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86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
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/*
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Newsgroups: mod.std.unix
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Subject: public domain AT&T getopt source
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Date: 3 Nov 85 19:34:15 GMT
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Here's something you've all been waiting for: the AT&T public domain
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source for getopt(3). It is the code which was given out at the 1985
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UNIFORUM conference in Dallas. I obtained it by electronic mail
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directly from AT&T. The people there assure me that it is indeed
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in the public domain.
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*/
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/*LINTLIBRARY*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "patch.h"
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#ifdef HAVE_NO_GETOPT
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#define EOF (-1)
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#define ERR(s, c) \
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if (opterr) { \
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char errbuf[2]; \
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errbuf[0] = c; errbuf[1] = '\n'; \
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(void) printf("%s", argv[0]); \
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(void) printf("%s", s); \
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(void) printf("%s", errbuf); \
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}
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int opterr;
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int optind;
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int optopt;
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char *optarg;
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int getopt(int argc, char * const argv[], char *opts)
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{
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static int sp = 1;
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register int c;
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register char *cp;
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static int call_first = 1;
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if (call_first) {
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opterr = 1;
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optind = 1;
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call_first = 0;
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}
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if(sp == 1)
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if(optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0')
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return(EOF);
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else if(strcmp(argv[optind], "--") == 0) {
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optind++;
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return(EOF);
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}
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optopt = c = argv[optind][sp];
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if(c == ':' || (cp=strchr(opts, c)) == NULL) {
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ERR(": illegal option -- ", c);
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if(argv[optind][++sp] == '\0') {
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optind++;
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sp = 1;
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}
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return('?');
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}
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if(*++cp == ':') {
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if(argv[optind][sp+1] != '\0')
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optarg = &argv[optind++][sp+1];
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else if(++optind >= argc) {
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ERR(": option requires an argument -- ", c);
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sp = 1;
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return('?');
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} else
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optarg = argv[optind++];
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sp = 1;
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} else {
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if(argv[optind][++sp] == '\0') {
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sp = 1;
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optind++;
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}
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optarg = NULL;
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}
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return(c);
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}
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#endif /* HAVE_NO_GETOPT */
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