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) 1993-1996 Rick Sladkey <jrs (at) world.std.com> 5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert (at) cistron.nl> 6 * Copyright (c) 2003-2015 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 #ifdef STRACE_UID_SIZE 33 # if STRACE_UID_SIZE != 16 34 # error invalid STRACE_UID_SIZE 35 # endif 36 37 # define SIZEIFY(x) SIZEIFY_(x,STRACE_UID_SIZE) 38 # define SIZEIFY_(x,size) SIZEIFY__(x,size) 39 # define SIZEIFY__(x,size) x ## size 40 41 # define printuid SIZEIFY(printuid) 42 # define sys_chown SIZEIFY(sys_chown) 43 # define sys_fchown SIZEIFY(sys_fchown) 44 # define sys_getgroups SIZEIFY(sys_getgroups) 45 # define sys_getresuid SIZEIFY(sys_getresuid) 46 # define sys_getuid SIZEIFY(sys_getuid) 47 # define sys_setfsuid SIZEIFY(sys_setfsuid) 48 # define sys_setgroups SIZEIFY(sys_setgroups) 49 # define sys_setresuid SIZEIFY(sys_setresuid) 50 # define sys_setreuid SIZEIFY(sys_setreuid) 51 # define sys_setuid SIZEIFY(sys_setuid) 52 #endif /* STRACE_UID_SIZE */ 53 54 #include "defs.h" 55 56 #ifdef STRACE_UID_SIZE 57 # if !NEED_UID16_PARSERS 58 # undef STRACE_UID_SIZE 59 # endif 60 #else 61 # define STRACE_UID_SIZE 32 62 #endif 63 64 #ifdef STRACE_UID_SIZE 65 66 # undef uid_t 67 # define uid_t uid_t_(STRACE_UID_SIZE) 68 # define uid_t_(size) uid_t__(size) 69 # define uid_t__(size) uint ## size ## _t 70 71 SYS_FUNC(getuid) 72 { 73 return RVAL_UDECIMAL | RVAL_DECODED; 74 } 75 76 SYS_FUNC(setfsuid) 77 { 78 if (entering(tcp)) 79 tprintf("%u", (uid_t) tcp->u_arg[0]); 80 81 return RVAL_UDECIMAL | RVAL_DECODED; 82 } 83 84 SYS_FUNC(setuid) 85 { 86 printuid("", tcp->u_arg[0]); 87 88 return RVAL_DECODED; 89 } 90 91 static void 92 get_print_uid(struct tcb *tcp, const char *prefix, const long addr) 93 { 94 uid_t uid; 95 96 tprints(prefix); 97 if (!umove_or_printaddr(tcp, addr, &uid)) 98 tprintf("[%u]", uid); 99 } 100 101 SYS_FUNC(getresuid) 102 { 103 if (entering(tcp)) 104 return 0; 105 106 get_print_uid(tcp, "", tcp->u_arg[0]); 107 get_print_uid(tcp, ", ", tcp->u_arg[1]); 108 get_print_uid(tcp, ", ", tcp->u_arg[2]); 109 110 return 0; 111 } 112 113 SYS_FUNC(setreuid) 114 { 115 printuid("", tcp->u_arg[0]); 116 printuid(", ", tcp->u_arg[1]); 117 118 return RVAL_DECODED; 119 } 120 121 SYS_FUNC(setresuid) 122 { 123 printuid("", tcp->u_arg[0]); 124 printuid(", ", tcp->u_arg[1]); 125 printuid(", ", tcp->u_arg[2]); 126 127 return RVAL_DECODED; 128 } 129 130 SYS_FUNC(chown) 131 { 132 printpath(tcp, tcp->u_arg[0]); 133 printuid(", ", tcp->u_arg[1]); 134 printuid(", ", tcp->u_arg[2]); 135 136 return RVAL_DECODED; 137 } 138 139 SYS_FUNC(fchown) 140 { 141 printfd(tcp, tcp->u_arg[0]); 142 printuid(", ", tcp->u_arg[1]); 143 printuid(", ", tcp->u_arg[2]); 144 145 return RVAL_DECODED; 146 } 147 148 void 149 printuid(const char *text, const unsigned int uid) 150 { 151 if ((unsigned int) -1 == uid || (uid_t) -1 == uid) 152 tprintf("%s-1", text); 153 else 154 tprintf("%s%u", text, uid); 155 } 156 157 SYS_FUNC(setgroups) 158 { 159 unsigned long cur, abbrev_end; 160 uid_t gid; 161 int failed = 0; 162 const unsigned long len = tcp->u_arg[0]; 163 const unsigned long start = tcp->u_arg[1]; 164 const unsigned long size = len * sizeof(gid); 165 const unsigned long end = start + size; 166 167 tprintf("%lu, ", len); 168 if (len == 0) { 169 tprints("[]"); 170 return RVAL_DECODED; 171 } 172 if (!start || !verbose(tcp) || 173 size / sizeof(gid) != len || end < start) { 174 printaddr(start); 175 return RVAL_DECODED; 176 } 177 if (abbrev(tcp)) { 178 abbrev_end = start + max_strlen * sizeof(gid); 179 if (abbrev_end < start) 180 abbrev_end = end; 181 } else { 182 abbrev_end = end; 183 } 184 tprints("["); 185 for (cur = start; cur < end; cur += sizeof(gid)) { 186 if (cur > start) 187 tprints(", "); 188 if (cur >= abbrev_end) { 189 tprints("..."); 190 break; 191 } 192 if (umoven(tcp, cur, sizeof(gid), &gid) < 0) { 193 tprints("?"); 194 failed = 1; 195 break; 196 } 197 tprintf("%u", (unsigned int) gid); 198 } 199 tprints("]"); 200 if (failed) { 201 tprints(" "); 202 printaddr(start); 203 } 204 205 return RVAL_DECODED; 206 } 207 208 SYS_FUNC(getgroups) 209 { 210 if (entering(tcp)) { 211 tprintf("%lu, ", tcp->u_arg[0]); 212 } else { 213 unsigned long cur, abbrev_end; 214 uid_t gid; 215 int failed = 0; 216 const unsigned long len = tcp->u_rval; 217 const unsigned long size = len * sizeof(gid); 218 const unsigned long start = tcp->u_arg[1]; 219 const unsigned long end = start + size; 220 221 if (!start) { 222 printaddr(start); 223 return 0; 224 } 225 if (len == 0) { 226 tprints("[]"); 227 return 0; 228 } 229 if (!verbose(tcp) || syserror(tcp) || 230 size / sizeof(gid) != len || end < start) { 231 printaddr(start); 232 return 0; 233 } 234 if (abbrev(tcp)) { 235 abbrev_end = start + max_strlen * sizeof(gid); 236 if (abbrev_end < start) 237 abbrev_end = end; 238 } else { 239 abbrev_end = end; 240 } 241 tprints("["); 242 for (cur = start; cur < end; cur += sizeof(gid)) { 243 if (cur > start) 244 tprints(", "); 245 if (cur >= abbrev_end) { 246 tprints("..."); 247 break; 248 } 249 if (umoven(tcp, cur, sizeof(gid), &gid) < 0) { 250 tprints("?"); 251 failed = 1; 252 break; 253 } 254 tprintf("%u", (unsigned int) gid); 255 } 256 tprints("]"); 257 if (failed) { 258 tprints(" "); 259 printaddr(start); 260 } 261 } 262 return 0; 263 } 264 265 #endif /* STRACE_UID_SIZE */ 266
