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* Don't delete active lock files.

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This commit is contained in:
Eelco Dolstra 2005-01-31 12:19:53 +00:00
parent 1328aa3307
commit 33c5d23b81
5 changed files with 39 additions and 9 deletions
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26
src/libstore/gc.cc
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@ -194,9 +194,35 @@ void collectGarbage(const PathSet & roots, GCAction action,
debug(format("dead path `%1%'") % path);
result.insert(path);
AutoCloseFD fdLock;
if (action == gcDeleteDead) {
printMsg(lvlInfo, format("deleting `%1%'") % path);
/* Only delete a lock file if we can acquire a write lock
on it. That means that it's either stale, or the
process that created it hasn't locked it yet. In the
latter case the other process will detect that we
deleted the lock, and retry (see pathlocks.cc). */
if (path.size() >= 5 && string(path, path.size() - 5) == ".lock") {
fdLock = open(path.c_str(), O_RDWR);
if (fdLock == -1) {
if (errno == ENOENT) continue;
throw SysError(format("opening lock file `%1%'") % path);
}
if (!lockFile(fdLock, ltWrite, false)) {
debug(format("skipping active lock `%1%'") % path);
continue;
}
}
deleteFromStore(path);
if (fdLock != -1)
/* Write token to stale (deleted) lock file. */
writeFull(fdLock, (const unsigned char *) "d", 1);
}
/* Only delete lock files if the path is belongs to doesn't