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Support oplus.fstab

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vvb2060 2021-07-25 17:49:47 +08:00 committed by John Wu
parent 439d497a13
commit acf166cf9d
1 changed files with 57 additions and 19 deletions
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76
native/jni/init/twostage.cpp
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@ -1,4 +1,5 @@
#include <sys/mount.h>
#include <unordered_map>
#include <magisk.hpp>
#include <utils.hpp>
@ -17,6 +18,32 @@ void fstab_entry::to_file(FILE *fp) {
line[val##1] = '\0'; \
entry.val = &line[val##0];
static void read_fstab_file(const char *fstab_file, vector<fstab_entry> &fstab) {
file_readline(fstab_file, [&](string_view l) -> bool {
if (l[0] == '#' || l.length() == 1)
return true;
char *line = (char *) l.data();
int dev0, dev1, mnt_point0, mnt_point1, type0, type1,
mnt_flags0, mnt_flags1, fsmgr_flags0, fsmgr_flags1;
sscanf(line, "%n%*s%n %n%*s%n %n%*s%n %n%*s%n %n%*s%n",
&dev0, &dev1, &mnt_point0, &mnt_point1, &type0, &type1,
&mnt_flags0, &mnt_flags1, &fsmgr_flags0, &fsmgr_flags1);
fstab_entry entry;
set_info(dev)
set_info(mnt_point)
set_info(type)
set_info(mnt_flags)
set_info(fsmgr_flags)
fstab.emplace_back(move(entry));
return true;
});
}
#define FSR "/first_stage_ramdisk"
extern uint32_t patch_verity(void *buf, uint32_t size);
@ -91,29 +118,40 @@ exit_loop:
init.patch({ make_pair("android,fstab", "xxx") });
} else {
// Parse and load the fstab file
file_readline(fstab_file, [&](string_view l) -> bool {
if (l[0] == '#' || l.length() == 1)
return true;
char *line = (char *) l.data();
read_fstab_file(fstab_file, fstab);
}
int dev0, dev1, mnt_point0, mnt_point1, type0, type1,
mnt_flags0, mnt_flags1, fsmgr_flags0, fsmgr_flags1;
// Append oppo's custom fstab
if (access("oplus.fstab", F_OK) == 0) {
LOGD("Found fstab file: %s\n", "oplus.fstab");
vector<fstab_entry> oplus_fstab;
unordered_map<string, string> bind_map;
sscanf(line, "%n%*s%n %n%*s%n %n%*s%n %n%*s%n %n%*s%n",
&dev0, &dev1, &mnt_point0, &mnt_point1, &type0, &type1,
&mnt_flags0, &mnt_flags1, &fsmgr_flags0, &fsmgr_flags1);
read_fstab_file("oplus.fstab", oplus_fstab);
fstab_entry entry;
for (auto &entry : oplus_fstab) {
if (entry.mnt_flags.find("bind") != string::npos) {
bind_map.emplace(entry.dev, entry.mnt_point);
entry.dev = "";
}
}
set_info(dev);
set_info(mnt_point);
set_info(type);
set_info(mnt_flags);
set_info(fsmgr_flags);
for (auto &entry : oplus_fstab) {
// Merge bind entries
if (entry.dev.empty())
continue;
auto got = bind_map.find(entry.mnt_point);
if (got != bind_map.end())
entry.mnt_point = got->second;
fstab.emplace_back(std::move(entry));
return true;
});
// Mount befor switch root, fix img path
if (str_starts(entry.dev, "loop@/system/"))
entry.dev.insert(5, "/system_root");
fstab.push_back(move(entry));
}
unlink("oplus.fstab");
}
{
@ -180,7 +218,7 @@ void SARInit::first_stage_prep() {
sigprocmask(SIG_SETMASK, &old, nullptr);
} else {
// Establish socket for 2nd stage ack
struct sockaddr_un sun;
struct sockaddr_un sun{};
int sockfd = xsocket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
xbind(sockfd, (struct sockaddr*) &sun, setup_sockaddr(&sun, INIT_SOCKET));
xlisten(sockfd, 1);