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1 #!/usr/bin/env python |
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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 import sys, os, errno, re, glob, optparse |
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27 |
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28 def visit(opts, filenames, outfile): |
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29 """Process filenames in the way specified in opts, writing output to |
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30 outfile.""" |
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31 for f in sorted(filenames): |
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32 isstdin = f == '-' |
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33 if not isstdin and not os.path.lexists(f): |
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34 outfile.write('%s: file not found\n' % f) |
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35 continue |
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36 quiet = opts.quiet and not opts.recurse or isstdin |
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37 isdir = os.path.isdir(f) |
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38 islink = os.path.islink(f) |
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39 isfile = os.path.isfile(f) and not islink |
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40 dirfiles = None |
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41 content = None |
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42 facts = [] |
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43 if isfile: |
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44 if opts.type: |
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45 facts.append('file') |
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46 if opts.hexdump or opts.dump or opts.md5: |
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47 content = file(f).read() |
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48 elif islink: |
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49 if opts.type: |
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50 facts.append('link') |
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51 content = os.readlink(f) |
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52 elif isstdin: |
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53 content = sys.stdin.read() |
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54 if opts.size: |
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55 facts.append('size=%s' % len(content)) |
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56 elif isdir: |
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57 if opts.recurse or opts.type: |
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58 dirfiles = glob.glob(f + '/*') |
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59 facts.append('directory with %s files' % len(dirfiles)) |
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60 elif opts.type: |
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61 facts.append('type unknown') |
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62 if not isstdin: |
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63 stat = os.lstat(f) |
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64 if opts.size: |
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65 facts.append('size=%s' % stat.st_size) |
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66 if opts.mode: |
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67 facts.append('mode=%o' % (stat.st_mode & 0777)) |
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68 if opts.links: |
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69 facts.append('links=%s' % stat.st_nlink) |
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70 if opts.newer: |
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71 # mtime might be in whole seconds so newer file might be same |
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72 if stat.st_mtime >= os.stat(opts.newer).st_mtime: |
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73 facts.append('newer than %s' % opts.newer) |
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74 else: |
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75 facts.append('older than %s' % opts.newer) |
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76 if opts.md5 and content is not None: |
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77 try: |
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78 from hashlib import md5 |
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79 except ImportError: |
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80 from md5 import md5 |
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81 facts.append('md5=%s' % md5(content).hexdigest()[:opts.bytes]) |
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82 if opts.sha1 and content is not None: |
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83 try: |
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84 from hashlib import sha1 |
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85 except ImportError: |
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86 from sha import sha as sha1 |
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87 facts.append('sha1=%s' % sha1(content).hexdigest()[:opts.bytes]) |
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88 if isstdin: |
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89 outfile.write(', '.join(facts) + '\n') |
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90 elif facts: |
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91 outfile.write('%s: %s\n' % (f, ', '.join(facts))) |
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92 elif not quiet: |
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93 outfile.write('%s:\n' % f) |
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94 if content is not None: |
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95 chunk = content |
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96 if not islink: |
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97 if opts.lines: |
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98 if opts.lines >= 0: |
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99 chunk = ''.join(chunk.splitlines(True)[:opts.lines]) |
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100 else: |
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101 chunk = ''.join(chunk.splitlines(True)[opts.lines:]) |
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102 if opts.bytes: |
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103 if opts.bytes >= 0: |
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104 chunk = chunk[:opts.bytes] |
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105 else: |
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106 chunk = chunk[opts.bytes:] |
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107 if opts.hexdump: |
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108 for i in range(0, len(chunk), 16): |
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109 s = chunk[i:i+16] |
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110 outfile.write('%04x: %-47s |%s|\n' % |
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111 (i, ' '.join('%02x' % ord(c) for c in s), |
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112 re.sub('[^ -~]', '.', s))) |
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113 if opts.dump: |
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114 if not quiet: |
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115 outfile.write('>>>\n') |
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116 outfile.write(chunk) |
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117 if not quiet: |
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118 if chunk.endswith('\n'): |
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119 outfile.write('<<<\n') |
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120 else: |
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121 outfile.write('\n<<< no trailing newline\n') |
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122 if opts.recurse and dirfiles: |
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123 assert not isstdin |
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124 visit(opts, dirfiles, outfile) |
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125 |
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126 if __name__ == "__main__": |
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127 parser = optparse.OptionParser("%prog [options] [filenames]") |
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128 parser.add_option("-t", "--type", action="store_true", |
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129 help="show file type (file or directory)") |
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130 parser.add_option("-m", "--mode", action="store_true", |
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131 help="show file mode") |
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132 parser.add_option("-l", "--links", action="store_true", |
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133 help="show number of links") |
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134 parser.add_option("-s", "--size", action="store_true", |
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135 help="show size of file") |
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136 parser.add_option("-n", "--newer", action="store", |
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137 help="check if file is newer (or same)") |
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138 parser.add_option("-r", "--recurse", action="store_true", |
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139 help="recurse into directories") |
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140 parser.add_option("-S", "--sha1", action="store_true", |
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141 help="show sha1 hash of the content") |
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142 parser.add_option("-M", "--md5", action="store_true", |
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143 help="show md5 hash of the content") |
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144 parser.add_option("-D", "--dump", action="store_true", |
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145 help="dump file content") |
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146 parser.add_option("-H", "--hexdump", action="store_true", |
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147 help="hexdump file content") |
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148 parser.add_option("-B", "--bytes", type="int", |
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149 help="number of characters to dump") |
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150 parser.add_option("-L", "--lines", type="int", |
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151 help="number of lines to dump") |
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152 parser.add_option("-q", "--quiet", action="store_true", |
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153 help="no default output") |
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154 (opts, filenames) = parser.parse_args(sys.argv[1:]) |
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155 if not filenames: |
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156 filenames = ['-'] |
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157 |
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158 visit(opts, filenames, sys.stdout) |