diff options
Diffstat (limited to 'login/setutent_r.c')
-rw-r--r-- | login/setutent_r.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/login/setutent_r.c b/login/setutent_r.c new file mode 100644 index 0000000000..715101d659 --- /dev/null +++ b/login/setutent_r.c @@ -0,0 +1,72 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +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., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <utmp.h> + +/* This is the default name. */ +static const char default_utmp_name[] = _PATH_UTMP; + +/* Current file name. */ +static const char *utmp_file_name = (const char *) default_utmp_name; + + +void +setutent_r (struct utmp_data *utmp_data) +{ + /* Before the UTMP_DATA is used before the first time the UT_FD + field must be set to -1. */ + if (utmp_data->ut_fd == -1) + { + utmp_data->ut_fd = open (utmp_file_name, O_RDWR); + if (utmp_data->ut_fd == -1) + { + /* Hhm, read-write access did not work. Try read-only. */ + utmp_data->ut_fd = open (utmp_file_name, O_RDONLY); + if (utmp_data->ut_fd == -1) + { + perror (_("while opening UTMP file")); + return; + } + } + } + + /* Remember we are at beginning of file. */ + utmp_data->loc_utmp = 0; + utmp_data->ubuf.ut_type = -1; +} + + +int +utmpname (const char *file) +{ + char *fname = strdup (file); + if (fname == NULL) + return 0; + + if (utmp_file_name != default_utmp_name) + free ((void *) utmp_file_name); + + utmp_file_name = fname; + + return 1; +} |