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    <p>Why not use the <strong><a href="http://www.manpagez.com/man/3/remove/" rel="nofollow noreferrer">remove</a></strong> or <strong><a href="http://www.manpagez.com/man/2/unlink/" rel="nofollow noreferrer">unlink</a></strong> command instead of <code>system("rm ...")</code>?</p> <p><code>remove(argv[2]);</code> or <code>unlink(argv[2]);</code></p> <hr> <p><strong>Update</strong> in the case that <code>system("rm ...")</code> must be used</p> <p>If you must use <code>system("rm ...")</code>, <a href="https://stackoverflow.com/questions/2250140/using-the-rm-command-in-a-c-program-using-the-system-function-in-stdlib-h/2250150#2250150">ZelluX</a> is correct in stating that you must retrieve the filename from <code>argv[2]</code>. You can retrieve the string in <code>argv[2]</code> using <strong><a href="http://www.manpagez.com/man/3/snprintf/" rel="nofollow noreferrer">snprintf</a></strong> or <strong><a href="http://www.manpagez.com/man/3/strncpy/" rel="nofollow noreferrer">strncpy</a></strong>. Using the variants of the functions that restrict the input size is a <a href="http://www.ibm.com/developerworks/library/s-buffer-defend.html" rel="nofollow noreferrer">good idea</a> as there is no guarantee as to the length of the string in <code>argv[2]</code>.</p> <p>Depending on your application, you may also want to call <strong><a href="http://www.manpagez.com/man/2/stat/" rel="nofollow noreferrer">stat</a></strong> to verify that the string in <code>argv[2]</code> is indeed a file and possibly restrict the type of file.</p> <p><strong>Example:</strong> </p> <p>This example calls <strong><a href="http://www.manpagez.com/man/2/stat/" rel="nofollow noreferrer">stat</a></strong> to verify that <code>argv[2]</code> is a regular file and <strong><a href="http://www.manpagez.com/man/3/asprintf/" rel="nofollow noreferrer">asprintf</a></strong> to dynamically allocate space for the buffer.</p> <pre><code>char *p; struct stat st; if (stat(argv[2], &amp;st) == 0 &amp;&amp; S_ISREG(st-&gt;st_mode)) { if (asprintf(&amp;p, "rm %s", argv[2]) != -1) { system(p); free(p); } } </code></pre>
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    1. POusing the 'rm' command in a c program using the system() function in stdlib.h
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    1. POusing the 'rm' command in a c program using the system() function in stdlib.h
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    1. COI can only assume this got four upvotes before the horrendously bad advice "You will still need to retrieve the string in argv[2] using snprintf or strncpy" was added. What point is there in copying the string to a new string if you're not going to modify it, other than to increase the chance of buffer overflows?
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    2. COnot sure how there would be a buffer overflow using snprintf or strncpy, but you are correct that this step is not necessary. answer rolled back.
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    3. COThe question didn't say so, but you could pass parameters to rm using just argv[2], in which case unlink won't work :-)
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