/usr/sbin/rsusers is in ax25-tools 0.0.8-13.2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | #! /bin/sh
ALL=n
if [ $# = 1 ]; then
    ALL=y
fi
echo "Linux/ROSE 001. AX.25, NET/ROM and ROSE Users."
if [ -r /proc/net/ax25 ]; then
    cat /proc/net/ax25 | awk '
	BEGIN  {
		printf "Active AX.25 Sessions\n"
		printf "Dest       Source     State\n"
		n = 0
	       }
	NR > 1 {
		if ($4 == 0) {
		    state = "LISTENING"
		} else if ($4 == 1) {
		    state = "CONNECTING"
		} else if ($4 == 2) {
		    state = "DISCONNECTING"
		} else if ($4 == 3) {
		    state = "CONNECTED"
		} else {
		    state = "RECOVERY"
		}
		if ($4 != 0) {
		    printf "%-9s  %-9s  %s\n", $1, $2, state
		    n++
		} else {
		    if (ALL == "y") {
			printf "%-9s  %-9s  %s\n", $1, $2, state
			n++
		    }
		}
	       }
	END    {
		    if (n == 0) {
			printf "None active\n"
		    }
	       }' ALL=$ALL
	echo
fi
if [ -r /proc/net/nr ]; then
    cat /proc/net/nr | awk '
	BEGIN  {
		printf "Active NET/ROM Sessions\n"
		printf "User       Dest       Source     State\n"
		n = 0
	       }
	NR > 1 {
		if ($7 == 0) {
		    state = "LISTENING"
		} else if ($7 == 1) {
		    state = "CONNECTING"
		} else if ($7 == 2) {
		    state = "DISCONNECTING"
		} else if ($7 == 3) {
		    state = "CONNECTED"
		} else {
		    state = "RECOVERY"
		}
		if ($7 != 0) {
		    printf "%-9s  %-9s  %-9s  %s\n", $1, $2, $3, state
		    n++
		} else {
		    if (ALL == "y") {
			printf "%-9s  %-9s  %-9s  %s\n", $1, $2, $3, state
			n++
		    }
		}
	       }
	END    {
		    if (n == 0) {
			printf "None active\n"
		    }
	       }' ALL=$ALL
	echo
fi
if [ -r /proc/net/rose ]; then
    cat /proc/net/rose | awk '
	BEGIN  {
		printf "Active ROSE Sessions\n"
		printf "Dest                   Source                 State\n"
		n = 0
	       }
	NR > 1 {
		if ($7 == 0) {
		    state = "LISTENING"
		} else if ($7 == 1) {
		    state = "CONNECTING"
		} else if ($7 == 2) {
		    state = "DISCONNECTING"
		} else if ($7 == 3) {
		    state = "CONNECTED"
		} else {
		    state = "RESETTING"
		}
		if ($7 != 0) {
		    printf "%-10s  %-9s  %-10s  %-9s  %s\n", $1, $2, $3, $4, state
		    n++
		} else {
		    if (ALL == "y") {
			printf "%-10s  %-9s  %-10s  %-9s  %s\n", $1, $2, $3, $4, state
			n++
		    }
		}
	       }
	END    {
		    if (n == 0) {
			printf "None active\n"
		    }
	       }' ALL=$ALL
	echo
fi
exit 0
 |