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POSimple? argv[] conversion to char*
 

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    <p>So I have a sample application source I am trying to modify for my own purposes</p> <p>it basically is running a shell script (test example below) but with privs using apple's security framework (see link below for original source).</p> <pre><code>#!/bin/bash echo $@ whoami </code></pre> <p>In that sample code we pass the following:</p> <pre><code> myFlags = kAuthorizationFlagDefaults; // 8 myStatus = AuthorizationExecuteWithPrivileges // 9 (myAuthorizationRef, myToolPath, myFlags, myArguments, &amp;myCommunicationsPipe); </code></pre> <p>I have modified the command to add myToolPath as the first argument as so:</p> <pre><code> // Grab the arguent length int size = strlen(argv[1]); // Grab the first argument char myToolPath[size]; strcpy(myToolPath,argv[1]); </code></pre> <p>which works, it means when I run</p> <pre><code>./compiled_priv_tool /tmp/example.sh </code></pre> <p>It returns "root" rather then the user I am using.</p> <p>But now I want to be able to pass arguments to this helper and have them added to this array This is what the example does in the sample code</p> <pre><code> char *myArguments[] = { "-u", NULL }; </code></pre> <p>So my previous shell example would have output like this:</p> <pre><code>./compiled_priv_tool /tmp/example.sh -u root </code></pre> <p>but I would like to be able to dynamically pass as many arguments as argv can contain to this script so the output would look like this</p> <pre><code>./compiled_priv_tool /tmp/example.sh -u user -f file path -b lah -u user -f file path -b lah root </code></pre> <p>I don't need to handle the arguments in the C code, I just need them to be passed directly to the shell script ( external command ).</p> <p>So heres my (hopefully) simple question, if one wanted to take argv[] and copy it except for argument 0 (which is the path to ./compiled_priv) to something expecting the char * myArguments var what would that look like in code. I learned objective C and never started with C so this is probably pretty basic but I have tried a for loop and copying the two indexes, but its not working. something like:</p> <p>char *myArguments[] = argv</p> <p>is what i want but that does not work, as it says invalid initializer, and even if it did it looks like we need a NULL at the end of the array much like a NSTask. I would include my for loop but its a non starter.</p> <p>So I need to the contents of argv from 1 to the end of the array and to add a NULL to the end and wrap that up in the same form as char *myArguments[] in the original sample code. If I understood c better it would help but in the mean time any thoughts? </p> <p>Here is a link to the source I am playing with if it helps,</p> <p><a href="http://developer.apple.com/library/mac/documentation/security/conceptual/authorization_concepts/03authtasks/authtasks.html#//apple_ref/doc/uid/TP30000995-CH206-TPXREF33" rel="nofollow">http://developer.apple.com/library/mac/documentation/security/conceptual/authorization_concepts/03authtasks/authtasks.html#//apple_ref/doc/uid/TP30000995-CH206-TPXREF33</a></p>
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    1. COCool so I'm going to go ahead and remove the security tag on this one.
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