http://www.di.uevora.pt/~lmr/syscalls.html

http://www.softpanorama.org/Internals/unix_system_calls.shtml

http://www.csie.ntnu.edu.tw/~ghhwang/course_slices/OS/Unix_System_Calls.pdf

http://www.cs.cf.ac.uk/Dave/C/     Programming in CUNIX System Calls and Subroutines using C.

http://poincare.matf.bg.ac.rs/~ivana/courses/ps/sistemi_knjige/apue.pdf     unix环境高级编程

http://infohost.nmt.edu/~eweiss/222_book/222_book.html  在线版