mirror of https://github.com/mabam/CAP.git
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
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* Relay-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site seismo.CSS.GOV
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* Posting-Version: version B 2.10.2 9/3/84; site panda.UUCP
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* Path: seismo!harvard!talcott!panda!sources-request
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* From: sources-request@panda.UUCP
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* Newsgroups: mod.sources
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* Subject: public domain AT&T getopt(3)
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* Message-ID: <1159@panda.UUCP>
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* Date: 3 Dec 85 15:22:25 GMT
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* Sender: jpn@panda.UUCP
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* Organization: IEEE/P1003 Portable Operating System Environment Committee
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* Lines: 138
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* Approved: jpn@panda.UUCP
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*
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* Mod.sources: Volume 3, Issue 58
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* Submitted by: seismo!ut-sally!jsq (John Quarterman, Moderator mod.std.unix)
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*
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* [
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* There are two articles here, forwarded from mod.std.unix. Also, the
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* getopt source code is NOT in shar format - you will have to hand
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* edit this file. - John P. Nelson, moderator, mod.sources
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* ]
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*
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* ************************
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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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*
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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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* There is no manual page. That is because the one they gave out at
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* UNIFORUM was slightly different from the current System V Release 2
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* manual page. The difference apparently involved a note about the
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* famous rules 5 and 6, recommending using white space between an option
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* and its first argument, and not grouping options that have arguments.
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* Getopt itself is currently lenient about both of these things White
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* space is allowed, but not mandatory, and the last option in a group can
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* have an argument. That particular version of the man page evidently
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* has no official existence, and my source at AT&T did not send a copy.
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* The current SVR2 man page reflects the actual behavor of this getopt.
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* However, I am not about to post a copy of anything licensed by AT&T.
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*
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* I will submit this source to Berkeley as a bug fix.
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*
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* I, personally, make no claims or guarantees of any kind about the
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* following source. I did compile it to get some confidence that
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* it arrived whole, but beyond that you're on your own.
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*/
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/*LINTLIBRARY*/
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#define NULL 0
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#define EOF (-1)
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#define ERR(s, c) if(opterr){\
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extern int strlen(), write();\
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char errbuf[2];\
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errbuf[0] = c; errbuf[1] = '\n';\
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(void) write(2, argv[0], (unsigned)strlen(argv[0]));\
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(void) write(2, s, (unsigned)strlen(s));\
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(void) write(2, errbuf, 2);}
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extern int strcmp();
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/* bsd based system will require index */
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#define strchr index
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extern char *strchr();
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int opterr = 1;
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int optind = 1;
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int optopt;
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char *optarg;
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int
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getopt(argc, argv, opts)
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int argc;
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char **argv, *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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if(sp == 1)
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if(optind >= argc ||
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argv[optind][0] != '-' || argv[optind][1] == '\0')
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return(EOF);
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else if(strcmp(argv[optind], "--") == NULL) {
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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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