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Message: [QUOTE="Eric Schwartz, post: 4742173"] To reproduce this properly, you'd need a bash program that just did: exec /home/t/c/a.out and you'd invoke the bash program there. This unbuffers STDOUT, which doesn't help when the problem is that the OS is buffering the TEST filehandle. How is reading input that doesn't show up a character at a time going to help? Either it's there, or it isn't; reading it in smaller chunks is just making things more inefficient without actually changing anything. I'm afraid not. Thanks for the effort, anyhow. -=Eric [/QUOTE]