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8338fe6ac8
We have waitpid in libreplace Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Michael Adam <obnox@samba.org>
118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
/* test whether fcntl locking works between threads on this Linux system */
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <sys/fcntl.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <pthread.h>
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#define DATA "conftest.fcntl"
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#define SEEK_SET 0
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static void *test_thread(void *thread_parm)
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{
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int *status = thread_parm;
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int fd, ret;
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struct flock lock;
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sleep(2);
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fd = open(DATA, O_RDWR);
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if (fd == -1) {
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fprintf(stderr,"ERROR: failed to open %s (errno=%d)\n",
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DATA, (int)errno);
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pthread_exit(thread_parm);
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}
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lock.l_type = F_WRLCK;
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lock.l_whence = SEEK_SET;
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lock.l_start = 0;
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lock.l_len = 4;
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lock.l_pid = 0;
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/* check if a lock applies */
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ret = fcntl(fd,F_SETLK,&lock);
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if ((ret != -1)) {
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fprintf(stderr,"ERROR: lock test failed (ret=%d errno=%d)\n", ret, (int)errno);
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} else {
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*status = 0; /* SUCCESS! */
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}
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pthread_exit(thread_parm);
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}
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/* lock a byte range in a open file */
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int main(int argc, char *argv[])
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{
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struct flock lock;
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int fd, ret, status=1, rc;
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pid_t pid;
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char *testdir = NULL;
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pthread_t thread_id;
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pthread_attr_t thread_attr;
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testdir = getenv("TESTDIR");
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if (testdir) chdir(testdir);
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alarm(10);
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pthread_attr_init(&thread_attr);
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pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_DETACHED);
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rc = pthread_create(&thread_id, &thread_attr, &test_thread, &status);
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pthread_attr_destroy(&thread_attr);
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if (rc == 0) {
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fprintf(stderr,"created thread_id=%lu\n",
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(unsigned long int)thread_id);
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} else {
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fprintf(stderr,"ERROR: thread create failed, rc=%d\n", rc);
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}
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unlink(DATA);
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fd = open(DATA, O_RDWR|O_CREAT|O_RDWR, 0600);
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if (fd == -1) {
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fprintf(stderr,"ERROR: failed to open %s (errno=%d)\n",
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DATA, (int)errno);
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exit(1);
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}
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lock.l_type = F_WRLCK;
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lock.l_whence = SEEK_SET;
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lock.l_start = 0;
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lock.l_len = 4;
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lock.l_pid = getpid();
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/* set a 4 byte write lock */
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fcntl(fd,F_SETLK,&lock);
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sleep(4); /* allow thread to try getting lock */
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unlink(DATA);
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#if defined(WIFEXITED) && defined(WEXITSTATUS)
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if(WIFEXITED(status)) {
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status = WEXITSTATUS(status);
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} else {
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status = 1;
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}
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#else /* defined(WIFEXITED) && defined(WEXITSTATUS) */
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status = (status == 0) ? 0 : 1;
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#endif /* defined(WIFEXITED) && defined(WEXITSTATUS) */
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if (status) {
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fprintf(stderr,"ERROR: lock test failed with status=%d\n",
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status);
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}
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exit(status);
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}
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