mirror of
https://github.com/valitydev/osquery-1.git
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87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
/*
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* Copyright (c) 2014, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#include <sys/shm.h>
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#include <pwd.h>
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#include <osquery/core.h>
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#include <osquery/filesystem.h>
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#include <osquery/logger.h>
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#include <osquery/tables.h>
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namespace osquery {
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namespace tables {
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struct shm_info {
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int used_ids;
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unsigned long shm_tot;
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unsigned long shm_rss;
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unsigned long shm_swp;
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unsigned long swap_attempts;
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unsigned long swap_successes;
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} __attribute__((unused));
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QueryData genSharedMemory(QueryContext &context) {
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QueryData results;
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// Use shared memory control (shmctl) to get the max SHMID.
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struct shm_info shm_info;
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int maxid = shmctl(0, SHM_INFO, (struct shmid_ds *)(void *)&shm_info);
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if (maxid < 0) {
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VLOG(1) << "Linux kernel not configured for shared memory";
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return {};
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}
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// Use a static pointer to access IPC permissions structure.
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struct shmid_ds shmseg;
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struct ipc_perm *ipcp = &shmseg.shm_perm;
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// Then iterate each shared memory ID up to the max.
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for (int id = 0; id <= maxid; id++) {
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int shmid = shmctl(id, SHM_STAT, &shmseg);
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if (shmid < 0) {
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continue;
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}
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Row r;
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r["shmid"] = INTEGER(shmid);
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struct passwd *pw = getpwuid(shmseg.shm_perm.uid);
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if (pw != nullptr) {
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r["owner_uid"] = BIGINT(pw->pw_uid);
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}
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pw = getpwuid(shmseg.shm_perm.cuid);
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if (pw != nullptr) {
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r["creator_uid"] = BIGINT(pw->pw_uid);
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}
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// Accessor, creator pids.
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r["pid"] = BIGINT(shmseg.shm_lpid);
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r["creator_pid"] = BIGINT(shmseg.shm_cpid);
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// Access, detached, creator times
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r["atime"] = BIGINT(shmseg.shm_atime);
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r["dtime"] = BIGINT(shmseg.shm_dtime);
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r["ctime"] = BIGINT(shmseg.shm_ctime);
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r["permissions"] = lsperms(ipcp->mode);
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r["size"] = BIGINT(shmseg.shm_segsz);
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r["attached"] = INTEGER(shmseg.shm_nattch);
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r["status"] = (ipcp->mode & SHM_DEST) ? "dest" : "";
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r["locked"] = (ipcp->mode & SHM_LOCKED) ? "1" : "0";
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results.push_back(r);
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}
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return results;
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}
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}
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} |