cleanup

[apt.git] / apt-pkg / contrib / fileutl.cc

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 4cc8112af9fb99366e28c45914b845b0a395483b..1be782bac8c4629dd7fc81e1f276189db107d701 100644 (file)
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -52,6 +52,7 @@
 
 #include <set>
 #include <algorithm>
+#include <memory>
 
 #ifdef HAVE_ZLIB
        #include <zlib.h>
@@ -159,7 +160,7 @@ bool CopyFile(FileFd &From,FileFd &To)
       return false;
    
    // Buffered copy between fds
-   SPtrArray<unsigned char> Buf = new unsigned char[64000];
+   std::unique_ptr<unsigned char[]> Buf(new unsigned char[64000]);
    unsigned long long Size = From.Size();
    while (Size != 0)
    {
@@ -167,8 +168,8 @@ bool CopyFile(FileFd &From,FileFd &To)
       if (Size > 64000)
         ToRead = 64000;
       
-      if (From.Read(Buf,ToRead) == false || 
-         To.Write(Buf,ToRead) == false)
+      if (From.Read(Buf.get(),ToRead) == false ||
+         To.Write(Buf.get(),ToRead) == false)
         return false;
       
       Size -= ToRead;
@@ -2251,22 +2252,32 @@ bool DropPrivileges()                                                   /*{{{*/
       return _error->Error("No user %s, can not drop rights", toUser.c_str());
 
    // Do not change the order here, it might break things
+   // Get rid of all our supplementary groups first
    if (setgroups(1, &pw->pw_gid))
       return _error->Errno("setgroups", "Failed to setgroups");
 
+   // Now change the group ids to the new user
+#ifdef HAVE_SETRESGID
+   if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) != 0)
+      return _error->Errno("setresgid", "Failed to set new group ids");
+#else
    if (setegid(pw->pw_gid) != 0)
       return _error->Errno("setegid", "Failed to setegid");
 
    if (setgid(pw->pw_gid) != 0)
       return _error->Errno("setgid", "Failed to setgid");
+#endif
 
+   // Change the user ids to the new user
+#ifdef HAVE_SETRESUID
+   if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) != 0)
+      return _error->Errno("setresuid", "Failed to set new user ids");
+#else
    if (setuid(pw->pw_uid) != 0)
       return _error->Errno("setuid", "Failed to setuid");
-
-   // the seteuid() is probably uneeded (at least thats what the linux
-   // man-page says about setuid(2)) but we cargo culted it anyway
    if (seteuid(pw->pw_uid) != 0)
       return _error->Errno("seteuid", "Failed to seteuid");
+#endif
 
    // Verify that the user has only a single group, and the correct one
    gid_t groups[1];