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       1                 :            : /*
       2                 :            :  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
       3                 :            :  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
       4                 :            :  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
       5                 :            :  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
       6                 :            :  * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
       7                 :            :  * All rights reserved.
       8                 :            :  *
       9                 :            :  * Redistribution and use in source and binary forms, with or without
      10                 :            :  * modification, are permitted provided that the following conditions
      11                 :            :  * are met:
      12                 :            :  * 1. Redistributions of source code must retain the above copyright
      13                 :            :  *    notice, this list of conditions and the following disclaimer.
      14                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      15                 :            :  *    notice, this list of conditions and the following disclaimer in the
      16                 :            :  *    documentation and/or other materials provided with the distribution.
      17                 :            :  * 3. The name of the author may not be used to endorse or promote products
      18                 :            :  *    derived from this software without specific prior written permission.
      19                 :            :  *
      20                 :            :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      21                 :            :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      22                 :            :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      23                 :            :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      24                 :            :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      25                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      26                 :            :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      27                 :            :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      28                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      29                 :            :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      30                 :            :  */
      31                 :            : 
      32                 :            : #include "defs.h"
      33                 :            : #include <dirent.h>
      34                 :            : 
      35                 :            : #include "xlat/dirent_types.h"
      36                 :            : 
      37                 :            : #define D_NAME_LEN_MAX 256
      38                 :            : 
      39                 :         36 : SYS_FUNC(getdents64)
      40                 :            : {
      41                 :            :         /* the minimum size of a valid dirent64 structure */
      42                 :         36 :         const unsigned int d_name_offset = offsetof(struct dirent64, d_name);
      43                 :            : 
      44                 :         36 :         unsigned int i, len, dents = 0;
      45                 :            :         char *buf;
      46                 :            : 
      47         [ +  + ]:         36 :         if (entering(tcp)) {
      48                 :         18 :                 printfd(tcp, tcp->u_arg[0]);
      49                 :         18 :                 tprints(", ");
      50                 :         18 :                 return 0;
      51                 :            :         }
      52                 :            : 
      53                 :         18 :         const unsigned int count = tcp->u_arg[2];
      54                 :            : 
      55 [ +  + ][ -  + ]:         18 :         if (syserror(tcp) || !verbose(tcp)) {
      56                 :          6 :                 printaddr(tcp->u_arg[1]);
      57                 :          6 :                 tprintf(", %u", count);
      58                 :          6 :                 return 0;
      59                 :            :         }
      60                 :            : 
      61                 :            :         /* Beware of insanely large or too small values in tcp->u_rval */
      62         [ -  + ]:         12 :         if (tcp->u_rval > 1024*1024)
      63                 :          0 :                 len = 1024*1024;
      64         [ +  + ]:         12 :         else if (tcp->u_rval < (int) d_name_offset)
      65                 :          6 :                 len = 0;
      66                 :            :         else
      67                 :          6 :                 len = tcp->u_rval;
      68                 :            : 
      69         [ +  + ]:         12 :         if (len) {
      70                 :          6 :                 buf = malloc(len);
      71 [ +  - ][ -  + ]:          6 :                 if (!buf || umoven(tcp, tcp->u_arg[1], len, buf) < 0) {
      72                 :          0 :                         printaddr(tcp->u_arg[1]);
      73                 :          0 :                         tprintf(", %u", count);
      74                 :          0 :                         free(buf);
      75                 :          0 :                         return 0;
      76                 :            :                 }
      77                 :            :         } else {
      78                 :          6 :                 buf = NULL;
      79                 :            :         }
      80                 :            : 
      81         [ +  - ]:         12 :         if (!abbrev(tcp))
      82                 :         12 :                 tprints("[");
      83 [ +  + ][ +  + ]:         30 :         for (i = 0; len && i <= len - d_name_offset; ) {
      84                 :         18 :                 struct dirent64 *d = (struct dirent64 *) &buf[i];
      85         [ +  - ]:         18 :                 if (!abbrev(tcp)) {
      86                 :            :                         int d_name_len;
      87         [ +  - ]:         18 :                         if (d->d_reclen >= d_name_offset
      88         [ +  - ]:         18 :                             && i + d->d_reclen <= len) {
      89                 :         18 :                                 d_name_len = d->d_reclen - d_name_offset;
      90                 :            :                         } else {
      91                 :          0 :                                 d_name_len = len - i - d_name_offset;
      92                 :            :                         }
      93         [ +  + ]:         18 :                         if (d_name_len > D_NAME_LEN_MAX)
      94                 :          6 :                                 d_name_len = D_NAME_LEN_MAX;
      95                 :            : 
      96         [ +  + ]:         18 :                         tprintf("%s{d_ino=%" PRIu64 ", d_off=%" PRId64
      97                 :            :                                 ", d_reclen=%u, d_type=",
      98                 :            :                                 i ? ", " : "",
      99                 :            :                                 d->d_ino,
     100                 :            :                                 d->d_off,
     101                 :         18 :                                 d->d_reclen);
     102                 :         18 :                         printxval(dirent_types, d->d_type, "DT_???");
     103                 :            : 
     104                 :         18 :                         tprints(", d_name=");
     105         [ -  + ]:         18 :                         if (print_quoted_string(d->d_name, d_name_len,
     106                 :            :                                                 QUOTE_0_TERMINATED) > 0) {
     107                 :          0 :                                 tprints("...");
     108                 :            :                         }
     109                 :            : 
     110                 :         18 :                         tprints("}");
     111                 :            :                 }
     112         [ -  + ]:         18 :                 if (d->d_reclen < d_name_offset) {
     113                 :          0 :                         tprints("/* d_reclen < offsetof(struct dirent64, d_name) */");
     114                 :          0 :                         break;
     115                 :            :                 }
     116                 :         18 :                 i += d->d_reclen;
     117                 :         18 :                 dents++;
     118                 :            :         }
     119         [ +  - ]:         12 :         if (!abbrev(tcp))
     120                 :         12 :                 tprints("]");
     121                 :            :         else
     122                 :          0 :                 tprintf("/* %u entries */", dents);
     123                 :         12 :         tprintf(", %u", count);
     124                 :         12 :         free(buf);
     125                 :         12 :         return 0;
     126                 :            : }