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author | Roland McGrath <roland@gnu.org> | 1996-06-05 01:07:21 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 1996-06-05 01:07:21 +0000 |
commit | ee188d555b8c32ad9704a7440cab400af967292f (patch) | |
tree | 037a4821d35c11f2bbf89e7e71dc43dada67b166 /sysdeps/unix/getlogin.c | |
parent | f68b86cc7bdcee246296d49f3a3318c1b97693f0 (diff) | |
download | glibc-ee188d555b8c32ad9704a7440cab400af967292f.tar.gz |
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.c | 54 |
1 files changed, 19 insertions, 35 deletions
diff --git a/sysdeps/unix/getlogin.c b/sysdeps/unix/getlogin.c index 504a7aa4c0..00baf6875a 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; } |