#include <unistd.h>

Include dependency graph for pg_getopt.h:

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Functions
int	getopt (int nargc, char const nargv, const char *ostr)

Variables
PGDLLIMPORT char *	optarg

PGDLLIMPORT int	optind

PGDLLIMPORT int	opterr

PGDLLIMPORT int	optopt

Function Documentation

◆ getopt()

int getopt	(	int	nargc,
		char const	nargv,
		const char *	ostr
	)

Definition at line 71 of file getopt.c.

 {
     static char *place = EMSG;  /* option letter processing */
     char       *oli;            /* option letter list index */
  
     if (!*place)
     {                           /* update scanning pointer */
         if (optind >= nargc || *(place = nargv[optind]) != '-')
         {
             place = EMSG;
             return -1;
         }
         if (place[1] && *++place == '-' && place[1] == '\0')
         {                       /* found "--" */
             ++optind;
             place = EMSG;
             return -1;
         }
     }                           /* option letter okay? */
     if ((optopt = (int) *place++) == (int) ':' ||
         !(oli = strchr(ostr, optopt)))
     {
         /*
          * if the user didn't specify '-' as an option, assume it means -1.
          */
         if (optopt == (int) '-')
         {
             place = EMSG;
             return -1;
         }
         if (!*place)
             ++optind;
         if (opterr && *ostr != ':')
             (void) fprintf(stderr,
                            "illegal option -- %c\n", optopt);
         return BADCH;
     }
     if (*++oli != ':')
     {                           /* don't need argument */
         optarg = NULL;
         if (!*place)
             ++optind;
     }
     else
     {                           /* need an argument */
         if (*place)             /* no white space */
             optarg = place;
         else if (nargc <= ++optind)
         {                       /* no arg */
             place = EMSG;
             if (*ostr == ':')
                 return BADARG;
             if (opterr)
                 (void) fprintf(stderr,
                                "option requires an argument -- %c\n",
                                optopt);
             return BADCH;
         }
         else
             /* white space */
             optarg = nargv[optind];
         place = EMSG;
         ++optind;
     }
     return optopt;              /* dump back option letter */
 }