1 /*
2 Copyright (C) Slava Astashonok <sla@0n.ru>
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License.
6
7 $Id: my_getopt.c,v 1.2.2.3 2004/02/02 08:06:24 sla Exp $
8 */
9
10 #include <common.h>
11
12 /* getopt() */
13 #include <unistd.h>
14
15 /* fprintf() */
16 #include <stdio.h>
17
18 #include <my_getopt.h>
19
20 extern char *optarg;
21 extern int optind, opterr, optopt;
22
my_getopt(int argc,char * const argv[],struct getopt_parms parms[])23 int my_getopt(int argc, char * const argv[],
24 struct getopt_parms parms[])
25 {
26 int c, i, p;
27 static int flag = 0, my_opterr = 1;
28 static char optstring[MY_GETOPT_MAX_OPTSTR];
29
30 if (flag++ == 0) {
31 p = 0; i = 0;
32 while ((parms[i].name != 0) && (p < (MY_GETOPT_MAX_OPTSTR - 1))) {
33 optstring[p++] = parms[i].name;
34 if (parms[i].flag & MY_GETOPT_ARG_REQUIRED) optstring[p++] = ':';
35 optstring[p] = 0;
36 i++;
37 }
38 flag = 1;
39 }
40
41 c = getopt(argc, argv, optstring);
42 switch (c) {
43 case '?':
44 if (my_opterr) fprintf(stderr, "Wrong parameters\n");
45 break;
46
47 case -1:
48 flag = 0;
49 i = 0;
50 while (parms[i].name != 0) {
51 if ((parms[i].flag & MY_GETOPT_REQUIRED) && (parms[i].count == 0)) {
52 if (my_opterr) fprintf(stderr, "Missing required option\n");
53 return '?';
54 }
55 i++;
56 }
57 break;
58
59 default:
60 i = 0;
61 while ((parms[i].name != 0) && (parms[i].name != c)) {
62 i++;
63 }
64 if (parms[i].flag & MY_GETOPT_ARG_REQUIRED) {
65 if (optarg == 0) {
66 if (my_opterr) fprintf(stderr, "Option `-%c': %s\n",
67 c, "require parameter");
68 return '?';
69 } else parms[i].arg = optarg;
70 }
71 if ((++parms[i].count > 1) && !(parms[i].flag & MY_GETOPT_ALLOW_REPEAT)) {
72 if (my_opterr) fprintf(stderr, "Option `-%c': %s\n",
73 c, "repeat not allowed");
74 return '?';
75 }
76 break;
77 }
78 return c;
79 }
80