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Issue #1829 - Revert "Issue #1751"

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This commit is contained in:
Brian Smith 2022-04-26 11:34:08 -05:00 • committed by roytam1
commit 13fcc4a046
949 changed files with 95662 additions and 444 deletions
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72
toolkit/profile/nsProfileLock.cpp
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@ -13,6 +13,11 @@
#include "nsAutoPtr.h"
#endif
#if defined(XP_MACOSX)
#include <Carbon/Carbon.h>
#include <CoreFoundation/CoreFoundation.h>
#endif
#ifdef XP_UNIX
#include <unistd.h>
#include <fcntl.h>
@ -421,7 +426,10 @@ nsresult nsProfileLock::GetReplacedLockTime(PRTime *aResult) {
nsresult nsProfileLock::Lock(nsIFile* aProfileDir,
nsIProfileUnlocker* *aUnlocker)
{
#if defined (XP_UNIX)
#if defined (XP_MACOSX)
NS_NAMED_LITERAL_STRING(LOCKFILE_NAME, ".parentlock");
NS_NAMED_LITERAL_STRING(OLD_LOCKFILE_NAME, "parent.lock");
#elif defined (XP_UNIX)
NS_NAMED_LITERAL_STRING(OLD_LOCKFILE_NAME, "lock");
NS_NAMED_LITERAL_STRING(LOCKFILE_NAME, ".parentlock");
#else
@ -450,7 +458,67 @@ nsresult nsProfileLock::Lock(nsIFile* aProfileDir,
if (NS_FAILED(rv))
return rv;
#if defined(XP_UNIX)
#if defined(XP_MACOSX)
// First, try locking using fcntl. It is more reliable on
// a local machine, but may not be supported by an NFS server.
rv = LockWithFcntl(lockFile);
if (NS_FAILED(rv) && (rv != NS_ERROR_FILE_ACCESS_DENIED))
{
// If that failed for any reason other than NS_ERROR_FILE_ACCESS_DENIED,
// assume we tried an NFS that does not support it. Now, try with symlink.
rv = LockWithSymlink(lockFile, false);
}
if (NS_SUCCEEDED(rv))
{
// Check for the old-style lock used by pre-mozilla 1.3 builds.
// Those builds used an earlier check to prevent the application
// from launching if another instance was already running. Because
// of that, we don't need to create an old-style lock as well.
struct LockProcessInfo
{
ProcessSerialNumber psn;
unsigned long launchDate;
};
PRFileDesc *fd = nullptr;
int32_t ioBytes;
ProcessInfoRec processInfo;
LockProcessInfo lockProcessInfo;
rv = lockFile->SetLeafName(OLD_LOCKFILE_NAME);
if (NS_FAILED(rv))
return rv;
rv = lockFile->OpenNSPRFileDesc(PR_RDONLY, 0, &fd);
if (NS_SUCCEEDED(rv))
{
ioBytes = PR_Read(fd, &lockProcessInfo, sizeof(LockProcessInfo));
PR_Close(fd);
if (ioBytes == sizeof(LockProcessInfo))
{
#ifdef __LP64__
processInfo.processAppRef = nullptr;
#else
processInfo.processAppSpec = nullptr;
#endif
processInfo.processName = nullptr;
processInfo.processInfoLength = sizeof(ProcessInfoRec);
if (::GetProcessInformation(&lockProcessInfo.psn, &processInfo) == noErr &&
processInfo.processLaunchDate == lockProcessInfo.launchDate)
{
return NS_ERROR_FILE_ACCESS_DENIED;
}
}
else
{
NS_WARNING("Could not read lock file - ignoring lock");
}
}
rv = NS_OK; // Don't propagate error from OpenNSPRFileDesc.
}
#elif defined(XP_UNIX)
// Get the old lockfile name
nsCOMPtr<nsIFile> oldLockFile;
rv = aProfileDir->Clone(getter_AddRefs(oldLockFile));