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7c673cae FG |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2004-2012 Inktank | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include "include/compat.h" | |
7c673cae FG |
16 | #include "debug.h" |
17 | #include "errno.h" | |
18 | ||
19 | void dump_open_fds(CephContext *cct) | |
20 | { | |
21 | const char *fn = PROCPREFIX "/proc/self/fd"; | |
22 | DIR *d = opendir(fn); | |
23 | if (!d) { | |
24 | lderr(cct) << "dump_open_fds unable to open " << fn << dendl; | |
25 | return; | |
26 | } | |
27 | struct dirent *de = nullptr; | |
28 | ||
29 | int n = 0; | |
30 | while ((de = ::readdir(d))) { | |
31 | if (de->d_name[0] == '.') | |
32 | continue; | |
33 | char path[PATH_MAX]; | |
34 | snprintf(path, sizeof(path), "%s/%s", fn, de->d_name); | |
35 | char target[PATH_MAX]; | |
36 | ssize_t r = readlink(path, target, sizeof(target) - 1); | |
37 | if (r < 0) { | |
38 | r = -errno; | |
39 | lderr(cct) << "dump_open_fds unable to readlink " << path << ": " << cpp_strerror(r) << dendl; | |
40 | continue; | |
41 | } | |
42 | target[r] = 0; | |
43 | lderr(cct) << "dump_open_fds " << de->d_name << " -> " << target << dendl; | |
44 | n++; | |
45 | } | |
46 | lderr(cct) << "dump_open_fds dumped " << n << " open files" << dendl; | |
47 | ||
48 | closedir(d); | |
49 | } |