-bash-3.2$ truss -t open firefox
open("/var/ld/ld.config", O_RDONLY)             Err#2 ENOENT
open("/lib/libc.so.1", O_RDONLY)                = 3
open("/usr/lib/locale/en_US.UTF-8/en_US.UTF-8.so.3", O_RDONLY) = 3
open("/usr/lib/locale/en_US.UTF-8/methods_en_US.UTF-8.so.3", O_RDONLY) = 3
open64("/usr/bin/firefox", O_RDONLY)            = 3
open("/lib/libgen.so.1", O_RDONLY)              = 3