glibc/sysdeps/unix/getlogin_r.c
Roland McGrath 58e071515a * math/Makefile (libm-support, libm-calls): New variables.
(libm-routines): Construct this from those.
	(calls): New variable.
	(routines): Construct this from it.

	* resolv/res_debug.c: Add missing #include <ctype.h>.

	* sysdeps/unix/getlogin.c: Must pass struct utmp ptr to getutline_r.
	* sysdeps/unix/getlogin_r.c: Likewise.

	* sysdeps/libm-ieee754/w_hypotl.c: Fix typo.

	* sysdeps/libm-ieee754/w_cabsl.c: __cabsl_complex -> __cabs_complexl

	* math/Makefile (long-m-routines): Define recursive variable as
	$(long-m-$(long-double-fcts)).
	(long-m-yes): Put list of routines here.
	(long-c-routines, long-c-yes): Likewise.

	* sysdeps/unix/sysv/linux/schedbits.h: File removed.

	* sysdeps/i386/Makefile (long-double-fcts): New variable, set to yes.
	* sysdeps/m68k/Makefile: Likewise.

	* math/Makefile [$(long-double-fcts)!=yes] (CPPFLAGS): Append
 	-DNO_LONG_DOUBLE.
1996-06-05 03:29:45 +00:00

82 lines
2.1 KiB
C

/* Reentrant function to return the current login name. Unix version.
Copyright (C) 1991, 1992, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <limits.h>
#include <fcntl.h>
#include <utmp.h>
/* Return at most NAME_LEN characters of the login name of the user in NAME.
If it cannot be determined or some other error occured, return the error
code. Otherwise return 0. */
int
getlogin_r (name, name_len)
char *name;
size_t name_len;
{
char tty_pathname[2 + 2 * NAME_MAX];
char *real_tty_path = tty_pathname;
int result = 0;
struct utmp_data utmp_data;
struct utmp *ut, line;
{
int err;
int d = __open ("/dev/tty", 0);
if (d < 0)
return errno;
result = ttyname_r (d, real_tty_path, sizeof (tty_pathname));
err = errno;
(void) close (d);
if (result < 0)
{
errno = err;
return err;
}
}
real_tty_path += 5; /* Remove "/dev/". */
setutent_r (&utmp_data);
strncpy (line.ut_line, real_tty_path, sizeof line.ut_line);
if (getutline_r (&line, &ut, &utmp_data) < 0)
{
if (errno == ESRCH)
/* The caller expects ENOENT if nothing is found. */
result = ENOENT;
else
result = errno;
}
else
{
strncpy (name, ut->ut_line, name_len);
result = 0;
}
endutent_r (&utmp_data);
return result;
}