82a9e92b64
Change-Id: I461abfda8b7297c1bd04f1090f8d58fa96364616 Reviewed-on: https://galileo.mailstation.de/gerrit/1892 Reviewed-by: Saleem Abdulrasool <compnerd@compnerd.org> Reviewed-by: Kylie McClain <somasis@exherbo.org>
137 lines
3.4 KiB
C++
137 lines
3.4 KiB
C++
/* vim: set sw=4 sts=4 et foldmethod=syntax : */
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/*
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* Copyright (c) 2006, 2007, 2008, 2009, 2010 Ciaran McCreesh
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*
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* This file is part of the Paludis package manager. Paludis is free software;
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* you can redistribute it and/or modify it under the terms of the GNU General
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* Public License version 2, as published by the Free Software Foundation.
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*
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* Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <cstdlib>
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#include <paludis/util/system.hh>
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#include <paludis/util/log.hh>
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#include <paludis/util/stringify.hh>
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#include <paludis/util/destringify.hh>
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#include <paludis/util/pipe.hh>
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#include <paludis/util/pty.hh>
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#include <sys/utsname.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <grp.h>
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#include <pwd.h>
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#include <signal.h>
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#include <fcntl.h>
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#include "config.h"
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using namespace paludis;
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namespace
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{
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pid_t get_paludis_pid()
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{
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pid_t result(0);
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std::string str;
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if (((str = getenv_with_default("PALUDIS_PID", ""))).empty())
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{
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result = getpid();
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setenv("PALUDIS_PID", stringify(result).c_str(), 1);
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}
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else
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result = destringify<pid_t>(str);
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return result;
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}
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static pid_t paludis_pid PALUDIS_ATTRIBUTE((used)) = get_paludis_pid();
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}
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GetenvError::GetenvError(const std::string & key) noexcept :
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Exception("Environment variable '" + key + "' not set")
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{
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}
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std::string
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paludis::getenv_with_default(const std::string & key, const std::string & def)
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{
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const char * const e(std::getenv(key.c_str()));
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return e ? e : def;
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}
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std::string
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paludis::getenv_or_error(const std::string & key)
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{
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const char * const e(std::getenv(key.c_str()));
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if (! e)
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throw GetenvError(key);
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return e;
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}
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namespace
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{
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/**
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* Fetch the kernel version, for paludis::kernel_version.
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*
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* \ingroup grpsystem
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*/
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std::string get_kernel_version()
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{
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struct utsname u;
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if (0 != uname(&u))
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throw InternalError(PALUDIS_HERE, "uname call failed");
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return u.release;
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}
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}
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std::string
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paludis::kernel_version()
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{
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static const std::string result(get_kernel_version());
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return result;
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}
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std::string
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paludis::get_user_name(const uid_t u)
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{
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const struct passwd * const p(getpwuid(u));
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if (p)
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return stringify(p->pw_name);
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else
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{
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Context c("When getting user name for uid '" + stringify(u) + "':");
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Log::get_instance()->message("util.system.getpwuid", ll_warning, lc_context) <<
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"getpwuid(" << u << ") returned null";
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return stringify(u);
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}
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}
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std::string
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paludis::get_group_name(const gid_t u)
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{
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const struct group * const p(getgrgid(u));
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if (p)
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return stringify(p->gr_name);
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else
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{
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Context c("When getting group name for gid '" + stringify(u) + "':");
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Log::get_instance()->message("util.system.getgrgid", ll_warning, lc_context) <<
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"getgrgid(" << u << + ") returned null";
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return stringify(u);
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}
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}
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