getutmpentry.c revision 92906 
1/* getutmpentry.c: The __opiegetutmpentry() library function.
2
3%%% copyright-cmetz-96
4This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
5The Inner Net License Version 3 applies to this software.
6You should have received a copy of the license with this software. If
7you didn't get a copy, you may request one from <license@inner.net>.
8
9        History:
10
11	Modified by cmetz for OPIE 2.31. Cache result.
12        Created by cmetz for OPIE 2.3 (re-write).
13*/
14
15#include "opie_cfg.h"
16#include <stdio.h>
17#include <sys/types.h>
18#include <utmp.h>
19
20#if DOUTMPX
21#include <utmpx.h>
22#define setutent setutxent
23#define getutline(x) getutxline(x)
24#define utmp utmpx
25#endif /* DOUTMPX */
26
27#if HAVE_STRING_H
28#include <string.h>
29#endif /* HAVE_STRING_H */
30
31#if DEBUG
32#include <syslog.h>
33#endif /* DEBUG */
34#include "opie.h"
35
36#if !HAVE_GETUTLINE && !DOUTMPX
37struct utmp *getutline __P((struct utmp *));
38#endif /* HAVE_GETUTLINE && !DOUTMPX */
39
40static struct utmp u;
41
42int __opiegetutmpentry FUNCTION((line, utmp), char *line AND struct utmp *utmp)
43{
44  struct utmp *pu;
45
46  if (u.ut_line[0]) {
47    pu = &u;
48    goto gotit;
49  };
50
51  memset(&u, 0, sizeof(u));
52
53  if (!strncmp(line, "/dev/", 5)) {
54    strncpy(u.ut_line, line + 5, sizeof(u.ut_line));
55    setutent();
56    if ((pu = getutline(&u)))
57      goto gotit;
58
59#ifdef hpux
60    strcpy(u.ut_line, "pty/");
61    strncpy(u.ut_line + 4, line + 5, sizeof(u.ut_line) - 4);
62    setutent();
63    if ((pu = getutline(&u)))
64      goto gotit;
65#endif /* hpux */
66  }
67
68  strncpy(u.ut_line, line, sizeof(u.ut_line));
69  setutent();
70  if ((pu = getutline(&u)))
71    goto gotit;
72
73#if DEBUG
74  syslog(LOG_DEBUG, "__opiegetutmpentry: failed to find entry for line %s", line);
75#endif /* DEBUG */
76  return -1;
77
78gotit:
79#if DEBUG
80  syslog(LOG_DEBUG, "__opiegetutmpentry: succeeded with line %s", pu->ut_line);
81#endif /* DEBUG */
82  memcpy(utmp, pu, sizeof(struct utmp));
83  return 0;
84}
85