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Re: obscure bug "extern void free (void *__ptr) __attribute__ ((__nothro

From: Oğuz
Subject: Re: obscure bug "extern void free (void *__ptr) __attribute__ ((__nothrow__ , __leaf__));"
Date: Fri, 22 Jan 2021 14:00:58 +0200

22 Ocak 2021 Cuma tarihinde Eduardo A. Bustamante López <dualbus@gmail.com>
> - Notice that the value returned by `fstat(0, ...)' indicates that
> /dev/null in your system is a *regular* file (it should be
> `st_mode=S_IFCHR|0666', but instead it is `st_mode=S_IFCHR|0666'). It also
> indicates that its size is 73 bytes (`st_size=73').
> - Notice that `cat' reads from file descriptor 0 (i.e. /dev/null), and the
> return value is a string of 73 bytes in length.
> - `cat' then writes that string out to `./config.status'
> 73 happens to be the length of the string that has been causing issues for
> you:
>   $ echo "extern void free (void *__ptr) __attribute__ ((__nothrow__ ,
> __leaf__));" | wc -c
>   73

Hilarious. I bet at some point, someone thought moving a file to /dev/null
would have the same effect as removing it...


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