Fix inappropriate uses of atol()

Some code using atol() would not work correctly if sizeof(long)==4:

- src/bin/pg_basebackup/pg_basebackup.c: Would miscount size of a
  tablespace over 2 TB.

- src/bin/pg_basebackup/streamutil.c: Would truncate a timeline ID
  beyond INT32_MAX.

- src/bin/pg_rewind/libpq_source.c: Would miscount size of files
  larger than 2 GB (but this currently cannot happen).

Replace these with atoll().

In one case, the use of atol() did not result in incorrect behavior
but seems inconsistent with related code:

- src/interfaces/ecpg/ecpglib/execute.c: Gratuitous, since it
  processes a value from pg_type.typlen, which is int16.

Replace this with atoi().

Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://www.postgresql.org/message-id/flat/a52738ad-06bc-4d45-b59f-b38a8a89de49%40eisentraut.org

src/bin/pg_basebackup/pg_basebackup.c

@@ -2056,7 +2056,7 @@ BaseBackup(char *compression_algorithm, char *compression_detail,
 	tablespacecount = PQntuples(res);
 	for (i = 0; i < PQntuples(res); i++)
 	{
-		totalsize_kb += atol(PQgetvalue(res, i, 2));
+		totalsize_kb += atoll(PQgetvalue(res, i, 2));
 
 		/*
 		 * Verify tablespace directories are empty. Don't bother with the

src/bin/pg_basebackup/streamutil.c

@@ -631,7 +631,7 @@ GetSlotInformation(PGconn *conn, const char *slot_name,
 
 	/* current TLI */
 	if (!PQgetisnull(res, 0, 2))
-		tli_loc = (TimeLineID) atol(PQgetvalue(res, 0, 2));
+		tli_loc = (TimeLineID) atoll(PQgetvalue(res, 0, 2));
 
 	PQclear(res);
 

src/bin/pg_rewind/libpq_source.c

@@ -294,7 +294,7 @@ libpq_traverse_files(rewind_source *source, process_file_callback_t callback)
 		}
 
 		path = PQgetvalue(res, i, 0);
-		filesize = atol(PQgetvalue(res, i, 1));
+		filesize = atoll(PQgetvalue(res, i, 1));
 		isdir = (strcmp(PQgetvalue(res, i, 2), "t") == 0);
 		link_target = PQgetvalue(res, i, 3);
 

src/interfaces/ecpg/ecpglib/execute.c

@@ -278,7 +278,7 @@ ecpg_is_type_an_array(int type, const struct statement *stmt, const struct varia
 			isarray = ECPG_ARRAY_NONE;
 		else
 		{
-			isarray = (atol((char *) PQgetvalue(query, 0, 0)) == -1) ? ECPG_ARRAY_ARRAY : ECPG_ARRAY_VECTOR;
+			isarray = (atoi((char *) PQgetvalue(query, 0, 0)) == -1) ? ECPG_ARRAY_ARRAY : ECPG_ARRAY_VECTOR;
 			if (ecpg_dynamic_type(type) == SQL3_CHARACTER ||
 				ecpg_dynamic_type(type) == SQL3_CHARACTER_VARYING)
 			{