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63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
/*
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* This is an unpublished work copyright (c) 1998 HELIOS Software GmbH
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* 30827 Garbsen, Germany
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*/
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#include <stdio.h>
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#include <string.h>
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#ifdef HAS_UNISTD
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# include <unistd.h>
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#endif
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char *optarg;
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int optind = 1;
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int opterr = 1;
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int optopt;
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static int subopt;
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static int suboptind = 1;
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int getopt(int argc, char *const argv[], const char * optstring)
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{
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char *curopt;
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char *p;
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int cursubopt;
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if (suboptind == optind-1 && argv[suboptind][subopt] != '\0') {
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curopt = (char *)argv[suboptind];
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} else {
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curopt = (char *)argv[optind];
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if (curopt == NULL || curopt[0] != '-' || strcmp(curopt, "-") == 0)
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return -1;
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suboptind = optind;
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subopt = 1;
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optind++;
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if (strcmp(curopt, "--") == 0)
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return -1;
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}
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cursubopt = subopt++;
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if ((p = strchr(optstring, curopt[cursubopt])) == NULL) {
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optopt = curopt[cursubopt];
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if (opterr)
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fprintf(stderr, "%s: illegal option -- %c\n", argv[0], optopt);
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return '?';
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}
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if (p[1] == ':') {
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if (curopt[cursubopt+1] != '\0') {
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optarg = curopt+cursubopt+1;
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suboptind++;
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return p[0];
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}
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if (argv[optind] == NULL) {
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optopt = p[0];
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if (opterr)
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fprintf(stderr, "%s: option requires an argument -- %c\n", argv[0], optopt);
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if (*optstring == ':')
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return ':';
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return '?';
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}
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optarg = argv[optind++];
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}
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return p[0];
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}
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