status_t Format(const std::string& source) {
std::vector<std::string> cmd;
cmd.push_back(kMkfsPath);
cmd.push_back(source);
return ForkExecvp(cmd);
}
status_t Format(const std::string& source, unsigned long numSectors) {
std::vector<std::string> cmd;
cmd.push_back(kMkfsPath);
cmd.push_back("-F");
cmd.push_back("32");
cmd.push_back("-O");
cmd.push_back("android");
cmd.push_back("-c");
cmd.push_back("64");
cmd.push_back("-A");
if (numSectors) {
cmd.push_back("-s");
cmd.push_back(StringPrintf("%lu", numSectors));
}
cmd.push_back(source);
int rc = ForkExecvp(cmd);
if (rc < 0) {
SLOGE("Filesystem format failed due to logwrap error");
errno = EIO;
return -1;
}
if (rc == 0) {
SLOGI("Filesystem formatted OK");
return 0;
} else {
SLOGE("Format failed (unknown exit code %d)", rc);
errno = EIO;
return -1;
}
return 0;
}
status_t Check(const std::string& source) {
if (access(kFsckPath, X_OK)) {
SLOGW("Skipping fs checks\n");
return 0;
}
int pass = 1;
int rc = 0;
do {
std::vector<std::string> cmd;
cmd.push_back(kFsckPath);
cmd.push_back("-p");
cmd.push_back("-f");
cmd.push_back(source);
// Fat devices are currently always untrusted
rc = ForkExecvp(cmd, sFsckUntrustedContext);
if (rc < 0) {
SLOGE("Filesystem check failed due to logwrap error");
errno = EIO;
return -1;
}
switch(rc) {
case 0:
SLOGI("Filesystem check completed OK");
return 0;
case 2:
SLOGE("Filesystem check failed (not a FAT filesystem)");
errno = ENODATA;
return -1;
case 4:
if (pass++ <= 3) {
SLOGW("Filesystem modified - rechecking (pass %d)",
pass);
continue;
}
SLOGE("Failing check after too many rechecks");
errno = EIO;
return -1;
case 8:
SLOGE("Filesystem check failed (no filesystem)");
errno = ENODATA;
return -1;
default:
SLOGE("Filesystem check failed (unknown exit code %d)", rc);
errno = EIO;
return -1;
}
} while (0);
return 0;
}
status_t Check(const std::string& source) {
std::vector<std::string> cmd;
cmd.push_back(kFsckPath);
cmd.push_back("-a");
cmd.push_back(source);
// f2fs devices are currently always trusted
return ForkExecvp(cmd, sFsckContext);
}
