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/* -*- mode: C; c-file-style: "gnu" -*- */
/* dbus-sysdeps.h Wrappers around system/libc features (internal to D-BUS implementation)
*
* Copyright (C) 2002, 2003 Red Hat, Inc.
* Copyright (C) 2003 CodeFactory AB
*
* Licensed under the Academic Free License version 1.2
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef DBUS_SYSDEPS_H
#define DBUS_SYSDEPS_H
#include <dbus/dbus-string.h>
#include <dbus/dbus-errors.h>
/* this is perhaps bogus, but strcmp() etc. are faster if we use the
* stuff straight out of string.h, so have this here for now.
*/
#include <string.h>
/* and it would just be annoying to abstract this */
#include <errno.h>
DBUS_BEGIN_DECLS;
/* The idea of this file is to encapsulate everywhere that we're
* relying on external libc features, for ease of security
* auditing. The idea is from vsftpd. This also gives us a chance to
* make things more convenient to use, e.g. by reading into a
* DBusString. Operating system headers aren't intended to be used
* outside of this file and a limited number of others (such as
* dbus-memory.c)
*/
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
#define _DBUS_GNUC_PRINTF( format_idx, arg_idx ) \
__attribute__((__format__ (__printf__, format_idx, arg_idx)))
#define _DBUS_GNUC_SCANF( format_idx, arg_idx ) \
__attribute__((__format__ (__scanf__, format_idx, arg_idx)))
#define _DBUS_GNUC_FORMAT( arg_idx ) \
__attribute__((__format_arg__ (arg_idx)))
#define _DBUS_GNUC_NORETURN \
__attribute__((__noreturn__))
#else /* !__GNUC__ */
#define _DBUS_GNUC_PRINTF( format_idx, arg_idx )
#define _DBUS_GNUC_SCANF( format_idx, arg_idx )
#define _DBUS_GNUC_FORMAT( arg_idx )
#define _DBUS_GNUC_NORETURN
#endif /* !__GNUC__ */
void _dbus_abort (void) _DBUS_GNUC_NORETURN;
const char* _dbus_getenv (const char *varname);
dbus_bool_t _dbus_setenv (const char *varname,
const char *value);
int _dbus_read (int fd,
DBusString *buffer,
int count);
int _dbus_write (int fd,
const DBusString *buffer,
int start,
int len);
int _dbus_write_two (int fd,
const DBusString *buffer1,
int start1,
int len1,
const DBusString *buffer2,
int start2,
int len2);
typedef unsigned long dbus_pid_t;
typedef unsigned long dbus_uid_t;
typedef unsigned long dbus_gid_t;
#define DBUS_PID_UNSET ((dbus_pid_t) -1)
#define DBUS_UID_UNSET ((dbus_uid_t) -1)
#define DBUS_GID_UNSET ((dbus_gid_t) -1)
#define DBUS_PID_FORMAT "%lu"
#define DBUS_UID_FORMAT "%lu"
#define DBUS_GID_FORMAT "%lu"
typedef struct
{
/* Set to DBUS_PID_UNSET etc. if not available */
dbus_pid_t pid;
dbus_uid_t uid;
dbus_gid_t gid;
} DBusCredentials;
int _dbus_connect_unix_socket (const char *path,
DBusError *error);
int _dbus_listen_unix_socket (const char *path,
DBusError *error);
int _dbus_connect_tcp_socket (const char *host,
dbus_uint32_t port,
DBusError *error);
int _dbus_listen_tcp_socket (const char *host,
dbus_uint32_t port,
DBusError *error);
int _dbus_accept (int listen_fd);
dbus_bool_t _dbus_read_credentials_unix_socket (int client_fd,
DBusCredentials *credentials,
DBusError *error);
dbus_bool_t _dbus_send_credentials_unix_socket (int server_fd,
DBusError *error);
void _dbus_credentials_clear (DBusCredentials *credentials);
void _dbus_credentials_from_current_process (DBusCredentials *credentials);
dbus_bool_t _dbus_credentials_match (const DBusCredentials *expected_credentials,
const DBusCredentials *provided_credentials);
typedef struct DBusUserInfo DBusUserInfo;
typedef struct DBusGroupInfo DBusGroupInfo;
struct DBusUserInfo
{
dbus_uid_t uid; /**< UID */
dbus_gid_t primary_gid; /**< GID */
dbus_gid_t *group_ids; /**< Groups IDs, *including* above primary group */
int n_group_ids; /**< Size of group IDs array */
char *username; /**< Username */
char *homedir; /**< Home directory */
};
struct DBusGroupInfo
{
dbus_gid_t gid; /**< GID */
char *groupname; /**< Group name */
};
dbus_bool_t _dbus_user_info_fill (DBusUserInfo *info,
const DBusString *username,
DBusError *error);
dbus_bool_t _dbus_user_info_fill_uid (DBusUserInfo *info,
dbus_uid_t uid,
DBusError *error);
void _dbus_user_info_free (DBusUserInfo *info);
dbus_bool_t _dbus_group_info_fill (DBusGroupInfo *info,
const DBusString *groupname,
DBusError *error);
dbus_bool_t _dbus_group_info_fill_gid (DBusGroupInfo *info,
dbus_gid_t gid,
DBusError *error);
void _dbus_group_info_free (DBusGroupInfo *info);
unsigned long _dbus_getpid (void);
dbus_uid_t _dbus_getuid (void);
dbus_gid_t _dbus_getgid (void);
typedef dbus_int32_t dbus_atomic_t;
dbus_atomic_t _dbus_atomic_inc (volatile dbus_atomic_t *atomic);
dbus_atomic_t _dbus_atomic_dec (volatile dbus_atomic_t *atomic);
#define _DBUS_POLLIN 0x0001 /* There is data to read */
#define _DBUS_POLLPRI 0x0002 /* There is urgent data to read */
#define _DBUS_POLLOUT 0x0004 /* Writing now will not block */
#define _DBUS_POLLERR 0x0008 /* Error condition */
#define _DBUS_POLLHUP 0x0010 /* Hung up */
#define _DBUS_POLLNVAL 0x0020 /* Invalid request: fd not open */
typedef struct
{
int fd;
short events;
short revents;
} DBusPollFD;
int _dbus_poll (DBusPollFD *fds,
int n_fds,
int timeout_milliseconds);
void _dbus_sleep_milliseconds (int milliseconds);
void _dbus_get_current_time (long *tv_sec,
long *tv_usec);
dbus_bool_t _dbus_file_get_contents (DBusString *str,
const DBusString *filename,
DBusError *error);
dbus_bool_t _dbus_string_save_to_file (const DBusString *str,
const DBusString *filename,
DBusError *error);
dbus_bool_t _dbus_create_file_exclusively (const DBusString *filename,
DBusError *error);
dbus_bool_t _dbus_delete_file (const DBusString *filename,
DBusError *error);
dbus_bool_t _dbus_create_directory (const DBusString *filename,
DBusError *error);
dbus_bool_t _dbus_concat_dir_and_file (DBusString *dir,
const DBusString *next_component);
dbus_bool_t _dbus_string_get_dirname (const DBusString *filename,
DBusString *dirname);
dbus_bool_t _dbus_path_is_absolute (const DBusString *filename);
typedef struct DBusDirIter DBusDirIter;
DBusDirIter* _dbus_directory_open (const DBusString *filename,
DBusError *error);
dbus_bool_t _dbus_directory_get_next_file (DBusDirIter *iter,
DBusString *filename,
DBusError *error);
void _dbus_directory_close (DBusDirIter *iter);
dbus_bool_t _dbus_generate_random_bytes (DBusString *str,
int n_bytes);
dbus_bool_t _dbus_generate_random_ascii (DBusString *str,
int n_bytes);
const char *_dbus_errno_to_string (int errnum);
const char* _dbus_error_from_errno (int error_number);
void _dbus_disable_sigpipe (void);
void _dbus_fd_set_close_on_exec (int fd);
void _dbus_exit (int code) _DBUS_GNUC_NORETURN;
typedef struct
{
unsigned long mode;
unsigned long nlink;
dbus_uid_t uid;
dbus_gid_t gid;
unsigned long size;
unsigned long atime;
unsigned long mtime;
unsigned long ctime;
} DBusStat;
dbus_bool_t _dbus_stat (const DBusString *filename,
DBusStat *statbuf,
DBusError *error);
dbus_bool_t _dbus_full_duplex_pipe (int *fd1,
int *fd2,
dbus_bool_t blocking,
DBusError *error);
dbus_bool_t _dbus_close (int fd,
DBusError *error);
void _dbus_print_backtrace (void);
dbus_bool_t _dbus_become_daemon (const DBusString *pidfile,
DBusError *error);
dbus_bool_t _dbus_write_pid_file (const DBusString *filename,
unsigned long pid,
DBusError *error);
dbus_bool_t _dbus_change_identity (unsigned long uid,
unsigned long gid,
DBusError *error);
typedef void (* DBusSignalHandler) (int sig);
void _dbus_set_signal_handler (int sig,
DBusSignalHandler handler);
DBUS_END_DECLS;
#endif /* DBUS_SYSDEPS_H */
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