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