This file is indexed.

/usr/bin/usrp2_card_burner is in uhd-host 3.5.5-1.

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
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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
#!/usr/bin/env python
#
# Copyright 2010-2011 Ettus Research LLC
#
# 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
#

import platform
import tempfile
import subprocess
try:
    import urllib.request
except ImportError:
    import urllib
    urllib.request = urllib
import optparse
import math
import os
import re

########################################################################
# constants
########################################################################
SECTOR_SIZE = 512                 # bytes
MAX_FILE_SIZE =  1 * (2**20)      # maximum number of bytes we'll burn to a slot

FPGA_OFFSET = 0                   # offset in flash to fpga image
FIRMWARE_OFFSET = 1 * (2**20)     # offset in flash to firmware image

MAX_SD_CARD_SIZE = 2048e6         # bytes (any bigger is sdhc)

########################################################################
# helper functions
########################################################################
def command(*args):
    p = subprocess.Popen(
        args,
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
    )
    ret = p.wait()
    verbose = p.stdout.read().decode('utf-8')
    if ret != 0: raise Exception(verbose)
    return verbose

def get_dd_path():
    if platform.system() == 'Windows':
        dd_path = os.path.join(os.path.dirname(__file__), 'dd.exe')
        if os.path.exists(dd_path): return dd_path
        dd_path = os.path.join(tempfile.gettempdir(), 'dd.exe')
        if not os.path.exists(dd_path):
            print('Downloading dd.exe to %s'%dd_path)
            dd_bin = urllib.request.urlopen('http://files.ettus.com/dd.exe').read()
            open(dd_path, 'wb').write(dd_bin)
        return dd_path
    return 'dd'

def int_ceil_div(num, den):
    return int(math.ceil(float(num)/float(den)))

def get_tmp_file():
    tmp = tempfile.mkstemp()
    os.close(tmp[0])
    return tmp[1]

########################################################################
# list possible devices
########################################################################
def get_raw_device_hints():
    ####################################################################
    # Platform Windows: parse the output of dd.exe --list
    ####################################################################
    if platform.system() == 'Windows':
        def extract_info_value(info, key):
            return info.split(key)[-1].split()[0]
        def get_info_list(output):
            in_info = False
            for line in output.splitlines():
                if line.startswith('\\\\'): in_info = True; info = ''
                elif in_info and not line.strip(): in_info = False; yield info
                if in_info: info += '\n'+line.strip()
        def is_info_valid(info):
            try:
                if 'link to' not in info: return False
                #handles two spellings of remov(e)able:
                if 'remov' not in info.lower(): return False
                if 'size is' in info and int(extract_info_value(info, 'size is')) > MAX_SD_CARD_SIZE: return False
            except: return False
            return True
        def extract_info_name(info):
            for key in ('Mounted on', 'link to'):
                if key in info: return extract_info_value(info, key)
            return info.splitlines()[0].strip()

        return sorted(set(map(extract_info_name, list(filter(is_info_valid, get_info_list(command(get_dd_path(), '--list')))))))

    ####################################################################
    # Platform Linux: parse procfs /proc/partitions
    ####################################################################
    if platform.system() == 'Linux':
        devs = list()
        for line in command('cat', '/proc/partitions').splitlines():
            try:
                major, minor, blocks, name = line.split()
                if not name[-1].isdigit() and int(minor) == 0: continue
                if int(blocks)*1024 > MAX_SD_CARD_SIZE: continue
            except: continue
            devs.append(os.path.join('/dev', name))

        return sorted(set(devs))

    ####################################################################
    # Platform Mac OS X: parse diskutil list and info commands
    ####################################################################
    if platform.system() == 'Darwin':
        devs = [d.split()[0] for d in [l for l in command('diskutil', 'list').splitlines() if l.startswith('/dev')]]
        def output_to_info(output):
            return dict([list(map(lambda x: x.strip(), pair.lower().split(':'))) for pair in [l for l in output.splitlines() if ':' in l]])
        def is_dev_valid(dev):
            info = output_to_info(command('diskutil', 'info', dev))
            try:
                if 'internal' in info and info['internal'] == 'yes': return False
                if 'ejectable' in info and info['ejectable'] == 'no': return False
                if 'total size' in info:
                    size_match = re.match('^.*\((\d+)\s*bytes\).*$', info['total size'])
                    if size_match and int(size_match.groups()[0]) > MAX_SD_CARD_SIZE: return False
            except: return False
            return True

        return sorted(set(filter(is_dev_valid, devs)))

    ####################################################################
    # Platform Others:
    ####################################################################
    return ()

########################################################################
# write and verify with dd
########################################################################
def verify_image(image_file, device_file, offset):
    #create a temporary file to store the readback image
    tmp_file = get_tmp_file()

    #read the image data
    img_data = open(image_file, 'rb').read()
    count = int_ceil_div(len(img_data), SECTOR_SIZE)

    #execute a dd subprocess
    verbose = command(
        get_dd_path(),
        "of=%s"%tmp_file,
        "if=%s"%device_file,
        "skip=%d"%(offset/SECTOR_SIZE),
        "bs=%d"%SECTOR_SIZE,
        "count=%d"%count,
    )

    #verfy the data
    tmp_data = open(tmp_file, 'rb').read(len(img_data))
    if img_data != tmp_data: return 'Verification Failed:\n%s'%verbose
    return 'Verification Passed:\n%s'%verbose

def write_image(image_file, device_file, offset):
    #create a temporary file to store the padded image
    tmp_file = get_tmp_file()

    #write the padded image data
    img_data = open(image_file, 'rb').read()
    count = int_ceil_div(len(img_data), SECTOR_SIZE)
    pad_len = SECTOR_SIZE*count - len(img_data)
    padding = bytes(b'\x00')*pad_len #zero-padding
    open(tmp_file, 'wb').write(img_data + padding)

    #execute a dd subprocess
    verbose = command(
        get_dd_path(),
        "if=%s"%tmp_file,
        "of=%s"%device_file,
        "seek=%d"%(offset/SECTOR_SIZE),
        "bs=%d"%SECTOR_SIZE,
        "count=%d"%count,
    )

    try: #exec the sync command (only works on linux)
        if platform.system() == 'Linux': command('sync')
    except: pass

    return verbose

def write_and_verify(image_file, device_file, offset):
    if os.path.getsize(image_file) > MAX_FILE_SIZE:
        raise Exception('Image file larger than %d bytes!'%MAX_FILE_SIZE)
    return '%s\n%s'%(
        write_image(
            image_file=image_file,
            device_file=device_file,
            offset=offset,
        ), verify_image(
            image_file=image_file,
            device_file=device_file,
            offset=offset,
        ),
    )

def burn_sd_card(dev, fw, fpga):
    verbose = ''
    if fw: verbose += 'Burn firmware image:\n%s\n'%write_and_verify(
        image_file=fw, device_file=dev, offset=FIRMWARE_OFFSET
    )
    if fpga: verbose += 'Burn fpga image:\n%s\n'%write_and_verify(
        image_file=fpga, device_file=dev, offset=FPGA_OFFSET
    )
    return verbose

########################################################################
# command line options
########################################################################
def get_options():
    parser = optparse.OptionParser()
    parser.add_option("--dev",  type="string",       help="raw device path",                default='')
    parser.add_option("--fw",   type="string",       help="firmware image path (optional)", default='')
    parser.add_option("--fpga", type="string",       help="fpga image path (optional)",     default='')
    parser.add_option("--list", action="store_true", help="list possible raw devices",      default=False)
    parser.add_option("--force", action="store_true", help="override safety check",         default=False)
    (options, args) = parser.parse_args()

    return options

########################################################################
# main
########################################################################
if __name__=='__main__':
    options = get_options()
    device_hints = get_raw_device_hints()
    show_listing = options.list

    if not show_listing and not options.force and options.dev and options.dev not in device_hints:
        print('The device "%s" was not in the list of possible raw devices.'%options.dev)
        print('The card burner application will now exit without burning your card.')
        print('To override this safety check, specify the --force option.\n')
        show_listing = True

    if show_listing:
        print('Possible raw devices:')
        print('  ' + '\n  '.join(device_hints))
        exit()

    if not options.dev: raise Exception('no raw device path specified')
    print(burn_sd_card(dev=options.dev, fw=options.fw, fpga=options.fpga))