diff options
Diffstat (limited to 'apt-pkg/contrib/fileutl.cc')
| -rw-r--r-- | apt-pkg/contrib/fileutl.cc | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc index a6af27b00..1be782bac 100644 --- a/apt-pkg/contrib/fileutl.cc +++ b/apt-pkg/contrib/fileutl.cc @@ -2252,22 +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]; |