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- /*
- * getopt - parse command-line options
- */
- /* $Id$ */
- #include <stdio.h>
- #include <string.h>
- #define ERR(s, c) if(opterr){\
- fputs(argv[0], stderr);\
- fputs(s, stderr);\
- fputc(c, stderr);\
- fputc('\n', stderr);}
- int opterr = 1;
- int optind = 1;
- int optopt;
- char *optarg;
- int
- getopt(int argc, char **argv, char *opts)
- {
- static int sp = 1;
- register c;
- register char *cp;
- 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=strchr(opts, c)) == NULL) {
- ERR (": illegal option -- ", c);
- 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) {
- ERR (": option requires an argument -- ", c);
- sp = 1;
- return '?';
- } else
- optarg = argv[optind++];
- sp = 1;
- } else {
- if (argv[optind][++sp] == '\0') {
- sp = 1;
- optind++;
- }
- optarg = NULL;
- }
- return c;
- }
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