api.c: add cgroup error string for ECGNOVERSIONCONVERT

Add the missing error string for the error code ECGNOVERSIONCONVERT to
cgroup_strerror_codes[], that is looked upon to print string version of
the error encountered.

Reproducer:
-----------
$ cat cgrp-strerr.c

int main(void)
{
        int err = ECGNOVERSIONCONVERT;

        fprintf(stderr, "%s\n", cgroup_strerror(err));

        return 0;
}

without the patch:
-----------------
$ ./cgrp-stderr
(null)

with the patch:
---------------
$ ./cgrp-stderr
Failed to convert from cgroup v1 to/from cgroup v2

Signed-off-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>

diff --git a/src/api.c b/src/api.c
index 42d3beb553ca8985dd494f25a3acfe5af3aee644..07d16f578de851ee4f047abfecc9249de5004a2c 100644 (file)
--- a/src/api.c
+++ b/src/api.c
@@ -128,6 +128,7 @@ const char * const cgroup_strerror_codes[] = {
        "This kernel does not support this feature",
        "Value setting does not succeed",
        "Failed to remove a non-empty group",
+       "Failed to convert from cgroup v1 to/from cgroup v2",
 };
 
 static const char * const cgroup_ignored_tasks_files[] = { "tasks", NULL };