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/* error return type, for libreswan
*
* Copyright (C) 1998, 1999, 2000 Henry Spencer.
* Copyright (C) 1999, 2000, 2001 Richard Guy Briggs
*
* 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. See <https://www.gnu.org/licenses/gpl2.txt>.
*
* 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.
*/
#ifndef ERR_H
#define ERR_H
/*
* Many routines return only success or failure, but wish to describe
* the failure in a message. We use the convention that they return a
* NULL on success and a pointer to constant string on failure. The
* fact that the string is a constant is limiting, but it avoids
* storage management issues: the recipient is allowed to assume that
* the string will live "long enough" (usually forever).
*
* XXX: Since the above was written pluto has become multi-threaded
* so, only when on the main thread, can this be true.
*/
typedef const char *err_t; /* error message, or NULL for success */
#endif
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