Category : Word Processors
Archive   : CAWF.ZIP
Filename : GETOPT.C

 
Output of file : GETOPT.C contained in archive : CAWF.ZIP
/*
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.
*/


/*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();
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);
}


  3 Responses to “Category : Word Processors
Archive   : CAWF.ZIP
Filename : GETOPT.C

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

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