68c597e9e4
Fixes #9773.
111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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#include <dirent.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <sys/socket.h>
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#include "macro.h"
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/* Make sure we can distinguish fd 0 and NULL */
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#define FD_TO_PTR(fd) INT_TO_PTR((fd)+1)
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#define PTR_TO_FD(p) (PTR_TO_INT(p)-1)
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int close_nointr(int fd);
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int safe_close(int fd);
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void safe_close_pair(int p[]);
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static inline int safe_close_above_stdio(int fd) {
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if (fd < 3) /* Don't close stdin/stdout/stderr, but still invalidate the fd by returning -1 */
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return -1;
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return safe_close(fd);
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}
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void close_many(const int fds[], size_t n_fd);
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int fclose_nointr(FILE *f);
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FILE* safe_fclose(FILE *f);
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DIR* safe_closedir(DIR *f);
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static inline void closep(int *fd) {
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safe_close(*fd);
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}
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static inline void close_pairp(int (*p)[2]) {
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safe_close_pair(*p);
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}
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static inline void fclosep(FILE **f) {
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safe_fclose(*f);
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}
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DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
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DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
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#define _cleanup_close_ _cleanup_(closep)
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#define _cleanup_fclose_ _cleanup_(fclosep)
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#define _cleanup_pclose_ _cleanup_(pclosep)
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#define _cleanup_closedir_ _cleanup_(closedirp)
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#define _cleanup_close_pair_ _cleanup_(close_pairp)
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int fd_nonblock(int fd, bool nonblock);
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int fd_cloexec(int fd, bool cloexec);
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int close_all_fds(const int except[], size_t n_except);
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int same_fd(int a, int b);
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void cmsg_close_all(struct msghdr *mh);
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bool fdname_is_valid(const char *s);
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int fd_get_path(int fd, char **ret);
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int move_fd(int from, int to, int cloexec);
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enum {
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ACQUIRE_NO_DEV_NULL = 1 << 0,
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ACQUIRE_NO_MEMFD = 1 << 1,
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ACQUIRE_NO_PIPE = 1 << 2,
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ACQUIRE_NO_TMPFILE = 1 << 3,
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ACQUIRE_NO_REGULAR = 1 << 4,
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};
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int acquire_data_fd(const void *data, size_t size, unsigned flags);
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int fd_duplicate_data_fd(int fd);
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/* Hint: ENETUNREACH happens if we try to connect to "non-existing" special IP addresses, such as ::5 */
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/* The kernel sends e.g., EHOSTUNREACH or ENONET to userspace in some ICMP error cases.
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* See the icmp_err_convert[] in net/ipv4/icmp.c in the kernel sources */
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#define ERRNO_IS_DISCONNECT(r) \
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IN_SET(r, \
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ENOTCONN, ECONNRESET, ECONNREFUSED, ECONNABORTED, EPIPE, \
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ENETUNREACH, EHOSTUNREACH, ENOPROTOOPT, EHOSTDOWN, ENONET)
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/* Resource exhaustion, could be our fault or general system trouble */
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#define ERRNO_IS_RESOURCE(r) \
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IN_SET(r, ENOMEM, EMFILE, ENFILE)
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int fd_move_above_stdio(int fd);
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int rearrange_stdio(int original_input_fd, int original_output_fd, int original_error_fd);
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static inline int make_null_stdio(void) {
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return rearrange_stdio(-1, -1, -1);
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}
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/* Like TAKE_PTR() but for file descriptors, resetting them to -1 */
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#define TAKE_FD(fd) \
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({ \
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int _fd_ = (fd); \
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(fd) = -1; \
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_fd_; \
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})
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int fd_reopen(int fd, int flags);
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int read_nr_open(void);
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