Use the new [io]_stream_create_fd_*autoclose() functions wherever possible.

Parallel to identical Dovecot change.

src/lib-sieve-tool/sieve-tool.c

@@ -515,7 +515,7 @@ struct ostream *sieve_tool_open_output_stream(const char *filename)
 			i_fatal("failed to open file for writing: %m");
 		}
 
-		outstream = o_stream_create_fd(fd, 0, TRUE);
+		outstream = o_stream_create_fd_autoclose(&fd, 0);
 	}
 
 	return outstream;

src/lib-sieve/sieve-script-file.c

@@ -286,14 +286,14 @@ static int sieve_file_script_get_stream
 			*error_r = SIEVE_ERROR_TEMP_FAILURE;
 			result = NULL;
 		} else {
-			result = i_stream_create_fd(fd, SIEVE_FILE_READ_BLOCK_SIZE, TRUE);
+			result = i_stream_create_fd_autoclose(&fd, SIEVE_FILE_READ_BLOCK_SIZE);
 			script->st = script->lnk_st = st;
 		}
 	}
 
 	if ( result == NULL ) {
 		/* Something went wrong, close the fd */
-		if ( close(fd) != 0 ) {
+		if ( fd >= 0 && close(fd) != 0 ) {
 			sieve_sys_error(svinst,
 				"failed to close sieve script: close(fd=%s) failed: %m", script->path);
 		}

src/lib-sieve/sieve-script-private.h

@@ -89,8 +89,6 @@ struct sieve_file_script {
 	const char *filename;
 	const char *binpath;
 	const char *binprefix;
-
-	int fd;
 };
 
 extern const struct sieve_script sieve_file_script;

src/testsuite/testsuite-smtp.c

@@ -95,7 +95,7 @@ void *testsuite_smtp_start
 			smtp->msg_file);
 	}
 
-	smtp->output = o_stream_create_fd(fd, (size_t)-1, TRUE);
+	smtp->output = o_stream_create_fd_autoclose(&fd, (size_t)-1);
 
 	return (void *) smtp;
 }