Mercurial > archived > louis > perso > liblxcstats

comparison open.c @ 0:6ce4443e7545

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add the draft of an API to collect statistics on LXC
author Louis Opter <kalessin@kalessin.fr>
date Wed, 29 Dec 2010 23:28:14 +0100
parents
children 8339ab15527d
comparison
equal deleted inserted replaced
-1:000000000000 0:6ce4443e7545
1 #include <errno.h>
2 #include <stdbool.h>
3 #include <stdio.h>
4 #include <mntent.h>
5 #include <stdlib.h>
6 #include <string.h>
7
8 #include "_lxcstats.h"
9 #include "lxcstats.h"
10
11 static char *
12 lxcst_cgroup_mount_point(void)
13 {
14 FILE *mtab;
15 struct mntent mntbuf;
16 char strbuf[1024];
17 bool found = false;
18
19 mtab = fopen("/etc/mtab", "r");
20 if (!mtab)
21 return (NULL);
22
23 while (getmntent_r(mtab, &mntbuf, strbuf, sizeof(strbuf))) {
24 if (!strcmp(mntbuf.mnt_type, "cgroup")) {
25 found = true;
26 break ;
27 }
28 }
29
30 fclose(mtab);
31
32 if (found)
33 return (strdup(mntbuf.mnt_dir));
34
35 errno = ENOENT;
36 return (NULL);
37 }
38
39 lxcst_handle *lxcst_open(void)
40 {
41 struct _lxcst_controller *c;
42
43 c = calloc(1, sizeof(*c));
44 if (!c)
45 return (NULL);
46
47 c->cgroup_dir = lxcst_cgroup_mount_point();
48 if (!c->cgroup_dir)
49 goto free_controller;
50
51 return (c);
52
53 free_controller:
54 free(c);
55 return (NULL);
56 }