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systemd/coccinelle/take-fd.cocci

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
@@
local idexpression p;
expression q;
@@
- p = q;
- q = -1;
- return p;
+ return TAKE_FD(q);
/* The ideal solution would use 'local idexpression' to avoid matching errno,
* which is a global variable. However, 'idexpression' nor 'identifier'
* would match, for example, "x->fd", which is considered 'expression' in
* the SmPL grammar
*/
@@
expression p != errno;
expression q;
@@
- p = q;
- q = -1;
+ p = TAKE_FD(q);