diff options
Diffstat (limited to 'apt-private/private-download.cc')
| -rw-r--r-- | apt-private/private-download.cc | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/apt-private/private-download.cc b/apt-private/private-download.cc index be7d23c31..3ded9e0b9 100644 --- a/apt-private/private-download.cc +++ b/apt-private/private-download.cc @@ -5,6 +5,7 @@ #include <apt-pkg/acquire-item.h> #include <apt-pkg/configuration.h> #include <apt-pkg/error.h> +#include <apt-pkg/fileutl.h> #include <apt-pkg/strutl.h> #include <apt-private/private-output.h> @@ -14,9 +15,56 @@ #include <string> #include <vector> +#include <unistd.h> +#include <sys/types.h> +#include <pwd.h> +#include <fcntl.h> + #include <apti18n.h> /*}}}*/ +bool CheckDropPrivsMustBeDisabled(pkgAcquire &Fetcher) /*{{{*/ +{ + // no need/possibility to drop privs + if(getuid() != 0) + return true; + + // the user does not want to drop privs + std::string SandboxUser = _config->Find("APT::Sandbox::User"); + if (SandboxUser.empty()) + return true; + + struct passwd const * const pw = getpwnam(SandboxUser.c_str()); + if (pw == NULL) + return true; + + if (seteuid(pw->pw_uid) != 0) + return _error->Errno("seteuid", "seteuid %u failed", pw->pw_uid); + + bool res = true; + // check if we can write to destfile + for (pkgAcquire::ItemIterator I = Fetcher.ItemsBegin(); + I != Fetcher.ItemsEnd() && res == true; ++I) + { + int fd = open((*I)->DestFile.c_str(), O_CREAT | O_RDWR, 0600); + if (fd < 0) + { + res = false; + std::string msg; + strprintf(msg, _("Can't drop privileges for downloading as file '%s' couldn't be accessed by user '%s'."), + (*I)->DestFile.c_str(), SandboxUser.c_str()); + c0out << msg << std::endl; + _config->Set("APT::Sandbox::User", ""); + } + close(fd); + } + + if (seteuid(0) != 0) + return _error->Errno("seteuid", "seteuid %u failed", 0); + + return res; +} + /*}}}*/ // CheckAuth - check if each download comes form a trusted source /*{{{*/ bool CheckAuth(pkgAcquire& Fetcher, bool const PromptUser) { @@ -31,7 +79,7 @@ bool CheckAuth(pkgAcquire& Fetcher, bool const PromptUser) return AuthPrompt(UntrustedList, PromptUser); } -bool AuthPrompt(std::string UntrustedList, bool const PromptUser) +bool AuthPrompt(std::string const &UntrustedList, bool const PromptUser) { ShowList(c2out,_("WARNING: The following packages cannot be authenticated!"),UntrustedList,""); |