$ strace ./date.upx.force-execve ... open("/tmp/upxDKH3WN3ADWZ", O_RDONLY) = 3 getpid() = 3801 access("/proc/3801/fd/3", R_OK|X_OK) = 0 unlink("/tmp/upxDKH3WN3ADWZ") = 0 fcntl(3, F_SETFD, FD_CLOEXEC) = 0 execve("/proc/3801/fd/3", ["./date.exe"], [/* 35 vars */] <unfinished ...> +++ killed by SIGKILL +++
$ strace ./date. upx.force- execve tmp/upxDKH3WN3A DWZ", O_RDONLY) = 3 "/proc/ 3801/fd/ 3", R_OK|X_OK) = 0 "/tmp/upxDKH3WN 3ADWZ") = 0 "/proc/ 3801/fd/ 3", ["./date.exe"], [/* 35 vars */] <unfinished ...>
...
open("/
getpid() = 3801
access(
unlink(
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
execve(
+++ killed by SIGKILL +++