Date: Tue, 03 Jun 2003 11:04:20 -0600 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: Kern Sibbald <kern@sibbald.com> Cc: mjacob@feral.com Subject: Re: SCSI tape data loss Message-ID: <900070000.1054659860@aslan.btc.adaptec.com> In-Reply-To: <1054658432.13630.252.camel@rufus> References: <3EDB31AB.16420.C8964B7D@localhost> <3EDB59A4.27599.C93270FB@localhost> <20030602110836.H71034@beppo> <577540000.1054579840@aslan.btc.adaptec.com> <20030602131225.F71034@beppo> <1054645616.13630.161.camel@rufus> <20030603072944.U44880@beppo> <1054652678.13630.209.camel@rufus> <882210000.1054657530@aslan.btc.adaptec.com> <1054658432.13630.252.camel@rufus>
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> Yes, I probably should move the clrerror() and the
> check/set of errno inside the check for "stat == -1".
> However, the code though odd is correct since
> I do not use errno unless the status is -1.
No, the code is not correct. clrerror() has side effects
in many cases when errno is non-zero.
> By the way, the funny casting is mandatory in C++,
> because ssize_t as returned by the write is not the
> same as size_t (what is written).
Integer type conversions are still valid in C++:
#include <stdio.h>
#include <inttypes.h>
int
subroutine(uint8_t small_type)
{
printf("small_type is %d\n", small_type);
return (0);
}
int
main(int argc, char *argv[])
{
uint8_t foo;
uint32_t bigger_foo;
foo = 100;
bigger_foo = argc;
if (foo != bigger_foo) {
printf("Foos differ\n");
}
subroutine(bigger_foo);
return (0);
}
% g++ -Wall -pedantic foo.cc
Produces no output.
--
Justin
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