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authorRoland McGrath <roland@gnu.org>1996-06-05 01:07:21 +0000
committerRoland McGrath <roland@gnu.org>1996-06-05 01:07:21 +0000
commitee188d555b8c32ad9704a7440cab400af967292f (patch)
tree037a4821d35c11f2bbf89e7e71dc43dada67b166 /sysdeps/unix/getlogin.c
parentf68b86cc7bdcee246296d49f3a3318c1b97693f0 (diff)
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Tue Jun 4 21:01:20 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* sysdeps/mach/hurd/getlogin_r.c: New file. Wed Jun 5 02:11:30 1996 Ulrich Drepper <drepper@cygnus.com> * 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 <jtc@cygnus.com> * 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.
Diffstat (limited to 'sysdeps/unix/getlogin.c')
-rw-r--r--sysdeps/unix/getlogin.c54
1 files changed, 19 insertions, 35 deletions
diff --git a/sysdeps/unix/getlogin.c b/sysdeps/unix/getlogin.c
index 504a7aa..00baf68 100644
--- a/sysdeps/unix/getlogin.c
+++ b/sysdeps/unix/getlogin.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+/* 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
@@ -17,7 +17,6 @@ not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
-#include <stddef.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
@@ -27,38 +26,29 @@ Cambridge, MA 02139, USA. */
#include <utmp.h>
-/* Defined in ttyname.c. */
-extern char *__ttyname;
-
/* 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 *
DEFUN_VOID(getlogin)
{
- char save_tty_pathname[2 + 2 * NAME_MAX];
- char *save_ttyname;
- char *real_tty_path;
+ char tty_pathname[2 + 2 * NAME_MAX];
+ char *real_tty_path = tty_pathname;
char *result = NULL;
- FILE *f;
- static struct utmp ut;
-
- if (__ttyname == NULL)
- save_ttyname = NULL;
- else
- save_ttyname = strcpy (save_tty_pathname, __ttyname);
+ static struct utmp_data utmp_data;
+ struct utmp *ut;
{
- int err;
+ int err = 0;
int d = __open ("/dev/tty", 0);
if (d < 0)
return NULL;
- real_tty_path = ttyname (d);
- err = errno;
+ if (ttyname_r (d, real_tty_path, sizeof (tty_pathname)) < 0)
+ err = errno;
(void) close (d);
- if (real_tty_path == NULL)
+ if (errno != 0)
{
errno = err;
return NULL;
@@ -67,24 +57,18 @@ DEFUN_VOID(getlogin)
real_tty_path += 5; /* Remove "/dev/". */
- f = fopen ("/etc/utmp", "r");
- if (f != NULL)
+ setutent_r (&utmp_data);
+ if (getutline_r (real_tty_path, &ut, &utmp_data) < 0)
{
- while (fread ((PTR) &ut, sizeof(ut), 1, f) == 1)
- if (!strncmp (ut.ut_line, real_tty_path, sizeof (ut.ut_line)))
- {
- result = ut.ut_name;
- /* The name is not null-terminated if
- it is as long as sizeof (ut.ut_name). */
- result[sizeof (ut.ut_name)] = '\0';
- break;
- }
- (void) fclose (f);
+ if (errno == ESRCH)
+ /* The caller expects ENOENT if nothing is found. */
+ errno = ENOENT;
+ result = NULL;
}
+ else
+ result = ut->ut_line;
+
+ endutent_r (&utmp_data);
- if (save_ttyname != NULL)
- strcpy (__ttyname, save_ttyname);
- if (result == NULL)
- errno = ENOENT;
return result;
}