system-calls

Starting with an absolute file path, I want to obtain the following information: The mount point of the filesystem on which the file is stored (in order to compute the path relative to the mount point) The UUID and label of the file system The type (or vendor name) and the serial number of the hard drive that contains the partition I am aware that 2 and 3 may be undefined in many cases (e.g. for loopback, ramfs, encyrpted devices), which is totally fine. I also know how to obtain that information using a shell and system tools like df and the /sys or /proc filesystem. See this question for

I created two new syscalls, but when I try to test them I get the following error: matt@ubuntu:~/test$ gcc test.c test.c: In function ‘newcall’: test.c:6:17: error: ‘sys_get_slob_amnt_free’ undeclared (first use in this function) test.c:6:17: note: each undeclared identifier is reported only once for each function it appears in matt@ubuntu:~/test$ I also tried this with syscall(sys_get_slob_amnt_free) with the same result. Here is the test code: #include <unistd.h> #include <stdio.h> unsigned long newcall() { return syscall(__NR_get_slob_amnt_free); } int main() { printf("%d\n", newcall());

Does anyone tell me how to block some specific system calls within a program, please? I am building a system which takes a piece of C source code, compiles it with gcc and runs it. For security reasons, I need to prevent the compiled program from calling some system calls. Is there any way to do it, from the source code level (e.g. stripping the header files of gcc, detecting malicious external calls, ...) to the executable level? Edited #1: Add details about malicious calls. Edited #2: My system is a GNU/Linux one. Edited #3: I have tried some methods within a few days and here are the

I'm learning asm on Linux (noobuntu 10.04) I got the following code off of: http://asm.sourceforge.net/intro/hello.html section .text global _start ;must be declared for linker (ld) _start: ;tell linker entry point mov edx,len ;message length mov ecx,msg ;message to write mov ebx,1 ;file descriptor (stdout) mov eax,4 ;system call number (sys_write) int 0x80 ;call kernel mov eax,1 ;system call number (sys_exit) int 0x80 ;call kernel section .data msg db 'Hello, world!',0xa ;our dear string len equ $ - msg ;length of our dear string It's a simple hello world. Runs on Linux + calls the kernel

I have VB.NET app that communicates with some external server (maintains login sessions via Intranet), and I want to listen for Sleep/Hibernate events such that when it happens, I want to logout an existing session system before computer goes to sleep, while my app will remain running in the background but won't do anything. And vice versa, when computer is resumed from Hibernate or Woke up from sleep, I want to immediately login to the server. How can I grab those events and execute my code? I believe this relates to Win32 API which I'm supposed to use in VB. Thanks. If your application is