strncpy(ptr+1, fwd, sizeof(cfg->portfwd) - i);
strncpy(ptr, fwd, sizeof(cfg->portfwd) - i - 2);
int cmdline_process_param(char *p, char *value, int need_save, Config *cfg){    int ret = 0;    if (!strcmp(p, "-load")) {	RETURN(2);	/* This parameter must be processed immediately rather than being	 * saved. */	do_defaults(value, cfg);	loaded_session = TRUE;	return 2;    }    if (!strcmp(p, "-ssh")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	default_protocol = cfg->protocol = PROT_SSH;	default_port = cfg->port = 22;	return 1;    }    if (!strcmp(p, "-telnet")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	default_protocol = cfg->protocol = PROT_TELNET;	default_port = cfg->port = 23;	return 1;    }    if (!strcmp(p, "-rlogin")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	default_protocol = cfg->protocol = PROT_RLOGIN;	default_port = cfg->port = 513;	return 1;    }    if (!strcmp(p, "-raw")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	default_protocol = cfg->protocol = PROT_RAW;    }    if (!strcmp(p, "-v")) {	RETURN(1);	flags |= FLAG_VERBOSE;    }    if (!strcmp(p, "-l")) {	RETURN(2);	UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);	SAVEABLE(0);	strncpy(cfg->username, value, sizeof(cfg->username));	cfg->username[sizeof(cfg->username) - 1] = '\0';    }    if ((!strcmp(p, "-L") || !strcmp(p, "-R") || !strcmp(p, "-D"))) {	char *fwd, *ptr, *q, *qq;	int dynamic, i=0;	RETURN(2);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	dynamic = !strcmp(p, "-D");	fwd = value;	ptr = cfg->portfwd;	/* if multiple forwards, find end of list */	if (ptr[0]=='R' || ptr[0]=='L' || ptr[0] == 'D') {	    for (i = 0; i < sizeof(cfg->portfwd) - 2; i++)		if (ptr[i]=='\000' && ptr[i+1]=='\000')		    break;	    ptr = ptr + i + 1;  /* point to next forward slot */	}	ptr[0] = p[1];  /* insert a 'L', 'R' or 'D' at the start */	if (strlen(fwd) > sizeof(cfg->portfwd) - i - 2) {	    cmdline_error("out of space for port forwardings");	    return ret;	}	strncpy(ptr+1, fwd, sizeof(cfg->portfwd) - i);	if (!dynamic) {	    /*	     * We expect _at least_ two colons in this string. The	     * possible formats are `sourceport:desthost:destport',	     * or `sourceip:sourceport:desthost:destport' if you're	     * specifying a particular loopback address. We need to	     * replace the one between source and dest with a \t;	     * this means we must find the second-to-last colon in	     * the string.	     */	    q = qq = strchr(ptr, ':');	    while (qq) {		char *qqq = strchr(qq+1, ':');		if (qqq)		    q = qq;		qq = qqq;	    }	    if (q) *q = '\t';	       /* replace second-last colon with \t */	}	cfg->portfwd[sizeof(cfg->portfwd) - 1] = '\0';	cfg->portfwd[sizeof(cfg->portfwd) - 2] = '\0';	ptr[strlen(ptr)+1] = '\000';    /* append two '\000' */    }    if (!strcmp(p, "-m")) {	char *filename, *command;	int cmdlen, cmdsize;	FILE *fp;	int c, d;	RETURN(2);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	filename = value;	cmdlen = cmdsize = 0;	command = NULL;	fp = fopen(filename, "r");	if (!fp) {	    cmdline_error("unable to open command "			  "file \"%s\"", filename);	    return ret;	}	do {	    c = fgetc(fp);	    d = c;	    if (c == EOF)		d = 0;	    if (cmdlen >= cmdsize) {		cmdsize = cmdlen + 512;		command = sresize(command, cmdsize, char);	    }	    command[cmdlen++] = d;	} while (c != EOF);	cfg->remote_cmd_ptr = command;	cfg->remote_cmd_ptr2 = NULL;	cfg->nopty = TRUE;      /* command => no terminal */    }    if (!strcmp(p, "-P")) {	RETURN(2);	UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);	SAVEABLE(1);		       /* lower priority than -ssh,-telnet */	cfg->port = atoi(value);    }    if (!strcmp(p, "-pw")) {	RETURN(2);	UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);	cmdline_password = value;	ssh_get_line = cmdline_get_line;	ssh_getline_pw_only = TRUE;    }    if (!strcmp(p, "-A")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->agentfwd = 1;    }    if (!strcmp(p, "-a")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->agentfwd = 0;    }    if (!strcmp(p, "-X")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->x11_forward = 1;    }    if (!strcmp(p, "-x")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->x11_forward = 0;    }    if (!strcmp(p, "-t")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->nopty = 0;    }    if (!strcmp(p, "-T")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->nopty = 1;    }    if (!strcmp(p, "-N")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->ssh_no_shell = 1;    }    if (!strcmp(p, "-C")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->compression = 1;    }    if (!strcmp(p, "-1")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->sshprot = 0;	       /* ssh protocol 1 only */    }    if (!strcmp(p, "-2")) {	RETURN(1);	UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->sshprot = 3;	       /* ssh protocol 2 only */    }    if (!strcmp(p, "-i")) {	RETURN(2);	UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);	SAVEABLE(0);	cfg->keyfile = filename_from_str(value);    }    if (!strcmp(p, "-4") || !strcmp(p, "-ipv4")) {	RETURN(1);	SAVEABLE(1);	cfg->addressfamily = ADDRTYPE_IPV4;    }    if (!strcmp(p, "-6") || !strcmp(p, "-ipv6")) {	RETURN(1);	SAVEABLE(1);	cfg->addressfamily = ADDRTYPE_IPV6;    }    return ret;			       /* unrecognised */}