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git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@204 a672b425-5310-4d7a-af5c-997e18724b81
53 lines
2.0 KiB
HTML
53 lines
2.0 KiB
HTML
---
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layout: page
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category_title: Intermediate commands
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category-page: intermediate
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tags: strings read binaries file
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author: Marco Farace
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title: Strings
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---
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<h2>Use: The strings command returns each string of printable characters (ASCII)
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in files. Its main uses are to determine the contents of and to extract text
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from binary files (i.e., non-text files). </h2>
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<p>From the Shell manual: "find the printable strings in a object, or other binary,
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file".<br>
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Strings can be used to extract character information and string of a given lenght
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from text file(s). When used without any options, strings displays all strings
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that are at least four characters in length in the files whose names are
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supplied as arguments (i.e., input data). Strings that are on separate lines
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in the input files are shown on separate lines on the screen, and an attempt
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is made to display all strings found on a single line in a file on a single
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line on the screen (although there may be a carryover to subsequent lines in
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the event that numerous strings are found on a single line). strings looks in
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all sections of the object files except the (__TEXT,__text) section.</p>
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<p>Basic syntax for this command is as follows:</p>
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<pre>strings [options] file_name(s)</pre>
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<pre>strings -n 2 file1 file2</pre>
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<p>For example, the code above would display all strings in the files named
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file1 and file2 that consist of at least two characters.</p>
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<h3> Flags <h3>
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<ul>
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<li><b>-n</b><br><br>
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Specify the minimum string length, where the number argument is
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a positive decimal integer. The default shall be 4.</li>
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<li><b>-</b><br><br>
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This option causes strings to look for strings in all bytes of
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the files (the default for non-object files).</li>
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<li><b>--</b><br><br>
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This option causes strings to treat all the following arguments
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as files.</li>
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<li><b>-a</b><br><br>
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This option causes strings to look for strings in all sections
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of the object file (including the (__TEXT,__text) section.</li>
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</ul>
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