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lxclock: fall back to /tmp if xdg_rundir is not writeable

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This happens for instance if you run a test under sudo which
then runs lxc commands under 'su - <someuser>'

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
This commit is contained in:
Serge Hallyn 2014-01-06 23:39:02 -06:00 committed by Stéphane Graber
parent 38d626f8be
commit 8c9c2c6d74
1 changed files with 20 additions and 4 deletions
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18
src/lxc/lxclock.c
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@ -121,11 +121,27 @@ static char *lxclock_name(const char *p, const char *n)
} }
ret = mkdir_p(dest, 0755); ret = mkdir_p(dest, 0755);
if (ret < 0) { if (ret < 0) {
/* fall back to "/tmp/" $(id -u) "/lxc/" $lxcpath / $lxcname + '\0' */
int l2 = 33 + strlen(n) + strlen(p);
char *d;
if (l2 > len) {
d = realloc(dest, l2);
if (!d) {
free(dest); free(dest);
return NULL; return NULL;
} }
len = l2;
}
dest = d;
ret = snprintf(dest, len, "/tmp/%d/lxc/%s", geteuid(), p);
if (ret < 0 || ret >= len) {
free(dest);
return NULL;
}
ret = snprintf(dest, len, "/tmp/%d/lxc/%s/%s", geteuid(), p, n);
} else
ret = snprintf(dest, len, "%s/lock/lxc/%s/%s", rundir, p, n); ret = snprintf(dest, len, "%s/lock/lxc/%s/%s", rundir, p, n);
if (ret < 0 || ret >= len) { if (ret < 0 || ret >= len) {
free(dest); free(dest);
return NULL; return NULL;