1 /************************************************************************
2 * Copyright 1995 by Wietse Venema. All rights reserved. Some individual
3 * files may be covered by other copyrights.
4 *
5 * This material was originally written and compiled by Wietse Venema at
6 * Eindhoven University of Technology, The Netherlands, in 1990, 1991,
7 * 1992, 1993, 1994 and 1995.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that this entire copyright notice
11 * is duplicated in all such copies.
12 *
13 * This software is provided "as is" and without any expressed or implied
14 * warranties, including, without limitation, the implied warranties of
15 * merchantibility and fitness for any particular purpose.
16 ************************************************************************/
17 /* Author: Wietse Venema <wietse@wzv.win.tue.nl> */
18
19 #include "login_locl.h"
20
21 RCSID("$Id$");
22
23 /* utmpx_login - update utmp and wtmp after login */
24
25 #ifndef HAVE_UTMPX_H
utmpx_login(char * line,const char * user,const char * host)26 int utmpx_login(char *line, const char *user, const char *host) { return 0; }
27 #else
28
29 static void
utmpx_update(struct utmpx * ut,char * line,const char * user,const char * host)30 utmpx_update(struct utmpx *ut, char *line, const char *user, const char *host)
31 {
32 struct timeval tmp;
33 char *clean_tty = clean_ttyname(line);
34
35 strncpy(ut->ut_line, clean_tty, sizeof(ut->ut_line));
36 #ifdef HAVE_STRUCT_UTMPX_UT_ID
37 strncpy(ut->ut_id, make_id(clean_tty), sizeof(ut->ut_id));
38 #endif
39 strncpy(ut->ut_user, user, sizeof(ut->ut_user));
40 shrink_hostname (host, ut->ut_host, sizeof(ut->ut_host));
41 #ifdef HAVE_STRUCT_UTMPX_UT_SYSLEN
42 ut->ut_syslen = strlen(host) + 1;
43 if (ut->ut_syslen > sizeof(ut->ut_host))
44 ut->ut_syslen = sizeof(ut->ut_host);
45 #endif
46 ut->ut_type = USER_PROCESS;
47 gettimeofday (&tmp, 0);
48 ut->ut_tv.tv_sec = tmp.tv_sec;
49 ut->ut_tv.tv_usec = tmp.tv_usec;
50 pututxline(ut);
51 #ifdef WTMPX_FILE
52 updwtmpx(WTMPX_FILE, ut);
53 #elif defined(WTMP_FILE)
54 { /* XXX should be removed, just drop wtmp support */
55 struct utmp utmp;
56 int fd;
57
58 prepare_utmp (&utmp, line, user, host);
59 if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) {
60 write(fd, &utmp, sizeof(struct utmp));
61 close(fd);
62 }
63 }
64 #endif
65 }
66
67 int
utmpx_login(char * line,const char * user,const char * host)68 utmpx_login(char *line, const char *user, const char *host)
69 {
70 struct utmpx *ut, save_ut;
71 pid_t mypid = getpid();
72 int ret = (-1);
73
74 /*
75 * SYSV4 ttymon and login use tty port names with the "/dev/" prefix
76 * stripped off. Rlogind and telnetd, on the other hand, make utmpx
77 * entries with device names like /dev/pts/nnn. We therefore cannot use
78 * getutxline(). Return nonzero if no utmp entry was found with our own
79 * process ID for a login or user process.
80 */
81
82 while ((ut = getutxent())) {
83 /* Try to find a reusable entry */
84 if (ut->ut_pid == mypid
85 && ( ut->ut_type == INIT_PROCESS
86 || ut->ut_type == LOGIN_PROCESS
87 || ut->ut_type == USER_PROCESS)) {
88 save_ut = *ut;
89 utmpx_update(&save_ut, line, user, host);
90 ret = 0;
91 break;
92 }
93 }
94 if (ret == -1) {
95 /* Grow utmpx file by one record. */
96 struct utmpx newut;
97 memset(&newut, 0, sizeof(newut));
98 newut.ut_pid = mypid;
99 utmpx_update(&newut, line, user, host);
100 ret = 0;
101 }
102 endutxent();
103 return (ret);
104 }
105 #endif /* HAVE_UTMPX_H */
106