/*
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* This file is part of attach-f-p strace test.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <assert.h>
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#include <errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <asm/unistd.h>
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#include <unistd.h>
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#define N 3
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typedef union {
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void *ptr;
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pid_t pid;
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} retval_t;
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static const char text_parent[] = "attach-f-p.test parent";
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static const char *child[N] = {
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"attach-f-p.test child 0",
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"attach-f-p.test child 1",
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"attach-f-p.test child 2"
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};
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typedef int pipefd[2];
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static pipefd pipes[N];
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static void *
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thread(void *a)
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{
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unsigned int no = (long) a;
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int i;
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if (read(pipes[no][0], &i, sizeof(i)) != (int) sizeof(i))
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perror_msg_and_fail("read[%u]", no);
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assert(chdir(child[no]) == -1);
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retval_t retval = { .pid = syscall(__NR_gettid) };
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return retval.ptr;
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}
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int
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main(void)
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{
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pthread_t t[N];
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unsigned int i;
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if (write(1, "", 0) != 0)
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perror_msg_and_fail("write");
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for (i = 0; i < N; ++i) {
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if (pipe(pipes[i]))
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perror_msg_and_fail("pipe");
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errno = pthread_create(&t[i], NULL, thread, (void *) (long) i);
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if (errno)
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perror_msg_and_fail("pthread_create");
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}
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if (write(1, "\n", 1) != 1)
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perror_msg_and_fail("write");
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/* wait for the peer to write to stdout */
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struct stat st;
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for (;;) {
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if (fstat(1, &st))
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perror_msg_and_fail("fstat");
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if (st.st_size >= 103)
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break;
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}
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for (i = 0; i < N; ++i) {
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/* sleep a bit to let the tracer catch up */
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sleep(1);
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if (write(pipes[i][1], &i, sizeof(i)) != (int) sizeof(i))
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perror_msg_and_fail("write[%u]", i);
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retval_t retval;
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errno = pthread_join(t[i], &retval.ptr);
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if (errno)
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perror_msg_and_fail("pthread_join");
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errno = ENOENT;
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printf("%-5d chdir(\"%s\") = %s\n"
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"%-5d +++ exited with 0 +++\n",
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retval.pid, child[i], sprintrc(-1), retval.pid);
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}
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/* sleep a bit more to let the tracer catch up */
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sleep(1);
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pid_t pid = getpid();
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assert(chdir(text_parent) == -1);
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printf("%-5d chdir(\"%s\") = -1 ENOENT (%m)\n"
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"%-5d +++ exited with 0 +++\n", pid, text_parent, pid);
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return 0;
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}
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