topic Re: Function Open bug C in Operating System - HP-UX

Function Open bug C

MR GROSS — Mon, 29 Oct 2001 08:06:14 GMT

Hello,

I don't understand why the function open in languge C on Hp 10.20 serie 700 don't function.
void main()
{
int fd;

fd = open("file", O_RDONLY);
close(fd);
}
And whith goods includes.
Thanks

Re: Function Open bug C

Deepak Extross — Mon, 29 Oct 2001 09:35:22 GMT

What error does it report?

Add the following after your call to open()
----
if (fd < 0)
printf ("open failed with errno %d\n", errno);
----
and do a finderr on the error number.

remeber to #include .

Re: Function Open bug C

MR GROSS — Mon, 29 Oct 2001 11:13:24 GMT

when I compile this function, this error appear:
cc: "File", line 7 / error 1588 : "O_RDONLY" undenied

yet this function function with other OS like IBM and I include good

Re: Function Open bug C

A. Clay Stephenson — Mon, 29 Oct 2001 13:12:43 GMT

Hi Gross:

I hope this doesn't compile. You obviously don't have included with your good includes.

Re: Function Open bug C

Carlos Fernandez Riera — Mon, 29 Oct 2001 13:23:36 GMT

#

Compile now.

Re: Function Open bug C

MR GROSS — Tue, 30 Oct 2001 07:34:46 GMT

But I use this include

Re: Function Open bug C

Deepak Extross — Tue, 30 Oct 2001 09:19:50 GMT

This is strange.
What does "grep O_RDONLY /usr/include/sys/fcntl.h" yield?

Re: Function Open bug C

MR GROSS — Tue, 30 Oct 2001 09:33:34 GMT

I just try, and the sentence appear:
define O_RDONLY 000000 /*open for reading only*/
But if I replace O_RDWR the function open don't function. I think it's a bug and I want a patche please.
thanks everybody.

Re: Function Open bug C

Carlos Fernandez Riera — Tue, 30 Oct 2001 09:59:00 GMT

It seem to be a missconfiguration or bad permision on /usr/include, or something so.

/usr/include/fcntl must
#include where 0_xxx are defined.

Try swverify for ansiC package.

Re: Function Open bug C

Deepak Extross — Tue, 30 Oct 2001 10:10:05 GMT

In that case, just replace 'O_RDONLY' with '0000000'.
Remove the #include and compile.

Quick & dirty, but it'll work for the small test program that you have. (I hope my boss doesnt see this!)

Re: Function Open bug C

MR GROSS — Tue, 30 Oct 2001 12:12:29 GMT

I despair. I realise that nobody can help me.
thank everybody.

if you find the solution, please mail to:
eric.bocquel@sextant.thomson-csf.com

Re: Function Open bug C

Carlos Fernandez Riera — Tue, 30 Oct 2001 23:08:26 GMT

Is this your problem???

#include
#include

main()
{
int pp;

pp=open("/tmp/pp.c",0_RDONLY);
close (pp);
}
UES90201:/tmp#cc pp.c -o pp
cc: "pp.c", line 8: error 1000: Unexpected symbol: "_RDONLY".

Now:

#include
#include

main()
{
int pp;

pp=open("/tmp/pp.c",O_RDONLY);
close (pp);
}
UES90201:/tmp#cc pp.c -o pp
/usr/ccs/bin/ld: (Warning) At least one PA 2.0 object file (pp.o) was detected. The linked output may not run on a PA 1.x system.

DIFFERENCE:

0_RDONLY (zero_RDONLY) and O_RDONLY

Regards.

Re: Function Open bug C

Deepak Extross — Wed, 31 Oct 2001 08:32:53 GMT

Full marks to Carlos for creativity! :)

Gross,
This maybe flogging a dead horse, but is it possible that you dont have or cant access /usr/include/fcntl.h?

Try
#include
instead of
#include