libnl  3.5.0
nl-list-sockets.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * nl-list-sockets.c Pretty-print /proc/net/netlink
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation version 2.1
8  * of the License.
9  *
10  * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
11  */
12 
13 #include <netlink/cli/utils.h>
14 
15 #define PROC_NETLINK "/proc/net/netlink"
16 
17 int main(int argc, char *argv[])
18 {
19  FILE *fd;
20  char buf[2048], p[64];
21 
22  fd = fopen(PROC_NETLINK, "re");
23  if (fd == NULL) {
24  perror("fopen");
25  return -1;
26  }
27 
28  printf("Address Family PID Groups rmem "
29  "wmem CB refcnt\n");
30 
31  while (fgets(buf, sizeof(buf), fd)) {
32  unsigned long sk, cb;
33  int ret, proto, pid, rmem, wmem, refcnt;
34  unsigned int groups;
35 
36  ret = sscanf(buf, "%lx %d %d %08x %d %d %lx %d\n",
37  &sk, &proto, &pid, &groups, &rmem, &wmem,
38  &cb, &refcnt);
39  if (ret != 8)
40  continue;
41 
42  printf("0x%016lx %-16s %-6d %08x %-6d %-6d 0x%08lx %d\n",
43  sk, nl_nlfamily2str(proto, p, sizeof(p)), pid,
44  groups, rmem, wmem, cb, refcnt);
45  }
46 
47  fclose(fd);
48 
49  return 0;
50 }