parse.c

iscsi源代码 UNH的progect 有initiator端和target端的源码

/* initiator/parse.c

	vi: set autoindent tabstop=8 shiftwidth=4 :

	This program is used to split the string returned by slptool and
	get the ipaddr, port number and iscsi-name(target name)

*/
/*
	Copyright (C) 2001-2003 InterOperability Lab (IOL)
	University of New Hampshier (UNH)
	Durham, NH 03824

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2, or (at your option)
	any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
	USA.

	The name of IOL and/or UNH may not be used to endorse or promote products
	derived from this software without specific prior written permission.
*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#define OPTIONS		":h:p:n:"
#define PORTSIZE	5

void
getinfo(char *str, int opt)
{
	char *url, *tmp, *name, *port;
	if ((tmp = strchr(str, '/')) == NULL) {
		fprintf(stderr, "invalid url-path format for the target\n");
		exit(EXIT_FAILURE);
	}
	if (*(tmp + 1) != '/') {	/* expected '//' before the url */
		fprintf(stderr, "invalid url-path format for the target\n");
		exit(EXIT_FAILURE);
	}
	tmp += 2;
	url = strchr(tmp, ':');
	if (url == NULL) {			/* no optional port number */
		if (opt == 'p') {		/* no port number in the string, use the default one */
			fprintf(stdout, "%s", "3260");
			exit(EXIT_SUCCESS);
		}
		if ((url = strchr(tmp, '/')) == NULL) {
			fprintf(stderr, "Format error: No '/' before the target name\n");
			exit(EXIT_FAILURE);
		}
		if (opt == 'n') {
			url++;
			if ((name = strchr(url, '/')) != NULL || (name = strchr(url, ',')) != NULL) {	/* string ended with identity */
				*name = '\0';
			}
			fprintf(stdout, "%s", url);
			exit(EXIT_SUCCESS);
		}
	}
	if (opt == 'h') {
		*url = '\0';
		fprintf(stdout, "%s", tmp);
		exit(EXIT_SUCCESS);
	} else {
		url++;
		if ((port = strchr(url, '/')) == NULL) {
			fprintf(stderr, "Format error: No '/' before the target name\n");
			exit(EXIT_FAILURE);
		}
		if (opt == 'p') {
			*port = '\0';
			fprintf(stdout, "%s", url);
			exit(EXIT_SUCCESS);
		} else if (opt == 'n') {
			port++;
			if ((name = strchr(port, '/')) != NULL || (name = strchr(port, ',')) != NULL) {	/* string ended with identity */
				*name = '\0';
			}
			fprintf(stdout, "%s", port);
		}
	}

}

int
main(int argc, char *argv[])
{
	int c;
	opterr = 0;

	if (argc != 3) {
		fprintf(stderr, "Useage: -h/-p/-n parse string_from_slp");
		return EXIT_FAILURE;
	}
	while ((c = getopt(argc, argv, OPTIONS)) != EOF)
		switch (c) {
		case 'h':
			getinfo(argv[2], c);
			break;
		case 'p':
			getinfo(argv[2], c);
			break;
		case 'n':
			getinfo(argv[2], c);
			break;
		case ':':
			fprintf(stderr, "missing parameter to switch: %s\n", optarg);
			return EXIT_FAILURE;
		case '?':
			fprintf(stderr, "illegal switch %c\n", optopt);
			return EXIT_FAILURE;
		}
	return EXIT_SUCCESS;
}