ssize_t attribute_hidden _cs_write(void *cookie, const char *buf, size_t bufsize)
{
        return write(*((int *) cookie), (char *) buf, bufsize);
}
what does cs stand for here? (Hm.. seems like custom streams..in the code) and I couldn't follow past write above. Where is the function write defined?

 
Hi Chan,

write is a system call.

$ man 2 write

syscall table for x86 architecture can be found in :  <path>/arch/x86/syscalls/syscall_32.tbl

# cat <path>/arch/x86/syscalls/syscall_32.tbl | grep 'write'

4       i386    write                   sys_write

The format is:
<number> <abi> <name> <entry point> <compat entry point>

search sys_write definition in kernel source.

Thanks
Mohan L