Date: Fri, 4 Jul 2014 16:00:17 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Dmitry Sivachenko <trtrmitya@gmail.com> Cc: freebsd-standards@freebsd.org Subject: Re: About sysconf(_SC_GETPW_R_SIZE_MAX) Message-ID: <20140704130017.GG93733@kib.kiev.ua> In-Reply-To: <DDC4C361-1C27-4913-91BB-1974AD1163A7@gmail.com> References: <DDC4C361-1C27-4913-91BB-1974AD1163A7@gmail.com>
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On Fri, Jul 04, 2014 at 11:05:46AM +0400, Dmitry Sivachenko wrote:
> Hello!
>=20
> (FreeBSD-10/stable).
>=20
> According to sysconf(3), _SC_GETPW_R_SIZE_MAX is the valid argument to sy=
sconf():
>=20
> _SC_GETPW_R_SIZE_MAX
> Suggested initial value for the size of the password entry
> buffer.
>=20
> But the following test program fails:
>=20
> #include <unistd.h>
> #include <err.h>
> #include <errno.h>
> #include <stdio.h>
>=20
> int main() {
> int buf_sz;
>=20
> errno=3D0;
> buf_sz =3D sysconf(_SC_GETPW_R_SIZE_MAX);
> printf("%d\n", buf_sz);
> warn("sysconf: ");
> return 0;
> }
>=20
> % ./a.out=20
> -1
> a.out: sysconf: : Invalid argument
>=20
>=20
> What is wrong?
=46rom lib/libc/gen/sysconf.c, around line 327:
#if _POSIX_THREAD_SAFE_FUNCTIONS > -1
case _SC_GETGR_R_SIZE_MAX:
case _SC_GETPW_R_SIZE_MAX:
#error "somebody needs to implement this"
#endif
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