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) 2003-2016 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 printuid("", tcp->u_arg[0]); 79 80 return RVAL_UDECIMAL | RVAL_DECODED; 81 } 82 83 SYS_FUNC(setuid) 84 { 85 printuid("", tcp->u_arg[0]); 86 87 return RVAL_DECODED; 88 } 89 90 static void 91 get_print_uid(struct tcb *const tcp, const char *const prefix, 92 const kernel_ulong_t addr) 93 { 94 uid_t uid; 95 96 tprints(prefix); 97 if (!umove_or_printaddr(tcp, addr, &uid)) { 98 printuid("[", uid); 99 tprints("]"); 100 } 101 } 102 103 SYS_FUNC(getresuid) 104 { 105 if (entering(tcp)) 106 return 0; 107 108 get_print_uid(tcp, "", tcp->u_arg[0]); 109 get_print_uid(tcp, ", ", tcp->u_arg[1]); 110 get_print_uid(tcp, ", ", tcp->u_arg[2]); 111 112 return 0; 113 } 114 115 SYS_FUNC(setreuid) 116 { 117 printuid("", tcp->u_arg[0]); 118 printuid(", ", tcp->u_arg[1]); 119 120 return RVAL_DECODED; 121 } 122 123 SYS_FUNC(setresuid) 124 { 125 printuid("", tcp->u_arg[0]); 126 printuid(", ", tcp->u_arg[1]); 127 printuid(", ", tcp->u_arg[2]); 128 129 return RVAL_DECODED; 130 } 131 132 SYS_FUNC(chown) 133 { 134 printpath(tcp, tcp->u_arg[0]); 135 printuid(", ", tcp->u_arg[1]); 136 printuid(", ", tcp->u_arg[2]); 137 138 return RVAL_DECODED; 139 } 140 141 SYS_FUNC(fchown) 142 { 143 printfd(tcp, tcp->u_arg[0]); 144 printuid(", ", tcp->u_arg[1]); 145 printuid(", ", tcp->u_arg[2]); 146 147 return RVAL_DECODED; 148 } 149 150 void 151 printuid(const char *text, const unsigned int uid) 152 { 153 if ((uid_t) -1U == (uid_t) uid) 154 tprintf("%s-1", text); 155 else 156 tprintf("%s%u", text, (uid_t) uid); 157 } 158 159 static bool 160 print_gid(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data) 161 { 162 printuid("", (*(uid_t *) elem_buf)); 163 164 return true; 165 } 166 167 static void 168 print_groups(struct tcb *const tcp, const unsigned int len, 169 const kernel_ulong_t addr) 170 { 171 static unsigned long ngroups_max; 172 if (!ngroups_max) 173 ngroups_max = sysconf(_SC_NGROUPS_MAX); 174 175 if (len > ngroups_max) { 176 printaddr(addr); 177 return; 178 } 179 180 uid_t gid; 181 print_array(tcp, addr, len, &gid, sizeof(gid), 182 umoven_or_printaddr, print_gid, 0); 183 } 184 185 SYS_FUNC(setgroups) 186 { 187 const int len = tcp->u_arg[0]; 188 189 tprintf("%d, ", len); 190 print_groups(tcp, len, tcp->u_arg[1]); 191 return RVAL_DECODED; 192 } 193 194 SYS_FUNC(getgroups) 195 { 196 if (entering(tcp)) 197 tprintf("%d, ", (int) tcp->u_arg[0]); 198 else 199 print_groups(tcp, tcp->u_rval, tcp->u_arg[1]); 200 return 0; 201 } 202 203 #endif /* STRACE_UID_SIZE */ 204
