4 * Standard UNIX getopt function. Code is from BSD.
6 * Copyright (c) 1987-2002 The Regents of the University of California.
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35 * static char sccsid[] = "@(#)getopt.c 8.2 (Berkeley) 4/2/94";
44 int opterr = 1, /* if error message should be printed */
45 optind = 1, /* index into parent argv vector */
46 optopt, /* character checked for validity */
47 optreset; /* reset getopt */
48 char *optarg; /* argument associated with option */
50 #define BADCH (int)'?'
51 #define BADARG (int)':'
56 * Parse argc/argv argument vector.
63 static char *place = EMSG; /* option letter processing */
64 char *oli; /* option letter list index */
66 if (optreset || !*place) { /* update scanning pointer */
68 if (optind >= nargc || *(place = nargv[optind]) != '-') {
72 if (place[1] && *++place == '-') { /* found "--" */
77 } /* option letter okay? */
78 if ((optopt = (int)*place++) == (int)':' ||
79 !(oli = (char*) strchr(ostr, optopt))) {
81 * if the user didn't specify '-' as an option,
82 * assume it means EOF.
84 if (optopt == (int)'-')
88 if (opterr && *ostr != ':')
90 "illegal option -- %c\n", optopt);
93 if (*++oli != ':') { /* don't need argument */
98 else { /* need an argument */
99 if (*place) /* no white space */
101 else if (nargc <= ++optind) { /* no arg */
106 (void)fprintf(stderr,
107 "option requires an argument -- %c\n",
111 else /* white space */
112 optarg = nargv[optind];
116 return (optopt); /* dump back option letter */