/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd 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.
-
- systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
#include <dirent.h>
#include <stdbool.h>
#include <stdio.h>
int close_nointr(int fd);
int safe_close(int fd);
-void safe_close_pair(int p[]);
+void safe_close_pair(int p[static 2]);
static inline int safe_close_above_stdio(int fd) {
if (fd < 3) /* Don't close stdin/stdout/stderr, but still invalidate the fd by returning -1 */
return safe_close(fd);
}
-void close_many(const int fds[], unsigned n_fd);
+void close_many(const int fds[], size_t n_fd);
int fclose_nointr(FILE *f);
FILE* safe_fclose(FILE *f);
int fd_nonblock(int fd, bool nonblock);
int fd_cloexec(int fd, bool cloexec);
-int close_all_fds(const int except[], unsigned n_except);
+int close_all_fds(const int except[], size_t n_except);
int same_fd(int a, int b);
int acquire_data_fd(const void *data, size_t size, unsigned flags);
+int fd_duplicate_data_fd(int fd);
+
/* Hint: ENETUNREACH happens if we try to connect to "non-existing" special IP addresses, such as ::5 */
-#define ERRNO_IS_DISCONNECT(r) \
- IN_SET(r, ENOTCONN, ECONNRESET, ECONNREFUSED, ECONNABORTED, EPIPE, ENETUNREACH)
+/* The kernel sends e.g., EHOSTUNREACH or ENONET to userspace in some ICMP error cases.
+ * See the icmp_err_convert[] in net/ipv4/icmp.c in the kernel sources */
+#define ERRNO_IS_DISCONNECT(r) \
+ IN_SET(r, \
+ ENOTCONN, ECONNRESET, ECONNREFUSED, ECONNABORTED, EPIPE, \
+ ENETUNREACH, EHOSTUNREACH, ENOPROTOOPT, EHOSTDOWN, ENONET)
+
+/* Resource exhaustion, could be our fault or general system trouble */
+#define ERRNO_IS_RESOURCE(r) \
+ IN_SET(r, ENOMEM, EMFILE, ENFILE)
int fd_move_above_stdio(int fd);
(fd) = -1; \
_fd_; \
})
+
+int fd_reopen(int fd, int flags);
+
+int read_nr_open(void);