annotate tests/f @ 49873:e9d06ed64161

tests: drop py2 support from `f` utility
author Matt Harbison <matt_harbison@yahoo.com>
date Tue, 03 Jan 2023 23:49:05 -0500
parents 9172bd49cedc
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2
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3 """
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4 Utility for inspecting files in various ways.
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5
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6 This tool is like the collection of tools found in a unix environment but are
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7 cross platform and stable and suitable for our needs in the test suite.
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8
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9 This can be used instead of tools like:
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10 [
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11 dd
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12 find
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13 head
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14 hexdump
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15 ls
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16 md5sum
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17 readlink
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18 sha1sum
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19 stat
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20 tail
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21 test
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22 readlink.py
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23 md5sum.py
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24 """
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25
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26
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27 import binascii
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28 import glob
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29 import hashlib
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30 import optparse
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31 import os
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32 import re
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33 import sys
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34
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35
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36 def iterbytes(s):
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37 for i in range(len(s)):
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38 yield s[i : i + 1]
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39
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40
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41 def visit(opts, filenames, outfile):
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42 """Process filenames in the way specified in opts, writing output to
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43 outfile."""
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44 for f in sorted(filenames):
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45 isstdin = f == '-'
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46 if not isstdin and not os.path.lexists(f):
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47 outfile.write(b'%s: file not found\n' % f.encode('utf-8'))
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48 continue
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49 quiet = opts.quiet and not opts.recurse or isstdin
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50 isdir = os.path.isdir(f)
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51 islink = os.path.islink(f)
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52 isfile = os.path.isfile(f) and not islink
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53 dirfiles = None
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54 content = None
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55 facts = []
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56 if isfile:
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57 if opts.type:
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58 facts.append(b'file')
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59 needs_reading = (
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60 opts.hexdump,
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61 opts.dump,
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62 opts.md5,
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63 opts.sha1,
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64 opts.raw_sha1,
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65 opts.sha256,
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66 )
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67
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68 if any(needs_reading):
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69 with open(f, 'rb') as fobj:
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70 content = fobj.read()
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71 elif islink:
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72 if opts.type:
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73 facts.append(b'link')
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74 content = os.readlink(f).encode('utf8')
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75 elif isstdin:
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76 content = getattr(sys.stdin, 'buffer', sys.stdin).read()
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77 if opts.size:
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78 facts.append(b'size=%d' % len(content))
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79 elif isdir:
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80 if opts.recurse or opts.type:
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81 dirfiles = glob.glob(f + '/*')
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82 facts.append(b'directory with %d files' % len(dirfiles))
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83 elif opts.type:
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84 facts.append(b'type unknown')
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85 if not isstdin:
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86 stat = os.lstat(f)
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87 if opts.size and not isdir:
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88 facts.append(b'size=%d' % stat.st_size)
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89 if opts.mode and not islink:
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90 facts.append(b'mode=%o' % (stat.st_mode & 0o777))
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91 if opts.links:
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92 facts.append(b'links=%d' % stat.st_nlink)
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93 if opts.newer:
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94 # mtime might be in whole seconds so newer file might be same
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95 if stat.st_mtime >= os.stat(opts.newer).st_mtime:
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96 facts.append(
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97 b'newer than %s' % opts.newer.encode('utf8', 'replace')
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98 )
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99 else:
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100 facts.append(
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101 b'older than %s' % opts.newer.encode('utf8', 'replace')
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102 )
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103 if opts.md5 and content is not None:
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104 h = hashlib.md5(content)
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105 facts.append(b'md5=%s' % binascii.hexlify(h.digest())[: opts.bytes])
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106 if opts.raw_sha1 and content is not None:
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107 h = hashlib.sha1(content)
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108 facts.append(b'raw-sha1=%s' % h.digest()[: opts.bytes])
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109 if opts.sha1 and content is not None:
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110 h = hashlib.sha1(content)
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111 facts.append(
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112 b'sha1=%s' % binascii.hexlify(h.digest())[: opts.bytes]
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113 )
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114 if opts.sha256 and content is not None:
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115 h = hashlib.sha256(content)
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116 facts.append(
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117 b'sha256=%s' % binascii.hexlify(h.digest())[: opts.bytes]
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118 )
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119 if isstdin:
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120 outfile.write(b', '.join(facts) + b'\n')
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121 elif facts:
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122 outfile.write(b'%s: %s\n' % (f.encode('utf-8'), b', '.join(facts)))
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123 elif not quiet:
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124 outfile.write(b'%s:\n' % f.encode('utf-8'))
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125 if content is not None:
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126 chunk = content
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127 if not islink:
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128 if opts.lines:
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129 if opts.lines >= 0:
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130 chunk = b''.join(chunk.splitlines(True)[: opts.lines])
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131 else:
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132 chunk = b''.join(chunk.splitlines(True)[opts.lines :])
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133 if opts.bytes:
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134 if opts.bytes >= 0:
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135 chunk = chunk[: opts.bytes]
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136 else:
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137 chunk = chunk[opts.bytes :]
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138 if opts.hexdump:
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139 for i in range(0, len(chunk), 16):
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140 s = chunk[i : i + 16]
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141 outfile.write(
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142 b'%04x: %-47s |%s|\n'
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143 % (
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144 i,
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145 b' '.join(b'%02x' % ord(c) for c in iterbytes(s)),
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146 re.sub(b'[^ -~]', b'.', s),
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147 )
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148 )
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149 if opts.dump:
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150 if not quiet:
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151 outfile.write(b'>>>\n')
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152 outfile.write(chunk)
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153 if not quiet:
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154 if chunk.endswith(b'\n'):
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155 outfile.write(b'<<<\n')
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156 else:
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157 outfile.write(b'\n<<< no trailing newline\n')
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158 if opts.recurse and dirfiles:
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159 assert not isstdin
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160 visit(opts, dirfiles, outfile)
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161
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162
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163 if __name__ == "__main__":
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164 parser = optparse.OptionParser("%prog [options] [filenames]")
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165 parser.add_option(
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166 "-t",
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167 "--type",
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168 action="store_true",
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169 help="show file type (file or directory)",
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170 )
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171 parser.add_option(
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172 "-m", "--mode", action="store_true", help="show file mode"
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173 )
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174 parser.add_option(
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175 "-l", "--links", action="store_true", help="show number of links"
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176 )
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177 parser.add_option(
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178 "-s", "--size", action="store_true", help="show size of file"
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179 )
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180 parser.add_option(
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181 "-n", "--newer", action="store", help="check if file is newer (or same)"
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182 )
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183 parser.add_option(
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184 "-r", "--recurse", action="store_true", help="recurse into directories"
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185 )
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186 parser.add_option(
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187 "-S",
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188 "--sha1",
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189 action="store_true",
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190 help="show sha1 hash of the content",
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191 )
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192 parser.add_option(
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193 "",
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194 "--raw-sha1",
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195 action="store_true",
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196 help="show raw bytes of the sha1 hash of the content",
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197 )
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198 parser.add_option(
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199 "",
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200 "--sha256",
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201 action="store_true",
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202 help="show sha256 hash of the content",
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203 )
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204 parser.add_option(
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205 "-M", "--md5", action="store_true", help="show md5 hash of the content"
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206 )
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207 parser.add_option(
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208 "-D", "--dump", action="store_true", help="dump file content"
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209 )
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210 parser.add_option(
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211 "-H", "--hexdump", action="store_true", help="hexdump file content"
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212 )
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213 parser.add_option(
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214 "-B", "--bytes", type="int", help="number of characters to dump"
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215 )
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216 parser.add_option(
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217 "-L", "--lines", type="int", help="number of lines to dump"
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218 )
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219 parser.add_option(
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220 "-q", "--quiet", action="store_true", help="no default output"
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221 )
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222 (opts, filenames) = parser.parse_args(sys.argv[1:])
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223 if not filenames:
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224 filenames = ['-']
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225
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226 visit(opts, filenames, getattr(sys.stdout, 'buffer', sys.stdout))