uint64_t getFileSize(const UnicodeString& path) {
struct _stat s;
if (statPath(path, &s)) {
return s.st_size;
}
return 0;
}
uint64_t getFileSize(const char* path) {
struct _stat s;
if (statPath(path, &s)) {
return s.st_size;
}
return 0;
}
bool fileExists(const UnicodeString& path) {
struct _stat s;
if (statPath(path, &s)) {
return _S_ISREG(s.st_mode);
} else {
return false;
}
}
bool dirExists(const std::string& path) {
struct _stat s;
if (statPath(path, &s)) {
return _S_ISDIR(s.st_mode);
} else {
return false;
}
}
PathType pathType(const UnicodeString& path) {
struct _stat s;
if (statPath(path, &s)) {
return _S_ISREG(s.st_mode) ? PATHTYPE_FILE : (_S_ISDIR(s.st_mode) ? PATHTYPE_DIR : PATHTYPE_NONE);
} else {
return PATHTYPE_NONE;
}
}
void
OpenFileFinder::FillInfo(OpenFileFinder::Info* aInfo, const nsACString& aPath)
{
aInfo->mFileName = aPath;
aInfo->mPid = mPid;
nsPrintfCString exePath("/proc/%d/exe", mPid);
ReadSymLink(exePath, aInfo->mExe);
aInfo->mComm.Truncate();
aInfo->mAppName.Truncate();
nsPrintfCString statPath("/proc/%d/stat", mPid);
nsCString statString;
statString.SetLength(200);
char *stat = statString.BeginWriting();
if (!stat) {
return;
}
ReadSysFile(statPath.get(), stat, statString.Length());
// The stat line includes the comm field, surrounded by parenthesis.
// However, the contents of the comm field itself is arbitrary and
// and can include ')', so we search for the rightmost ) as being
// the end of the comm field.
char *closeParen = strrchr(stat, ')');
if (!closeParen) {
return;
}
char *openParen = strchr(stat, '(');
if (!openParen) {
return;
}
if (openParen >= closeParen) {
return;
}
nsDependentCSubstring comm(&openParen[1], closeParen - openParen - 1);
aInfo->mComm = comm;
// There is a single character field after the comm and then
// the parent pid (the field we're interested in).
// ) X ppid
// 01234
int ppid = atoi(&closeParen[4]);
if (mPid == mMyPid) {
// This is chrome process
aInfo->mIsB2gOrDescendant = true;
DBG("Chrome process has open file(s)");
return;
}
// For the rest (non-chrome process), we recursively check the ppid to know
// it is a descendant of b2g or not. See bug 931456.
while (ppid != mMyPid && ppid != 1) {
DBG("Process(%d) is not forked from b2g(%d) or Init(1), keep looking",
ppid, mMyPid);
nsPrintfCString ppStatPath("/proc/%d/stat", ppid);
ReadSysFile(ppStatPath.get(), stat, statString.Length());
closeParen = strrchr(stat, ')');
if (!closeParen) {
return;
}
ppid = atoi(&closeParen[4]);
}
if (ppid == 1) {
// This is a not a b2g process.
DBG("Non-b2g process has open file(s)");
aInfo->mIsB2gOrDescendant = false;
return;
}
if (ppid == mMyPid) {
// This is a descendant of b2g.
DBG("Child process of chrome process has open file(s)");
aInfo->mIsB2gOrDescendant = true;
}
// This looks like a content process. The comm field will be the
// app name.
aInfo->mAppName = aInfo->mComm;
}
