#include <jni.h>
#include <sys/types.h>
+
#include <unistd.h>
#ifndef _Included_org_cacert_natives_SetUID
}
JNIEXPORT jobject JNICALL Java_org_cacert_gigi_natives_SetUID_setUid
- (JNIEnv *env, jobject obj, jint uid, jint gid) {
+ (JNIEnv *env, jobject obj, jint uid_, jint gid_) {
/* We don't need the reference for the object/class we are working on */
(void)obj;
+ /* Fix uid and gid types */
+ uid_t uid = (uid_t)uid_;
+ if ((jint)uid != uid_) {
+ return getStatus(env, 0, "UID does not fit in uid_t type.");
+ }
+ gid_t gid = (gid_t)gid_;
+ if ((jint)gid != gid_) {
+ return getStatus(env, 0, "GID does not fit in gid_t type.");
+ }
- if(setgid((int)gid)) {
- return (jobject)getStatus(env, 0, "Error while setting GID.");
+ unsigned char work = 0;
+
+ if(getgid() != gid || getegid() != gid) {
+ if(setgid(gid)) {
+ return getStatus(env, 0, "Error while setting GID.");
+ }
+ work |= 1;
}
- if(setuid((int)uid)) {
- return (jobject)getStatus(env, 0, "Error while setting UID.");
+ if(getuid() != uid || geteuid() != uid) {
+ if(setuid(uid)) {
+ return getStatus(env, 0, "Error while setting UID.");
+ }
+ work |= 2;
}
- return (jobject)getStatus(env, 1, "Successfully set uid/gid.");
+ char *status;
+ switch (work) {
+ case 0: status = "UID and GID already set."; break;
+ case 1: status = "Successfully set GID (UID already set)."; break;
+ case 2: status = "Successfully set UID (GID already set)."; break;
+ case 3: status = "Successfully set UID and GID."; break;
+ default: return getStatus(env, 0, "Unexpected internal state.");
+ }
+ return getStatus(env, 1, status);
}
#ifdef __cplusplus