contrib/opie/libopie/getutmpentry.c

   1 /* getutmpentry.c: The __opiegetutmpentry() library function.
   2
   3 %%% copyright-cmetz-96
   4 This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
   5 The Inner Net License Version 3 applies to this software.
   6 You should have received a copy of the license with this software. If
   7 you 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
  37 struct utmp *getutline __P((struct utmp *));
  38 #endif /* HAVE_GETUTLINE && !DOUTMPX */
  39
  40 static struct utmp u;
  41
  42 int __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
  78 gotit:
  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 }