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give explicit error when the cgroup are not found

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When the cgroup is not mounted, we silently exit without giving
some clues to the user with what is happening.

Give some info and an explicit error.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
This commit is contained in:
Daniel Lezcano 2012-01-05 22:45:31 +01:00
parent 7ad84da79b
commit f0e64b8b66
1 changed files with 7 additions and 1 deletions
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8
src/lxc/cgroup.c
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@ -240,6 +240,7 @@ int lxc_cgroup_create(const char *name, pid_t pid)
struct mntent *mntent; struct mntent *mntent;
FILE *file = NULL; FILE *file = NULL;
int err = -1; int err = -1;
int found = 0;
file = setmntent(MTAB, "r"); file = setmntent(MTAB, "r");
if (!file) { if (!file) {
@ -253,13 +254,18 @@ int lxc_cgroup_create(const char *name, pid_t pid)
if (!strcmp(mntent->mnt_type, "cgroup")) { if (!strcmp(mntent->mnt_type, "cgroup")) {
INFO("found cgroup mounted at '%s'", mntent->mnt_dir); INFO("[%d] found cgroup mounted at '%s',opts='%s'",
++found, mntent->mnt_dir, mntent->mnt_opts);
err = lxc_one_cgroup_create(name, mntent, pid); err = lxc_one_cgroup_create(name, mntent, pid);
if (err) if (err)
goto out; goto out;
} }
}; };
if (!found)
ERROR("No cgroup mounted on the system");
out: out:
endmntent(file); endmntent(file);
return err; return err;