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io/close_range.c
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Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Close a range of file descriptors. Copyright (C) 2021-2026 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/>. */ #include <errno.h> #include <not-cancel.h> #include <unistd.h> /* Close the file descriptors from FIRST up to LAST, inclusive. */ int __close_range (unsigned int first, unsigned int last, int flags) { if (first > last || flags != 0) { __set_errno (EINVAL); return -1; } int maxfd = __getdtablesize (); if (maxfd == -1) return -1; for (int i = first; i <= last && i < maxfd; i++) __close_nocancel_nostatus (i); return 0; } libc_hidden_def (__close_range) weak_alias (__close_range, close_range)