mozjs_sys 0.67.1

System crate for the Mozilla SpiderMonkey JavaScript engine.
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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

#!/usr/bin/env python
#
# $Id: iotop.py 1160 2011-10-14 18:50:36Z g.rodola@gmail.com $
#
# Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""
Shows real-time network statistics.

Author: Giampaolo Rodola' <g.rodola@gmail.com>

$ python scripts/nettop.py
-----------------------------------------------------------
total bytes:           sent: 1.49 G       received: 4.82 G
total packets:         sent: 7338724      received: 8082712

wlan0                     TOTAL         PER-SEC
-----------------------------------------------------------
bytes-sent               1.29 G        0.00 B/s
bytes-recv               3.48 G        0.00 B/s
pkts-sent               7221782               0
pkts-recv               6753724               0

eth1                      TOTAL         PER-SEC
-----------------------------------------------------------
bytes-sent             131.77 M        0.00 B/s
bytes-recv               1.28 G        0.00 B/s
pkts-sent                     0               0
pkts-recv               1214470               0
"""

import atexit
import time
import sys
try:
    import curses
except ImportError:
    sys.exit('platform not supported')

import psutil


# --- curses stuff
def tear_down():
    win.keypad(0)
    curses.nocbreak()
    curses.echo()
    curses.endwin()


win = curses.initscr()
atexit.register(tear_down)
curses.endwin()
lineno = 0


def print_line(line, highlight=False):
    """A thin wrapper around curses's addstr()."""
    global lineno
    try:
        if highlight:
            line += " " * (win.getmaxyx()[1] - len(line))
            win.addstr(lineno, 0, line, curses.A_REVERSE)
        else:
            win.addstr(lineno, 0, line, 0)
    except curses.error:
        lineno = 0
        win.refresh()
        raise
    else:
        lineno += 1
# --- curses stuff


def bytes2human(n):
    """
    >>> bytes2human(10000)
    '9.8 K'
    >>> bytes2human(100001221)
    '95.4 M'
    """
    symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
    prefix = {}
    for i, s in enumerate(symbols):
        prefix[s] = 1 << (i + 1) * 10
    for s in reversed(symbols):
        if n >= prefix[s]:
            value = float(n) / prefix[s]
            return '%.2f %s' % (value, s)
    return '%.2f B' % (n)


def poll(interval):
    """Retrieve raw stats within an interval window."""
    tot_before = psutil.net_io_counters()
    pnic_before = psutil.net_io_counters(pernic=True)
    # sleep some time
    time.sleep(interval)
    tot_after = psutil.net_io_counters()
    pnic_after = psutil.net_io_counters(pernic=True)
    return (tot_before, tot_after, pnic_before, pnic_after)


def refresh_window(tot_before, tot_after, pnic_before, pnic_after):
    """Print stats on screen."""
    global lineno

    # totals
    print_line("total bytes:           sent: %-10s   received: %s" % (
        bytes2human(tot_after.bytes_sent),
        bytes2human(tot_after.bytes_recv))
    )
    print_line("total packets:         sent: %-10s   received: %s" % (
        tot_after.packets_sent, tot_after.packets_recv))

    # per-network interface details: let's sort network interfaces so
    # that the ones which generated more traffic are shown first
    print_line("")
    nic_names = list(pnic_after.keys())
    nic_names.sort(key=lambda x: sum(pnic_after[x]), reverse=True)
    for name in nic_names:
        stats_before = pnic_before[name]
        stats_after = pnic_after[name]
        templ = "%-15s %15s %15s"
        print_line(templ % (name, "TOTAL", "PER-SEC"), highlight=True)
        print_line(templ % (
            "bytes-sent",
            bytes2human(stats_after.bytes_sent),
            bytes2human(
                stats_after.bytes_sent - stats_before.bytes_sent) + '/s',
        ))
        print_line(templ % (
            "bytes-recv",
            bytes2human(stats_after.bytes_recv),
            bytes2human(
                stats_after.bytes_recv - stats_before.bytes_recv) + '/s',
        ))
        print_line(templ % (
            "pkts-sent",
            stats_after.packets_sent,
            stats_after.packets_sent - stats_before.packets_sent,
        ))
        print_line(templ % (
            "pkts-recv",
            stats_after.packets_recv,
            stats_after.packets_recv - stats_before.packets_recv,
        ))
        print_line("")
    win.refresh()
    lineno = 0


def main():
    try:
        interval = 0
        while True:
            args = poll(interval)
            refresh_window(*args)
            interval = 1
    except (KeyboardInterrupt, SystemExit):
        pass


if __name__ == '__main__':
    main()