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; }