From: b <rowerynaksiezycu@gmail.com>
Date: Sat, 12 Nov 2022 20:24:35 +0000 (+0000)
Subject: correct SETUID handling
X-Git-Url: http://bicyclesonthemoon.info/git-projects/?a=commitdiff_plain;h=77358d32a0dc0037d0be40dc52a3bdc79fc269fb;p=botm%2Fgit

correct SETUID handling
---

diff --git a/exec.c b/exec.c
index c747a98..5094091 100644
--- a/exec.c
+++ b/exec.c
@@ -1,10 +1,20 @@
+// 12.11.2022
 #include <unistd.h>
+#include <errno.h>
 
 #define TARGET "###TARGET;"
 
 int main(int argc, char *argv[], char *envp[])
 {
+	uid_t euid;
+	gid_t egid;
 	int r;
+	euid = geteuid();
+	egid = getegid();
+	if ((r = setreuid(euid, euid)))
+		return (r = errno);
+	if ((r = setregid(egid, egid)))
+		return (r = errno);
 	r=execve(TARGET,argv,envp);
 	return r;
 }
diff --git a/makefile b/makefile
index f1a3a17..ec0c3ab 100644
--- a/makefile
+++ b/makefile
@@ -23,7 +23,7 @@ git-http-backend: git-http-backend.c
 
 cpbin: git-http-backend
 	$(MKDIR) -p $(OD)
-	$(CP) git-http-backend $(OD)
+	$(CP) -p git-http-backend $(OD)
 
 rmbin:
 	$rm -f $(OD)/git-http-backend