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 34#include DEF_MPERS_TYPE(kernel_dirent) 35 36#include "kernel_types.h" 37 38#include MPERS_DEFS 39 40#define D_NAME_LEN_MAX 256 41 42static void 43print_old_dirent(struct tcb *tcp, long addr) 44{ 45 kernel_dirent d; 46 47 if (umove_or_printaddr(tcp, addr, &d)) 48 return; 49 50 tprintf("{d_ino=%llu, d_off=%llu, d_reclen=%u, d_name=", 51 (unsigned long long) d.d_ino, 52 (unsigned long long) d.d_off, d.d_reclen); 53 if (d.d_reclen > D_NAME_LEN_MAX) 54 d.d_reclen = D_NAME_LEN_MAX; 55 printpathn(tcp, addr + offsetof(kernel_dirent, d_name), d.d_reclen); 56 tprints("}"); 57} 58 59SYS_FUNC(readdir) 60{ 61 if (entering(tcp)) { 62 printfd(tcp, tcp->u_arg[0]); 63 tprints(", "); 64 } else { 65 if (tcp->u_rval == 0) 66 printaddr(tcp->u_arg[1]); 67 else 68 print_old_dirent(tcp, tcp->u_arg[1]); 69 /* Not much point in printing this out, it is always 1. */ 70 if (tcp->u_arg[2] != 1) 71 tprintf(", %lu", tcp->u_arg[2]); 72 } 73 return 0; 74} 75 76SYS_FUNC(getdents) 77{ 78 unsigned int i, len, dents = 0; 79 char *buf; 80 81 if (entering(tcp)) { 82 printfd(tcp, tcp->u_arg[0]); 83 tprints(", "); 84 return 0; 85 } 86 if (syserror(tcp) || !verbose(tcp)) { 87 printaddr(tcp->u_arg[1]); 88 tprintf(", %lu", tcp->u_arg[2]); 89 return 0; 90 } 91 92 /* Beware of insanely large or too small values in tcp->u_rval */ 93 if (tcp->u_rval > 1024*1024) 94 len = 1024*1024; 95 else if (tcp->u_rval < (int) sizeof(kernel_dirent)) 96 len = 0; 97 else 98 len = tcp->u_rval; 99 100 if (len) { 101 buf = malloc(len); 102 if (!buf || umoven(tcp, tcp->u_arg[1], len, buf) < 0) { 103 printaddr(tcp->u_arg[1]); 104 tprintf(", %lu", tcp->u_arg[2]); 105 free(buf); 106 return 0; 107 } 108 } else { 109 buf = NULL; 110 } 111 112 if (!abbrev(tcp)) 113 tprints("["); 114 for (i = 0; len && i <= len - sizeof(kernel_dirent); ) { 115 kernel_dirent *d = (kernel_dirent *) &buf[i]; 116 117 if (!abbrev(tcp)) { 118 int oob = d->d_reclen < sizeof(kernel_dirent) || 119 i + d->d_reclen - 1 >= len; 120 int d_name_len = oob ? len - i : d->d_reclen; 121 d_name_len -= offsetof(kernel_dirent, d_name) + 1; 122 if (d_name_len > D_NAME_LEN_MAX) 123 d_name_len = D_NAME_LEN_MAX; 124 125 tprintf("%s{d_ino=%llu, d_off=%llu, d_reclen=%u" 126 ", d_name=", i ? ", " : "", 127 (unsigned long long) d->d_ino, 128 (unsigned long long) d->d_off, d->d_reclen); 129 130 if (print_quoted_string(d->d_name, d_name_len, 131 QUOTE_0_TERMINATED) > 0) { 132 tprints("..."); 133 } 134 135 tprints(", d_type="); 136 if (oob) 137 tprints("?"); 138 else 139 printxval(dirent_types, buf[i + d->d_reclen - 1], "DT_???"); 140 tprints("}"); 141 } 142 dents++; 143 if (d->d_reclen < sizeof(kernel_dirent)) { 144 tprints("/* d_reclen < sizeof(struct dirent) */"); 145 break; 146 } 147 i += d->d_reclen; 148 } 149 if (!abbrev(tcp)) 150 tprints("]"); 151 else 152 tprintf("/* %u entries */", dents); 153 tprintf(", %lu", tcp->u_arg[2]); 154 free(buf); 155 return 0; 156} 157