MarcoBuster/Magisk
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Support patching fstab in ramdisk for A-only 2SI

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This commit is contained in:
topjohnwu 2019-09-22 05:30:04 -04:00
parent a52a3e38ed
commit 748a35774f
1 changed files with 30 additions and 20 deletions
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50
native/jni/init/rootdir.cpp
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@ -384,26 +384,7 @@ void SARBase::patch_rootdir() {
close(dest); close(dest);
} }
#define FSR "/first_stage_ramdisk" static void patch_fstab(const string &fstab) {
void ABFirstStageInit::prepare() {
// Find fstab
DIR *dir = xopendir(FSR);
if (!dir)
return;
dirent *de;
string fstab(FSR "/");
while ((de = readdir(dir))) {
if (strstr(de->d_name, "fstab")) {
fstab += de->d_name;
break;
}
}
closedir(dir);
if (fstab.length() == sizeof(FSR))
return;
// Patch fstab
string patched = fstab + ".p"; string patched = fstab + ".p";
FILE *fp = xfopen(patched.data(), "we"); FILE *fp = xfopen(patched.data(), "we");
file_readline(fstab.data(), [=](string_view l) -> bool { file_readline(fstab.data(), [=](string_view l) -> bool {
@ -437,6 +418,26 @@ void ABFirstStageInit::prepare() {
// Replace old fstab // Replace old fstab
clone_attr(fstab.data(), patched.data()); clone_attr(fstab.data(), patched.data());
rename(patched.data(), fstab.data()); rename(patched.data(), fstab.data());
}
#define FSR "/first_stage_ramdisk"
void ABFirstStageInit::prepare() {
DIR *dir = xopendir(FSR);
if (!dir)
return;
string fstab(FSR "/");
for (dirent *de; (de = readdir(dir));) {
if (strstr(de->d_name, "fstab")) {
fstab += de->d_name;
break;
}
}
closedir(dir);
if (fstab.length() == sizeof(FSR))
return;
patch_fstab(fstab);
// Move stuffs for next stage // Move stuffs for next stage
xmkdir(FSR "/system", 0755); xmkdir(FSR "/system", 0755);
@ -449,6 +450,15 @@ void ABFirstStageInit::prepare() {
} }
void AFirstStageInit::prepare() { void AFirstStageInit::prepare() {
DIR *dir = xopendir("/");
for (dirent *de; (de = readdir(dir));) {
if (strstr(de->d_name, "fstab")) {
patch_fstab(de->d_name);
break;
}
}
closedir(dir);
// Move stuffs for next stage // Move stuffs for next stage
xmkdir("/system", 0755); xmkdir("/system", 0755);
xmkdir("/system/bin", 0755); xmkdir("/system/bin", 0755);