...
open("/tmp/PerlIO_Ol6dlF", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlink("/tmp/PerlIO_Ol6dlF")            = 0
open("/tmp/PerlIO_WFvCgM", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlink("/tmp/PerlIO_WFvCgM")            = 0
open("/tmp/PerlIO_su06bT", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlink("/tmp/PerlIO_su06bT")            = 0
open("/tmp/PerlIO_HAAg8Z", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlink("/tmp/PerlIO_HAAg8Z")            = 0
Use of uninitialized value in open at ./799021.pl line 32.
open("", O_WRONLY|O_CREAT|O_TRUNC, 0666) = -1 ENOENT (No such file or directory)
...