[LTP] [PATCH v2 1/3] syscalls: new test writev07

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> From: "Cui Bixuan" <cuibixuan@huawei.com>
> To: ltp@lists.linux.it
> Sent: Thursday, 1 December, 2016 7:36:58 AM
> Subject: Re: [LTP] [PATCH v2 1/3] syscalls: new test writev07
> 
> On 2016/10/7 16:11, Jan Stancek wrote:
> > +				off_after);
> > +
> > +		SAFE_CLOSE(fd);
> > +		return;
> > +	}
> > +
> > +	/* writev() wrote more bytes than bytes preceding invalid iovec */
> > +	tst_res(TINFO, "writev() has written %ld bytes", TEST_RETURN);
> > +	if (TEST_RETURN > (long) wr_iovec[0].iov_base) {
> Hi, why TEST_RETURN(the return of writev) compare with
> wr_iovec[0].iov_base(the address) here?

Mistake on my part. That was obviously supposed to compare iovec length.
I pushed a fix to change that.

Thanks,
Jan

> 
> I run it in armv7 (with printf("TEST_RETURN:%ld, wr_iovec[0].iov_base:%ld\n",
> TEST_RETURN, (long) wr_iovec[0].iov_base) for debug):
> 
> # ./writev07
> tst_test.c:760: INFO: Timeout per run is 0h 05m 00s
> writev07.c:60: INFO: starting test with initial file offset: 0
> writev07.c:104: INFO: writev() has written 64 bytes
> writev07.c:106: FAIL: writev wrote more than expected
> TEST_RETURN:64, wr_iovec[0].iov_base:-1092708152
> writev07.c:60: INFO: starting test with initial file offset: 65
> writev07.c:104: INFO: writev() has written 64 bytes
> writev07.c:106: FAIL: writev wrote more than expected
> TEST_RETURN:64, wr_iovec[0].iov_base:-1092708152
> writev07.c:60: INFO: starting test with initial file offset: 4096
> writev07.c:104: INFO: writev() has written 64 bytes
> writev07.c:106: FAIL: writev wrote more than expected
> TEST_RETURN:64, wr_iovec[0].iov_base:-1092708152
> writev07.c:60: INFO: starting test with initial file offset: 4097
> writev07.c:104: INFO: writev() has written 64 bytes
> writev07.c:106: FAIL: writev wrote more than expected
> TEST_RETURN:64, wr_iovec[0].iov_base:-1092708144
> 
> So the case fail at all time.
> 
> Thanks,
> Cui Bixuan
> 
> > +		tst_res(TFAIL, "writev wrote more than expected");
> > +		SAFE_CLOSE(fd);
> > +		return;
> > +	}
> > +
> > +	/* file content matches written bytes */
> > +	SAFE_LSEEK(fd, initial_file_offset, SEEK_SET);
> > +	SAFE_READ(1, fd, tmp, TEST_RETURN);
> 
> 
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