1 /* 2 * This file is part of attach-p-cmd strace test. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) 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 <unistd.h> 37 38 static void 39 handler(int signo) 40 { 41 } 42 43 int 44 main(void) 45 { 46 const struct sigaction act = { .sa_handler = handler }; 47 if (sigaction(SIGALRM, &act, NULL)) 48 perror_msg_and_fail("sigaction"); 49 50 sigset_t mask = {}; 51 sigaddset(&mask, SIGALRM); 52 if (sigprocmask(SIG_UNBLOCK, &mask, NULL)) 53 perror_msg_and_fail("sigprocmask"); 54 55 static const char lockdir[] = "attach-p-cmd.test-lock"; 56 /* create a lock directory */ 57 if (mkdir(lockdir, 0700)) 58 perror_msg_and_fail("mkdir: %s", lockdir); 59 60 /* wait for the lock directory to be removed by peer */ 61 while (mkdir(lockdir, 0700)) { 62 if (EEXIST != errno) 63 perror_msg_and_fail("mkdir: %s", lockdir); 64 } 65 66 /* remove the lock directory */ 67 if (rmdir(lockdir)) 68 perror_msg_and_fail("rmdir: %s", lockdir); 69 70 alarm(1); 71 pause(); 72 73 static const char dir[] = "attach-p-cmd.test -p"; 74 pid_t pid = getpid(); 75 int rc = chdir(dir); 76 77 printf("%-5d --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---\n" 78 "%-5d chdir(\"%s\") = %d %s (%m)\n" 79 "%-5d +++ exited with 0 +++\n", 80 pid, pid, dir, rc, errno2name(), pid); 81 82 return 0; 83 } 84
