Drop Privileges to "Debian-apt" in most acquire methods

Add a new "Debian-apt" user that owns the /var/lib/apt/lists
and /var/cache/apt/archive directories. The methods
http, https, ftp, gpgv, gzip switch to this user when they
start.

Thanks to Julian and "ioerror" and tors "switch_id()" code.

1 files changed, 3 insertions, 1 deletions

diff --git a/methods/http_main.cc b/methods/http_main.cc
index 3b346a514..788582632 100644
--- a/methods/http_main.cc
+++ b/methods/http_main.cc
@@ -1,5 +1,5 @@
 #include <config.h>
-
+#include <apt-pkg/fileutl.h>
 #include <signal.h>
 
 #include "http.h"
@@ -12,6 +12,8 @@ int main()
    // closes the connection (this is dealt with via ServerDie())
    signal(SIGPIPE, SIG_IGN);
 
+   DropPrivs();
+
    HttpMethod Mth;
    return Mth.Loop();
 }