s for security check. Using default policy.",
+			path);
+		strcpy(link, "*");
+	} else {
+		link[len] = '\0';
+	}
+
+	for (int i = 0; i < config->feature_policies->length; ++i) {
+		struct feature_policy *policy = config->feature_policies->items[i];
+		if (strcmp(policy->program, "*")) {
+			default_policy = policy->features;
+		}
+		if (strcmp(policy->program, link) == 0) {
+			return policy->features;
+		}
+	}
+
+	return default_policy;
+}
+
+enum command_context get_command_policy(const char *cmd) {
+	enum command_context default_policy = CONTEXT_ALL;
+
+	for (int i = 0; i < config->command_policies->length; ++i) {
+		struct command_policy *policy = config->command_policies->items[i];
+		if (strcmp(policy->command, "*")) {
+			default_policy = policy->context;
+		}
+		if (strcmp(policy->command, cmd) == 0) {
+			return policy->context;
+		}
+	}
+
+	return default_policy;
+}