BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / tests / nfs / unix-tests / getopt.c

#ifndef lint
static char NFSTestID[] = "@(#)getopt.c 1.1 Lachman ONC Test Suite source";
#endif /* lint */
/*
* 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.
*/


/*LINTLIBRARY*/
#define NULL    0
#define EOF     (-1)
#define ERR(s, c)       if(opterr){\
       extern int 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);}

#ifdef SVR3
extern char *strchr();
#else
extern char *index();
#endif

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];
#ifdef SVR3
       if(c == ':' || (cp=strchr(opts, c)) == NULL) {
#else
       if(c == ':' || (cp=index(opts, c)) == NULL) {
#endif
               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);
}

#include        <stdio.h>

main(ac, av)
char    **av;
{
       register int    i;
       int     first = 1;
       int     error = 0;
       char    buf[BUFSIZ];
       char    line[BUFSIZ];
       extern char     *optarg;
       extern int      optind;

       if (ac == 1) {
               fprintf(stderr, "usage:  getopt legal-args $*\n");
               exit(2);
       }

       line[0] = '\0';
       while ((i = getopt(ac - 1, &av[1], av[1])) != EOF) {
               if (i == '?')
                       exit(2);

               if (first) {
                       first = 0;
                       sprintf(buf, "-%c", i & 0xff);
               }
               else
                       sprintf(buf, " -%c", i & 0xff);
               strcat(line, buf);
               if (optarg) {
                       sprintf(buf, " %s", optarg);
                       strcat(line, buf);
               }
       }

       if (first)
               strcat(line, "--");
       else
               strcat(line, " --");

       optind++;
       for (; optind < ac; optind++) {
               sprintf(buf, " %s", av[optind]);
               strcat(line, buf);
       }
       printf("%s\n", line);
       exit(0);
}