mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 18:40:14 +00:00
a3e59be8d1
Mon Aug 12 03:31:58 1996 Ulrich Drepper <drepper@cygnus.com> * nss/nsswitch.c (__nss_configure_lookup): New function. Allows to specify services. * nss/XXX-lookup.h: Rename database variable and make global. * nss/databases.def: New file. Real names of all databases. * nss/nss.h: New file. Contains declaration useful for users and service developers. * nss/nsswitch.h: Move some declarations to nss/nss.h. * nss.h: New file. Wrapper around nss/nss.h. * nss/Makefile (headers): Add nss.h. (distributes): Add databases.h. Sun Aug 11 16:19:42 1996 Ulrich Drepper <drepper@cygnus.com> Help the poor people with fast machines by making sure only one `ar' commands works on the library. * autolock.sh: New file. Written by Tom Tromey. * Makerules (do-ar): Call autolock.sh shell script instead of directly using `ar'. * config.make.in: Make configuration variable AUTOLOCK which gets initialized by configure. * configure.in: Define variable AUTOLOCK to point to autolock.sh script and mark it to substitute. * string/Makefile: Add -fno-builtin for tst-strlen.c, too. * elf/dl-lookup.c (_dl_lookup_symbol): Allow self-referencing. Patch by David Mosberger-Tang. Sun Aug 11 01:12:38 1996 Richard Henderson <rth@tamu.edu> * sysdeps/alpha/dl-machine.h (elf_alpha_fix_plt): Optimize LD_BIND_NOW startup by moving Icache flush from here ... (ELF_MACHINE_RUNTIME_TRAMPOLINE): ... to here. (ELF_MACHINE_USER_ADDRESS_MASK): Delete; it is unused. * sysdeps/alpha/divrem.h: Update comment to reflect the actual calling conventions. The code is already correct. Sun Aug 11 01:06:42 1996 Richard Henderson <rth@tamu.edu> * string/Makefile: Compile tester with -fno-builtin as we want to test our implementations, not gcc's.
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/* 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 the login name of the user, or NULL if it can't be determined.
|
|
The returned pointer, if not NULL, is good only until the next call. */
|
|
|
|
char *
|
|
getlogin (void)
|
|
{
|
|
char tty_pathname[2 + 2 * NAME_MAX];
|
|
char *real_tty_path = tty_pathname;
|
|
char *result = NULL;
|
|
struct utmp_data utmp_data = { ut_fd: -1 };
|
|
static char name[UT_NAMESIZE + 1];
|
|
struct utmp *ut, line;
|
|
|
|
/* Get name of tty connected to fd 0. Return NULL if not a tty or
|
|
if fd 0 isn't open. Note that a lot of documentation says that
|
|
getlogin() is based on the controlling terminal---what they
|
|
really mean is "the terminal connected to standard input". The
|
|
getlogin() implementation of DEC Unix, SunOS, Solaris, HP-UX all
|
|
return NULL if fd 0 has been closed, so this is the compatible
|
|
thing to do. Note that ttyname(open("/dev/tty")) on those
|
|
systems returns /dev/tty, so that is not a possible solution for
|
|
getlogin(). */
|
|
if (__ttyname_r (0, real_tty_path, sizeof (tty_pathname)) < 0)
|
|
return NULL;
|
|
|
|
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. */
|
|
errno = ENOENT;
|
|
result = NULL;
|
|
}
|
|
else
|
|
{
|
|
strncpy (name, ut->ut_user, UT_NAMESIZE);
|
|
name[UT_NAMESIZE] = '\0';
|
|
result = name;
|
|
}
|
|
|
|
__endutent_r (&utmp_data);
|
|
|
|
return result;
|
|
}
|