1 /* 2 * This file is part of attach-p-cmd strace test. 3 * 4 * Copyright (c) 2016-2017 Dmitry V. Levin <ldv@altlinux.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "tests.h" 31 #include <errno.h> 32 #include <signal.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <sys/stat.h> 36 #include <time.h> 37 #include <unistd.h> 38 #include "attach-p-cmd.h" 39 40 static void 41 wait_for_peer_invocation(void) 42 { 43 /* create the lock directory */ 44 if (mkdir(lockdir, 0700)) 45 perror_msg_and_fail("mkdir: %s", lockdir); 46 47 /* wait for the lock directory to be removed by peer */ 48 while (mkdir(lockdir, 0700)) { 49 if (EEXIST != errno) 50 perror_msg_and_fail("mkdir: %s", lockdir); 51 } 52 53 /* cleanup the lock directory */ 54 if (rmdir(lockdir)) 55 perror_msg_and_fail("rmdir: %s", lockdir); 56 } 57 58 static void 59 wait_for_peer_termination(void) 60 { 61 FILE *fp = fopen(pidfile, "r"); 62 if (!fp) 63 perror_msg_and_fail("fopen: %s", pidfile); 64 65 pid_t pid; 66 if (fscanf(fp, "%d", &pid) < 0) 67 perror_msg_and_fail("fscanf: %s", pidfile); 68 if (pid < 0) 69 error_msg_and_fail("pid = %d", pid); 70 71 if (fclose(fp)) 72 perror_msg_and_fail("fclose: %s", pidfile); 73 74 if (unlink(pidfile)) 75 perror_msg_and_fail("unlink: %s", pidfile); 76 77 while (kill(pid, 0) == 0) 78 ; 79 } 80 81 int 82 main(void) 83 { 84 wait_for_peer_invocation(); 85 wait_for_peer_termination(); 86 87 static const struct timespec ts = { .tv_nsec = 123456789 }; 88 if (nanosleep(&ts, NULL)) 89 perror_msg_and_fail("nanosleep"); 90 91 static const char dir[] = "attach-p-cmd.test -p"; 92 pid_t pid = getpid(); 93 int rc = chdir(dir); 94 95 printf("%-5d chdir(\"%s\") = %s\n" 96 "%-5d +++ exited with 0 +++\n", 97 pid, dir, sprintrc(rc), pid); 98 99 return 0; 100 } 101