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master
lsfd-cmd/util.c
52 строки
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Masatake YAMATO
lsfd: add inspect_target_fd method to file_class
03 фев 2026, 23:23
03 фев 2026, 23:23
b758882
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/* * util.c - utilities used in lsfd * * Copyright (C) 2021-2026 Red Hat, Inc. All rights reserved. * Written by Masatake YAMATO <yamato@redhat.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "lsfd.h" /* prototype decl for call_with_foreign_fd */ #include "pidfd-utils.h" int call_with_foreign_fd_via_pidfd(int pidfd, int target_fd, int (*fn)(int, void*), void *data) { int tfd, r; tfd = pidfd_getfd(pidfd, target_fd, 0); if (tfd < 0) return tfd; r = fn(tfd, data); close(tfd); return r; } int call_with_foreign_fd(pid_t target_pid, int target_fd, int (*fn)(int, void*), void *data) { int pidfd, r; pidfd = pidfd_open(target_pid, 0); if (pidfd < 0) return pidfd; r = call_with_foreign_fd_via_pidfd(pidfd, target_fd, fn, data); close(pidfd); return r; }