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/* Monitoring file descriptor usage.
Copyright (C) 2018-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef SUPPORT_DESCRIPTORS_H
#define SUPPORT_DESCRIPTORS_H
#include <stdio.h>
/* Opaque pointer, for capturing file descriptor lists. */
struct support_descriptors;
/* Record the currently open file descriptors and store them in the
returned list. Terminate the process if the listing operation
fails. */
struct support_descriptors *support_descriptors_list (void);
/* Deallocate the list of descriptors. */
void support_descriptors_free (struct support_descriptors *);
/* Write the list of descriptors to STREAM, adding PREFIX to each
line. */
void support_descriptors_dump (struct support_descriptors *,
const char *prefix, FILE *stream);
/* Check for file descriptor leaks and other file descriptor changes:
Compare the current list of descriptors with the passed list.
Record a test failure if there are additional open descriptors,
descriptors have been closed, or if a change in file descriptor can
be detected. */
void support_descriptors_check (struct support_descriptors *);
#endif /* SUPPORT_DESCRIPTORS_H */
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