Improved the program that checks for broken large-file locking.

diff --git a/configure.in b/configure.in
index 245a769..000a723 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -146,21 +146,26 @@ AC_TRY_RUN([
 int main(void)
 {
        struct flock lock;
-        int status;
-       int fd = open("conftest.dat", O_CREAT|O_RDWR, 0600);
+       int status;
+       char tpl[32] = "/tmp/locktest.XXXXXX";
+       int fd = mkstemp(tpl);
+       if (fd < 0) {
+               strcpy(tpl, "conftest.dat");
+               fd = open(tpl, O_CREAT|O_RDWR, 0600);
+       }
+
        lock.l_type = F_WRLCK;
        lock.l_whence = SEEK_SET;
        lock.l_start = 0;
        lock.l_len = 1;
        lock.l_pid = 0;
-       
        fcntl(fd,F_SETLK,&lock);
        if (fork() == 0) {
-               lock.l_start = 1;               
-               exit(fcntl(fd,F_SETLK,&lock) == 0);
-        }
-        wait(&status);
-       unlink("conftest.dat");
+               lock.l_start = 1;
+               _exit(fcntl(fd,F_SETLK,&lock) == 0);
+       }
+       wait(&status);
+       unlink(tpl);
        exit(WEXITSTATUS(status));
 }
 ],