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76 lines
2.8 KiB
C
76 lines
2.8 KiB
C
/* exechelp.h - Definitions for the fork and exec helpers
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* Copyright (C) 2004, 2009, 2010 Free Software Foundation, Inc.
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* Copyright (C) 2004, 2006-2012, 2014-2017 g10 Code GmbH
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*
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* This file is part of GnuPG.
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of either
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*
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* - the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* or
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*
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* - the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* or both in parallel, as here.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <https://www.gnu.org/licenses/>.
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* SPDX-License-Identifier: (LGPL-3.0+ OR GPL-2.0+)
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*/
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#ifndef GNUPG_COMMON_EXECHELP_H
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#define GNUPG_COMMON_EXECHELP_H
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/* Return the maximum number of currently allowed file descriptors.
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Only useful on POSIX systems. */
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int get_max_fds (void);
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/* Close all file descriptors starting with descriptor FIRST. If
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EXCEPT is not NULL, it is expected to be a list of file descriptors
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which are not to close. This list shall be sorted in ascending
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order with its end marked by -1. */
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void close_all_fds (int first, const int *except);
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/* Returns an array with all currently open file descriptors. The end
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of the array is marked by -1. The caller needs to release this
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array using the *standard free* and not with xfree. This allow the
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use of this function right at startup even before libgcrypt has
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been initialized. Returns NULL on error and sets ERRNO accordingly. */
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int *get_all_open_fds (void);
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/* Portable function to create a pipe. Under Windows the write end is
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inheritable. If R_FP is not NULL, an estream is created for the
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write end and stored at R_FP. */
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gpg_error_t gnupg_create_inbound_pipe (int filedes[2],
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estream_t *r_fp, int nonblock);
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/* Portable function to create a pipe. Under Windows the read end is
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inheritable. If R_FP is not NULL, an estream is created for the
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write end and stored at R_FP. */
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gpg_error_t gnupg_create_outbound_pipe (int filedes[2],
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estream_t *r_fp, int nonblock);
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/* Portable function to create a pipe. Under Windows both ends are
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inheritable. */
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gpg_error_t gnupg_create_pipe (int filedes[2]);
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/* Close the end of a pipe. */
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void gnupg_close_pipe (int fd);
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#endif /*GNUPG_COMMON_EXECHELP_H*/
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