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- 1.2
- date 90.10.29.13.19.34; author kupfer; state Exp;
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- 1.1
- date 90.10.29.11.59.45; author kupfer; state Exp;
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-
- desc
- @Program that shell scripts can use to parse their arguments.
- @
-
-
- 1.2
- log
- @Take out ATT getopt subroutine. Make sure results include trailing
- newline.
- @
- text
- @/*
- ** GETOPT PROGRAM AND LIBRARY ROUTINE
- **
- ** I wrote main() and AT&T wrote getopt() and we both put our efforts into
- ** the public domain via mod.sources.
- ** Rich $alz
- ** Mirror Systems
- ** (mirror!rs, rs@@mirror.TMC.COM)
- ** August 10, 1986
- */
-
- /* $Header$ */
-
- #include <stdio.h>
-
-
- #ifndef INDEX
- #define INDEX index
- #endif
-
-
- extern char *INDEX();
- extern int optind;
- extern char *optarg;
-
-
- main(ac, av)
- register int ac;
- register char *av[];
- {
- register char *flags;
- register int c;
-
- /* Check usage. */
- if (ac < 2) {
- fprintf(stderr, "usage: %s flag-specification arg-list\n", av[0]);
- exit(2);
- }
-
- /* Play games; remember the flags (first argument), then splice
- them out so it looks like a "standard" command vector. */
- flags = av[1];
- av[1] = av[0];
- av++;
- ac--;
-
- /* Print flags. */
- while ((c = getopt(ac, av, flags)) != EOF) {
- if (c == '?')
- exit(1);
- /* We assume that shells collapse multiple spaces in `` expansion. */
- printf("-%c %s ", c, INDEX(flags, c)[1] == ':' ? optarg : "");
- }
-
- /* End of flags; print rest of options. */
- printf("-- ");
- for (av += optind; *av; av++)
- printf("%s ", *av);
-
- printf("\n");
- exit(0);
- }
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @d12 2
- d59 2
- a61 81
- }
-
- /*
- ** This is the public-domain AT&T getopt(3) code. I added the
- ** #ifndef stuff because I include <stdio.h> for the program;
- ** getopt, per se, doesn't need it. I also added the INDEX/index
- ** hack (the original used strchr, of course). And, note that
- ** technically the casts in the write(2) calls shouldn't be there.
- */
-
- #ifndef NULL
- #define NULL 0
- #endif
- #ifndef EOF
- #define EOF (-1)
- #endif
- #ifndef INDEX
- #define INDEX index
- #endif
-
-
- #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 *INDEX();
-
- 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=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);
- @
-