granicus.if.org Git - strace/blob - syslog.c

   1 /*
   2  * Copyright (c) 2012-2015 Dmitry V. Levin <ldv@altlinux.org>
   3  * Copyright (c) 2014-2018 The strace developers.
   4  * All rights reserved.
   5  *
   6  * SPDX-License-Identifier: LGPL-2.1-or-later
   7  */
   8
   9 #include "defs.h"
  10
  11 #include "xlat/syslog_action_type.h"
  12 #include "xlat/syslog_console_levels.h"
  13
  14 SYS_FUNC(syslog)
  15 {
  16         int type = tcp->u_arg[0];
  17         int len = tcp->u_arg[2];
  18
  19         if (entering(tcp)) {
  20                 /* type */
  21                 printxval_ex(syslog_action_type, type, "SYSLOG_ACTION_???",
  22                              XLAT_STYLE_VERBOSE | XLAT_STYLE_FMT_D);
  23         }
  24
  25         switch (type) {
  26         /* Those commands have bufp and len ignored */
  27         case SYSLOG_ACTION_CLOSE:
  28         case SYSLOG_ACTION_OPEN:
  29         case SYSLOG_ACTION_CLEAR:
  30         case SYSLOG_ACTION_CONSOLE_OFF:
  31         case SYSLOG_ACTION_CONSOLE_ON:
  32         case SYSLOG_ACTION_SIZE_UNREAD:
  33         case SYSLOG_ACTION_SIZE_BUFFER:
  34                 return RVAL_DECODED;
  35
  36         case SYSLOG_ACTION_READ:
  37         case SYSLOG_ACTION_READ_ALL:
  38         case SYSLOG_ACTION_READ_CLEAR:
  39                 if (entering(tcp)) {
  40                         tprints(", ");
  41                         return 0;
  42                 }
  43                 break;
  44
  45         case SYSLOG_ACTION_CONSOLE_LEVEL: /* Uses len */
  46                 tprints(", ");
  47                 printaddr64(tcp->u_arg[1]);
  48                 tprints(", ");
  49                 printxval_ex(syslog_console_levels, len, "LOGLEVEL_???",
  50                              XLAT_STYLE_VERBOSE | XLAT_STYLE_FMT_D);
  51                 return RVAL_DECODED;
  52
  53         default:
  54                 tprints(", ");
  55                 printaddr64(tcp->u_arg[1]);
  56                 tprintf(", %d", len);
  57                 return RVAL_DECODED;
  58         }
  59
  60         /* syscall exit handler for SYSLOG_ACTION_READ* */
  61
  62         /* bufp */
  63         if (syserror(tcp))
  64                 printaddr64(tcp->u_arg[1]);
  65         else
  66                 printstrn(tcp, tcp->u_arg[1], tcp->u_rval);
  67         /* len */
  68         tprintf(", %d", len);
  69
  70         return 0;
  71 }