Re: www/elinks does not work in raspberry pi Zero W

[Ramiro Aceves <ea1abz%gmail.com@localhost>]

El 18/2/24 a las 23:27, Michael van Elst escribió:
> ea1abz%gmail.com@localhost (Ramiro Aceves) writes:
>
> > Elinks package does not work properly in my Raspberry Pi Zero W board.
> > ERROR at select.c:585: The call to select() failed: 22 (Invalid argument)
>
> That's a bug in elinks. It uses an internal data structure defined as
>
> typedef struct { long sec; long usec; } timeval_T;
>
> and passes that to select() as a 'struct timeval'.
>
> A 'struct timeval' is:
>
> struct timeval {
>          time_t          tv_sec;         /* seconds */
>          suseconds_t     tv_usec;        /* and microseconds */
> };
>
> That's 64bit for seconds and 32bit for microseconds on amd64 and arm.
>
> The internal timeval_T type however is:
>
> 64bit seconds, 64bit microseconds on amd64.
>
> -> seconds im ok, microseconds also reads the same because amd64
>     uses little endian and the extra 32bit, which are zero for
>     legal microsecond values, get ignored.
>
> but on arm that's 32bit seconds and 32bit microseconds.
>
> -> the system wi

ll interpret all 64 bits as the seconds value
>     and read the following (undefined) 32 bits as microseconds.
>     Fortunately the undefined bits happen to look invalid (negative
>     or larger than 999999). Thus the "Invalid argument" error.
>     Otherwise the "following bits" would be modified, which may
>     lead to a crash or worse.
>
> The github version of elinks (0.17, pkgsrc has 0.16) fixes that
> particular problem.

Hello Michael,
Thanks so much for your great explanation that makes sense. I have to 
try in my 386 machine, it should also fail.
I do not know what the solution will be in cases like this. Try to 
compile 0.17 version from github directly? try to tweak the pkgsrc 
elinks for 0.17? I am not in a hurry and can use links that works. just 
as an exercise to learn something.

Many thanks.
Ramiro