From ee188d555b8c32ad9704a7440cab400af967292f Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Wed, 5 Jun 1996 01:07:21 +0000 Subject: Tue Jun 4 21:01:20 1996 Roland McGrath * sysdeps/mach/hurd/getlogin_r.c: New file. Wed Jun 5 02:11:30 1996 Ulrich Drepper * io/Makefile (routines): Add ttyname_r. * resolv/res_debug.c, resolv/resolv.h: Update from bind-4.3.4-T4A. * sysdeps/libm-i387/e_asinl.S, sysdeps/libm-i387/e_atan2l.S, sysdeps/libm-i387/e_expl.S, sysdeps/libm-i387/e_fmodl.S, sysdeps/libm-i387/e_log10l.S, sysdeps/libm-i387/e_logl.S, sysdeps/libm-i387/e_remainderl.S, sysdeps/libm-i387/e_scalbl.S, sysdeps/libm-i387/e_sqrtl.S, sysdeps/libm-i387/s_atanl.S, sysdeps/libm-i387/s_cosl.S, sysdeps/libm-i387/s_ilogbl.S, sysdeps/libm-i387/s_log1pl.S, sysdeps/libm-i387/s_logbl.S, sysdeps/libm-i387/s_scalbnl.S, sysdeps/libm-i387/s_sinl.S, sysdeps/libm-i387/s_tanl.S: New files. i387 assembler versions of `long double' math functions. * sysdeps/libm-ieee754/k_standard.c: Add handling for errors in long double functions. * sysdeps/libm-ieee754/s_ilogbl.c, sysdeps/libm-ieee754/s_logbl.c, sysdeps/libm-ieee754/s_modfl.c: New files. Generic versions of `long double' math functions. * sysdeps/libm-ieee754/s_isinf.c [NO_LONG_DOUBLE]: Add string alias for __isinfl. * sysdeps/libm-ieee754/w_acoshl.c, sysdeps/libm-ieee754/w_acosl.c, sysdeps/libm-ieee754/w_asinl.c, sysdeps/libm-ieee754/w_atan2l.c, sysdeps/libm-ieee754/w_atanhl.c, sysdeps/libm-ieee754/w_cabsl.c, sysdeps/libm-ieee754/w_coshl.c, sysdeps/libm-ieee754/w_dreml.c, sysdeps/libm-ieee754/w_expl.c, sysdeps/libm-ieee754/w_fmodl.c, sysdeps/libm-ieee754/w_gammal.c, sysdeps/libm-ieee754/w_gammal_r.c, sysdeps/libm-ieee754/w_hypotl.c, sysdeps/libm-ieee754/w_j0l.c, sysdeps/libm-ieee754/w_j1l.c, sysdeps/libm-ieee754/w_jnl.c, sysdeps/libm-ieee754/w_lgammal.c, sysdeps/libm-ieee754/w_lgammal_r.c, sysdeps/libm-ieee754/w_log10l.c, sysdeps/libm-ieee754/w_logl.c, sysdeps/libm-ieee754/w_powl.c, sysdeps/libm-ieee754/w_remainderl.c, sysdeps/libm-ieee754/w_scalbl.c, sysdeps/libm-ieee754/w_sinhl.c, sysdeps/libm-ieee754/w_sqrtl.c: New files. Wrapper functions around long double function implementations. * sysdeps/posix/ttyname_r.c (ttyname_r): Use _D_EXACT_NAMLEN to determine length of directory entry name. * posix/Makefile (routines): Add getlogin_r. * posix/unistd.h: Add prototype for getlogin_r. * sysdeps/stub/getlogin_r.c: New file. Reentrant version of getlogin function, specified in P1003.1c/D6. Stub version. * sysdeps/unix/getlogin.c (getlogin): Use ttyname_r instead of ttyname. This avoids saving and restoring the old content. Also use setutent_r, getutline_r and endutent_r instead of accing UTMP file directly. * sysdeps/unix/getlogin_r.c: New file. Reentrant version of getlogin function, specified in P1003.1c/D6. Tue Jun 4 20:10:09 1996 J.T. Conklin * sysdeps/libm-i387/s_finitef.S: Fix mask for exponent. * elf/dl-lookup.c (_dl_lookup_symbol): Grok magical undefined symbols _GNU_libc_dl_{open,close,symbol} and resolve them to dl functions. * elf/rtld.c (rtld_map): Renamed to _dl_rtld_map, made global. * elf/link.h: Declare _dl_rtld_map. * elf/dl-lookup.c (_dl_symbol_value): New function. * elf/link.h: Declare it. stdio-common/vfscanf.c: Prepare for reentrant libio. Used in reentrant libio. --- sysdeps/unix/getlogin_r.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 sysdeps/unix/getlogin_r.c (limited to 'sysdeps/unix/getlogin_r.c') diff --git a/sysdeps/unix/getlogin_r.c b/sysdeps/unix/getlogin_r.c new file mode 100644 index 0000000..15afdee --- /dev/null +++ b/sysdeps/unix/getlogin_r.c @@ -0,0 +1,80 @@ +/* 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 +#include +#include +#include +#include +#include + +#include + +/* 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; + + { + 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); + if (getutline_r (real_tty_path, &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; +} -- cgit v1.1