src/include/pg_getopt.h

   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) 2003-2021, 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
  36 extern char *optarg;
  37 extern int      optind;
  38 extern int      opterr;
  39 extern 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__)
  48 extern int      optreset;
  49 #endif
  50
  51 /* Provide getopt() declaration if the platform doesn't have it */
  52 #ifndef HAVE_GETOPT
  53 extern int      getopt(int nargc, char *const *nargv, const char *ostr);
  54 #endif
  55
  56 #endif                                                  /* PG_GETOPT_H */