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https://github.com/matrix-construct/construct
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* To benefit from the precompiled-header (PCH) it MUST provide "the first C token." Advantages: Never worry about the include stack again. Remember, this means one less thing for random module developers, community people learning C++, and new developers to deal with. It should reduce the learning curve and barrier for participation. Disadvantages: Makes overall compilation a bit slower, especially without any additional work to improve it again. There are several opportunities, places where the PCH is probably being ignored, etc that can be addressed.
315 lines
7.4 KiB
C++
315 lines
7.4 KiB
C++
/*
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* ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd).
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* cache.c - code for caching files
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*
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* Copyright (C) 2003 Lee Hardy <lee@leeh.co.uk>
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* Copyright (C) 2003-2005 ircd-ratbox development team
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* Copyright (C) 2016 Charybdis development team
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* Copyright (C) 2016 Jason Volk <jason@zemos.net>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1.Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2.Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3.The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace cache = ircd::cache;
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using namespace cache;
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static size_t untabify(char *dest, const char *src, size_t destlen);
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struct cache::file
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{
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std::string filename;
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std::string shortname;
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std::ifstream stream;
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int flags;
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std::vector<std::string> contents;
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file(const char *const &filename, const char *const &shortname, const int &flags);
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file() = default;
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file &operator=(file &&) noexcept;
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};
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file motd::user;
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file motd::oper;
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dict help::oper;
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dict help::user;
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char motd::user_motd_changed[MAX_DATE_STRING];
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/* init_cache()
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*
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* inputs -
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* outputs -
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* side effects - inits the file/line cache blockheaps, loads motds
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*/
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void
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cache::init()
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{
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using namespace fs::path;
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motd::user = file(get(IRCD_MOTD), "ircd.motd", 0);
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motd::oper = file(get(IRCD_OMOTD), "opers.motd", 0);
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}
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/* load_help()
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*
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* inputs -
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* outputs -
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* side effects - old help cache deleted
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* - contents of help directories are loaded.
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*/
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void
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cache::help::load()
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{
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using namespace fs;
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oper.clear();
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user.clear();
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DIR *dir(opendir(path::get(path::OPERHELP)));
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if (!dir)
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return;
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struct dirent *ldirent(nullptr);
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while ((ldirent = readdir(dir)) != nullptr)
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{
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const auto &d_name(ldirent->d_name);
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if (d_name[0] == '.')
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continue;
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char filename[PATH_MAX];
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const auto &ophelp_path(path::get(path::OPERHELP));
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snprintf(filename, sizeof(filename), "%s%c%s", ophelp_path, RB_PATH_SEPARATOR, d_name);
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oper.emplace(d_name, std::make_shared<file>(filename, d_name, OPER));
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}
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closedir(dir);
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dir = opendir(path::get(path::USERHELP));
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if (dir == nullptr)
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return;
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while ((ldirent = readdir(dir)) != nullptr)
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{
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const auto &d_name(ldirent->d_name);
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if (d_name[0] == '.')
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continue;
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char filename[PATH_MAX];
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const auto &userhelp_path(path::get(path::USERHELP));
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snprintf(filename, sizeof(filename), "%s%c%s", userhelp_path, RB_PATH_SEPARATOR, d_name);
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#if defined(S_ISLNK) && defined(HAVE_LSTAT)
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struct stat sb;
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if (lstat(filename, &sb) < 0)
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continue;
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/* ok, if its a symlink, we work on the presumption if an
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* oper help exists of that name, its a symlink to that --fl
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*/
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if (S_ISLNK(sb.st_mode))
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{
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const auto it(oper.find(d_name));
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if (it != end(oper))
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{
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auto &file(it->second);
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file->flags |= USER;
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continue;
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}
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}
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#endif
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user.emplace(d_name, std::make_shared<file>(filename, d_name, USER));
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}
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closedir(dir);
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}
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void
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cache::motd::cache_user(void)
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{
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struct stat sb;
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const auto &path(fs::path::get(fs::path::IRCD_MOTD));
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if (stat(path, &sb) == 0)
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{
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struct tm *const local_tm(localtime(&sb.st_mtime));
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if (local_tm != nullptr)
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{
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snprintf(user_motd_changed, sizeof(user_motd_changed),
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"%d/%d/%d %d:%d",
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local_tm->tm_mday, local_tm->tm_mon + 1,
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1900 + local_tm->tm_year, local_tm->tm_hour,
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local_tm->tm_min);
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}
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}
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user = file(path, "ircd.motd", 0);
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}
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void
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cache::motd::cache_oper(void)
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{
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oper = cache::file(fs::path::get(fs::path::IRCD_OMOTD), "opers.motd", 0);
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}
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/* send_user_motd()
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*
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* inputs - client to send motd to
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* outputs - client is sent motd if exists, else ERR_NOMOTD
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* side effects -
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*/
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void
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cache::motd::send_user(Client *source_p)
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{
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const char *const myname(get_id(&me, source_p));
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const char *const nick(get_id(source_p, source_p));
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if (user.contents.empty())
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{
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sendto_one(source_p, form_str(ERR_NOMOTD), myname, nick);
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return;
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}
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sendto_one(source_p, form_str(RPL_MOTDSTART), myname, nick, me.name);
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for (const auto &it : user.contents)
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sendto_one(source_p, form_str(RPL_MOTD), myname, nick, it.c_str());
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sendto_one(source_p, form_str(RPL_ENDOFMOTD), myname, nick);
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}
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/* send_oper_motd()
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*
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* inputs - client to send motd to
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* outputs - client is sent oper motd if exists
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* side effects -
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*/
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void
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cache::motd::send_oper(Client *source_p)
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{
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if (oper.contents.empty())
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return;
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sendto_one(source_p, form_str(RPL_OMOTDSTART), me.name, source_p->name);
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for (const auto &it : motd::oper.contents)
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sendto_one(source_p, form_str(RPL_OMOTD), me.name, source_p->name, it.c_str());
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sendto_one(source_p, form_str(RPL_ENDOFOMOTD), me.name, source_p->name);
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}
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/* ircd::cache::file::file()
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*
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* inputs - file to cache, files "shortname", flags to set
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* outputs - none
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* side effects - cachefile.contents is populated with the lines from the file
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*/
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file::file(const char *const &filename,
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const char *const &shortname,
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const int &flags)
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:filename(filename)
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,shortname(shortname)
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,stream(filename)
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,flags(flags)
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,contents([this]
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{
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std::vector<std::string> contents;
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while (stream.good())
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{
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char line[BUFSIZE], *p;
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stream.getline(line, sizeof(line));
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if ((p = strpbrk(line, "\r\n")) != nullptr)
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*p = '\0';
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char untabline[BUFSIZE];
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untabify(untabline, line, sizeof(untabline));
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contents.emplace_back(untabline);
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}
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stream.close();
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return contents;
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}())
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{
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}
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file &file::operator=(file &&other)
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noexcept
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{
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filename = std::move(other.filename);
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shortname = std::move(other.shortname);
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flags = std::move(other.flags);
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contents = std::move(other.contents);
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return *this;
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}
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uint
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cache::flags(const file &file)
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{
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return file.flags;
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}
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const std::string &
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cache::name(const file &file)
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{
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return file.shortname;
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}
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const std::vector<std::string> &
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cache::contents(const file &file)
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{
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return file.contents;
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}
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/*
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* removes tabs from src, replaces with 8 spaces, and returns the length
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* of the new string. if the new string would be greater than destlen,
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* it is truncated to destlen - 1
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*/
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static size_t
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untabify(char *dest, const char *src, size_t destlen)
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{
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size_t x = 0, i;
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const char *s = src;
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char *d = dest;
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while(*s != '\0' && x < destlen - 1)
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{
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if(*s == '\t')
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{
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for(i = 0; i < 8 && x < destlen - 1; i++, x++, d++)
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*d = ' ';
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s++;
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} else
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{
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*d++ = *s++;
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x++;
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}
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}
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*d = '\0';
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return x;
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}
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