/usr/src/linux2.4/include/asm-i386/unistd.h
/usr/include/linux/unistd.h
/usr/include/unistd.h
There are there files named unistd.h, as listed above, in my box. I am a
little confused. Can someone clarify if my understanding is correct? and
explain there relationship?
When I write a program such as main.c, I believe I am using the third one
"/usr/include/unistd.h"--so it's from glibc package; when I build a compile
a linux binary, I believe I am going to use the first one
"/usr/src/linux2.4/include/asm-i386/unistd.h"--so it's from kernel source;
what is the functionality of the second one, "/usr/include/linux/unistd.h"?
I guess it's somehow generated from the first one.
//main.c
#include <unistd.h>
int main(){
write(0, "test", 4);
}
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