PostgreSQL Source Code git master
All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Pages
pg_getopt.h
Go to the documentation of this file.
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) 2003-2025, PostgreSQL Global Development Group
15 *
16 * src/include/pg_getopt.h
17 */
18/* IWYU pragma: always_keep */
19#ifndef PG_GETOPT_H
20#define PG_GETOPT_H
21
22/* POSIX says getopt() is provided by unistd.h */
23#include <unistd.h> /* IWYU pragma: export */
24
25/* rely on the system's getopt.h if present */
26#ifdef HAVE_GETOPT_H
27#include <getopt.h> /* IWYU pragma: export */
28#endif
29
30/*
31 * If we have <getopt.h>, assume it declares these variables, else do that
32 * ourselves. (We used to just declare them unconditionally, but Cygwin
33 * doesn't like that.)
34 */
35#ifndef HAVE_GETOPT_H
36
37extern PGDLLIMPORT char *optarg;
38extern PGDLLIMPORT int optind;
39extern PGDLLIMPORT int opterr;
40extern PGDLLIMPORT int optopt;
41
42#endif /* HAVE_GETOPT_H */
43
44/*
45 * Some platforms have optreset but fail to declare it in <getopt.h>, so cope.
46 * Cygwin, however, doesn't like this either.
47 */
48#if defined(HAVE_INT_OPTRESET) && !defined(__CYGWIN__)
49extern PGDLLIMPORT int optreset;
50#endif
51
52/* Provide getopt() declaration if the platform doesn't have it */
53#ifndef HAVE_GETOPT
54extern int getopt(int nargc, char *const *nargv, const char *ostr);
55#endif
56
57#endif /* PG_GETOPT_H */
#define PGDLLIMPORT
Definition: c.h:1291
PGDLLIMPORT int optind
Definition: getopt.c:51
PGDLLIMPORT int optopt
Definition: getopt.c:52
PGDLLIMPORT int opterr
Definition: getopt.c:50
int getopt(int nargc, char *const *nargv, const char *ostr)
Definition: getopt.c:72
PGDLLIMPORT char * optarg
Definition: getopt.c:53