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- 1.2
- date 94.01.11.19.51.38; author jasegler; state Exp;
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- 1.1
- date 94.01.11.19.04.47; author jasegler; state Exp;
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- 1.2
- log
- @*** empty log message ***
- @
- text
- @/*
- ** @@(#)getopt.c 2.5 (smail) 9/15/87
- */
-
- /*
- * 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.
- */
-
- #include <stdlib.h>
- #include <string.h>
- #include <stdio.h>
-
- /*LINTLIBRARY */
- #define EOF (-1)
- #define ERR(s, c)\
- if(opterr) { fprintf(stderr, "%s%s%lc\n", argv[0], s, c); }
-
- int opterr = 1;
- int optind = 1;
- int optopt;
- char *optarg;
-
- int
- getopt (int argc, char *const *argv, const char *opts)
- {
- static int sp = 1;
- register long 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 = index (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);
- }
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @d43 1
- a43 1
- register int c;
- @
-