3rd-party/linux-kernel-module-cheat
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Anonymous inode!

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This commit is contained in:
Ciro Santilli
2017-06-13 09:44:29 +01:00
parent 1fb095f969
commit 1f1cf4b0bd
8 changed files with 149 additions and 7 deletions
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40
kernel_module/user/anonymous_inode.c Normal file
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@@ -0,0 +1,40 @@
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h> /* sleep */
#include "../anonymous_inode.h"
int main(int argc, char **argv)
{
char buf[1024];
int fd_ioctl, fd_ioctl_anon, ret;
if (argc < 2) {
puts("Usage: ./prog <ioctl-file>");
return EXIT_FAILURE;
}
fd_ioctl = open(argv[1], O_RDONLY);
if (fd_ioctl == -1) {
perror("open");
return EXIT_FAILURE;
}
ret = ioctl(fd_ioctl, LKMC_ANONYMOUS_INODE_GET_FD, &fd_ioctl_anon);
if (ret == -1) {
perror("ioctl");
return EXIT_FAILURE;
}
ret = read(fd_ioctl_anon, buf, sizeof(buf));
printf("%.*s\n", ret, buf);
sleep(1);
ret = read(fd_ioctl_anon, buf, sizeof(buf));
printf("%.*s\n", ret, buf);
close(fd_ioctl_anon);
close(fd_ioctl);
return EXIT_SUCCESS;
}

4
kernel_module/user/ioctl.c
View File

@@ -15,8 +15,8 @@ int main(int argc, char **argv)
int fd, arg_int, ret;
lkmc_ioctl_struct arg_struct;
if (argc < 4) {
puts("Usage: ./prog <ioctl-file> <cmd> <arg>");
if (argc < 2) {
puts("Usage: ./prog <ioctl-file>");
return EXIT_FAILURE;
}
fd = open(argv[1], O_RDONLY);