openldap/libraries/liblutil/getopt.c
2002-01-04 21:17:25 +00:00

110 lines
1.9 KiB
C

/* $OpenLDAP$ */
/*
* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
/*
getopt.c
modified public-domain AT&T getopt(3)
modified by Kurt Zeilenga for inclusion into OpenLDAP
*/
#include "portable.h"
#ifndef HAVE_GETOPT
#include <stdio.h>
#include <ac/string.h>
#include <ac/unistd.h>
#ifdef HAVE_IO_H
#include <io.h>
#endif
#ifndef STDERR_FILENO
#define STDERR_FILENO 2
#endif
int opterr = 1;
int optind = 1;
int optopt;
char * optarg;
static void ERR (char * const argv[], const char * s, char c)
{
char errbuf[2];
#ifdef DF_TRACE_DEBUG
printf("DF_TRACE_DEBUG: static void ERR () in getopt.c\n");
#endif
if (opterr)
{
errbuf[0] = c;
errbuf[1] = '\n';
(void) write(STDERR_FILENO,argv[0],strlen(argv[0]));
(void) write(STDERR_FILENO,s,strlen(s));
(void) write(STDERR_FILENO,errbuf,sizeof errbuf);
}
}
int getopt (int argc, char * const argv [], const char * opts)
{
static int sp = 1, error = (int) '?';
static char sw = '-', eos = '\0', arg = ':';
register char c, * cp;
#ifdef DF_TRACE_DEBUG
printf("DF_TRACE_DEBUG: int getopt () in getopt.c\n");
#endif
if (sp == 1)
{
if (optind >= argc || argv[optind][0] != sw
|| argv[optind][1] == eos)
return EOF;
else if (strcmp(argv[optind],"--") == 0)
{
optind++;
return EOF;
}
}
c = argv[optind][sp];
optopt = (int) c;
if (c == arg || (cp = strchr(opts,c)) == NULL)
{
ERR(argv,": illegal option--",c);
if (argv[optind][++sp] == eos)
{
optind++;
sp = 1;
}
return error;
}
else if (*++cp == arg)
{
if (argv[optind][sp + 1] != eos)
optarg = &argv[optind++][sp + 1];
else if (++optind >= argc)
{
ERR(argv,": option requires an argument--",c);
sp = 1;
return error;
}
else
optarg = argv[optind++];
sp = 1;
}
else
{
if (argv[optind][++sp] == eos)
{
sp = 1;
optind++;
}
optarg = NULL;
}
return (int) c;
}
#endif /* HAVE_GETOPT */