Function ChangeToDataDir

src/backend/utils/init/miscinit.c:433–443

* Change working directory to DataDir. Most of the postmaster and backend * code assumes that we are in DataDir so it can use relative paths to access * stuff in and under the data directory. For convenience during path * setup, however, we don't force the chdir to occur during SetDataDir. */

 * setup, however, we don't force the chdir to occur during SetDataDir.
 */
void
ChangeToDataDir(void)
{
	AssertState(DataDir);

	if (chdir(DataDir) < 0)
		ereport(FATAL,
				(errcode_for_file_access(),
				 errmsg("could not change directory to \"%s\": %m",
						DataDir)));
}


/* ----------------------------------------------------------------