3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 #pragma weak _getlogin = getlogin
33 #pragma weak _getlogin_r = getlogin_r
34
35 #include "lint.h"
36 #include <sys/types.h>
37 #include <sys/stat.h>
38 #include <fcntl.h>
39 #include <string.h>
40 #include <stdlib.h>
41 #include <limits.h>
42 #include "utmpx.h"
43 #include <unistd.h>
44 #include <errno.h>
45 #include <thread.h>
46 #include <synch.h>
47 #include <mtlib.h>
48 #include "tsd.h"
49
50 /*
51 * XXX - _POSIX_LOGIN_NAME_MAX limits the length of a login name. The utmpx
52 * interface provides for a 32 character login name, but for the sake of
53 * compatibility, we are still using the old utmp-imposed limit.
54 */
55
56 /*
57 * POSIX.1c Draft-6 version of the function getlogin_r.
58 * It was implemented by Solaris 2.3.
59 */
60 char *
61 getlogin_r(char *answer, int namelen)
62 {
63 int uf;
64 off64_t me;
65 struct futmpx ubuf;
66
67 if (namelen < _POSIX_LOGIN_NAME_MAX) {
68 errno = ERANGE;
69 return (NULL);
70 }
71
72 if ((me = (off64_t)ttyslot()) < 0)
73 return (NULL);
74 if ((uf = open64(UTMPX_FILE, 0)) < 0)
75 return (NULL);
76 (void) lseek64(uf, me * sizeof (ubuf), SEEK_SET);
77 if (read(uf, &ubuf, sizeof (ubuf)) != sizeof (ubuf)) {
78 (void) close(uf);
79 return (NULL);
80 }
81 (void) close(uf);
82 if (ubuf.ut_user[0] == '\0')
83 return (NULL);
84 (void) strncpy(&answer[0], &ubuf.ut_user[0],
85 _POSIX_LOGIN_NAME_MAX - 1);
86 answer[_POSIX_LOGIN_NAME_MAX - 1] = '\0';
87 return (&answer[0]);
88 }
89
90 /*
91 * POSIX.1c standard version of the function getlogin_r.
92 * User gets it via static getlogin_r from the header file.
93 */
94 int
95 __posix_getlogin_r(char *name, int namelen)
96 {
97 int nerrno = 0;
98 int oerrno = errno;
99
100 errno = 0;
101 if (getlogin_r(name, namelen) == NULL) {
102 if (errno == 0)
103 nerrno = EINVAL;
104 else
105 nerrno = errno;
106 }
107 errno = oerrno;
108 return (nerrno);
109 }
110
111 char *
112 getlogin(void)
113 {
114 char *answer = tsdalloc(_T_LOGIN, _POSIX_LOGIN_NAME_MAX, NULL);
115
116 if (answer == NULL)
117 return (NULL);
118 return (getlogin_r(answer, _POSIX_LOGIN_NAME_MAX));
119 }
|
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2013 Gary Mills
24 *
25 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 /* Copyright (c) 1988 AT&T */
30 /* All Rights Reserved */
31
32 #pragma weak _getlogin = getlogin
33 #pragma weak _getlogin_r = getlogin_r
34
35 #include "lint.h"
36 #include <sys/types.h>
37 #include <sys/stat.h>
38 #include <fcntl.h>
39 #include <string.h>
40 #include <stdlib.h>
41 #include <limits.h>
42 #include "utmpx.h"
43 #include <unistd.h>
44 #include <errno.h>
45 #include <thread.h>
46 #include <synch.h>
47 #include <mtlib.h>
48 #include "tsd.h"
49
50 /*
51 * Use the full length of a login name, from LOGIN_NAME_MAX .
52 * The utmpx interface provides for a 32 character login name.
53 */
54
55 /*
56 * POSIX.1c Draft-6 version of the function getlogin_r.
57 * It was implemented by Solaris 2.3.
58 */
59 char *
60 getlogin_r(char *answer, int namelen)
61 {
62 int uf;
63 off64_t me;
64 struct futmpx ubuf;
65
66 /* Required minimum */
67 if (namelen < _POSIX_LOGIN_NAME_MAX) {
68 errno = ERANGE;
69 return (NULL);
70 }
71
72 if ((me = (off64_t)ttyslot()) < 0)
73 return (NULL);
74 if ((uf = open64(UTMPX_FILE, 0)) < 0)
75 return (NULL);
76 (void) lseek64(uf, me * sizeof (ubuf), SEEK_SET);
77 if (read(uf, &ubuf, sizeof (ubuf)) != sizeof (ubuf)) {
78 (void) close(uf);
79 return (NULL);
80 }
81 (void) close(uf);
82 if (ubuf.ut_user[0] == '\0')
83 return (NULL);
84
85 /* Insufficient buffer size */
86 if (namelen < strnlen(&ubuf.ut_user[0], LOGIN_NAME_MAX - 1)) {
87 errno = ERANGE;
88 return (NULL);
89 }
90 (void) strncpy(&answer[0], &ubuf.ut_user[0],
91 LOGIN_NAME_MAX - 1);
92 answer[LOGIN_NAME_MAX - 1] = '\0';
93 return (&answer[0]);
94 }
95
96 /*
97 * POSIX.1c standard version of the function getlogin_r.
98 * User gets it via static getlogin_r from the header file.
99 */
100 int
101 __posix_getlogin_r(char *name, int namelen)
102 {
103 int nerrno = 0;
104 int oerrno = errno;
105
106 errno = 0;
107 if (getlogin_r(name, namelen) == NULL) {
108 if (errno == 0)
109 nerrno = EINVAL;
110 else
111 nerrno = errno;
112 }
113 errno = oerrno;
114 return (nerrno);
115 }
116
117 char *
118 getlogin(void)
119 {
120 char *answer = tsdalloc(_T_LOGIN, LOGIN_NAME_MAX, NULL);
121
122 if (answer == NULL)
123 return (NULL);
124 return (getlogin_r(answer, LOGIN_NAME_MAX));
125 }
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