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/*
* Standard system includes and portability adjustments.
*
* Declarations of routines and variables in the C library. Including this
* file is the equivalent of including all of the following headers,
* portably:
*
* #include <inttypes.h>
* #include <limits.h>
* #include <stdarg.h>
* #include <stdbool.h>
* #include <stddef.h>
* #include <stdint.h>
* #include <stdio.h>
* #include <stdlib.h>
* #include <string.h>
* #include <strings.h>
* #include <sys/types.h>
* #include <unistd.h>
*
* Missing functions are provided via #define or prototyped if available from
* the portable helper library. Also provides some standard #defines.
*
* The canonical version of this file is maintained in the rra-c-util package,
* which can be found at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
*
* Written by Russ Allbery <eagle@eyrie.org>
* Copyright 2014, 2016, 2018, 2020-2021 Russ Allbery <eagle@eyrie.org>
* Copyright 2006-2011, 2013-2014
* The Board of Trustees of the Leland Stanford Junior University
*
* Copying and distribution of this file, with or without modification, are
* permitted in any medium without royalty provided the copyright notice and
* this notice are preserved. This file is offered as-is, without any
* warranty.
*
* SPDX-License-Identifier: FSFAP
*/
#ifndef PORTABLE_SYSTEM_H
#define PORTABLE_SYSTEM_H 1
/* Make sure we have our configuration information. */
#include <config.h>
/* BEGIN_DECL and __attribute__. */
#include <portable/macros.h>
/* A set of standard ANSI C headers. We don't care about pre-ANSI systems. */
#if HAVE_INTTYPES_H
# include <inttypes.h>
#endif
#include <limits.h>
#include <stdarg.h>
#include <stddef.h>
#if HAVE_STDINT_H
# include <stdint.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if HAVE_STRINGS_H
# include <strings.h>
#endif
#include <sys/types.h>
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
/* SCO OpenServer gets int32_t from here. */
#if HAVE_SYS_BITYPES_H
# include <sys/bitypes.h>
#endif
/* Get the bool type. */
#include <portable/stdbool.h>
/* In case uint32_t and associated limits weren't defined. */
#ifndef UINT32_MAX
# define UINT32_MAX 4294967295UL
#endif
/* Windows provides snprintf under a different name. */
#ifdef _WIN32
# define snprintf _snprintf
#endif
/* Define sig_atomic_t if it's not available in signal.h. */
#ifndef HAVE_SIG_ATOMIC_T
typedef int sig_atomic_t;
#endif
/* Windows does not define ssize_t. */
#ifndef HAVE_SSIZE_T
typedef ptrdiff_t ssize_t;
#endif
/*
* POSIX requires that these be defined in <unistd.h>. If one of them has
* been defined, all the rest almost certainly have.
*/
#ifndef STDIN_FILENO
# define STDIN_FILENO 0
# define STDOUT_FILENO 1
# define STDERR_FILENO 2
#endif
/*
* C99 requires va_copy. Older versions of GCC provide __va_copy. Per the
* Autoconf manual, memcpy is a generally portable fallback.
*/
#ifndef va_copy
# ifdef __va_copy
# define va_copy(d, s) __va_copy((d), (s))
# else
# define va_copy(d, s) memcpy(&(d), &(s), sizeof(va_list))
# endif
#endif
BEGIN_DECLS
/* Default to a hidden visibility for all portability functions. */
#pragma GCC visibility push(hidden)
/*
* Provide prototypes for functions not declared in system headers. Use the
* HAVE_DECL macros for those functions that may be prototyped but implemented
* incorrectly or implemented without a prototype.
*/
#if !HAVE_ASPRINTF
extern int asprintf(char **, const char *, ...)
__attribute__((__format__(printf, 2, 3)));
extern int vasprintf(char **, const char *, va_list)
__attribute__((__format__(printf, 2, 0)));
#endif
#if !HAVE_DAEMON
extern int daemon(int, int);
#endif
#if !HAVE_MKSTEMP
extern int mkstemp(char *);
#endif
#if !HAVE_DECL_REALLOCARRAY
extern void *reallocarray(void *, size_t, size_t);
#endif
#if !HAVE_SETENV
extern int setenv(const char *, const char *, int);
#endif
#if !HAVE_STRNDUP
extern char *strndup(const char *, size_t);
#endif
/* Undo default visibility change. */
#pragma GCC visibility pop
END_DECLS
#endif /* !PORTABLE_SYSTEM_H */
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