gw-getopt.h File Reference

Go to the source code of this file.

Functions
int	getopt (int argc, char **argv, char *opts)

Variables
int	opterr
int	optind
int	optopt
char *	optarg

Function Documentation

getopt()

int getopt	(	int	argc,
		char **	argv,
		char *	opts
	)

Definition at line 84 of file attgetopt.c.

References ERR, optarg, optind, and optopt.

Referenced by main(), and parse_options().

{
        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], "--") == 0) {
                        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);
}

Variable Documentation

optarg

char* optarg

Definition at line 82 of file attgetopt.c.

Referenced by getopt(), main(), and parse_options().

opterr

int opterr

Definition at line 79 of file attgetopt.c.

optind

int optind

Definition at line 80 of file attgetopt.c.

Referenced by getopt(), and main().

optopt

int optopt

Definition at line 81 of file attgetopt.c.

Referenced by getopt().