C++ (Cpp) get_statm Examples

Example #1

File: array.c Project: liexusong/linux2.0-comment

static int get_process_array(char * page, int pid, int type)
{
    switch (type) {
    case PROC_PID_STATUS:
        return get_status(pid, page);
    case PROC_PID_ENVIRON:
        return get_env(pid, page);
    case PROC_PID_CMDLINE:
        return get_arg(pid, page);
    case PROC_PID_STAT:
        return get_stat(pid, page);
    case PROC_PID_STATM:
        return get_statm(pid, page);
    }
    return -EBADF;
}

Example #2

File: array.c Project: DreamLiMu/Linux-Kernel-Study

static int array_read(struct inode * inode, struct file * file,char * buf, int count)
{
	char * page;
	int length;
	int end;
	unsigned int type, pid;

	if (count < 0)
		return -EINVAL;
	if (!(page = (char*) __get_free_page(GFP_KERNEL)))
		return -ENOMEM;
	type = inode->i_ino;
	pid = type >> 16;
	type &= 0x0000ffff;
	switch (type) {
		case 2:
			length = get_loadavg(page);
			break;
		case 3:
			length = get_uptime(page);
			break;
		case 4:
			length = get_meminfo(page);
			break;
		case 6:
			length = get_version(page);
			break;
		case 9:
			length = get_env(pid, page);
			break;
		case 10:
			length = get_arg(pid, page);
			break;
		case 11:
			length = get_stat(pid, page);
			break;
		case 12:
			length = get_statm(pid, page);
			break;
#ifdef CONFIG_DEBUG_MALLOC
		case 13:
			length = get_malloc(page);
			break;
#endif
		case 14:
			free_page((unsigned long) page);
			return read_core(inode, file, buf, count);
		case 15:
			length = get_maps(pid, page);
			break;
		case 16:
			length = get_module_list(page);
			break;
		case 17:
			length = get_kstat(page);
			break;
		default:
			free_page((unsigned long) page);
			return -EBADF;
	}
	if (file->f_pos >= length) {
		free_page((unsigned long) page);
		return 0;
	}
	if (count + file->f_pos > length)
		count = length - file->f_pos;
	end = count + file->f_pos;
	memcpy_tofs(buf, page + file->f_pos, count);
	free_page((unsigned long) page);
	file->f_pos = end;
	return count;
}