1/*
2 * Postgres files that use getopt(3) always include this file.
3 * We must cope with three different scenarios:
4 * 1. We're using the platform's getopt(), and we should just import the
5 * appropriate declarations.
6 * 2. The platform lacks getopt(), and we must declare everything.
7 * 3. The platform has getopt(), but we're not using it because we don't
8 * like its behavior. The declarations we make here must be compatible
9 * with both the platform's getopt() and our src/port/getopt.c.
10 *
11 * Portions Copyright (c) 1987, 1993, 1994
12 * The Regents of the University of California. All rights reserved.
13 *
14 * Portions Copyright (c) 2003-2019, PostgreSQL Global Development Group
15 *
16 * src/include/pg_getopt.h
17 */
18#ifndef PG_GETOPT_H
19#define PG_GETOPT_H
20
21/* POSIX says getopt() is provided by unistd.h */
22#include <unistd.h>
23
24/* rely on the system's getopt.h if present */
25#ifdef HAVE_GETOPT_H
26#include <getopt.h>
27#endif
28
29/*
30 * If we have <getopt.h>, assume it declares these variables, else do that
31 * ourselves. (We used to just declare them unconditionally, but Cygwin
32 * doesn't like that.)
33 */
34#ifndef HAVE_GETOPT_H
35
36extern char *optarg;
37extern int optind;
38extern int opterr;
39extern int optopt;
40
41#endif /* HAVE_GETOPT_H */
42
43/*
44 * Some platforms have optreset but fail to declare it in <getopt.h>, so cope.
45 * Cygwin, however, doesn't like this either.
46 */
47#if defined(HAVE_INT_OPTRESET) && !defined(__CYGWIN__)
48extern int optreset;
49#endif
50
51/* Provide getopt() declaration if the platform doesn't have it */
52#ifndef HAVE_GETOPT
53extern int getopt(int nargc, char *const *nargv, const char *ostr);
54#endif
55
56#endif /* PG_GETOPT_H */
57