2 * Copyright (c) 1987, 1993, 1994
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32 int opterr = 1, /* if error message should be printed */
33 optind = 1, /* index into parent argv vector */
34 optopt, /* character checked for validity */
35 optreset; /* reset getopt */
36 char *optarg; /* argument associated with option */
38 #define BADCH (int)'?'
39 #define BADARG (int)':'
41 static char EMSG[] = "";
45 * Parse argc/argv argument vector.
48 getopt(int nargc, char *nargv[], const char *ostr)
50 static char *place = EMSG; /* option letter processing */
51 const char *oli; /* option letter list index */
53 if (optreset || *place == 0) { /* update scanning pointer */
55 place = nargv[optind];
56 if (optind >= nargc || *place++ != '-') {
57 /* Argument is absent or is not an option */
62 if (optopt == '-' && *place == 0) {
63 /* "--" => end of options */
69 /* Solitary '-', treat as a '-' option
70 if the program (eg su) is looking for it. */
72 if (strchr(ostr, '-') == NULL)
79 /* See if option letter is one the caller wanted... */
80 if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) {
83 if (opterr && *ostr != ':')
85 "%s: illegal option -- %c\n", _getprogname(),
90 /* Does this option need an argument? */
92 /* don't need argument */
97 /* Option-argument is either the rest of this argument or the
98 entire next argument. */
101 else if (nargc > ++optind)
102 optarg = nargv[optind];
104 /* option-argument absent */
109 (void)fprintf(stderr,
110 "%s: option requires an argument -- %c\n",
111 _getprogname(), optopt);
117 return (optopt); /* return option letter */