rvinterf: begin change to backslash escape output format Right now throughout the rvinterf suite, any time we emit output that is expected to be ASCII, but may contain non-printable garbage, we use 'cat -v' form of garbage character representation. Unfortunately, this transformation is lossy (can't be reversed 100% reliably in the user's wetware), hence we would like to migrate to C-style backslash escapes, including doubling of any already-present backslashes - this escape mechanism is lossless. Begin this change by converting the output of RV and L1 traces in rvinterf and rvtdump.

/*
 * The structure defined in this header file is malloced in rvinterf
 * for every client program connection.
 */

#define	MAX_RVT_INTEREST	4

typedef	unsigned u32;

struct client {
	struct	client *next;
	int	fd;
	int	rx_state;
	u_char	rx_buf[LOCALSOCK_MAX_MSG];
	int	rx_msglen;
	u_char	*rx_ptr;
	int	rx_left;
	int	int_rvt_count;
	u32	int_rvt_mask[MAX_RVT_INTEREST];
	u32	int_rvt_match[MAX_RVT_INTEREST];
	char	int_proto[12];
};