1 /* Copyright (C) 1996 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
26 /* For implementing this function we don't use the getutent_r function
27 because we can avoid the reposition on every new entry this way. */
29 __getutid_r (const struct utmp
*id
, struct utmp
**utmp
,
30 struct utmp_data
*utmp_data
)
32 #if (_HAVE_UT_ID - 0) && (_HAVE_UT_TYPE - 0)
33 /* Test whether ID has any of the legal types. */
34 if (id
->ut_type
!= RUN_LVL
&& id
->ut_type
!= BOOT_TIME
35 && id
->ut_type
!= OLD_TIME
&& id
->ut_type
!= NEW_TIME
36 && id
->ut_type
!= INIT_PROCESS
&& id
->ut_type
!= LOGIN_PROCESS
37 && id
->ut_type
!= USER_PROCESS
&& id
->ut_type
!= DEAD_PROCESS
)
38 /* No, using '<' and '>' for the test is not possible. */
44 /* Open utmp file if not already done. */
45 if (utmp_data
->ut_fd
== -1)
47 setutent_r (utmp_data
);
48 if (utmp_data
->ut_fd
== -1)
52 /* Position file correctly. */
53 if (lseek (utmp_data
->ut_fd
, utmp_data
->loc_utmp
, SEEK_SET
) == -1)
56 if (id
->ut_type
== RUN_LVL
|| id
->ut_type
== BOOT_TIME
57 || id
->ut_type
== OLD_TIME
|| id
->ut_type
== NEW_TIME
)
59 /* Search for next entry with type RUN_LVL, BOOT_TIME,
60 OLD_TIME, or NEW_TIME. */
64 /* Read the next entry. */
65 if (read (utmp_data
->ut_fd
, &utmp_data
->ubuf
, sizeof (struct utmp
))
66 != sizeof (struct utmp
))
68 utmp_data
->loc_utmp
= 0; /* Mark loc_utmp invalid. */
73 /* Update position pointer. */
74 utmp_data
->loc_utmp
+= sizeof (struct utmp
);
76 if (id
->ut_type
== utmp_data
->ubuf
.ut_type
)
82 /* Search for the next entry with the specified ID and with type
83 INIT_PROCESS, LOGIN_PROCESS, USER_PROCESS, or DEAD_PROCESS. */
87 /* Read the next entry. */
88 if (read (utmp_data
->ut_fd
, &utmp_data
->ubuf
, sizeof (struct utmp
))
89 != sizeof (struct utmp
))
91 utmp_data
->loc_utmp
= 0; /* Mark loc_utmp invalid. */
96 /* Update position pointer. */
97 utmp_data
->loc_utmp
+= sizeof (struct utmp
);
99 if (( utmp_data
->ubuf
.ut_type
== INIT_PROCESS
100 || utmp_data
->ubuf
.ut_type
== LOGIN_PROCESS
101 || utmp_data
->ubuf
.ut_type
== USER_PROCESS
102 || utmp_data
->ubuf
.ut_type
== DEAD_PROCESS
)
103 && (strncmp (utmp_data
->ubuf
.ut_id
, id
->ut_id
, sizeof id
->ut_id
)
109 *utmp
= &utmp_data
->ubuf
;
112 #else /* !_HAVE_UT_ID && !_HAVE_UT_TYPE */
117 weak_alias (__getutid_r
, getutid_r
)