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authorGiuseppe Scrivano <gscrivan@redhat.com>2019-05-23 22:28:38 +0200
committerGiuseppe Scrivano <gscrivan@redhat.com>2019-05-23 22:41:48 +0200
commit6df320c3910da5600a611f8aed783a499430a75c (patch)
treea82cece5a3ae0f1e9298991f68d247af030497b9 /pkg/rootless/rootless_linux.go
parent1dbb27365ac017a344f52e2cef3e4836b264cd4e (diff)
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rootless: store also the original GID in the host
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Diffstat (limited to 'pkg/rootless/rootless_linux.go')
-rw-r--r--pkg/rootless/rootless_linux.go20
1 files changed, 20 insertions, 0 deletions
diff --git a/pkg/rootless/rootless_linux.go b/pkg/rootless/rootless_linux.go
index ddf881368..9132c0fe5 100644
--- a/pkg/rootless/rootless_linux.go
+++ b/pkg/rootless/rootless_linux.go
@@ -25,6 +25,7 @@ import (
#cgo remoteclient CFLAGS: -DDISABLE_JOIN_SHORTCUT
#include <stdlib.h>
extern uid_t rootless_uid();
+extern uid_t rootless_gid();
extern int reexec_in_user_namespace(int ready, char *pause_pid_file_path);
extern int reexec_in_user_namespace_wait(int pid);
extern int reexec_userns_join(int userns, int mountns, char *pause_pid_file_path);
@@ -49,10 +50,12 @@ var (
func IsRootless() bool {
isRootlessOnce.Do(func() {
rootlessUIDInit := int(C.rootless_uid())
+ rootlessGIDInit := int(C.rootless_gid())
if rootlessUIDInit != 0 {
// This happens if we joined the user+mount namespace as part of
os.Setenv("_CONTAINERS_USERNS_CONFIGURED", "done")
os.Setenv("_CONTAINERS_ROOTLESS_UID", fmt.Sprintf("%d", rootlessUIDInit))
+ os.Setenv("_CONTAINERS_ROOTLESS_GID", fmt.Sprintf("%d", rootlessGIDInit))
}
isRootless = os.Geteuid() != 0 || os.Getenv("_CONTAINERS_USERNS_CONFIGURED") != ""
})
@@ -69,6 +72,23 @@ func GetRootlessUID() int {
return os.Geteuid()
}
+// GetRootlessGID returns the GID of the user in the parent userNS
+func GetRootlessGID() int {
+ gidEnv := os.Getenv("_CONTAINERS_ROOTLESS_GID")
+ if gidEnv != "" {
+ u, _ := strconv.Atoi(gidEnv)
+ return u
+ }
+
+ /* If the _CONTAINERS_ROOTLESS_UID is set, assume the gid==uid. */
+ uidEnv := os.Getenv("_CONTAINERS_ROOTLESS_UID")
+ if uidEnv != "" {
+ u, _ := strconv.Atoi(uidEnv)
+ return u
+ }
+ return os.Getegid()
+}
+
func tryMappingTool(tool string, pid int, hostID int, mappings []idtools.IDMap) error {
path, err := exec.LookPath(tool)
if err != nil {