diff options
Diffstat (limited to 'tools/testing/selftests/cgroup/cgroup_util.c')
| -rw-r--r-- | tools/testing/selftests/cgroup/cgroup_util.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c index 432db923bced..1e2d46636a0c 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.c +++ b/tools/testing/selftests/cgroup/cgroup_util.c @@ -141,6 +141,16 @@ long cg_read_long(const char *cgroup, const char *control) return atol(buf); } +long cg_read_long_fd(int fd) +{ + char buf[128]; + + if (pread(fd, buf, sizeof(buf), 0) <= 0) + return -1; + + return atol(buf); +} + long cg_read_key_long(const char *cgroup, const char *control, const char *key) { char buf[PAGE_SIZE]; @@ -183,6 +193,18 @@ int cg_write(const char *cgroup, const char *control, char *buf) return ret == len ? 0 : ret; } +/* + * Returns fd on success, or -1 on failure. + * (fd should be closed with close() as usual) + */ +int cg_open(const char *cgroup, const char *control, int flags) +{ + char path[PATH_MAX]; + + snprintf(path, sizeof(path), "%s/%s", cgroup, control); + return open(path, flags); +} + int cg_write_numeric(const char *cgroup, const char *control, long value) { char buf[64]; |