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- /*
- * GETOPT.C
- * System V like command line option parser
- */
-
- /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
- /* ! This function is a modified version of getopt() `stolen' from ! */
- /* ! the public domain electronic mail system ELM version 2.3 ! */
- /* ! (C) Copyright 1986, 1987, by Dave Taylor ! */
- /* ! (C) Copyright 1988, 1989, 1990, USENET Community Trust ! */
- /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
-
- #include <stdio.h>
-
- #ifdef SYSV
- #define index(s, c) strchr(s, c)
- extern char *strchr();
- #else
- extern char *index();
- #endif
-
- int opterr = 1; /* Error handling flag */
- int optind = 1; /* Index in argv */
- int optopt; /* Current option */
- char *optarg; /* Option argument */
-
- getopt(argc, argv, opts)
- register int argc;
- register char **argv, *opts;
- {
- static int sp = 1;
- register char *cp;
- register int c;
-
- if(sp == 1)
- if(optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0')
- return(EOF);
- else if( !strcmp(argv[optind], "--")) {
- optind++;
- return(EOF);
- }
- optopt = c = argv[optind][sp];
- if(c == ':' || (cp = index(opts, c)) == NULL) {
- if(opterr)
- (void) fprintf(stderr, "%s: illegal option -- %c\n", argv[0], c);
- else if(argv[optind][++sp] == '\0') {
- optind++;
- sp = 1;
- }
- return('?');
- }
- if(*++cp == ':') {
- if(argv[optind][sp+1] != '\0')
- optarg = &argv[optind++][sp+1];
- else if(++optind >= argc) {
- if(opterr)
- (void) fprintf(stderr, "%s: option requires an argument -- %c\n",
- argv[0], c);
- sp = 1;
- return('?');
- }
- else
- optarg = argv[optind++];
- sp = 1;
- }
- else {
- if(argv[optind][++sp] == '\0') {
- sp = 1;
- optind++;
- }
- optarg = NULL;
- }
- return(c);
-
- } /* getopt() */
-
-