Date: Tue, 19 Sep 2023 12:53:45 +0300 From: Dmitry Chagin <dchagin@freebsd.org> To: Rocky Hotas <rockyhotas@post.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Error while building a kernel module with mkdir(2) Message-ID: <ZQlvqfOZ3AwluExw@heemeyer.club> In-Reply-To: <trinity-2c27b4d2-a301-466b-941e-2577e4886a49-1695071577376@3c-app-mailcom-lxa16> References: <trinity-2c27b4d2-a301-466b-941e-2577e4886a49-1695071577376@3c-app-mailcom-lxa16>
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On Mon, Sep 18, 2023 at 11:12:57PM +0200, Rocky Hotas wrote: > Hello! > I hope this is the right ML to discuss about this issue. I am trying to > build the example kernel module presented in paragraph 2.1 of > > Designing BSD Rootkits: An Introduction to Kernel Hacking > by Joseph Kong > > However, I get this error: > > mkdir_hook.c:42:9: error: implicit declaration of function 'mkdir' is invalid in C99 [-Werror,-Wimplicit-function-declaration] > return(mkdir(td, syscall_args)); > ^ > mkdir_hook.c:57:45: error: use of undeclared identifier 'mkdir' > sysent[SYS_mkdir].sy_call = (sy_call_t *)mkdir; > > mkdir(2) requires `#include <sys/stat.h>' and I added it (while it was > not in the code from the book), but nothing changes. > > What's still wrong? > No more mkdir, look for kern_mkdirat at syscallsubr.h
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