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 <stdio.h> 33 #include <sys/stat.h> 34 #include <unistd.h> 35 #include "attach-p-cmd.h" 36 37 static void 38 write_pidfile(const pid_t pid) 39 { 40 FILE *fp = fopen(pidfile, "w"); 41 if (!fp) 42 perror_msg_and_fail("fopen: %s", pidfile); 43 44 if (fprintf(fp, "%d", pid) < 0) 45 perror_msg_and_fail("fprintf: %s", pidfile); 46 47 if (fclose(fp)) 48 perror_msg_and_fail("fclose: %s", pidfile); 49 } 50 51 static void 52 wait_for_peer_invocation(void) 53 { 54 /* wait for the lock directory to be created by peer */ 55 while (rmdir(lockdir)) { 56 if (ENOENT != errno) 57 perror_msg_and_fail("rmdir: %s", lockdir); 58 } 59 } 60 61 int 62 main(void) 63 { 64 const pid_t pid = getpid(); 65 write_pidfile(pid); 66 67 wait_for_peer_invocation(); 68 69 static const char dir[] = "attach-p-cmd.test cmd"; 70 int rc = chdir(dir); 71 72 printf("%-5d chdir(\"%s\") = %s\n" 73 "%-5d +++ exited with 0 +++\n", 74 pid, dir, sprintrc(rc), pid); 75 76 return 0; 77 } 78