On 16.11.22 04:31, Ted Yu wrote:
On Wed, 16 Nov 2022 at 11:15, Ted Yu <yuzhih...@gmail.com
<mailto:yuzhih...@gmail.com>> wrote:
> On Tue, Nov 15, 2022 at 7:12 PM Japin Li <japi...@hotmail.com
<mailto:japi...@hotmail.com>> wrote:
>> After some rethinking, I find the origin code do not have problems.
>>
>> If fd is NULL or fgets() returns NULL, the process exits.
Otherwise, we
>> call
>> pclose() to close fd. The code isn't straightforward, however,
it is
>> correct.
Hi,
Please take a look at the following:
https://en.cppreference.com/w/c/io/fgets
<https://en.cppreference.com/w/c/io/fgets>
Quote: If the failure has been caused by some other error, sets the
/error/ indicator (see ferror()
<https://en.cppreference.com/w/c/io/ferror>) on |stream|. The contents
of the array pointed to by |str| are indeterminate (it may not even be
null-terminated).
That has nothing to do with the return value of fgets().
