1 /* 2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk (at) cs.few.eur.nl> 3 * Copyright (c) 1993 Branko Lankester <branko (at) hacktic.nl> 4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs (at) world.std.com> 5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert (at) cistron.nl> 6 * Copyright (c) 2005-2015 Dmitry V. Levin <ldv (at) 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 MPERS_DEFS 37 38 #define D_NAME_LEN_MAX 256 39 40 static void 41 print_old_dirent(struct tcb *const tcp, const kernel_ulong_t addr) 42 { 43 kernel_dirent d; 44 45 if (umove_or_printaddr(tcp, addr, &d)) 46 return; 47 48 tprintf("{d_ino=%llu, d_off=%llu, d_reclen=%u, d_name=", 49 zero_extend_signed_to_ull(d.d_ino), 50 zero_extend_signed_to_ull(d.d_off), d.d_reclen); 51 if (d.d_reclen > D_NAME_LEN_MAX) 52 d.d_reclen = D_NAME_LEN_MAX; 53 printpathn(tcp, addr + offsetof(kernel_dirent, d_name), d.d_reclen); 54 tprints("}"); 55 } 56 57 SYS_FUNC(readdir) 58 { 59 if (entering(tcp)) { 60 printfd(tcp, tcp->u_arg[0]); 61 tprints(", "); 62 } else { 63 if (tcp->u_rval == 0) 64 printaddr(tcp->u_arg[1]); 65 else 66 print_old_dirent(tcp, tcp->u_arg[1]); 67 /* Not much point in printing this out, it is always 1. */ 68 if (tcp->u_arg[2] != 1) 69 tprintf(", %" PRI_klu, tcp->u_arg[2]); 70 } 71 return 0; 72 } 73 74 SYS_FUNC(getdents) 75 { 76 unsigned int i, len, dents = 0; 77 unsigned char *buf; 78 79 if (entering(tcp)) { 80 printfd(tcp, tcp->u_arg[0]); 81 tprints(", "); 82 return 0; 83 } 84 85 const unsigned int count = tcp->u_arg[2]; 86 87 if (syserror(tcp) || !verbose(tcp)) { 88 printaddr(tcp->u_arg[1]); 89 tprintf(", %u", count); 90 return 0; 91 } 92 93 /* Beware of insanely large or too small values in tcp->u_rval */ 94 if (tcp->u_rval > 1024*1024) 95 len = 1024*1024; 96 else if (tcp->u_rval < (int) sizeof(kernel_dirent)) 97 len = 0; 98 else 99 len = tcp->u_rval; 100 101 if (len) { 102 buf = malloc(len); 103 if (!buf || umoven(tcp, tcp->u_arg[1], len, buf) < 0) { 104 printaddr(tcp->u_arg[1]); 105 tprintf(", %u", count); 106 free(buf); 107 return 0; 108 } 109 } else { 110 buf = NULL; 111 } 112 113 if (!abbrev(tcp)) 114 tprints("["); 115 for (i = 0; len && i <= len - sizeof(kernel_dirent); ) { 116 kernel_dirent *d = (kernel_dirent *) &buf[i]; 117 118 if (!abbrev(tcp)) { 119 int oob = d->d_reclen < sizeof(kernel_dirent) || 120 i + d->d_reclen - 1 >= len; 121 int d_name_len = oob ? len - i : d->d_reclen; 122 d_name_len -= offsetof(kernel_dirent, d_name) + 1; 123 if (d_name_len > D_NAME_LEN_MAX) 124 d_name_len = D_NAME_LEN_MAX; 125 126 tprintf("%s{d_ino=%llu, d_off=%llu, d_reclen=%u" 127 ", d_name=", i ? ", " : "", 128 zero_extend_signed_to_ull(d->d_ino), 129 zero_extend_signed_to_ull(d->d_off), 130 d->d_reclen); 131 132 if (print_quoted_string(d->d_name, d_name_len, 133 QUOTE_0_TERMINATED) > 0) { 134 tprints("..."); 135 } 136 137 tprints(", d_type="); 138 if (oob) 139 tprints("?"); 140 else 141 printxval(dirent_types, buf[i + d->d_reclen - 1], "DT_???"); 142 tprints("}"); 143 } 144 dents++; 145 if (d->d_reclen < sizeof(kernel_dirent)) { 146 tprints("/* d_reclen < sizeof(struct dirent) */"); 147 break; 148 } 149 i += d->d_reclen; 150 } 151 if (!abbrev(tcp)) 152 tprints("]"); 153 else 154 tprintf("/* %u entries */", dents); 155 tprintf(", %u", count); 156 free(buf); 157 return 0; 158 } 159
