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Handle selinux for Samsung in binary

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topjohnwu
2017-03-29 02:23:10 +08:00
parent a6427d081e
commit 3f016f785f
3 changed files with 24 additions and 18 deletions
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1
jni/magiskhide/magiskhide.h
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@@ -22,6 +22,7 @@
#define HIDELIST "/magisk/.core/magiskhide/hidelist"
#define DUMMYPATH "/dev/magisk/dummy"
#define ENFORCE_FILE "/sys/fs/selinux/enforce"
#define POLICY_FILE "/sys/fs/selinux/policy"
#define SEPOLICY_INJECT "/data/magisk/magiskpolicy"
// Main thread

34
jni/magiskhide/util.c
View File

@@ -60,25 +60,37 @@ void run_as_daemon() {
void manage_selinux() {
char *argv[] = { SEPOLICY_INJECT, "--live", "permissive *", NULL };
char str[20];
char val[1];
int fd, ret;
fd = open(ENFORCE_FILE, O_RDONLY);
fd = open(ENFORCE_FILE, O_RDWR);
if (fd < 0)
return;
ret = read(fd, str, 20);
close(fd);
if (ret < 1)
if (read(fd, val, 1) < 1)
return;
lseek(fd, 0, SEEK_SET);
// Permissive
if (str[0] == '0') {
fprintf(logfile, "MagiskHide: Permissive detected, switching to pseudo enforced\n");
fd = open(ENFORCE_FILE, O_RDWR);
if (fd < 0)
if (val[0] == '0') {
fprintf(logfile, "MagiskHide: Permissive detected\n");
if (write(fd, "1", 1) < 1)
return;
ret = write(fd, "1", 1);
lseek(fd, 0, SEEK_SET);
if (read(fd, val, 1) < 1)
return;
lseek(fd, 0, SEEK_SET);
close(fd);
if (ret < 1)
if (val[0] == '0') {
fprintf(logfile, "MagiskHide: Unable to set to enforce, hide the state\n");
chmod(ENFORCE_FILE, 0640);
chmod(POLICY_FILE, 0440);
return;
}
fprintf(logfile, "MagiskHide: Calling magiskpolicy for pseudo enforce mode\n");
switch(fork()) {
case -1:
return;