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/*
* Relay-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site seismo.CSS.GOV
* Posting-Version: version B 2.10.2 9/3/84; site panda.UUCP
* Path: seismo!harvard!talcott!panda!sources-request
* From: sources-request@panda.UUCP
* Newsgroups: mod.sources
* Subject: public domain AT&T getopt(3)
* Message-ID: <1159@panda.UUCP>
* Date: 3 Dec 85 15:22:25 GMT
* Sender: jpn@panda.UUCP
* Organization: IEEE/P1003 Portable Operating System Environment Committee
* Lines: 138
* Approved: jpn@panda.UUCP
*
* Mod.sources: Volume 3, Issue 58
* Submitted by: seismo!ut-sally!jsq (John Quarterman, Moderator mod.std.unix)
*
* [
* There are two articles here, forwarded from mod.std.unix. Also, the
* getopt source code is NOT in shar format - you will have to hand
* edit this file. - John P. Nelson, moderator, mod.sources
* ]
*
* ************************
*
* Newsgroups: mod.std.unix
* Subject: public domain AT&T getopt source
* Date: 3 Nov 85 19:34:15 GMT
*
* Here's something you've all been waiting for: the AT&T public domain
* source for getopt(3). It is the code which was given out at the 1985
* UNIFORUM conference in Dallas. I obtained it by electronic mail
* directly from AT&T. The people there assure me that it is indeed
* in the public domain.
*
* There is no manual page. That is because the one they gave out at
* UNIFORUM was slightly different from the current System V Release 2
* manual page. The difference apparently involved a note about the
* famous rules 5 and 6, recommending using white space between an option
* and its first argument, and not grouping options that have arguments.
* Getopt itself is currently lenient about both of these things White
* space is allowed, but not mandatory, and the last option in a group can
* have an argument. That particular version of the man page evidently
* has no official existence, and my source at AT&T did not send a copy.
* The current SVR2 man page reflects the actual behavor of this getopt.
* However, I am not about to post a copy of anything licensed by AT&T.
*
* I will submit this source to Berkeley as a bug fix.
*
* I, personally, make no claims or guarantees of any kind about the
* following source. I did compile it to get some confidence that
* it arrived whole, but beyond that you're on your own.
*/
/*LINTLIBRARY*/
#define NULL 0
#define EOF (-1)
#define ERR(s, c) if(opterr){\
extern int strlen(), write();\
char errbuf[2];\
errbuf[0] = c; errbuf[1] = '\n';\
(void) write(2, argv[0], (unsigned)strlen(argv[0]));\
(void) write(2, s, (unsigned)strlen(s));\
(void) write(2, errbuf, 2);}
extern int strcmp();
/* bsd based system will require index */
#define strchr index
extern char *strchr();
int opterr = 1;
int optind = 1;
int optopt;
char *optarg;
int
getopt(argc, argv, opts)
int argc;
char **argv, *opts;
{
static int sp = 1;
register int c;
register char *cp;
if(sp == 1)
if(optind >= argc ||
argv[optind][0] != '-' || argv[optind][1] == '\0')
return(EOF);
else if(strcmp(argv[optind], "--") == NULL) {
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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