1 /* test whether fcntl locking works on this system */
3 #if defined(HAVE_UNISTD_H)
15 #ifdef HAVE_SYS_FCNTL_H
16 #include <sys/fcntl.h>
19 #ifdef HAVE_SYS_WAIT_H
25 static int sys_waitpid(pid_t pid,int *status,int options)
28 return waitpid(pid,status,options);
29 #else /* USE_WAITPID */
30 return wait4(pid, status, options, NULL);
31 #endif /* USE_WAITPID */
34 #define DATA "conftest.fcntl"
40 /* lock a byte range in a open file */
41 int main(int argc, char *argv[])
44 int fd, ret, status=1;
48 testdir = getenv("TESTDIR");
49 if (testdir) chdir(testdir);
55 fd = open(DATA, O_RDONLY);
58 fprintf(stderr,"ERROR: failed to open %s (errno=%d)\n",
63 lock.l_type = F_WRLCK;
64 lock.l_whence = SEEK_SET;
67 lock.l_pid = getpid();
69 lock.l_type = F_WRLCK;
71 /* check if a lock applies */
72 ret = fcntl(fd,F_GETLK,&lock);
75 (lock.l_type == F_UNLCK)) {
76 fprintf(stderr,"ERROR: lock test failed (ret=%d errno=%d)\n", ret, (int)errno);
84 fd = open(DATA, O_RDWR|O_CREAT|O_EXCL, 0600);
87 fprintf(stderr,"ERROR: failed to open %s (errno=%d)\n",
92 lock.l_type = F_WRLCK;
93 lock.l_whence = SEEK_SET;
96 lock.l_pid = getpid();
98 /* set a 4 byte write lock */
99 fcntl(fd,F_SETLK,&lock);
101 sys_waitpid(pid, &status, 0);
105 #if defined(WIFEXITED) && defined(WEXITSTATUS)
106 if(WIFEXITED(status)) {
107 status = WEXITSTATUS(status);
111 #else /* defined(WIFEXITED) && defined(WEXITSTATUS) */
112 status = (status == 0) ? 0 : 1;
113 #endif /* defined(WIFEXITED) && defined(WEXITSTATUS) */
116 fprintf(stderr,"ERROR: lock test failed with status=%d\n",