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/* GDM - The GNOME Display Manager
* Copyright (C) 1998, 1999, 2000 Martin K. Petersen <mkp@mkp.net>
*
* 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 GDM_MISC_H
#define GDM_MISC_H
#include <stdio.h>
#include <sys/types.h>
#include "gdm.h"
#include "display.h"
void gdm_fail (const gchar *format, ...) G_GNUC_PRINTF (1, 2);
void gdm_fdprintf (int fd, const gchar *format, ...) G_GNUC_PRINTF (2, 3);
int gdm_fdgetc (int fd);
char *gdm_fdgets (int fd);
/* clear environment, but keep the i18n ones (LANG, LC_ALL, etc...),
* note that this leak memory so only use before exec */
void gdm_clearenv_no_lang (void);
int gdm_get_free_display (int start, uid_t server_uid);
gboolean gdm_text_message_dialog (const char *msg);
gboolean gdm_text_yesno_dialog (const char *msg, gboolean *ret);
int gdm_exec_wait (char * const *argv, gboolean no_display,
gboolean de_setuid);
/* done before each login. This can do so sanity ensuring,
* one of the things it does now is make sure /tmp/.ICE-unix
* exists and has the correct permissions */
void gdm_ensure_sanity (void);
/* This is for race free forks */
void gdm_sigchld_block_push (void);
void gdm_sigchld_block_pop (void);
void gdm_sigterm_block_push (void);
void gdm_sigterm_block_pop (void);
void gdm_sigusr2_block_push (void);
void gdm_sigusr2_block_pop (void);
pid_t gdm_fork_extra (void);
void gdm_wait_for_extra (pid_t pid, int *status);
const GList * gdm_address_peek_local_list (void);
gboolean gdm_address_is_local (struct sockaddr_storage *sa);
typedef struct {
gboolean not_found; /* hostname below set to fallback,
as gethostbyaddr/name failed */
char *hostname; /* never a bogus dot, if
invalid/unknown, then set to the
ip address in string form */
struct sockaddr_storage *addrs;
int addr_count;
} GdmHostent;
GdmHostent * gdm_gethostbyname (const char *name);
GdmHostent *gdm_gethostbyaddr (struct sockaddr_storage *ia);
GdmHostent * gdm_hostent_copy (GdmHostent *he);
void gdm_hostent_free (GdmHostent *he);
gboolean gdm_setup_gids (const char *login, gid_t gid);
void gdm_desetuid (void);
gboolean gdm_test_opt (const char *cmd, const char *help, const char *option);
void gdm_close_all_descriptors (int from, int except, int except2);
int gdm_open_dev_null (mode_t mode);
void gdm_unset_signals (void);
void gdm_saveenv (void);
const char * gdm_saved_getenv (const char *var);
/* leaks */
void gdm_restoreenv (void);
/* like fopen with "w" but unlinks and uses O_EXCL */
FILE * gdm_safe_fopen_w (const char *file, mode_t perm);
/* like fopen with "a+" and uses O_EXCL and O_NOFOLLOW */
FILE * gdm_safe_fopen_ap (const char *file, mode_t perm);
/* first must get initial limits before attempting to ever reset those
limits */
void gdm_get_initial_limits (void);
void gdm_reset_limits (void);
void gdm_reset_locale (void);
const char *gdm_root_user (void);
#include <setjmp.h>
/* stolen from xdm sources */
#if defined(X_NOT_POSIX) || defined(__EMX__) || defined(__NetBSD__) && defined(__sparc__)
#define Setjmp(e) setjmp(e)
#define Longjmp(e,v) longjmp(e,v)
#define Jmp_buf jmp_buf
#else
#define Setjmp(e) sigsetjmp(e,1)
#define Longjmp(e,v) siglongjmp(e,v)
#define Jmp_buf sigjmp_buf
#endif
void gdm_signal_ignore (int signal);
void gdm_signal_default (int signal);
void gdm_sleep_no_signal (int secs);
/* somewhat like g_build_filename, but does somet hing like
* <dir> "/" <name> <extension>
*/
char * gdm_make_filename (const char *dir, const char *name, const char *extension);
char * gdm_ensure_extension (const char *name, const char *extension);
char * gdm_strip_extension (const char *name, const char *extension);
void gdm_twiddle_pointer (GdmDisplay *disp);
char * gdm_get_last_info (const char *username);
gboolean gdm_ok_console_language (void);
const char * gdm_console_translate (const char *str);
/* Use with C_(N_("foo")) to make gettext work it out right */
#define C_(x) (gdm_console_translate(x))
gchar * gdm_read_default (gchar *key);
#define NEVER_FAILS_seteuid(uid) \
{ int r = 0; \
if (geteuid () != uid) \
r = seteuid (uid); \
if G_UNLIKELY (r != 0) \
gdm_fail ("GDM file %s: line %d (%s): Cannot run seteuid to %d: %s", \
__FILE__, \
__LINE__, \
G_GNUC_PRETTY_FUNCTION, \
(int)uid, \
strerror (errno)); }
#define NEVER_FAILS_setegid(gid) \
{ int r = 0; \
if (getegid () != gid) \
r = setegid (gid); \
if G_UNLIKELY (r != 0) \
gdm_fail ("GDM file %s: line %d (%s): Cannot run setegid to %d: %s", \
__FILE__, \
__LINE__, \
G_GNUC_PRETTY_FUNCTION, \
(int)gid, \
strerror (errno)); }
/* first goes to euid-root and then sets the egid and euid, to make sure
* this succeeds */
#define NEVER_FAILS_root_set_euid_egid(uid,gid) \
{ NEVER_FAILS_seteuid (0); \
NEVER_FAILS_setegid (gid); \
if (uid != 0) { NEVER_FAILS_seteuid (uid); } }
#endif /* GDM_MISC_H */
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