The previous implementation is great if multiple different requesters call su rapidly in a very short period of time, however in the real world this is nearly impossible to happen. This comes with quite a big overhead, since it requires two lists and also an everlasting background thread to constantly maintain the lists. The new implementation will spawn a collector thread for each cache miss, and the thread will terminate itself once the data is invalidated.
77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/* su.h - Store all general su info
|
|
*/
|
|
|
|
#ifndef _SU_H_
|
|
#define _SU_H_
|
|
|
|
#include <limits.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "db.h"
|
|
#include "list.h"
|
|
|
|
#define MAGISKSU_VER_STR xstr(MAGISK_VERSION) ":MAGISKSU (topjohnwu)"
|
|
|
|
// This is used if wrapping the fragment classes and activities
|
|
// with classes in another package.
|
|
#define REQUESTOR_PREFIX JAVA_PACKAGE_NAME ".superuser"
|
|
|
|
#define DEFAULT_SHELL "/system/bin/sh"
|
|
|
|
struct su_info {
|
|
unsigned uid; /* Unique key to find su_info */
|
|
pthread_mutex_t lock; /* Internal lock */
|
|
int count; /* Just a count for debugging purpose */
|
|
|
|
/* These values should be guarded with internal lock */
|
|
struct db_settings dbs;
|
|
struct db_strings str;
|
|
struct su_access access;
|
|
struct stat manager_stat;
|
|
|
|
/* These should be guarded with global list lock */
|
|
struct list_head pos;
|
|
int ref;
|
|
int clock;
|
|
};
|
|
|
|
struct su_request {
|
|
unsigned uid;
|
|
int login;
|
|
int keepenv;
|
|
char *shell;
|
|
char *command;
|
|
};
|
|
|
|
struct su_context {
|
|
struct su_info *info;
|
|
struct su_request to;
|
|
pid_t pid;
|
|
char cwd[PATH_MAX];
|
|
char sock_path[PATH_MAX];
|
|
int pipefd[2];
|
|
};
|
|
|
|
extern struct su_context *su_ctx;
|
|
|
|
// su.c
|
|
|
|
int su_daemon_main(int argc, char **argv);
|
|
__attribute__ ((noreturn)) void exit2(int status);
|
|
void set_identity(unsigned uid);
|
|
|
|
// su_client.c
|
|
|
|
int socket_create_temp(char *path, size_t len);
|
|
int socket_accept(int serv_fd);
|
|
void socket_send_request(int fd, const struct su_context *ctx);
|
|
void socket_receive_result(int fd, char *result, ssize_t result_len);
|
|
|
|
// activity.c
|
|
|
|
void app_send_result(struct su_context *ctx, policy_t policy);
|
|
void app_send_request(struct su_context *ctx);
|
|
|
|
#endif
|