set program gid (not just egid) the way mailman likes it

1 files changed, 53 insertions, 0 deletions

diff --git a/tools/wripper.c b/tools/wripper.c
new file mode 100644
index 0000000..2a19c8b
--- /dev/null
+++ b/tools/wripper.c
@@ -0,0 +1,53 @@
+//////////////
+
+using namespace std;
+#include <iostream>
+#include <string>
+#include <unistd.h>
+#include <sys/types.h>
+#include <stdio.h>              /* for perror() */
+
+string dirname(const string path){
+  size_t where = path.rfind("/");
+  if (where == string::npos) return ".";
+  return path.substr(0, where);
+}
+
+int main(int argc, char** argv){
+  int uid=getuid();
+  int euid=geteuid();
+  int gid=getgid();
+  int egid=getegid();
+  int sts;
+  int verbosity(0);
+
+  if (verbosity) cout << "uid: " << uid
+        << "  euid: " << euid
+        << "  gid: " << gid
+        << "  egid: " << egid
+        << endl;
+
+  sts = setreuid(euid, euid);
+  if (sts){
+     cerr << "wripper: setreuid failed: ";
+     perror(0);
+  }
+
+  sts = setregid(egid, egid);
+  if (sts){
+     cerr << "wripper: setregid failed: ";
+     perror(0);
+  }
+
+  if (verbosity) cout << "uid: " << getuid()
+        << "  euid: " << geteuid()
+        << "  gid: " << getgid()
+        << "  egid: " << getegid()
+        << endl;
+  
+  string path = dirname(*argv) + "/mailman";
+  *argv = (char*) path.c_str();
+  execv(*argv, argv);
+  cerr << "wripper: exec failed for '" << *argv << "' : ";
+  perror(0);
+}