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Linux started out with fewer system calls than it has now.

Let say in 2.6.32, how many system calls are there?

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closed as off topic by Dennis Williamson, Ben Pilbrow, Steven Monday, Scott Pack, joeqwerty Feb 15 '11 at 0:50

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1 Answer 1

up vote 5 down vote accepted

if you look at the source in src/linux2.x/include/asm-generic/unistd.h

__NR_syscalls tells you the number of system calls and also tells you what it is.

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That would be 242 system calls (git.kernel.org/?p=linux/kernel/git/longterm/…), less than what I expected –  Aleksandr Levchuk Feb 15 '11 at 1:44

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