How to exit with Ctrl+D like bash with execl?

How to exit with Ctrl+D like bash with execl?

References

Reference NO 1

http://stackoverflow.com/questions/15191049/how-to-exit-with-ctrld-like-bash-with-execl

Reference NO 2

http://mugurel.sumanariu.ro/linux/bash-how-to-stop-accidental-exiting-with-ctrld/

Reference NO 3

http://www.thetechrepo.com/main-articles/573-display-a-spinner-or-loading-animation-and-also-capture-exit-code-of-child-process-in-bash.html

Reference NO 4

http://manuals.bioinformatics.ucr.edu/home/linux-basics

Reference NO 5

http://apple.stackexchange.com/questions/5435/got-any-tips-or-tricks-for-terminal-in-mac-os-x

Reference NO 6

http://www.vidarholen.net/contents/blog/

Reference NO 7

http://www.thc.org/root/docs/exploit_writing/sol-ne-stack.html

Reference NO 8

http://www.howtogeek.com/howto/ubuntu/keyboard-shortcuts-for-bash-command-shell-for-ubuntu-debian-suse-redhat-linux-etc/