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) 1999-2017 The strace developers. 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 "flock.h" 34 35 #include "xlat/f_owner_types.h" 36 #include "xlat/f_seals.h" 37 #include "xlat/fcntlcmds.h" 38 #include "xlat/fcntl64cmds.h" 39 #include "xlat/fdflags.h" 40 #include "xlat/lockfcmds.h" 41 #include "xlat/notifyflags.h" 42 43 static void 44 print_struct_flock64(const struct_kernel_flock64 *fl, const int getlk) 45 { 46 tprints("{l_type="); 47 printxval(lockfcmds, (unsigned short) fl->l_type, "F_???"); 48 tprints(", l_whence="); 49 printxval(whence_codes, (unsigned short) fl->l_whence, "SEEK_???"); 50 tprintf(", l_start=%" PRId64 ", l_len=%" PRId64, 51 (int64_t) fl->l_start, (int64_t) fl->l_len); 52 if (getlk) 53 tprintf(", l_pid=%lu", (unsigned long) fl->l_pid); 54 tprints("}"); 55 } 56 57 static void 58 printflock64(struct tcb *const tcp, const kernel_ulong_t addr, const int getlk) 59 { 60 struct_kernel_flock64 fl; 61 62 if (fetch_struct_flock64(tcp, addr, &fl)) 63 print_struct_flock64(&fl, getlk); 64 } 65 66 static void 67 printflock(struct tcb *const tcp, const kernel_ulong_t addr, const int getlk) 68 { 69 struct_kernel_flock64 fl; 70 71 if (fetch_struct_flock(tcp, addr, &fl)) 72 print_struct_flock64(&fl, getlk); 73 } 74 75 static void 76 print_f_owner_ex(struct tcb *const tcp, const kernel_ulong_t addr) 77 { 78 struct { int type, pid; } owner; 79 80 if (umove_or_printaddr(tcp, addr, &owner)) 81 return; 82 83 tprints("{type="); 84 printxval(f_owner_types, owner.type, "F_OWNER_???"); 85 tprintf(", pid=%d}", owner.pid); 86 } 87 88 static int 89 print_fcntl(struct tcb *tcp) 90 { 91 const unsigned int cmd = tcp->u_arg[1]; 92 93 switch (cmd) { 94 case F_SETFD: 95 tprints(", "); 96 printflags(fdflags, tcp->u_arg[2], "FD_???"); 97 break; 98 case F_SETOWN: 99 case F_SETPIPE_SZ: 100 tprintf(", %" PRI_kld, tcp->u_arg[2]); 101 break; 102 case F_DUPFD: 103 case F_DUPFD_CLOEXEC: 104 tprintf(", %" PRI_kld, tcp->u_arg[2]); 105 return RVAL_DECODED | RVAL_FD; 106 case F_SETFL: 107 tprints(", "); 108 tprint_open_modes(tcp->u_arg[2]); 109 break; 110 case F_SETLK: 111 case F_SETLKW: 112 tprints(", "); 113 printflock(tcp, tcp->u_arg[2], 0); 114 break; 115 case F_OFD_SETLK: 116 case F_OFD_SETLKW: 117 tprints(", "); 118 printflock64(tcp, tcp->u_arg[2], 0); 119 break; 120 case F_SETOWN_EX: 121 tprints(", "); 122 print_f_owner_ex(tcp, tcp->u_arg[2]); 123 break; 124 case F_NOTIFY: 125 tprints(", "); 126 printflags64(notifyflags, tcp->u_arg[2], "DN_???"); 127 break; 128 case F_SETLEASE: 129 tprints(", "); 130 printxval64(lockfcmds, tcp->u_arg[2], "F_???"); 131 break; 132 case F_ADD_SEALS: 133 tprints(", "); 134 printflags64(f_seals, tcp->u_arg[2], "F_SEAL_???"); 135 break; 136 case F_SETSIG: 137 tprints(", "); 138 tprints(signame(tcp->u_arg[2])); 139 break; 140 case F_GETOWN: 141 case F_GETPIPE_SZ: 142 break; 143 case F_GETFD: 144 if (entering(tcp) || syserror(tcp) || tcp->u_rval == 0) 145 return 0; 146 tcp->auxstr = sprintflags("flags ", fdflags, 147 (kernel_ulong_t) tcp->u_rval); 148 return RVAL_HEX | RVAL_STR; 149 case F_GETFL: 150 if (entering(tcp) || syserror(tcp)) 151 return 0; 152 tcp->auxstr = sprint_open_modes(tcp->u_rval); 153 return RVAL_HEX | RVAL_STR; 154 case F_GETLK: 155 if (entering(tcp)) 156 return 0; 157 tprints(", "); 158 printflock(tcp, tcp->u_arg[2], 1); 159 break; 160 case F_OFD_GETLK: 161 if (entering(tcp)) 162 return 0; 163 tprints(", "); 164 printflock64(tcp, tcp->u_arg[2], 1); 165 break; 166 case F_GETOWN_EX: 167 if (entering(tcp)) 168 return 0; 169 tprints(", "); 170 print_f_owner_ex(tcp, tcp->u_arg[2]); 171 break; 172 case F_GETLEASE: 173 if (entering(tcp) || syserror(tcp)) 174 return 0; 175 tcp->auxstr = xlookup(lockfcmds, (kernel_ulong_t) tcp->u_rval); 176 return RVAL_HEX | RVAL_STR; 177 case F_GET_SEALS: 178 if (entering(tcp) || syserror(tcp) || tcp->u_rval == 0) 179 return 0; 180 tcp->auxstr = sprintflags("seals ", f_seals, 181 (kernel_ulong_t) tcp->u_rval); 182 return RVAL_HEX | RVAL_STR; 183 case F_GETSIG: 184 if (entering(tcp) || syserror(tcp) || tcp->u_rval == 0) 185 return 0; 186 tcp->auxstr = signame(tcp->u_rval); 187 return RVAL_STR; 188 default: 189 tprintf(", %#" PRI_klx, tcp->u_arg[2]); 190 break; 191 } 192 return RVAL_DECODED; 193 } 194 195 SYS_FUNC(fcntl) 196 { 197 if (entering(tcp)) { 198 printfd(tcp, tcp->u_arg[0]); 199 tprints(", "); 200 const unsigned int cmd = tcp->u_arg[1]; 201 const char *str = xlookup(fcntlcmds, cmd); 202 if (str) { 203 tprints(str); 204 } else { 205 /* 206 * fcntl syscall does not recognize these 207 * constants, but we would like to show them 208 * for better debugging experience. 209 */ 210 printxval(fcntl64cmds, cmd, "F_???"); 211 } 212 } 213 return print_fcntl(tcp); 214 } 215 216 SYS_FUNC(fcntl64) 217 { 218 const unsigned int cmd = tcp->u_arg[1]; 219 if (entering(tcp)) { 220 printfd(tcp, tcp->u_arg[0]); 221 tprints(", "); 222 const char *str = xlookup(fcntl64cmds, cmd); 223 if (str) { 224 tprints(str); 225 } else { 226 printxval(fcntlcmds, cmd, "F_???"); 227 } 228 } 229 switch (cmd) { 230 case F_SETLK64: 231 case F_SETLKW64: 232 tprints(", "); 233 printflock64(tcp, tcp->u_arg[2], 0); 234 return RVAL_DECODED; 235 case F_GETLK64: 236 if (exiting(tcp)) { 237 tprints(", "); 238 printflock64(tcp, tcp->u_arg[2], 1); 239 } 240 return 0; 241 } 242 return print_fcntl(tcp); 243 } 244
