citadel/getutline.c

   1 /*
   2  * $Id$
   3  *
   4  * getutline.c: not-quite-compatible replacement for getutline(3)
   5  * by nathan bryant, feb 1999
   6  *
   7  */
   8
   9 #include "sysdep.h"
  10 #ifdef HAVE_UTMP_H
  11 #include <stdio.h>
  12 #include <sys/types.h>
  13 #include <utmp.h>
  14 #ifdef HAVE_PATHS_H
  15 #include <paths.h>
  16 #endif
  17 #include <string.h>
  18
  19 struct utmp *getutline(struct utmp *ut)
  20 {
  21   static struct utmp retval;
  22   FILE *utmp;
  23
  24 #ifdef UTMP_FILE
  25   if ((utmp = fopen(UTMP_FILE, "rb")) == NULL)
  26 #else
  27   if ((utmp = fopen(_PATH_UTMP, "rb")) == NULL)
  28 #endif
  29     return NULL;
  30
  31   do
  32     if (!fread(&retval, sizeof retval, 1, utmp))
  33       {
  34         fclose(utmp);
  35         return NULL;
  36       }
  37   while (strcmp(ut->ut_line, retval.ut_line));
  38
  39   fclose(utmp);
  40   return &retval;
  41 }
  42 #endif /* HAVE_UTMP_H */