sysdeps/unix/sysv/linux/s390/s390-32/utmpx32.c

   1 /* Copyright (C) 2008, 2010 Free Software Foundation, Inc.
   2    Contributed by Andreas Krebbel <Andreas.Krebbel@de.ibm.com>.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/types.h>
  20 #include <utmp.h>
  21 #include <errno.h>
  22 #include <libc-symbols.h>
  23
  24 #include "utmp32.h"
  25 #include "utmp-convert.h"
  26
  27 #include "utmpx32.h"
  28 #include "utmpx-convert.h"
  29
  30 /* Allocate a static buffer to be returned to the caller.  As well as
  31    with the existing version of these functions the caller has to be
  32    aware that the contents of this buffer will change with subsequent
  33    calls.  */
  34 #define ALLOCATE_UTMPX32_OUT(OUT)                       \
  35   static struct utmpx32 *OUT = NULL;                    \
  36                                                         \
  37   if (OUT == NULL)                                      \
  38     {                                                   \
  39       OUT = malloc (sizeof (struct utmpx32));           \
  40       if (OUT == NULL)                                  \
  41         return NULL;                                    \
  42     }
  43
  44 /* Perform a lookup for a utmpx entry matching FIELD using function
  45    FUNC.  FIELD is converted to a 64 bit utmpx and the result is
  46    converted back to 32 bit utmpx.  */
  47 #define ACCESS_UTMPX_ENTRY(FUNC, FIELD)                 \
  48   struct utmpx in64;                                    \
  49   struct utmpx *out64;                                  \
  50   ALLOCATE_UTMPX32_OUT (out32);                         \
  51                                                         \
  52   utmpx_convert32to64 (FIELD, &in64);                   \
  53   out64 = FUNC (&in64);                                 \
  54                                                         \
  55   if (out64 == NULL)                                    \
  56     return NULL;                                        \
  57                                                         \
  58   utmpx_convert64to32 (out64, out32);                   \
  59                                                         \
  60   return out32;
  61
  62
  63 /* Get the next entry from the user accounting database.  */
  64 struct utmpx32 *
  65 getutxent32 (void)
  66 {
  67   struct utmpx *out64;
  68   ALLOCATE_UTMPX32_OUT (out32);
  69
  70   out64 = __getutxent ();
  71   if (!out64)
  72     return NULL;
  73
  74   utmpx_convert64to32 (out64, out32);
  75   return out32;
  76
  77 }
  78 symbol_version (getutxent32, getutxent, GLIBC_2.1);
  79
  80 /* Get the user accounting database entry corresponding to ID.  */
  81 struct utmpx32 *
  82 getutxid32 (const struct utmpx32 *id)
  83 {
  84   ACCESS_UTMPX_ENTRY (__getutxid, id);
  85 }
  86 symbol_version (getutxid32, getutxid, GLIBC_2.1);
  87
  88 /* Get the user accounting database entry corresponding to LINE.  */
  89 struct utmpx32 *
  90 getutxline32 (const struct utmpx32 *line)
  91 {
  92   ACCESS_UTMPX_ENTRY (__getutxline, line);
  93 }
  94 symbol_version (getutxline32, getutxline, GLIBC_2.1);
  95
  96 /* Write the entry UTMPX into the user accounting database.  */
  97 struct utmpx32 *
  98 pututxline32 (const struct utmpx32 *utmpx)
  99 {
 100   ACCESS_UTMPX_ENTRY (__pututxline, utmpx);
 101 }
 102 symbol_version (pututxline32, pututxline, GLIBC_2.1);
 103
 104 /* Append entry UTMP to the wtmpx-like file WTMPX_FILE.  */
 105 void
 106 updwtmpx32 (const char *wtmpx_file, const struct utmpx32 *utmpx)
 107 {
 108   struct utmpx in64;
 109
 110   utmpx_convert32to64 (utmpx, &in64);
 111   __updwtmpx (wtmpx_file, &in64);
 112 }
 113 symbol_version (updwtmpx32, updwtmpx, GLIBC_2.1);
 114
 115 /* Copy the information in UTMPX to UTMP.  */
 116 void
 117 getutmp32 (const struct utmpx32 *utmpx, struct utmp32 *utmp)
 118 {
 119   struct utmpx in64;
 120   struct utmp out64;
 121
 122   utmpx_convert32to64 (utmpx, &in64);
 123   __getutmp (&in64, &out64);
 124   utmp_convert64to32 (&out64, utmp);
 125 }
 126 symbol_version (getutmp32, getutmp, GLIBC_2.1.1);
 127
 128 /* Copy the information in UTMP to UTMPX.  */
 129 void
 130 getutmpx32 (const struct utmp32 *utmp, struct utmpx32 *utmpx)
 131 {
 132   struct utmp in64;
 133   struct utmpx out64;
 134
 135   utmp_convert32to64 (utmp, &in64);
 136   __getutmpx (&in64, &out64);
 137   utmpx_convert64to32 (&out64, utmpx);
 138 }
 139 symbol_version (getutmpx32, getutmpx, GLIBC_2.1.1);