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Get random separately

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This commit is contained in:
topjohnwu 2023-04-03 18:20:12 -07:00 committed by John Wu
parent 46ce765860
commit 2087e47300
3 changed files with 10 additions and 3 deletions
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7
native/src/base/misc.cpp
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@ -33,7 +33,7 @@ int fork_no_orphan() {
return 0;
}
int gen_rand_str(char *buf, int len, const void *seed_buf, bool varlen) {
mt19937_64 &get_rand(const void *seed_buf) {
static mt19937_64 gen([&] {
mt19937_64::result_type seed;
if (seed_buf == nullptr) {
@ -45,6 +45,11 @@ int gen_rand_str(char *buf, int len, const void *seed_buf, bool varlen) {
}
return seed;
}());
return gen;
}
int gen_rand_str(char *buf, int len, bool varlen) {
auto gen = get_rand();
if (len == 0)
return 0;

4
native/src/base/misc.hpp
View File

@ -5,6 +5,7 @@
#include <functional>
#include <string_view>
#include <bitset>
#include <random>
#include <base-rs.hpp>
@ -159,7 +160,8 @@ void init_argv0(int argc, char **argv);
void set_nice_name(const char *name);
uint32_t binary_gcd(uint32_t u, uint32_t v);
int switch_mnt_ns(int pid);
int gen_rand_str(char *buf, int len, const void *seed_buf = nullptr, bool varlen = true);
std::mt19937_64 &get_rand(const void *seed_buf = nullptr);
int gen_rand_str(char *buf, int len, bool varlen = true);
std::string &replace_all(std::string &str, std::string_view from, std::string_view to);
std::vector<std::string> split(const std::string &s, const std::string &delims);
std::vector<std::string_view> split_ro(std::string_view, std::string_view delims);

2
native/src/init/rootdir.cpp
View File

@ -209,7 +209,7 @@ void MagiskInit::parse_config_file() {
}
return true;
});
gen_rand_str(nullptr, 0, &seed);
get_rand(&seed);
}
#define ROOTMIR MIRRDIR "/system_root"