Get API level from build.prop

native/jni/daemon/bootstages.cpp

@@ -32,6 +32,7 @@ static vector<string> module_list;
 static bool seperate_vendor;
 
 char *system_block, *vendor_block, *magiskloop;
+int SDK_INT = -1;
 
 static int bind_mount(const char *from, const char *to);
 extern void auto_start_magiskhide();
@@ -436,19 +437,25 @@ static bool magisk_env() {
 	xmkdir(SECURE_DIR "/post-fs-data.d", 0755);
 	xmkdir(SECURE_DIR "/service.d", 0755);
 
-	auto sdk_prop = getprop("ro.build.version.sdk");
-	int sdk = sdk_prop.empty() ? -1 : atoi(sdk_prop.c_str());
+	parse_prop_file("/system/build.prop", [](auto key, auto val) -> bool {
+		if (strcmp(key, "ro.build.version.sdk") == 0) {
+			LOGI("* Device API level: %s\n", val);
+			SDK_INT = atoi(val);
+			return false;
+		}
+		return true;
+	});
 
 	LOGI("* Mounting mirrors");
 	auto mounts = file_to_vector("/proc/mounts");
 	bool system_as_root = false;
 	for (auto &line : mounts) {
-		if (line.find(" /system_root ") != string::npos) {
+		if (str_contains(line, " /system_root ")) {
 			bind_mount("/system_root/system", MIRRDIR "/system");
 			sscanf(line.c_str(), "%s", buf);
 			system_block = strdup2(buf);
 			system_as_root = true;
-		} else if (!system_as_root && line.find(" /system ") != string::npos) {
+		} else if (!system_as_root && str_contains(line, " /system ")) {
 			sscanf(line.c_str(), "%s %*s %s", buf, buf2);
 			system_block = strdup2(buf);
 			xmount(system_block, MIRRDIR "/system", buf2, MS_RDONLY, nullptr);
@@ -457,7 +464,7 @@ static bool magisk_env() {
 #else
 			LOGI("mount: %s\n", MIRRDIR "/system");
 #endif
-		} else if (line.find(" /vendor ") != string::npos) {
+		} else if (str_contains(line, " /vendor ")) {
 			seperate_vendor = true;
 			sscanf(line.c_str(), "%s %*s %s", buf, buf2);
 			vendor_block = strdup2(buf);
@@ -468,9 +475,8 @@ static bool magisk_env() {
 #else
 			LOGI("mount: %s\n", MIRRDIR "/vendor");
 #endif
-		} else if (sdk >= 24 &&
-		line.find(" /proc ") != string::npos &&
-		line.find("hidepid=2") == string::npos) {
+		} else if (SDK_INT >= 24 &&
+		str_contains(line, " /proc ") && !str_contains(line, "hidepid=2")) {
 			// Enforce hidepid
 			xmount(nullptr, "/proc", nullptr, MS_REMOUNT, "hidepid=2,gid=3009");
 		}
@@ -835,7 +841,7 @@ void post_fs_data(int client) {
 		snprintf(buf, PATH_MAX, "%s/%s/system.prop", MOUNTPOINT, module);
 		if (access(buf, F_OK) == 0) {
 			LOGI("%s: loading [system.prop]\n", module);
-			load_prop_file(buf, 0);
+			load_prop_file(buf, false);
 		}
 		// Check whether enable auto_mount
 		snprintf(buf, PATH_MAX, "%s/%s/auto_mount", MOUNTPOINT, module);

native/jni/include/magisk.h

@@ -39,6 +39,7 @@
 #define MAGISKHIDE_PROP     "persist.magisk.hide"
 
 extern char *argv0;     /* For changing process name */
+extern int SDK_INT;
 
 #define applet_names ((const char *[]) { "magisk", "su", "resetprop", "magiskhide", "imgtool", nullptr })
 #define init_applet  ((const char *[]) { "magiskpolicy", "supolicy", nullptr })

native/jni/include/resetprop.h

@@ -4,10 +4,12 @@
 #pragma once
 
 #include <string>
+#include <functional>
 
 int prop_exist(const char *name);
 int setprop(const char *name, const char *value, bool trigger = true);
 std::string getprop(const char *name, bool persist = false);
 void getprop(void (*callback)(const char *, const char *, void *), void *cookie, bool persist = false);
 int deleteprop(const char *name, bool persist = false);
+int parse_prop_file(const char *filename, const std::function<bool (const char *, const char *)> &cb);
 int load_prop_file(const char *filename, bool trigger = true);

native/jni/resetprop/resetprop.cpp

@@ -206,47 +206,53 @@ int deleteprop(const char *name, bool persist) {
 	return __system_property_del(name) && !(persist && strncmp(name, "persist.", 8) == 0);
 }
 
-int load_prop_file(const char *filename, bool trigger) {
-	if (init_resetprop()) return -1;
-	LOGD("resetprop: Load prop file [%s]\n", filename);
+int parse_prop_file(const char *filename, const function<bool (const char *, const char *)> &cb) {
+	LOGD("resetprop: Parse prop file [%s]\n", filename);
 	FILE *fp = xfopen(filename, "re");
 	if (fp == nullptr) {
 		LOGE("Cannot open [%s]\n", filename);
 		return 1;
 	}
-	char *line = nullptr, *pch;
+	char *line = nullptr, *eql;
 	size_t len;
 	ssize_t read;
-	int comment = 0, i;
+	int i;
 	while ((read = getline(&line, &len, fp)) != -1) {
 		// Remove the trailing newline
 		if (line[read - 1] == '\n') {
-			line[read - 1] = '\0';
-			--read;
+			line[--read] = '\0';
 		}
-		comment = 0;
+		bool comment = false;
 		for (i = 0; i < read; ++i) {
 			// Ignore starting spaces
 			if (line[i] == ' ') continue;
-			else {
 			// A line starting with # is ignored
-				if (line[i] == '#') comment = 1;
+			if (line[i] == '#') comment = true;
 			break;
 		}
-		}
 		if (comment) continue;
-		pch = strchr(line, '=');
+		eql = strchr(line, '=');
 		// Ignore invalid formats
-		if ( ((pch == nullptr) || (i >= (pch - line))) || (pch >= line + read - 1) ) continue;
+		if ( ((eql == nullptr) || (i >= (eql - line))) || (eql >= line + read - 1) )
+			continue;
 		// Separate the string
-		*pch = '\0';
-		setprop(line + i, pch + 1, trigger);
+		*eql = '\0';
+		if (!cb(line + i, eql + 1))
+			break;
 	}
 	free(line);
 	fclose(fp);
 	return 0;
 }
 
+int load_prop_file(const char *filename, bool trigger) {
+	if (init_resetprop()) return -1;
+	return parse_prop_file(filename, [=](auto key, auto val) -> bool {
+		setprop(key, val, trigger);
+		return true;
+	});
+}
+
 int resetprop_main(int argc, char *argv[]) {
 	log_cb.d = [](auto fmt, auto ap) -> int { return verbose ? vfprintf(stderr, fmt, ap) : 0; };