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) 1999-2018 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/fdflags.h" 39 #include "xlat/lockfcmds.h" 40 #include "xlat/notifyflags.h" 41 42 static void print_struct_flock64(const struct_kernel_flock64 * fl,const int getlk)43 print_struct_flock64(const struct_kernel_flock64 *fl, const int getlk) 44 { 45 tprints("{l_type="); 46 printxval(lockfcmds, (unsigned short) fl->l_type, "F_???"); 47 tprints(", l_whence="); 48 printxval(whence_codes, (unsigned short) fl->l_whence, "SEEK_???"); 49 tprintf(", l_start=%" PRId64 ", l_len=%" PRId64, 50 (int64_t) fl->l_start, (int64_t) fl->l_len); 51 if (getlk) 52 tprintf(", l_pid=%lu", (unsigned long) fl->l_pid); 53 tprints("}"); 54 } 55 56 static void printflock64(struct tcb * const tcp,const kernel_ulong_t addr,const int getlk)57 printflock64(struct tcb *const tcp, const kernel_ulong_t addr, const int getlk) 58 { 59 struct_kernel_flock64 fl; 60 61 if (fetch_struct_flock64(tcp, addr, &fl)) 62 print_struct_flock64(&fl, getlk); 63 } 64 65 static void printflock(struct tcb * const tcp,const kernel_ulong_t addr,const int getlk)66 printflock(struct tcb *const tcp, const kernel_ulong_t addr, const int getlk) 67 { 68 struct_kernel_flock64 fl; 69 70 if (fetch_struct_flock(tcp, addr, &fl)) 71 print_struct_flock64(&fl, getlk); 72 } 73 74 static void print_f_owner_ex(struct tcb * const tcp,const kernel_ulong_t addr)75 print_f_owner_ex(struct tcb *const tcp, const kernel_ulong_t addr) 76 { 77 struct { int type, pid; } owner; 78 79 if (umove_or_printaddr(tcp, addr, &owner)) 80 return; 81 82 tprints("{type="); 83 printxval(f_owner_types, owner.type, "F_OWNER_???"); 84 tprintf(", pid=%d}", owner.pid); 85 } 86 87 static int print_fcntl(struct tcb * tcp)88 print_fcntl(struct tcb *tcp) 89 { 90 const unsigned int cmd = tcp->u_arg[1]; 91 92 switch (cmd) { 93 case F_SETFD: 94 tprints(", "); 95 printflags(fdflags, tcp->u_arg[2], "FD_???"); 96 break; 97 case F_SETOWN: 98 case F_SETPIPE_SZ: 99 tprintf(", %" PRI_kld, tcp->u_arg[2]); 100 break; 101 case F_DUPFD: 102 case F_DUPFD_CLOEXEC: 103 tprintf(", %" PRI_kld, tcp->u_arg[2]); 104 return RVAL_DECODED | RVAL_FD; 105 case F_SETFL: 106 tprints(", "); 107 tprint_open_modes(tcp->u_arg[2]); 108 break; 109 case F_SETLK: 110 case F_SETLKW: 111 tprints(", "); 112 printflock(tcp, tcp->u_arg[2], 0); 113 break; 114 case F_OFD_SETLK: 115 case F_OFD_SETLKW: 116 tprints(", "); 117 printflock64(tcp, tcp->u_arg[2], 0); 118 break; 119 case F_SETOWN_EX: 120 tprints(", "); 121 print_f_owner_ex(tcp, tcp->u_arg[2]); 122 break; 123 case F_NOTIFY: 124 tprints(", "); 125 printflags64(notifyflags, tcp->u_arg[2], "DN_???"); 126 break; 127 case F_SETLEASE: 128 tprints(", "); 129 printxval64(lockfcmds, tcp->u_arg[2], "F_???"); 130 break; 131 case F_ADD_SEALS: 132 tprints(", "); 133 printflags64(f_seals, tcp->u_arg[2], "F_SEAL_???"); 134 break; 135 case F_SETSIG: 136 tprints(", "); 137 tprints(signame(tcp->u_arg[2])); 138 break; 139 case F_GETOWN: 140 case F_GETPIPE_SZ: 141 break; 142 case F_GETFD: 143 if (entering(tcp) || syserror(tcp) || tcp->u_rval == 0) 144 return 0; 145 tcp->auxstr = sprintflags("flags ", fdflags, 146 (kernel_ulong_t) tcp->u_rval); 147 return RVAL_HEX | RVAL_STR; 148 case F_GETFL: 149 if (entering(tcp) || syserror(tcp)) 150 return 0; 151 tcp->auxstr = sprint_open_modes(tcp->u_rval); 152 return RVAL_HEX | RVAL_STR; 153 case F_GETLK: 154 if (entering(tcp)) 155 return 0; 156 tprints(", "); 157 printflock(tcp, tcp->u_arg[2], 1); 158 break; 159 case F_OFD_GETLK: 160 if (entering(tcp)) 161 return 0; 162 tprints(", "); 163 printflock64(tcp, tcp->u_arg[2], 1); 164 break; 165 case F_GETOWN_EX: 166 if (entering(tcp)) 167 return 0; 168 tprints(", "); 169 print_f_owner_ex(tcp, tcp->u_arg[2]); 170 break; 171 case F_GETLEASE: 172 if (entering(tcp) || syserror(tcp)) 173 return 0; 174 tcp->auxstr = xlookup(lockfcmds, (kernel_ulong_t) tcp->u_rval); 175 return RVAL_HEX | RVAL_STR; 176 case F_GET_SEALS: 177 if (entering(tcp) || syserror(tcp) || tcp->u_rval == 0) 178 return 0; 179 tcp->auxstr = sprintflags("seals ", f_seals, 180 (kernel_ulong_t) tcp->u_rval); 181 return RVAL_HEX | RVAL_STR; 182 case F_GETSIG: 183 if (entering(tcp) || syserror(tcp) || tcp->u_rval == 0) 184 return 0; 185 tcp->auxstr = signame(tcp->u_rval); 186 return RVAL_STR; 187 default: 188 tprintf(", %#" PRI_klx, tcp->u_arg[2]); 189 break; 190 } 191 return RVAL_DECODED; 192 } 193 SYS_FUNC(fcntl)194 SYS_FUNC(fcntl) 195 { 196 if (entering(tcp)) { 197 printfd(tcp, tcp->u_arg[0]); 198 tprints(", "); 199 printxval(fcntlcmds, tcp->u_arg[1], "F_???"); 200 } 201 return print_fcntl(tcp); 202 } 203 SYS_FUNC(fcntl64)204 SYS_FUNC(fcntl64) 205 { 206 const unsigned int cmd = tcp->u_arg[1]; 207 if (entering(tcp)) { 208 printfd(tcp, tcp->u_arg[0]); 209 tprints(", "); 210 printxval(fcntlcmds, cmd, "F_???"); 211 } 212 switch (cmd) { 213 case F_SETLK64: 214 case F_SETLKW64: 215 tprints(", "); 216 printflock64(tcp, tcp->u_arg[2], 0); 217 return RVAL_DECODED; 218 case F_GETLK64: 219 if (exiting(tcp)) { 220 tprints(", "); 221 printflock64(tcp, tcp->u_arg[2], 1); 222 } 223 return 0; 224 } 225 return print_fcntl(tcp); 226 } 227