diff options
author | Ulrich Drepper <drepper@redhat.com> | 2000-04-18 18:38:50 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 2000-04-18 18:38:50 +0000 |
commit | 74f998221da8e1719ac95add005110676ebad6f2 (patch) | |
tree | b1f20e33d9434f31470184d0888ed820dfd3b36d /login/programs/database.c | |
parent | d9317f3d9285a88347386e7a4505dad7329c1cee (diff) | |
download | glibc-74f998221da8e1719ac95add005110676ebad6f2.tar.gz glibc-74f998221da8e1719ac95add005110676ebad6f2.tar.xz glibc-74f998221da8e1719ac95add005110676ebad6f2.zip |
Update.
2000-04-18 Ulrich Drepper <drepper@redhat.com> * login/programs/connection.c: Removed. * login/programs/database.c Removed. * login/programs/error.c: Removed. * login/programs/request.c: Removed. * login/programs/xtmp.c: Removed. * login/programs/xtmp.h: Removed. * login/Makefile: Remove rules for utmpd. * login/README.utmpd: Removed.
Diffstat (limited to 'login/programs/database.c')
-rw-r--r-- | login/programs/database.c | 543 |
1 files changed, 0 insertions, 543 deletions
diff --git a/login/programs/database.c b/login/programs/database.c deleted file mode 100644 index 4267c11186..0000000000 --- a/login/programs/database.c +++ /dev/null @@ -1,543 +0,0 @@ -/* Copyright (C) 1997 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997. - - 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 <assert.h> -#include <errno.h> -#include <fcntl.h> -#include <string.h> -#include <stdlib.h> -#include <sys/stat.h> -#include <time.h> -#include <unistd.h> -#include <utmp.h> -#include <libintl.h> - - -#include "utmpd-private.h" -#include "xtmp.h" - - -/* Prototypes for the local functions. */ -static int initialize_database (utmp_database *database); -static int store_state_entry (utmp_database *database, int old_position, - const struct utmp *old_entry); -static int store_process_entry (utmp_database *database, int old_position, - const struct utmp *old_entry); -static int replace_entry (utmp_database *database, int old_position, - int new_position, const struct utmp *entry); -static int store_entry (utmp_database *database, int position, - const struct utmp *entry); -static int get_mtime (int filedes, time_t *timer); - - -/* Open the database specified by FILE and merge it with the contents - of the old format file specified by OLD_FILE. Returns a pointer to - a newly allocated structure describing the database, or NULL on - error. */ -utmp_database * -open_database (const char *file, const char *old_file) -{ - mode_t mode = S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH; - utmp_database *database; - - /* Allocate memory. */ - database = (utmp_database *) malloc (sizeof (utmp_database)); - if (database == NULL) - { - error (0, 0, _("memory exhausted")); - return NULL; - } - - memset (database, 0, sizeof (utmp_database)); - - /* Open database, create it if it doesn't exist already. */ - database->fd = open (file, O_RDWR | O_CREAT, mode); - if (database->fd < 0) - { - error (0, errno, "%s", file); - goto return_error; - } - - database->file = strdup (file); - if (database->file == NULL) - { - error (0, 0, _("memory exhausted")); - goto return_error; - } - - if (old_file) - { - database->old_fd = open (old_file, O_RDWR|O_CREAT, mode); - if (database->old_fd < 0) - { - error (0, errno, "%s", old_file); - goto return_error; - } - - database->old_file = strdup (old_file); - if (database->old_file == NULL) - { - error (0, 0, _("memory exhausted")); - goto return_error; - } - } - - /* Initialize database. */ - if (initialize_database (database) < 0) - goto return_error; - - return database; - -return_error: - close_database (database); - - return NULL; -} - -/* Synchronize DATABASE. */ -int -synchronize_database (utmp_database *database) -{ - assert (database); - - /* Check if there is a file in the old format, that we have to - synchronize with. */ - if (database->old_file) - { - time_t curtime; - time_t mtime; - - curtime = time (NULL); - - if (get_mtime (database->old_fd, &mtime) < 0) - { - error (0, errno, _("%s: cannot get modification time"), - database->old_file); - return -1; - } - - if (mtime >= database->mtime) - { - int position = 0; - struct utmp entry; - struct utmp old_entry; - - while (1) - { - if (read_old_entry (database, position, &old_entry) < 0) - break; - - if (read_entry (database, position, &entry) < 0 - || !compare_entry (&old_entry, &entry)) - { - if (write_entry (database, position, &old_entry) < 0) - { - error (0, errno, "%s", database->file); - return -1; - } - } - - position++; - } - - database->mtime = curtime; - } - - } - - return 0; -} - - -/* Close DATABASE. */ -void -close_database (utmp_database *database) -{ - assert (database); - - if (database->fd >= 0) - close (database->fd); - - if (database->old_fd >= 0) - close (database->old_fd); - - /* Free allocated memory. */ - if (database->file) - free (database->file); - if (database->old_file) - free (database->old_file); - free (database); -} - - -/* Read the entry at POSITION in DATABASE and store the result in - ENTRY. Returns 0 if successful, -1 if not. */ -int -read_entry (utmp_database *database, int position, struct utmp *entry) -{ - ssize_t nbytes; - off_t offset; - - offset = position * sizeof (struct utmp); - if (lseek (database->fd, offset, SEEK_SET) < 0) - return -1; - - nbytes = read (database->fd, entry, sizeof (struct utmp)); - if (nbytes != sizeof (struct utmp)) - return -1; - - return 0; -} - - -/* Write ENTRY at POSITION in DATABASE. Returns 0 if successful, -1 - on error. */ -int -write_entry (utmp_database *database, int position, - const struct utmp *entry) -{ - int result = -1; - struct flock fl; - ssize_t nbytes; - off_t offset; - - /* Try to lock the file. */ - memset (&fl, 0, sizeof (struct flock)); - fl.l_type = F_WRLCK; - fl.l_whence = SEEK_SET; - fcntl (database->fd, F_SETLKW, &fl); - - offset = position * sizeof (struct utmp); - if (lseek (database->fd, offset, SEEK_SET) < 0) - goto fail; - - nbytes = write (database->fd, entry, sizeof (struct utmp)); - if (nbytes != sizeof (struct utmp)) - { - ftruncate (database->fd, offset); - goto fail; - } - - result = 0; - -fail: - /* And unlock the file. */ - fl.l_type = F_UNLCK; - fcntl (database->fd, F_SETLKW, &fl); - - return result; -} - - -/* Append ENTRY to DATABASE. Returns the position of the appended - entry if successful, or -1 on error. */ -int -append_entry (utmp_database *database, const struct utmp *entry) -{ - int result = -1; - struct flock fl; - ssize_t nbytes; - off_t offset; - - /* Try to lock the file. */ - memset (&fl, 0, sizeof (struct flock)); - fl.l_type = F_WRLCK; - fl.l_whence = SEEK_SET; - fcntl (database->fd, F_SETLKW, &fl); - - offset = lseek (database->fd, 0, SEEK_END); - if (offset % sizeof (struct utmp) != 0) - { - offset -= offset % sizeof (struct utmp); - ftruncate (database->fd, offset); - - if (lseek (database->fd, 0, SEEK_END) < 0) - goto fail; - } - - nbytes = write (database->fd, entry, sizeof (struct utmp)); - if (nbytes != sizeof (struct utmp)) - { - ftruncate (database->fd, offset); - goto fail; - } - - result = offset / sizeof (struct utmp); - -fail: - /* And unlock the file. */ - fl.l_type = F_UNLCK; - fcntl (database->fd, F_SETLKW, &fl); - - return result; -} - - -int -read_old_entry (utmp_database *database, int position, - struct utmp *entry) -{ - struct xtmp old_entry; - ssize_t nbytes; - off_t offset; - - offset = position * sizeof (struct xtmp); - if (lseek (database->old_fd, offset, SEEK_SET) < 0) - return -1; - - nbytes = read (database->old_fd, &old_entry, sizeof (struct xtmp)); - if (nbytes != sizeof (struct xtmp)) - return -1; - - xtmp_to_utmp (&old_entry, entry); - return 0; -} - - -int -write_old_entry (utmp_database *database, int position, - const struct utmp *entry) -{ - struct xtmp old_entry; - ssize_t nbytes; - off_t offset; - - utmp_to_xtmp (entry, &old_entry); - - offset = position * sizeof (struct xtmp); - if (lseek (database->old_fd, offset, SEEK_SET) < 0) - return -1; - - nbytes = write (database->old_fd, &old_entry, sizeof (struct xtmp)); - if (nbytes != sizeof (struct xtmp)) - return -1; - - return 0; -} - - -/* Initialize DATABASE. */ -static int -initialize_database (utmp_database *database) -{ - struct utmp entry; - int position = 0; - - assert (database); - - /* Check if there is a file in the old format to read. */ - if (database->old_file) - { - while (1) - { - if (read_old_entry (database, position, &entry) < 0) - break; - -#if _HAVE_UT_TYPE - 0 - /* If the login type is one of RUN_LVL, BOOT_TIME, OLD_TIME or - NEW_TIME, search for an entry of the same type in the - database, and replace it if the entry in the file is newer. */ - if (entry.ut_type == RUN_LVL || entry.ut_type == BOOT_TIME - || entry.ut_type == OLD_TIME || entry.ut_type == NEW_TIME) - { - if (store_state_entry (database, position, &entry) < 0) - { - error (0, errno, "%s", database->file); - return -1; - } - } - else -#endif - { - if (store_process_entry (database, position, &entry) < 0) - { - error (0, errno, "%s", database->file); - return -1; - } - } - - /* Update position. */ - position++; - } - - while (1) - { - if (read_entry (database, position, &entry) < 0) - break; - - if (write_old_entry (database, position, &entry) < 0) - { - error (0, errno, "%s", database->file); - return -1; - } - - /* Update position. */ - position++; - } - } - - return synchronize_database (database); -} - - -#if _HAVE_UT_TYPE - 0 -static int -store_state_entry (utmp_database *database, int old_position, - const struct utmp *old_entry) -{ - struct utmp new_entry; - int new_position = 0; - int found = 0; - - assert (old_entry->ut_type == RUN_LVL - || old_entry->ut_type == BOOT_TIME - || old_entry->ut_type == OLD_TIME - || old_entry->ut_type == NEW_TIME); - - while (!found) - { - /* Read the next entry. */ - if (read_entry (database, new_position, &new_entry) < 0) - break; - - if (old_entry->ut_type == new_entry.ut_type) - { - found = 1; - continue; - } - - /* Update position. */ - new_position++; - } - - if (found) - { - const struct utmp *entry; - - if ( -#if _HAVE_UT_TV - 0 - old_entry->ut_tv.tv_sec > new_entry.ut_tv.tv_sec -#else - old_entry->ut_time > new_entry.ut_time -#endif - ) - entry = old_entry; - else - entry = &new_entry; - - return replace_entry (database, old_position, new_position, entry); - } - - return store_entry (database, old_position, old_entry); -} -#endif - - -static int -store_process_entry (utmp_database *database, int old_position, - const struct utmp *old_entry) -{ - struct utmp new_entry; - int new_position = 0; - int found = 0; - - while (!found) - { - /* Read the next entry. */ - if (read_entry (database, new_position, &new_entry) < 0) - break; - - if (proc_utmp_eq (old_entry, &new_entry)) - { - found = 1; - continue; - } - - /* Update position. */ - new_position++; - } - - if (found) - { - const struct utmp *entry; - - if ( -#if _HAVE_UT_TV - 0 - old_entry->ut_tv.tv_sec > new_entry.ut_tv.tv_sec -#else - old_entry->ut_time > new_entry.ut_time -#endif - ) - entry = old_entry; - else - entry = &new_entry; - - return replace_entry (database, old_position, new_position, entry); - } - - return store_entry (database, old_position, old_entry); -} - - -static int -replace_entry (utmp_database *database, int old_position, int new_position, - const struct utmp *entry) -{ - struct utmp tmp; - - if (read_entry (database, old_position, &tmp) < 0 - || write_entry (database, old_position, entry) < 0 - || write_entry (database, new_position, &tmp) < 0) - return -1; - - return 0; -} - - -static int -store_entry (utmp_database *database, int position, - const struct utmp *entry) -{ - struct utmp tmp; - - if (read_entry (database, position, &tmp) < 0) - return write_entry (database, position, entry); - - if (write_entry (database, position, entry) < 0 - || append_entry (database, &tmp) < 0) - return -1; - - return 0; -} - - -/* Get modification time of the file with file descriptor FILEDES and - put it in TIMER. Returns 0 if successful, -1 if not. */ -static int -get_mtime (int filedes, time_t *timer) -{ - struct stat st; - - if (fstat (filedes, &st) < 0) - return -1; - - *timer = st.st_mtime; - - return 0; -} |