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-rw-r--r--apt-pkg/contrib/fileutl.cc17
-rw-r--r--apt-pkg/contrib/fileutl.h3
2 files changed, 20 insertions, 0 deletions
diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 1ba4674e5..da81edbcc 100644
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -47,6 +47,7 @@
#include <signal.h>
#include <errno.h>
#include <glob.h>
+#include <pwd.h>
#include <set>
#include <algorithm>
@@ -2050,3 +2051,19 @@ bool Rename(std::string From, std::string To)
}
return true;
}
+
+bool DropPrivs()
+{
+ if (getuid() != 0)
+ return true;
+
+ const std::string nobody = _config->Find("APT::User::Nobody", "nobody");
+ struct passwd *pw = getpwnam(nobody.c_str());
+ if (pw == NULL)
+ return _error->Warning("No user %s, can not drop rights", nobody.c_str());
+ if (setgid(pw->pw_gid) != 0)
+ return _error->Errno("setgid", "Failed to setgid");
+ if (setuid(pw->pw_uid) != 0)
+ return _error->Errno("setuid", "Failed to setuid");
+ return true;
+}
diff --git a/apt-pkg/contrib/fileutl.h b/apt-pkg/contrib/fileutl.h
index cc1a98eae..683c04157 100644
--- a/apt-pkg/contrib/fileutl.h
+++ b/apt-pkg/contrib/fileutl.h
@@ -191,6 +191,9 @@ pid_t ExecFork(std::set<int> keep_fds);
void MergeKeepFdsFromConfiguration(std::set<int> &keep_fds);
bool ExecWait(pid_t Pid,const char *Name,bool Reap = false);
+// process releated
+bool DropPrivs();
+
// File string manipulators
std::string flNotDir(std::string File);
std::string flNotFile(std::string File);