initgroups() call added when changing uid

1 files changed, 10 insertions, 7 deletions

diff --git a/src/process.cc b/src/process.cc
index fda35e8..bfab311 100644
--- a/src/process.cc
+++ b/src/process.cc
@@ -59,9 +59,11 @@ void process::check(const string& id,configuration& config) {
 
 void process::launch(const string& id,configuration& config) {
-    uid_t uid = 0;
+    uid_t uid = (uid_t)-1;
+    gid_t gid = (gid_t)-1;
     if(!user.empty()) {
 	struct passwd *ptmp = getpwnam(user.c_str());
 	if(ptmp) {
 	    uid = ptmp->pw_uid;
+	    gid = ptmp->pw_gid;
 	}else{
 	    errno=0;
@@ -71,5 +73,4 @@ void process::launch(const string& id,configuration& config) {
 	}
     }
-    gid_t gid = 0;
     if(!group.empty()) {
 	struct group *gtmp = getgrnam(group.c_str());
@@ -90,13 +91,15 @@ void process::launch(const string& id,configuration& config) {
 	try {
 	    setsid();
+	    if(user.empty()) {
+		if((getgid()!=gid) && setgid(gid))
+		    throw runtime_error(string(__PRETTY_FUNCTION__)+": failed to setgid()");
+	    }else{
+		if(initgroups(user.c_str(),gid))
+		    throw runtime_error(string(__PRETTY_FUNCTION__)+": failed to initgroups()");
+	    }
 	    if(!chroot.empty()) {
 		if(::chroot(chroot.c_str()))
 		    throw runtime_error(string(__PRETTY_FUNCTION__)+": failed to chroot()");
 	    }
-	    if(!group.empty()) {
-		// TODO: initgroups()?
-		if((getgid()!=gid) && setgid(gid))
-		    throw runtime_error(string(__PRETTY_FUNCTION__)+": failed to setgid()");
-	    }
 	    if(!user.empty()) {
 		if((getuid()!=uid) && setuid(uid))