Mercurial > gnulib
view lib/dirfd.c @ 40198:5a34193cbc07
long-options: add parse_gnu_standard_options_only
Discussed in https://bugs.gnu.org/33468 .
* lib/long-options.c (parse_long_options): Use EXIT_SUCCESS instead
of 0.
(parse_gnu_standard_options_only): Add function to
process the GNU default options --help and --version and fail for any other
unknown long or short option. See
https://gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html .
* lib/long-options.h (parse_gnu_standard_options_only): Declare it.
* modules/long-options (depends-on): Add stdbool, exitfail.
* top/maint.mk (sc_prohibit_long_options_without_use): Update
syntax-check rule, add new function name.
author | Bernhard Voelker <mail@bernhard-voelker.de> |
---|---|
date | Thu, 29 Nov 2018 09:06:26 +0100 |
parents | b06060465f09 |
children |
line wrap: on
line source
/* dirfd.c -- return the file descriptor associated with an open DIR* Copyright (C) 2001, 2006, 2008-2019 Free Software Foundation, Inc. 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 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* Written by Jim Meyering. */ #include <config.h> #include <dirent.h> #include <errno.h> #ifdef __KLIBC__ # include <stdlib.h> # include <io.h> static struct dirp_fd_list { DIR *dirp; int fd; struct dirp_fd_list *next; } *dirp_fd_start = NULL; /* Register fd associated with dirp to dirp_fd_list. */ int _gl_register_dirp_fd (int fd, DIR *dirp) { struct dirp_fd_list *new_dirp_fd = malloc (sizeof *new_dirp_fd); if (!new_dirp_fd) return -1; new_dirp_fd->dirp = dirp; new_dirp_fd->fd = fd; new_dirp_fd->next = dirp_fd_start; dirp_fd_start = new_dirp_fd; return 0; } /* Unregister fd from dirp_fd_list with closing it */ void _gl_unregister_dirp_fd (int fd) { struct dirp_fd_list *dirp_fd; struct dirp_fd_list *dirp_fd_prev; for (dirp_fd_prev = NULL, dirp_fd = dirp_fd_start; dirp_fd; dirp_fd_prev = dirp_fd, dirp_fd = dirp_fd->next) { if (dirp_fd->fd == fd) { if (dirp_fd_prev) dirp_fd_prev->next = dirp_fd->next; else /* dirp_fd == dirp_fd_start */ dirp_fd_start = dirp_fd_start->next; close (fd); free (dirp_fd); break; } } } #endif int dirfd (DIR *dir_p) { int fd = DIR_TO_FD (dir_p); if (fd == -1) #ifndef __KLIBC__ errno = ENOTSUP; #else { struct dirp_fd_list *dirp_fd; for (dirp_fd = dirp_fd_start; dirp_fd; dirp_fd = dirp_fd->next) if (dirp_fd->dirp == dir_p) return dirp_fd->fd; errno = EINVAL; } #endif return fd; }