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How to assign needed file descriptor to a file (edit)
Revision as of 09:35, 5 August 2014
, 09:35, 5 August 2014no edit summary
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+
+
</pre>
</pre>
−what's next?
+what's next? In Linux there's a cool system call dup2() which assigns to a file referenced by one file descriptor some other one, given by the caller.
+So the code would look like this:
+<pre>
+ int fd;
+ fd = open_a_file(fd->file);
+ dup2(fd, fd->tgt_fd);
+ close(fd);
+</pre>
+[[Category:Under the hood]]