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Merge pull request #130 from rfjakob/issue112

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Remove open_readonly_workaround
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Valient Gough 2015-11-30 11:21:43 -08:00
commit f0fdbd8fb0
1 changed files with 0 additions and 28 deletions
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28
encfs/RawFileIO.cpp
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@ -72,29 +72,6 @@ RawFileIO::~RawFileIO() {
rel::Interface RawFileIO::interface() const { return RawFileIO_iface; }
/*
Workaround for opening a file for write when permissions don't allow.
Since the kernel has already checked permissions, we can assume it is ok to
provide access. So force it by changing permissions temporarily. Should
be called with a lock around it so that there won't be a race condition
with calls to lstat picking up the wrong permissions.
*/
static int open_readonly_workaround(const char *path, int flags) {
int fd = -1;
struct stat stbuf;
memset(&stbuf, 0, sizeof(struct stat));
if (lstat(path, &stbuf) != -1) {
// make sure user has read/write permission..
chmod(path, stbuf.st_mode | 0600);
fd = ::open(path, flags);
chmod(path, stbuf.st_mode);
} else {
rInfo("can't stat file %s", path);
}
return fd;
}
/*
We shouldn't have to support all possible open flags, so untaint the flags
argument by only taking ones we understand and accept.
@ -128,11 +105,6 @@ int RawFileIO::open(int flags) {
rDebug("open file with flags %i, result = %i", finalFlags, newFd);
if ((newFd == -1) && (errno == EACCES)) {
rDebug("using readonly workaround for open");
newFd = open_readonly_workaround(name.c_str(), finalFlags);
}
if (newFd >= 0) {
if (oldfd >= 0) {
rError("leaking FD?: oldfd = %i, fd = %i, newfd = %i", oldfd, fd,