mirror of https://github.com/tstack/lnav.git
123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
/**
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* Copyright (c) 2017, Timothy Stack
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*
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* All rights reserved.
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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 met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "lnav.hh"
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#include "auto_mem.hh"
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#include "lnav_log.hh"
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#include "sql_util.hh"
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#include "file_vtab.hh"
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#include "vtab_module.hh"
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using namespace std;
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struct lnav_file : public tvt_iterator_cursor<lnav_file> {
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using iterator = vector<logfile *>::iterator;
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static constexpr const char *CREATE_STMT = R"(
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-- Access lnav's open file list through this table.
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CREATE TABLE lnav_file (
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device integer,
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inode integer,
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filepath text,
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format text,
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lines integer
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);
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)";
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struct vtab {
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sqlite3_vtab base;
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operator sqlite3_vtab *() {
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return &this->base;
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};
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};
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iterator begin() {
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return lnav_data.ld_files.begin();
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}
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iterator end() {
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return lnav_data.ld_files.end();
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}
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int get_column(const cursor &vc, sqlite3_context *ctx, int col) {
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logfile *lf = *vc.iter;
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const struct stat &st = lf->get_stat();
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const string &name = lf->get_filename();
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log_format *format = lf->get_format();
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const char *format_name =
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format != nullptr ? format->get_name().get() : nullptr;
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switch (col) {
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case 0:
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sqlite3_result_int(ctx, st.st_dev);
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break;
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case 1:
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sqlite3_result_int(ctx, st.st_ino);
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break;
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case 2:
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sqlite3_result_text(ctx, name.c_str(), name.size(),
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SQLITE_TRANSIENT);
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break;
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case 3:
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if (format_name != nullptr) {
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sqlite3_result_text(ctx, format_name, -1, SQLITE_STATIC);
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} else {
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sqlite3_result_null(ctx);
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}
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break;
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case 4:
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sqlite3_result_int(ctx, lf->size());
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break;
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}
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return SQLITE_OK;
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}
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};
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int register_file_vtab(sqlite3 *db)
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{
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static vtab_module<tvt_no_update<lnav_file>> LNAV_FILE_MODULE;
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int rc;
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rc = LNAV_FILE_MODULE.create(db, "lnav_file");
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ensure(rc == SQLITE_OK);
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return rc;
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}
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