1101902Salfred/*- 2101902Salfred * Copyright (c) 1999 The NetBSD Foundation, Inc. 3101902Salfred * All rights reserved. 4101902Salfred * 5101902Salfred * This code is derived from software contributed to The NetBSD Foundation 6101902Salfred * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 7101902Salfred * NASA Ames Research Center. 8101902Salfred * 9101902Salfred * Redistribution and use in source and binary forms, with or without 10101902Salfred * modification, are permitted provided that the following conditions 11101902Salfred * are met: 12101902Salfred * 1. Redistributions of source code must retain the above copyright 13101902Salfred * notice, this list of conditions and the following disclaimer. 14101902Salfred * 2. Redistributions in binary form must reproduce the above copyright 15101902Salfred * notice, this list of conditions and the following disclaimer in the 16101902Salfred * documentation and/or other materials provided with the distribution. 17101902Salfred * 18101902Salfred * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19101902Salfred * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20101902Salfred * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21101902Salfred * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22101902Salfred * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23101902Salfred * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24101902Salfred * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25101902Salfred * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26101902Salfred * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27101902Salfred * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28101902Salfred * POSSIBILITY OF SUCH DAMAGE. 29101902Salfred * 30101902Salfred * Obtained from: $NetBSD: shmtest.c,v 1.3 2002/07/20 08:36:26 grant Exp $ 31101902Salfred * $FreeBSD: releng/10.3/tools/regression/sysvshm/shmtest.c 280494 2015-03-25 08:23:08Z kib $ 32101902Salfred */ 33101902Salfred 34101902Salfred/* 35101902Salfred * Test the SVID-compatible Shared Memory facility. 36101902Salfred */ 37101902Salfred 38235719Skevlo#include <sys/types.h> 39101902Salfred#include <sys/ipc.h> 40101902Salfred#include <sys/shm.h> 41101902Salfred#include <sys/wait.h> 42101902Salfred 43101902Salfred#include <err.h> 44101902Salfred#include <errno.h> 45101902Salfred#include <signal.h> 46101902Salfred#include <stdio.h> 47101902Salfred#include <stdlib.h> 48101902Salfred#include <string.h> 49101902Salfred#include <time.h> 50101902Salfred#include <unistd.h> 51101902Salfred 52280494Skibstatic void print_shmid_ds(struct shmid_ds *, mode_t); 53280494Skibstatic void sigsys_handler(int); 54280494Skibstatic void sigchld_handler(int); 55280494Skibstatic void cleanup(void); 56280494Skibstatic void receiver(void); 57280494Skibstatic void usage(void); 58101902Salfred 59280494Skibstatic const char *m_str = "The quick brown fox jumped over the lazy dog."; 60101902Salfred 61280494Skibstatic int sender_shmid = -1; 62280494Skibstatic pid_t child_pid; 63280494Skibstatic key_t shmkey; 64280494Skibstatic size_t pgsize; 65101902Salfred 66101902Salfredint 67280494Skibmain(int argc, char *argv[]) 68101902Salfred{ 69101902Salfred struct sigaction sa; 70101902Salfred struct shmid_ds s_ds; 71101902Salfred sigset_t sigmask; 72101902Salfred char *shm_buf; 73101902Salfred 74101902Salfred if (argc != 2) 75101902Salfred usage(); 76101902Salfred 77101902Salfred /* 78101902Salfred * Install a SIGSYS handler so that we can exit gracefully if 79101902Salfred * System V Shared Memory support isn't in the kernel. 80101902Salfred */ 81101902Salfred sa.sa_handler = sigsys_handler; 82101902Salfred sigemptyset(&sa.sa_mask); 83101902Salfred sa.sa_flags = 0; 84101902Salfred if (sigaction(SIGSYS, &sa, NULL) == -1) 85101902Salfred err(1, "sigaction SIGSYS"); 86101902Salfred 87101902Salfred /* 88101902Salfred * Install and SIGCHLD handler to deal with all possible exit 89101902Salfred * conditions of the receiver. 90101902Salfred */ 91101902Salfred sa.sa_handler = sigchld_handler; 92101902Salfred sigemptyset(&sa.sa_mask); 93101902Salfred sa.sa_flags = 0; 94101902Salfred if (sigaction(SIGCHLD, &sa, NULL) == -1) 95101902Salfred err(1, "sigaction SIGCHLD"); 96101902Salfred 97101902Salfred pgsize = sysconf(_SC_PAGESIZE); 98101902Salfred 99101902Salfred shmkey = ftok(argv[1], 4160); 100101902Salfred 101101902Salfred /* 102101902Salfred * Initialize child_pid to ourselves to that the cleanup function 103101902Salfred * works before we create the receiver. 104101902Salfred */ 105101902Salfred child_pid = getpid(); 106101902Salfred 107101902Salfred /* 108101902Salfred * Make sure that when the sender exits, the message queue is 109101902Salfred * removed. 110101902Salfred */ 111101902Salfred if (atexit(cleanup) == -1) 112101902Salfred err(1, "atexit"); 113101902Salfred 114101902Salfred if ((sender_shmid = shmget(shmkey, pgsize, IPC_CREAT | 0640)) == -1) 115101902Salfred err(1, "shmget"); 116101902Salfred 117101902Salfred if (shmctl(sender_shmid, IPC_STAT, &s_ds) == -1) 118101902Salfred err(1, "shmctl IPC_STAT"); 119101902Salfred 120101902Salfred print_shmid_ds(&s_ds, 0640); 121101902Salfred 122101902Salfred s_ds.shm_perm.mode = (s_ds.shm_perm.mode & ~0777) | 0600; 123101902Salfred 124101902Salfred if (shmctl(sender_shmid, IPC_SET, &s_ds) == -1) 125101902Salfred err(1, "shmctl IPC_SET"); 126101902Salfred 127101902Salfred memset(&s_ds, 0, sizeof(s_ds)); 128101902Salfred 129101902Salfred if (shmctl(sender_shmid, IPC_STAT, &s_ds) == -1) 130101902Salfred err(1, "shmctl IPC_STAT"); 131101902Salfred 132101902Salfred if ((s_ds.shm_perm.mode & 0777) != 0600) 133101902Salfred err(1, "IPC_SET of mode didn't hold"); 134101902Salfred 135101902Salfred print_shmid_ds(&s_ds, 0600); 136101902Salfred 137101902Salfred if ((shm_buf = shmat(sender_shmid, NULL, 0)) == (void *) -1) 138101902Salfred err(1, "sender: shmat"); 139101902Salfred 140101902Salfred /* 141101902Salfred * Write the test pattern into the shared memory buffer. 142101902Salfred */ 143101902Salfred strcpy(shm_buf, m_str); 144101902Salfred 145101902Salfred switch ((child_pid = fork())) { 146101902Salfred case -1: 147101902Salfred err(1, "fork"); 148101902Salfred /* NOTREACHED */ 149101902Salfred 150101902Salfred case 0: 151101902Salfred receiver(); 152101902Salfred break; 153101902Salfred 154101902Salfred default: 155101902Salfred break; 156101902Salfred } 157101902Salfred 158101902Salfred /* 159101902Salfred * Suspend forever; when we get SIGCHLD, the handler will exit. 160101902Salfred */ 161101902Salfred sigemptyset(&sigmask); 162101902Salfred (void) sigsuspend(&sigmask); 163101902Salfred 164101902Salfred /* 165101902Salfred * ...and any other signal is an unexpected error. 166101902Salfred */ 167101902Salfred errx(1, "sender: received unexpected signal"); 168101902Salfred} 169101902Salfred 170280494Skibstatic void 171280494Skibsigsys_handler(int signo __unused) 172101902Salfred{ 173101902Salfred 174101902Salfred errx(1, "System V Shared Memory support is not present in the kernel"); 175101902Salfred} 176101902Salfred 177280494Skibstatic void 178280494Skibsigchld_handler(int signo __unused) 179101902Salfred{ 180101902Salfred struct shmid_ds s_ds; 181101902Salfred int cstatus; 182101902Salfred 183101902Salfred /* 184101902Salfred * Reap the child; if it exited successfully, then the test passed! 185101902Salfred */ 186101902Salfred if (waitpid(child_pid, &cstatus, 0) != child_pid) 187101902Salfred err(1, "waitpid"); 188101902Salfred 189101902Salfred if (WIFEXITED(cstatus) == 0) 190101902Salfred errx(1, "receiver exited abnormally"); 191101902Salfred 192101902Salfred if (WEXITSTATUS(cstatus) != 0) 193101902Salfred errx(1, "receiver exited with status %d", 194101902Salfred WEXITSTATUS(cstatus)); 195101902Salfred 196101902Salfred /* 197101902Salfred * If we get here, the child has exited normally, and thus 198101902Salfred * we should exit normally too. First, tho, we print out 199101902Salfred * the final stats for the message queue. 200101902Salfred */ 201101902Salfred 202101902Salfred if (shmctl(sender_shmid, IPC_STAT, &s_ds) == -1) 203101902Salfred err(1, "shmctl IPC_STAT"); 204101902Salfred 205101902Salfred print_shmid_ds(&s_ds, 0600); 206101902Salfred 207101902Salfred exit(0); 208101902Salfred} 209101902Salfred 210280494Skibstatic void 211280494Skibcleanup(void) 212101902Salfred{ 213101902Salfred 214101902Salfred /* 215101902Salfred * If we're the sender, and it exists, remove the shared memory area. 216101902Salfred */ 217101902Salfred if (child_pid != 0 && sender_shmid != -1) { 218101902Salfred if (shmctl(sender_shmid, IPC_RMID, NULL) == -1) 219101902Salfred warn("shmctl IPC_RMID"); 220101902Salfred } 221101902Salfred} 222101902Salfred 223280494Skibstatic void 224280494Skibprint_shmid_ds(struct shmid_ds *sp, mode_t mode) 225101902Salfred{ 226101902Salfred uid_t uid = geteuid(); 227101902Salfred gid_t gid = getegid(); 228101902Salfred 229101902Salfred printf("PERM: uid %d, gid %d, cuid %d, cgid %d, mode 0%o\n", 230101902Salfred sp->shm_perm.uid, sp->shm_perm.gid, 231101902Salfred sp->shm_perm.cuid, sp->shm_perm.cgid, 232101902Salfred sp->shm_perm.mode & 0777); 233101902Salfred 234101902Salfred printf("segsz %lu, lpid %d, cpid %d, nattch %u\n", 235101902Salfred (u_long)sp->shm_segsz, sp->shm_lpid, sp->shm_cpid, 236101902Salfred sp->shm_nattch); 237101902Salfred 238101902Salfred printf("atime: %s", ctime(&sp->shm_atime)); 239101902Salfred printf("dtime: %s", ctime(&sp->shm_dtime)); 240101902Salfred printf("ctime: %s", ctime(&sp->shm_ctime)); 241101902Salfred 242101902Salfred /* 243101902Salfred * Sanity check a few things. 244101902Salfred */ 245101902Salfred 246101902Salfred if (sp->shm_perm.uid != uid || sp->shm_perm.cuid != uid) 247101902Salfred errx(1, "uid mismatch"); 248101902Salfred 249101902Salfred if (sp->shm_perm.gid != gid || sp->shm_perm.cgid != gid) 250101902Salfred errx(1, "gid mismatch"); 251101902Salfred 252101902Salfred if ((sp->shm_perm.mode & 0777) != mode) 253101902Salfred errx(1, "mode mismatch"); 254101902Salfred} 255101902Salfred 256280494Skibstatic void 257280494Skibusage(void) 258101902Salfred{ 259101902Salfred 260101902Salfred fprintf(stderr, "usage: %s keypath\n", getprogname()); 261101902Salfred exit(1); 262101902Salfred} 263101902Salfred 264280494Skibstatic void 265280494Skibreceiver(void) 266101902Salfred{ 267101902Salfred int shmid; 268101902Salfred void *shm_buf; 269101902Salfred 270101902Salfred if ((shmid = shmget(shmkey, pgsize, 0)) == -1) 271101902Salfred err(1, "receiver: shmget"); 272101902Salfred 273101902Salfred if ((shm_buf = shmat(shmid, NULL, 0)) == (void *) -1) 274101902Salfred err(1, "receiver: shmat"); 275101902Salfred 276101902Salfred printf("%s\n", (const char *)shm_buf); 277101902Salfred if (strcmp((const char *)shm_buf, m_str) != 0) 278101902Salfred err(1, "receiver: data isn't correct"); 279101902Salfred 280101902Salfred exit(0); 281101902Salfred} 282