RTDECL(int) RTSymlinkRead(const char *pszSymlink, char *pszTarget, size_t cbTarget, uint32_t fRead)
{
char *pszMyTarget;
int rc = RTSymlinkReadA(pszSymlink, &pszMyTarget);
if (RT_SUCCESS(rc))
{
rc = RTStrCopy(pszTarget, cbTarget, pszMyTarget);
RTStrFree(pszMyTarget);
}
LogFlow(("RTSymlinkRead(%p={%s}): returns %Rrc\n", pszSymlink, pszSymlink, rc));
return rc;
}
/**
* Creates a UUID mapping for the file.
*
* @returns IPRT status code.
* @param pszCacheFile The path to the file in the cache.
* @param pFileUuid The UUID of the file.
* @param pszUuidMapDir The UUID map subdirectory in the cache, if this is
* wanted, otherwise NULL.
* @param pCfg The configuration.
*/
static int rtDbgSymCacheAddCreateUuidMapping(const char *pszCacheFile, PRTUUID pFileUuid,
const char *pszUuidMapDir, PCRTDBGSYMCACHEADDCFG pCfg)
{
/*
* Create the UUID map entry first, deep.
*/
char szMapPath[RTPATH_MAX];
int rc = RTPathJoin(szMapPath, sizeof(szMapPath) - sizeof("/xxxx/yyyy/xxxx/yyyy/xxxx/zzzzzzzzzzzz") + 1,
pCfg->pszCache, pszUuidMapDir);
if (RT_FAILURE(rc))
return RTMsgErrorRc(rc, "Error constructing UUID map path (RTPathJoin): %Rrc", rc);
size_t cch = strlen(szMapPath);
szMapPath[cch] = '-';
rc = RTUuidToStr(pFileUuid, &szMapPath[cch + 2], sizeof(szMapPath) - cch);
if (RT_FAILURE(rc))
return RTMsgErrorRc(rc, "Error constructing UUID map path (RTUuidToStr): %Rrc", rc);
/* Uppercase the whole lot. */
RTStrToUpper(&szMapPath[cch + 2]);
/* Split the first dword in two. */
szMapPath[cch + 1] = szMapPath[cch + 2];
szMapPath[cch + 2] = szMapPath[cch + 3];
szMapPath[cch + 3] = szMapPath[cch + 4];
szMapPath[cch + 4] = szMapPath[cch + 5];
szMapPath[cch + 5] = '-';
/*
* Create the directories in the path.
*/
char chSaved = RTPATH_SLASH;
for (unsigned i = 0; i < 6; i++, cch += 5)
{
Assert(szMapPath[cch] == '-');
szMapPath[cch] = '\0';
if (!RTDirExists(szMapPath))
{
rc = RTDirCreate(szMapPath, 0755, RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_NOT_CRITICAL);
if (RT_FAILURE(rc))
return RTMsgErrorRc(rc, "RTDirCreate failed on '%s' (UUID map path): %Rrc", szMapPath, rc);
}
szMapPath[cch] = RTPATH_SLASH;
}
cch -= 5;
/*
* Calculate a relative path from there to the actual file.
*/
char szLinkTarget[RTPATH_MAX];
//szMapPath[cch] = '\0';
rc = RTPathCalcRelative(szLinkTarget, sizeof(szLinkTarget), szMapPath, pszCacheFile);
//szMapPath[cch] = RTPATH_SLASH;
if (RT_FAILURE(rc))
return RTMsgErrorRc(rc, "Failed to calculate relative path from '%s' to '%s': %Rrc", szMapPath, pszCacheFile, rc);
/*
* If there is already a link there, check if it matches or whether
* perhaps it's target doesn't exist.
*/
RTFSOBJINFO ObjInfo;
rc = RTPathQueryInfoEx(szMapPath, &ObjInfo, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK);
if (RT_SUCCESS(rc))
{
if (RTFS_IS_SYMLINK(ObjInfo.Attr.fMode))
{
rc = RTPathQueryInfoEx(szMapPath, &ObjInfo, RTFSOBJATTRADD_NOTHING, RTPATH_F_FOLLOW_LINK);
if (RT_SUCCESS(rc))
{
char *pszCurTarget = NULL;
rc = RTSymlinkReadA(szMapPath, &pszCurTarget);
if (RT_FAILURE(rc))
return RTMsgErrorRc(rc, "UUID map: failed to read existing symlink '%s': %Rrc", szMapPath, rc);
if (RTPathCompare(pszCurTarget, szLinkTarget) == 0)
RTMsgInfo("UUID map: existing link '%s' has the same target ('%s').", szMapPath, pszCurTarget);
else
{
RTMsgError("UUID map: Existing mapping '%s' pointing to '%s' insted of '%s'",
szMapPath, pszCurTarget, szLinkTarget);
rc = VERR_ALREADY_EXISTS;
}
RTStrFree(pszCurTarget);
return rc;
}
else
RTMsgInfo("UUID map: replacing dangling link '%s'", szMapPath);
RTSymlinkDelete(szMapPath, 0 /*fFlags*/);
}
else if (RTFS_IS_FILE(ObjInfo.Attr.fMode))
return RTMsgErrorRc(VERR_IS_A_FILE,
"UUID map: found file at '%s', expect symbolic link or nothing.", szMapPath);
else if (RTFS_IS_DIRECTORY(ObjInfo.Attr.fMode))
return RTMsgErrorRc(VERR_IS_A_DIRECTORY,
"UUID map: found directory at '%s', expect symbolic link or nothing.", szMapPath);
else
return RTMsgErrorRc(VERR_NOT_SYMLINK,
"UUID map: Expected symbolic link or nothing at '%s', found: fMode=%#x",
szMapPath, ObjInfo.Attr.fMode);
}
/*
* Create the symbolic link.
*/
rc = RTSymlinkCreate(szMapPath, szLinkTarget, RTSYMLINKTYPE_FILE, 0);
if (RT_FAILURE(rc))
return RTMsgErrorRc(rc, "Failed to create UUID map symlink '%s' to '%s': %Rrc", szMapPath, szLinkTarget, rc);
RTMsgInfo("UUID map: %s => %s", szMapPath, szLinkTarget);
return VINF_SUCCESS;
}
