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/**
* @file maildir-updateflags.cc
* @brief Implementation of the Maildir class.
* @author Andreas Aardal Hanssen
* @date 2002-2005
*/
#include "iodevice.h"
#include "iofactory.h"
#include "maildir.h"
#include <errno.h>
#include <dirent.h>
#include <unistd.h>
using std::string;
void Binc::Maildir::updateFlags(void)
{
// don't update a read-only mailbox.
if (readOnly) return;
// open the cur/ directory
string curpath = path + "/cur/";
DIR *pdir = opendir(curpath.c_str());
if (pdir == nullptr) {
bincError << "failed to open " << curpath << ": " << strerror(errno) << std::endl;
return;
}
// read all entries in the directory
std::vector<string> entries;
struct dirent *pdirent;
while ((pdirent = readdir(pdir)) != nullptr) {
string filename = pdirent->d_name;
if (filename[0] == '.') continue;
entries.push_back(filename);
}
closedir(pdir);
bool customFlagsChanged = false;
// loop through all messages in cur/, and update the flags that have changed.
for (const auto &filename : entries) {
// separate the unique name from the flags. accept messages that do not
// contain the flags section.
string uniquename;
string::size_type pos;
if ((pos = filename.find(":2,")) != string::npos)
uniquename = filename.substr(0, pos);
else
uniquename = filename;
// only update flags for messages that are known.
MaildirMessage *message = get(uniquename);
if (!message) continue;
// check if custom flags have changed; if so, we need to regenerate the
// cache file.
if (message->internalFlags & MaildirMessage::CustomFlagsChanged) customFlagsChanged = true;
// generate the flag string.
string flags;
int mflags = message->getStdFlags();
if (mflags & Message::F_DRAFT) flags += "D";
if (mflags & Message::F_FLAGGED) flags += "F";
if (mflags & Message::F_PASSED) flags += "P";
if (mflags & Message::F_ANSWERED) flags += "R";
if (mflags & Message::F_SEEN) flags += "S";
if (mflags & Message::F_DELETED) flags += "T";
// prepare the old and new message name. if equal, skip to the next
// message.
string srcname = curpath + filename;
string destname = curpath + uniquename + ":2," + flags;
if (srcname == destname) continue;
// rename the file
if (rename(srcname.c_str(), destname.c_str()) != 0) {
if (errno == ENOENT) {
closedir(pdir);
if ((pdir = opendir(curpath.c_str())) == nullptr) {
bincError << "failed to open " << curpath << ": " << strerror(errno) << std::endl;
return;
}
// restart scan. this catches the race condition where concurrent
// clients may have set a flag or removed the message.
continue;
}
bincError << "failed to rename " << srcname << " to " << destname << ": "
<< strerror(errno) << std::endl;
} else {
index.insert(uniquename, 0, uniquename + ":2," + flags);
}
}
// finally, regenerate the cache file if the custom flags have changed.
if (customFlagsChanged) {
Lock lock(path);
writeCache();
}
}
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