18a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards/* 28a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Copyright (c) 2011, Comtrol Corp. 38a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * All rights reserved. 48a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * 58a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Redistribution and use in source and binary forms, with or without 68a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * modification, are permitted provided that the following conditions 78a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * are met: 88a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * 1. Redistributions of source code must retain the above copyright 98a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * notice, this list of conditions and the following disclaimer. 108a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * 2. Redistributions in binary form must reproduce the above copyright 118a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * notice, this list of conditions and the following disclaimer in the 128a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * documentation and/or other materials provided with the distribution. 138a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * 3. The name of the author may not be used to endorse or promote products 148a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * derived from this software without specific prior written permission. 158a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * 168a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 178a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 188a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 198a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 208a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 218a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 228a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 238a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 248a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 258a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 268a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * 278a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 288a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 298a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards#include "defs.h" 30b038a43d756c84f98868557a1bbacd048faf1e53Dmitry V. Levin#include <sys/param.h> 31d64a7e4755abe2d073676741f38328aa0b83db9fDmitry V. Levin#if defined HAVE_POLL_H 32a6d91ded3f2d5401e09a9c2fa442aabfbfe593a8Denys Vlasenko# include <poll.h> 33d64a7e4755abe2d073676741f38328aa0b83db9fDmitry V. Levin#elif defined HAVE_SYS_POLL_H 34a6d91ded3f2d5401e09a9c2fa442aabfbfe593a8Denys Vlasenko# include <sys/poll.h> 358a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards#endif 368a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 378a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards#include "syscall.h" 388a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3938cfe7c92328e940c71074c9b579b5bf9f2cb2f6Denys Vlasenkoconst char **paths_selected = NULL; 407239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenkostatic unsigned num_selected = 0; 418a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 428a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards/* 438a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Return true if specified path matches one that we're tracing. 448a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 458a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardsstatic int 468a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardspathmatch(const char *path) 478a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards{ 487239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko unsigned i; 498a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 507239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko for (i = 0; i < num_selected; ++i) { 5138cfe7c92328e940c71074c9b579b5bf9f2cb2f6Denys Vlasenko if (strcmp(path, paths_selected[i]) == 0) 528a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 1; 538a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 548a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 0; 558a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards} 568a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 578a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards/* 588a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Return true if specified path (in user-space) matches. 598a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 608a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardsstatic int 618a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardsupathmatch(struct tcb *tcp, unsigned long upath) 628a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards{ 637b609d5ba0852e6c56ba311350ebd4412361777bDenys Vlasenko char path[PATH_MAX + 1]; 648a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 651a880cf3bd8c12af6d831c2dfa5b259be074d77aDmitry V. Levin return umovestr(tcp, upath, sizeof path, path) > 0 && 668a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards pathmatch(path); 678a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards} 688a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 698a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards/* 708a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Return true if specified fd maps to a path we're tracing. 718a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 728a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardsstatic int 738a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardsfdmatch(struct tcb *tcp, int fd) 748a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards{ 7561ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko char path[PATH_MAX + 1]; 7661ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko int n = getfdpath(tcp, fd, path, sizeof(path)); 778a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 7861ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko return n >= 0 && pathmatch(path); 798a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards} 808a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 818a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards/* 828a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Add a path to the set we're tracing. 83894c7e3858ede412e37a1752c716bed7f30a9605Philippe Ombredanne * Specifying NULL will delete all paths. 848a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 857239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenkostatic void 868a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardsstorepath(const char *path) 878a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards{ 887239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko unsigned i; 898a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 907239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko if (pathmatch(path)) 917239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko return; /* already in table */ 928a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 937239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko i = num_selected++; 9438cfe7c92328e940c71074c9b579b5bf9f2cb2f6Denys Vlasenko paths_selected = realloc(paths_selected, num_selected * sizeof(paths_selected[0])); 9538cfe7c92328e940c71074c9b579b5bf9f2cb2f6Denys Vlasenko if (!paths_selected) 967239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko die_out_of_memory(); 9738cfe7c92328e940c71074c9b579b5bf9f2cb2f6Denys Vlasenko paths_selected[i] = path; 988a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards} 998a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1008a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards/* 1018a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Get path associated with fd. 1028a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 10361ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenkoint 10461ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenkogetfdpath(struct tcb *tcp, int fd, char *buf, unsigned bufsize) 1058a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards{ 106384b0ada7d821f3797bf5d72dcf096032d662193Denys Vlasenko char linkpath[sizeof("/proc/%u/fd/%u") + 2 * sizeof(int)*3]; 1078a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards ssize_t n; 1088a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1098a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (fd < 0) 11061ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko return -1; 1118a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 11229865e77e6eee0c380befd0ce53657b5604975efDenys Vlasenko sprintf(linkpath, "/proc/%u/fd/%u", tcp->pid, fd); 11361ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko n = readlink(linkpath, buf, bufsize - 1); 11461ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko /* 11561ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko * NB: if buf is too small, readlink doesn't fail, 11661ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko * it returns truncated result (IOW: n == bufsize - 1). 11761ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko */ 11861ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko if (n >= 0) 11961ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko buf[n] = '\0'; 12061ad0a401c6d1b7b4c1a209f9d61c3790e1e7d15Denys Vlasenko return n; 1218a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards} 1228a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1238a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards/* 1248a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Add a path to the set we're tracing. Also add the canonicalized 1258a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * version of the path. Secifying NULL will delete all paths. 1268a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 1277239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenkovoid 1288a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardspathtrace_select(const char *path) 1298a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards{ 13029865e77e6eee0c380befd0ce53657b5604975efDenys Vlasenko char *rpath; 1318a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1327239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko storepath(path); 1338a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1348a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards rpath = realpath(path, NULL); 1358a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1368a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (rpath == NULL) 1377239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko return; 1388a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1398a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* if realpath and specified path are same, we're done */ 14029865e77e6eee0c380befd0ce53657b5604975efDenys Vlasenko if (strcmp(path, rpath) == 0) { 1418a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards free(rpath); 1427239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko return; 1438a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 1448a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1458a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards fprintf(stderr, "Requested path '%s' resolved into '%s'\n", 1468a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards path, rpath); 1477239dbcf2dff792f408c60fe3e278f707fdf497bDenys Vlasenko storepath(rpath); 1488a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards} 1498a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1508a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards/* 1518a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Return true if syscall accesses a selected path 1528a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * (or if no paths have been specified for tracing). 1538a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 1548a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardsint 1558a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwardspathtrace_match(struct tcb *tcp) 1568a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards{ 157a9fe13c9437707fa132fde4e51a20d88381e7430Denys Vlasenko const struct_sysent *s; 1588a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 15974ec14f968a418691b851cbbfeb0269174c64b08Denys Vlasenko s = tcp->s_ent; 1608a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 161894c7e3858ede412e37a1752c716bed7f30a9605Philippe Ombredanne if (!(s->sys_flags & (TRACE_FILE | TRACE_DESC | TRACE_NETWORK))) 1628a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 0; 1638a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1648a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* 1658a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Check for special cases where we need to do something 1668a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * other than test arg[0]. 1678a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 1688a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1698a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (s->sys_func == sys_dup2 || 1708a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_dup3 || 1718a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_sendfile || 1728a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_sendfile64 || 173ad178c0dc050a0bd68179ca60f3aebe0ff6ddd89Dmitry V. Levin s->sys_func == sys_tee) 1748a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards { 1758a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* fd, fd */ 1768a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return fdmatch(tcp, tcp->u_arg[0]) || 1778a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards fdmatch(tcp, tcp->u_arg[1]); 1788a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 1798a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1808a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (s->sys_func == sys_inotify_add_watch || 1818a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_faccessat || 1828a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_fchmodat || 1838a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_futimesat || 1848a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_unlinkat || 1858a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_newfstatat || 1868a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_mknodat || 1878a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_openat || 1888a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_readlinkat || 1898a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_utimensat || 1908a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_fchownat || 191b63256e69bf3f1a74aadb0e14556490bc8f4ef95Denys Vlasenko s->sys_func == sys_pipe2) 1928a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards { 1938a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* fd, path */ 1948a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return fdmatch(tcp, tcp->u_arg[0]) || 1958a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards upathmatch(tcp, tcp->u_arg[1]); 1968a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 1978a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 1988a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (s->sys_func == sys_link || 199b63256e69bf3f1a74aadb0e14556490bc8f4ef95Denys Vlasenko s->sys_func == sys_mount) 2008a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards { 2018a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* path, path */ 2028a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return upathmatch(tcp, tcp->u_arg[0]) || 2038a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards upathmatch(tcp, tcp->u_arg[1]); 2048a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 2058a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 2067943966f6cd137e44f27d56aaf21b023fb1fae63Dmitry V. Levin if (s->sys_func == sys_quotactl) 2077943966f6cd137e44f27d56aaf21b023fb1fae63Dmitry V. Levin { 2087943966f6cd137e44f27d56aaf21b023fb1fae63Dmitry V. Levin /* x, path */ 2097943966f6cd137e44f27d56aaf21b023fb1fae63Dmitry V. Levin return upathmatch(tcp, tcp->u_arg[1]); 2107943966f6cd137e44f27d56aaf21b023fb1fae63Dmitry V. Levin } 2117943966f6cd137e44f27d56aaf21b023fb1fae63Dmitry V. Levin 2128a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (s->sys_func == sys_renameat || 2135b677ab904f4ab8b272fdc78b2b9e8321412392dMike Frysinger s->sys_func == sys_renameat2 || 214b63256e69bf3f1a74aadb0e14556490bc8f4ef95Denys Vlasenko s->sys_func == sys_linkat) 2158a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards { 2168a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* fd, path, fd, path */ 2178a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return fdmatch(tcp, tcp->u_arg[0]) || 2188a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards fdmatch(tcp, tcp->u_arg[2]) || 2198a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards upathmatch(tcp, tcp->u_arg[1]) || 2208a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards upathmatch(tcp, tcp->u_arg[3]); 2218a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 2228a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 22335be58119e3727a694d8c9f9b83f372401fcc4c0H.J. Lu if ( 22435be58119e3727a694d8c9f9b83f372401fcc4c0H.J. Lu s->sys_func == sys_old_mmap || 2251ba85436def7da80971aeb902fbc6e52997a46faDenys Vlasenko#if defined(S390) 2261ba85436def7da80971aeb902fbc6e52997a46faDenys Vlasenko s->sys_func == sys_old_mmap_pgoff || 2271ba85436def7da80971aeb902fbc6e52997a46faDenys Vlasenko#endif 2281ba85436def7da80971aeb902fbc6e52997a46faDenys Vlasenko s->sys_func == sys_mmap || 2291ba85436def7da80971aeb902fbc6e52997a46faDenys Vlasenko s->sys_func == sys_mmap_pgoff || 2301ba85436def7da80971aeb902fbc6e52997a46faDenys Vlasenko s->sys_func == sys_mmap_4koff 2311ba85436def7da80971aeb902fbc6e52997a46faDenys Vlasenko ) { 2328a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* x, x, x, x, fd */ 2338a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return fdmatch(tcp, tcp->u_arg[4]); 2348a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 2358a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 2367b609d5ba0852e6c56ba311350ebd4412361777bDenys Vlasenko if (s->sys_func == sys_symlinkat) { 2378a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* path, fd, path */ 2388a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return fdmatch(tcp, tcp->u_arg[1]) || 2398a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards upathmatch(tcp, tcp->u_arg[0]) || 240b63256e69bf3f1a74aadb0e14556490bc8f4ef95Denys Vlasenko upathmatch(tcp, tcp->u_arg[2]); 2418a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 2428a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 243ad178c0dc050a0bd68179ca60f3aebe0ff6ddd89Dmitry V. Levin if (s->sys_func == sys_splice) { 2448a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* fd, x, fd, x, x */ 2458a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return fdmatch(tcp, tcp->u_arg[0]) || 2468a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards fdmatch(tcp, tcp->u_arg[2]); 2478a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 2488a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 2497b609d5ba0852e6c56ba311350ebd4412361777bDenys Vlasenko if (s->sys_func == sys_epoll_ctl) { 2508a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* x, x, fd, x */ 2518a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return fdmatch(tcp, tcp->u_arg[2]); 2528a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 2538a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 25499db95dd039d8fd700e7759bf4969abb55b979b9Dmitry V. Levin if (s->sys_func == sys_fanotify_mark) { 25599db95dd039d8fd700e7759bf4969abb55b979b9Dmitry V. Levin /* x, x, x, fd, path */ 25699db95dd039d8fd700e7759bf4969abb55b979b9Dmitry V. Levin return fdmatch(tcp, tcp->u_arg[3]) || 25799db95dd039d8fd700e7759bf4969abb55b979b9Dmitry V. Levin upathmatch(tcp, tcp->u_arg[4]); 25899db95dd039d8fd700e7759bf4969abb55b979b9Dmitry V. Levin } 25999db95dd039d8fd700e7759bf4969abb55b979b9Dmitry V. Levin 2608a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (s->sys_func == sys_select || 2618a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_oldselect || 262b63256e69bf3f1a74aadb0e14556490bc8f4ef95Denys Vlasenko s->sys_func == sys_pselect6) 2638a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards { 26479a79ea851250a30005d6323b20a9e30d9f336c1Denys Vlasenko int i, j; 26564778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko int nfds; 2668a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards long *args, oldargs[5]; 2678a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards unsigned fdsize; 2688a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards fd_set *fds; 2698a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 27064778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko args = tcp->u_arg; 2717b609d5ba0852e6c56ba311350ebd4412361777bDenys Vlasenko if (s->sys_func == sys_oldselect) { 2728a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (umoven(tcp, tcp->u_arg[0], sizeof oldargs, 2737e69ed98cdd3c8ee0bba783927bc95b895c60160Denys Vlasenko oldargs) < 0) 2748a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards { 2758a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards fprintf(stderr, "umoven() failed\n"); 2768a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 0; 2778a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 2788a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards args = oldargs; 27964778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko } 2808a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 28164778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko /* Kernel truncates arg[0] to int, we do the same. */ 28264778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko nfds = (int) args[0]; 28364778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko /* Kernel rejects negative nfds, so we don't parse it either. */ 28464778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko if (nfds <= 0) 28564778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko return 0; 28679a79ea851250a30005d6323b20a9e30d9f336c1Denys Vlasenko /* Beware of select(2^31-1, NULL, NULL, NULL) and similar... */ 28764778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko if (nfds > 1024*1024) 28879a79ea851250a30005d6323b20a9e30d9f336c1Denys Vlasenko nfds = 1024*1024; 28964778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko fdsize = (((nfds + 7) / 8) + current_wordsize-1) & -current_wordsize; 2908a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards fds = malloc(fdsize); 2911d46ba57a8ab16b353b531f2bbefe2ad7f354ca9Denys Vlasenko if (!fds) 2921d46ba57a8ab16b353b531f2bbefe2ad7f354ca9Denys Vlasenko die_out_of_memory(); 2938a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 2947b609d5ba0852e6c56ba311350ebd4412361777bDenys Vlasenko for (i = 1; i <= 3; ++i) { 2958a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (args[i] == 0) 2968a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards continue; 2977e69ed98cdd3c8ee0bba783927bc95b895c60160Denys Vlasenko if (umoven(tcp, args[i], fdsize, fds) < 0) { 2988a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards fprintf(stderr, "umoven() failed\n"); 2998a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards continue; 3008a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 30164778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko for (j = 0;; j++) { 30264778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko j = next_set_bit(fds, j, nfds); 30364778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko if (j < 0) 30464778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko break; 30564778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko if (fdmatch(tcp, j)) { 3068a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards free(fds); 3078a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 1; 3088a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 30964778cbfa62d9584c59d3a48b69ba1ebf8bd24e9Denys Vlasenko } 3108a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 3118a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards free(fds); 3128a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 0; 3138a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 3148a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3158a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (s->sys_func == sys_poll || 316b63256e69bf3f1a74aadb0e14556490bc8f4ef95Denys Vlasenko s->sys_func == sys_ppoll) 3178a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards { 3188a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards struct pollfd fds; 3198a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards unsigned nfds; 3208a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards unsigned long start, cur, end; 3218a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3228a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards start = tcp->u_arg[0]; 3238a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards nfds = tcp->u_arg[1]; 3248a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3258a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards end = start + sizeof(fds) * nfds; 3268a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3278a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (nfds == 0 || end < start) 3288a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 0; 3298a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3308a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards for (cur = start; cur < end; cur += sizeof(fds)) 3317e69ed98cdd3c8ee0bba783927bc95b895c60160Denys Vlasenko if ((umoven(tcp, cur, sizeof fds, &fds) == 0) 3328a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards && fdmatch(tcp, fds.fd)) 3338a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 1; 3348a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3358a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 0; 3368a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 3378a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3388a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (s->sys_func == printargs || 3398a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_pipe || 3408a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_pipe2 || 3418a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_eventfd2 || 3428a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_eventfd || 3438a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_inotify_init1 || 3448a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_timerfd_create || 3458a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_timerfd_settime || 3468a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_timerfd_gettime || 3478a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards s->sys_func == sys_epoll_create || 348894c7e3858ede412e37a1752c716bed7f30a9605Philippe Ombredanne s->sys_func == sys_socket || 349894c7e3858ede412e37a1752c716bed7f30a9605Philippe Ombredanne s->sys_func == sys_socketpair || 35099db95dd039d8fd700e7759bf4969abb55b979b9Dmitry V. Levin s->sys_func == sys_fanotify_init) 3518a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards { 3528a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* 353894c7e3858ede412e37a1752c716bed7f30a9605Philippe Ombredanne * These have TRACE_FILE or TRACE_DESCRIPTOR or TRACE_NETWORK set, 354894c7e3858ede412e37a1752c716bed7f30a9605Philippe Ombredanne * but they don't have any file descriptor or path args to test. 3558a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 3568a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 0; 3578a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards } 3588a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3598a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards /* 3608a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * Our fallback position for calls that haven't already 3618a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards * been handled is to just check arg[0]. 3628a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards */ 3638a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3648a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards if (s->sys_flags & TRACE_FILE) 3658a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return upathmatch(tcp, tcp->u_arg[0]); 3668a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 367894c7e3858ede412e37a1752c716bed7f30a9605Philippe Ombredanne if (s->sys_flags & (TRACE_DESC | TRACE_NETWORK)) 3688a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return fdmatch(tcp, tcp->u_arg[0]); 3698a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards 3708a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards return 0; 3718a08277d13d0378c2ff3ce851534c3bf7e31defaGrant Edwards} 372