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Refactor resetprop

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topjohnwu 2017-10-10 02:04:50 +08:00
parent 78a3d36ccc
commit e645c6e465
4 changed files with 295 additions and 190 deletions
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6
jni/include/resetprop.h
View File

@ -12,9 +12,11 @@ int prop_exist(const char *name);
int setprop(const char *name, const char *value); int setprop(const char *name, const char *value);
int setprop2(const char *name, const char *value, const int trigger); int setprop2(const char *name, const char *value, const int trigger);
char *getprop(const char *name); char *getprop(const char *name);
int deleteprop(const char *name, const int trigger); char *getprop2(const char *name, int persist);
int deleteprop(const char *name);
int deleteprop2(const char *name, const int persist);
int read_prop_file(const char* filename, const int trigger); int read_prop_file(const char* filename, const int trigger);
void getprop_all(void (*cbk)(const char *name)); void getprop_all(void (*callback)(const char*, const char*));
#ifdef __cplusplus #ifdef __cplusplus
} }

4
jni/magiskhide/hide_utils.c
View File

@ -58,9 +58,9 @@ void hide_sensitive_props() {
} }
} }
static void rm_magisk_prop(const char *name) { static void rm_magisk_prop(const char *name, const char *value) {
if (strstr(name, "magisk")) { if (strstr(name, "magisk")) {
deleteprop(name, 0); deleteprop2(name, 0);
} }
} }

4
jni/magiskhide/magiskhide.c
View File

@ -55,7 +55,7 @@ void launch_magiskhide(int client) {
hideEnabled = 1; hideEnabled = 1;
LOGI("* Starting MagiskHide\n"); LOGI("* Starting MagiskHide\n");
deleteprop(MAGISKHIDE_PROP, 1); deleteprop2(MAGISKHIDE_PROP, 1);
hide_sensitive_props(); hide_sensitive_props();
@ -102,7 +102,7 @@ void stop_magiskhide(int client) {
hideEnabled = 0; hideEnabled = 0;
setprop(MAGISKHIDE_PROP, "0"); setprop(MAGISKHIDE_PROP, "0");
// Remove without actually removing persist props // Remove without actually removing persist props
deleteprop(MAGISKHIDE_PROP, 0); deleteprop2(MAGISKHIDE_PROP, 0);
pthread_kill(proc_monitor_thread, SIGUSR1); pthread_kill(proc_monitor_thread, SIGUSR1);
write_int(client, DAEMON_SUCCESS); write_int(client, DAEMON_SUCCESS);

471
jni/resetprop/resetprop.cpp
View File

@ -56,249 +56,352 @@
#include <unistd.h> #include <unistd.h>
#include <fcntl.h> #include <fcntl.h>
#include <string.h> #include <string.h>
#include <dirent.h>
#include <sys/types.h> #include <sys/types.h>
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_ #define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include "_system_properties.h" #include "_system_properties.h"
#include "system_properties.h" #include "system_properties.h"
#include "magisk.h" #include "magisk.h"
#include "resetprop.h" #include "resetprop.h"
extern "C" {
#include "vector.h"
}
#define PRINT_D(...) { LOGD(__VA_ARGS__); if (verbose) printf(__VA_ARGS__); } #define PRINT_D(...) { LOGD(__VA_ARGS__); if (verbose) fprintf(stderr, __VA_ARGS__); }
#define PRINT_E(...) { LOGE(__VA_ARGS__); fprintf(stderr, __VA_ARGS__); } #define PRINT_E(...) { LOGE(__VA_ARGS__); fprintf(stderr, __VA_ARGS__); }
#define PERSISTENT_PROPERTY_DIR "/data/property" #define PERSISTENT_PROPERTY_DIR "/data/property"
static int verbose = 0; static int verbose = 0;
static bool is_legal_property_name(const char *name, size_t namelen) { static int check_legal_property_name(const char *name) {
int namelen = strlen(name);
if (namelen < 1) return false; if (namelen < 1) goto illegal;
if (name[0] == '.') return false; if (name[0] == '.') goto illegal;
if (name[namelen - 1] == '.') return false; if (name[namelen - 1] == '.') goto illegal;
/* Only allow alphanumeric, plus '.', '-', '@', ':', or '_' */ /* Only allow alphanumeric, plus '.', '-', '@', ':', or '_' */
/* Don't allow ".." to appear in a property name */ /* Don't allow ".." to appear in a property name */
for (size_t i = 0; i < namelen; i++) { for (size_t i = 0; i < namelen; i++) {
if (name[i] == '.') { if (name[i] == '.') {
// i=0 is guaranteed to never have a dot. See above. // i=0 is guaranteed to never have a dot. See above.
if (name[i-1] == '.') return false; if (name[i-1] == '.') goto illegal;
continue; continue;
} }
if (name[i] == '_' || name[i] == '-' || name[i] == '@' || name[i] == ':') continue; if (name[i] == '_' || name[i] == '-' || name[i] == '@' || name[i] == ':') continue;
if (name[i] >= 'a' && name[i] <= 'z') continue; if (name[i] >= 'a' && name[i] <= 'z') continue;
if (name[i] >= 'A' && name[i] <= 'Z') continue; if (name[i] >= 'A' && name[i] <= 'Z') continue;
if (name[i] >= '0' && name[i] <= '9') continue; if (name[i] >= '0' && name[i] <= '9') continue;
return false; goto illegal;
} }
return true; return 0;
illegal:
PRINT_E("Illegal property name: [%s]\n", name);
return 1;
} }
static int usage(char* arg0) { static int usage(char* arg0) {
fprintf(stderr, fprintf(stderr,
"resetprop v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu & nkk71) - System Props Modification Tool\n\n" "resetprop v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu & nkk71) - System Props Modification Tool\n\n"
"Usage: %s [options] [args...]\n" "Usage: %s [flags] [options...]\n"
"\n" "\n"
"Options:\n" "Options:\n"
" -v show verbose output\n" " -h, --help show this message\n"
" -n only modify property in memory\n" " (no arguments) print all properties\n"
"\n" " NAME get property\n"
"%s NAME VALUE set property entry NAME with VALUE\n" " NAME VALUE set property entry NAME with VALUE\n"
"%s --file FILE load props from FILE\n" " --file FILE load props from FILE\n"
"%s --delete NAME remove prop entry NAME\n" " --delete NAME delete property\n"
"\n" "\n"
"Flags:\n"
" -v print verbose output to stderr\n"
" -n set properties without init triggers\n"
" only affects setprop\n"
" -p access actual persist storage\n"
" only affects getprop and deleteprop\n"
"\n"
, arg0, arg0, arg0, arg0); , arg0);
return 1; return 1;
} }
static int init_resetprop() { static int init_resetprop() {
if (__system_properties_init2()) { if (__system_properties_init2()) {
PRINT_E("resetprop: Initialize error\n"); PRINT_E("resetprop: Initialize error\n");
return -1; return -1;
} }
return 0; return 0;
} }
int prop_exist(const char *name) { int prop_exist(const char *name) {
if (init_resetprop()) return 0; if (init_resetprop()) return 0;
return __system_property_find2(name) != NULL; return __system_property_find2(name) != NULL;
} }
static void read_prop_info(void* cookie, const char *name, const char *value, uint32_t serial) { static void read_prop_info(void* cookie, const char *name, const char *value, uint32_t serial) {
strcpy((char *) cookie, value); strcpy((char *) cookie, value);
}
char *getprop(const char *name) {
return getprop2(name, 0);
} }
// Get prop by name, return string (should free manually!) // Get prop by name, return string (should free manually!)
char *getprop(const char *name) { char *getprop2(const char *name, int persist) {
if (init_resetprop()) return NULL; if (check_legal_property_name(name))
const prop_info *pi = __system_property_find2(name); return NULL;
if (pi == NULL) { char value[PROP_VALUE_MAX];
PRINT_D("resetprop: prop [%s] does not exist\n", name); if (init_resetprop()) return NULL;
return NULL; const prop_info *pi = __system_property_find2(name);
} if (pi == NULL) {
char value[PROP_VALUE_MAX]; if (persist && strncmp(name, "persist.", 8) == 0) {
__system_property_read_callback2(pi, read_prop_info, value); // Try to read from file
PRINT_D("resetprop: getprop [%s]: [%s]\n", name, value); char path[PATH_MAX];
return strdup(value); snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
int fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd < 0) goto no_prop;
PRINT_D("resetprop: read prop from [%s]\n", path);
size_t len = read(fd, value, sizeof(value));
value[len] = '\0'; // Null terminate the read value
} else {
no_prop:
PRINT_D("resetprop: prop [%s] does not exist\n", name);
return NULL;
}
} else {
__system_property_read_callback2(pi, read_prop_info, value);
}
PRINT_D("resetprop: getprop [%s]: [%s]\n", name, value);
return strdup(value);
} }
static void (*cb)(const char *); struct wrapper {
void (*func)(const char *, const char *);
};
static void run_actual_cb(void* cookie, const char *name, const char *value, uint32_t serial) { static void cb_wrapper(void* cookie, const char *name, const char *value, uint32_t serial) {
cb(name); ((wrapper *) cookie)->func(name, value);
} }
static void prop_foreach_cb(const prop_info* pi, void* cookie) { static void prop_foreach_cb(const prop_info* pi, void* cookie) {
__system_property_read_callback2(pi, run_actual_cb, NULL); __system_property_read_callback2(pi, cb_wrapper, cookie);
} }
void getprop_all(void (*cbk)(const char *name)) { class property {
if (init_resetprop()) return; public:
cb = cbk; property(const char *n, const char *v) {
__system_property_foreach2(prop_foreach_cb, NULL); name = strdup(n);
value = strdup(v);
}
~property() {
free((void *)name);
free((void *)value);
}
const char *name;
const char *value;
};
vector prop_list;
static int prop_cmp(const void *p1, const void *p2) {
return strcmp((*((property **) p1))->name, (*((property **) p2))->name);
}
static void print_all_props_cb(const char *name, const char *value) {
vec_push_back(&prop_list, new property(name, value));
}
static void print_all_props(int persist) {
void *p;
vec_init(&prop_list);
getprop_all(print_all_props_cb);
if (persist) {
// Check all persist props in data
DIR *dir = opendir(PERSISTENT_PROPERTY_DIR);
struct dirent *entry;
while ((entry = readdir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0 )
continue;
int found = 0;
vec_for_each(&prop_list, p) {
if (strcmp(((property *) p)->name, entry->d_name) == 0) {
found = 1;
break;
}
}
if (!found)
vec_push_back(&prop_list, new property(entry->d_name, getprop2(entry->d_name, 1)));
}
}
vec_sort(&prop_list, prop_cmp);
vec_for_each(&prop_list, p) {
printf("[%s]: [%s]\n", ((property *) p)->name, ((property *) p)->value);
delete((property *) p);
}
vec_destroy(&prop_list);
}
void getprop_all(void (*callback)(const char*, const char*)) {
if (init_resetprop()) return;
struct wrapper wrap = {
.func = callback
};
__system_property_foreach2(prop_foreach_cb, &wrap);
} }
int setprop(const char *name, const char *value) { int setprop(const char *name, const char *value) {
return setprop2(name, value, 1); return setprop2(name, value, 1);
} }
int setprop2(const char *name, const char *value, const int trigger) { int setprop2(const char *name, const char *value, const int trigger) {
if (init_resetprop()) return -1; if (check_legal_property_name(name))
int ret; return 1;
if (init_resetprop()) return -1;
int ret;
prop_info *pi = (prop_info*) __system_property_find2(name); prop_info *pi = (prop_info*) __system_property_find2(name);
if (pi != NULL) { if (pi != NULL) {
if (trigger) { if (trigger) {
if (!strncmp(name, "ro.", 3)) deleteprop(name, trigger); if (strncmp(name, "ro.", 3) == 0) deleteprop(name);
ret = __system_property_set2(name, value); ret = __system_property_set2(name, value);
} else { } else {
ret = __system_property_update2(pi, value, strlen(value)); ret = __system_property_update2(pi, value, strlen(value));
} }
} else { } else {
PRINT_D("resetprop: New prop [%s]\n", name); PRINT_D("resetprop: New prop [%s]\n", name);
if (trigger) { if (trigger) {
ret = __system_property_set2(name, value); ret = __system_property_set2(name, value);
} else { } else {
ret = __system_property_add2(name, strlen(name), value, strlen(value)); ret = __system_property_add2(name, strlen(name), value, strlen(value));
} }
} }
PRINT_D("resetprop: setprop [%s]: [%s] by %s\n", name, value, PRINT_D("resetprop: setprop [%s]: [%s] by %s\n", name, value,
trigger ? "property_service" : "modifing prop data structure"); trigger ? "property_service" : "modifing prop data structure");
if (ret) if (ret)
PRINT_E("resetprop: setprop error\n"); PRINT_E("resetprop: setprop error\n");
return ret; return ret;
} }
int deleteprop(const char *name, const int trigger) { int deleteprop(const char *name) {
if (init_resetprop()) return -1; return deleteprop2(name, 1);
PRINT_D("resetprop: deleteprop [%s]\n", name); }
if (trigger && strstr(name, "persist.")) {
char buffer[PATH_MAX]; int deleteprop2(const char *name, const int persist) {
snprintf(buffer, sizeof(buffer), "%s/%s", PERSISTENT_PROPERTY_DIR, name); if (check_legal_property_name(name))
unlink(buffer); return 1;
} if (init_resetprop()) return -1;
return __system_property_del(name); char path[PATH_MAX];
path[0] = '\0';
PRINT_D("resetprop: deleteprop [%s]\n", name);
if (persist && strncmp(name, "persist.", 8) == 0)
snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
return __system_property_del(name) && unlink(path);
} }
int read_prop_file(const char* filename, const int trigger) { int read_prop_file(const char* filename, const int trigger) {
if (init_resetprop()) return -1; if (init_resetprop()) return -1;
PRINT_D("resetprop: Load prop file [%s]\n", filename); PRINT_D("resetprop: Load prop file [%s]\n", filename);
FILE *fp = fopen(filename, "r"); FILE *fp = fopen(filename, "r");
if (fp == NULL) { if (fp == NULL) {
PRINT_E("Cannot open [%s]\n", filename); PRINT_E("Cannot open [%s]\n", filename);
return 1; return 1;
} }
char *line = NULL, *pch; char *line = NULL, *pch;
size_t len; size_t len;
ssize_t read; ssize_t read;
int comment = 0, i; int comment = 0, i;
while ((read = getline(&line, &len, fp)) != -1) { while ((read = getline(&line, &len, fp)) != -1) {
// Remove the trailing newline // Remove the trailing newline
if (line[read - 1] == '\n') { if (line[read - 1] == '\n') {
line[read - 1] = '\0'; line[read - 1] = '\0';
--read; --read;
} }
comment = 0; comment = 0;
for (i = 0; i < read; ++i) { for (i = 0; i < read; ++i) {
// Ignore starting spaces // Ignore starting spaces
if (line[i] == ' ') continue; if (line[i] == ' ') continue;
else { else {
// A line starting with # is ignored // A line starting with # is ignored
if (line[i] == '#') comment = 1; if (line[i] == '#') comment = 1;
break; break;
} }
} }
if (comment) continue; if (comment) continue;
pch = strchr(line, '='); pch = strchr(line, '=');
// Ignore ivalid formats // Ignore ivalid formats
if ( ((pch == NULL) || (i >= (pch - line))) || (pch >= line + read - 1) ) continue; if ( ((pch == NULL) || (i >= (pch - line))) || (pch >= line + read - 1) ) continue;
// Separate the string // Separate the string
*pch = '\0'; *pch = '\0';
setprop2(line + i, pch + 1, trigger); setprop2(line + i, pch + 1, trigger);
} }
free(line); free(line);
fclose(fp); fclose(fp);
return 0; return 0;
} }
int resetprop_main(int argc, char *argv[]) { int resetprop_main(int argc, char *argv[]) {
int trigger = 1, persist = 0;
char *argv0 = argv[0], *prop;
int del = 0, file = 0, trigger = 1; --argc;
++argv;
int exp_arg = 2; // Parse flags and -- options
char *name, *value, *filename; while (argc && argv[0][0] == '-') {
for (int idx = 1; 1; ++idx) {
switch (argv[0][idx]) {
case '-':
if (strcmp(argv[0], "--file") == 0 && argc == 2) {
return read_prop_file(argv[1], trigger);
} else if (strcmp(argv[0], "--delete") == 0 && argc == 2) {
return deleteprop2(argv[1], persist);
} else if (strcmp(argv[0], "--help") == 0) {
goto usage;
}
case 'v':
verbose = 1;
continue;
case 'p':
persist = 1;
continue;
case 'n':
trigger = 0;
continue;
case '\0':
break;
case 'h':
default:
usage:
return usage(argv0);
}
break;
}
--argc;
++argv;
}
if (argc < 3) { switch (argc) {
return usage(argv[0]); case 0:
} print_all_props(persist);
return 0;
for (int i = 1; i < argc; ++i) { case 1:
if (!strcmp("-v", argv[i])) { prop = getprop2(argv[0], persist);
verbose = 1; if (prop == NULL) return 1;
} else if (!strcmp("-n", argv[i])) { printf("%s\n", prop);
trigger = 0; free(prop);
} else if (!strcmp("--file", argv[i])) { return 0;
file = 1; case 2:
exp_arg = 1; return setprop2(argv[0], argv[1], trigger);
} else if (!strcmp("--delete", argv[i])) { default:
del = 1; usage(argv0);
exp_arg = 1; return 1;
} else { }
if (i + exp_arg > argc) {
return usage(argv[0]);
}
if (file) {
filename = argv[i];
break;
} else {
if(!is_legal_property_name(argv[i], strlen(argv[i]))) {
PRINT_E("Illegal property name: [%s]\n", argv[i]);
return 1;
}
name = argv[i];
if (exp_arg > 1) {
if (strlen(argv[i + 1]) >= PROP_VALUE_MAX) {
PRINT_E("Value too long: [%s]\n", argv[i + 1]);
return 1;
}
value = argv[i + 1];
}
break;
}
}
}
if (file) {
return read_prop_file(filename, trigger);
} else if (del) {
return deleteprop(name, trigger);
} else {
return setprop2(name, value, trigger);
}
return 0;
} }