📄 logger.c
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/***************************************************************************** * logger.c : file logging plugin for vlc ***************************************************************************** * Copyright (C) 2002 VideoLAN * $Id: logger.c 10781 2005-04-23 22:13:35Z zorglub $ * * Authors: Samuel Hocevar <sam@zoy.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. *****************************************************************************//***************************************************************************** * Preamble *****************************************************************************/#include <stdlib.h> /* malloc(), free() */#include <string.h>#include <errno.h> /* ENOMEM */#include <stdio.h>#ifdef UNDER_CE# define _IONBF 0x0004#endif#include <vlc/vlc.h>#include <vlc/intf.h>#define MODE_TEXT 0#define MODE_HTML 1#ifdef SYS_DARWIN#define LOG_DIR "Library/Logs/"#endif#define LOG_FILE_TEXT "vlc-log.txt"#define LOG_FILE_HTML "vlc-log.html"#define LOG_STRING( msg, file ) fwrite( msg, strlen( msg ), 1, file );#define TEXT_HEADER "-- logger module started --\n"#define TEXT_FOOTER "-- logger module stopped --\n"#define HTML_HEADER \ "<html>\n" \ " <head>\n" \ " <title>vlc log</title>\n" \ " </head>\n" \ " <body bgcolor=\"#000000\" text=\"#aaaaaa\">\n" \ " <pre>\n" \ " <b>-- logger module started --</b>\n"#define HTML_FOOTER \ " <b>-- logger module stopped --</b>\n" \ " </pre>\n" \ " </body>\n" \ "</html>\n"/***************************************************************************** * intf_sys_t: description and status of log interface *****************************************************************************/struct intf_sys_t{ int i_mode; FILE * p_file; /* The log file */ msg_subscription_t *p_sub;};/***************************************************************************** * Local prototypes *****************************************************************************/static int Open ( vlc_object_t * );static void Close ( vlc_object_t * );static void Run ( intf_thread_t * );static void FlushQueue ( msg_subscription_t *, FILE *, int );static void TextPrint ( const msg_item_t *, FILE * );static void HtmlPrint ( const msg_item_t *, FILE * );/***************************************************************************** * Module descriptor *****************************************************************************/static char *mode_list[] = { "text", "html" };static char *mode_list_text[] = { N_("Text"), "HTML" };#define LOGMODE_TEXT N_("Log format")#define LOGMODE_LONGTEXT N_("Specify the log format. Available choices are \"text\" (default) and \"html\".")vlc_module_begin(); set_category( CAT_INTERFACE ); set_subcategory( SUBCAT_INTERFACE_CONTROL ); set_shortname( N_( "Logging" ) ); set_description( _("File logging") ); add_file( "logfile", NULL, NULL, N_("Log filename"), N_("Specify the log filename."), VLC_FALSE ); add_string( "logmode", "text", NULL, LOGMODE_TEXT, LOGMODE_LONGTEXT, VLC_FALSE ); change_string_list( mode_list, mode_list_text, 0 ); set_capability( "interface", 0 ); set_callbacks( Open, Close );vlc_module_end();/***************************************************************************** * Open: initialize and create stuff *****************************************************************************/static int Open( vlc_object_t *p_this ){ intf_thread_t *p_intf = (intf_thread_t *)p_this; char *psz_mode, *psz_file; CONSOLE_INTRO_MSG; msg_Info( p_intf, "Using the logger interface module..." ); /* Allocate instance and initialize some members */ p_intf->p_sys = (intf_sys_t *)malloc( sizeof( intf_sys_t ) ); if( p_intf->p_sys == NULL ) { msg_Err( p_intf, "out of memory" ); return -1; } psz_mode = config_GetPsz( p_intf, "logmode" ); if( psz_mode ) { if( !strcmp( psz_mode, "text" ) ) { p_intf->p_sys->i_mode = MODE_TEXT; } else if( !strcmp( psz_mode, "html" ) ) { p_intf->p_sys->i_mode = MODE_HTML; } else { msg_Err( p_intf, "invalid log mode `%s', using `text'", psz_mode ); p_intf->p_sys->i_mode = MODE_TEXT; } free( psz_mode ); } else { msg_Warn( p_intf, "no log mode specified, using `text'" ); p_intf->p_sys->i_mode = MODE_TEXT; } psz_file = config_GetPsz( p_intf, "logfile" ); if( !psz_file ) {#ifdef SYS_DARWIN char *psz_homedir = p_this->p_vlc->psz_homedir; if( !psz_homedir ) { msg_Err( p_this, "psz_homedir is null" ); return -1; } psz_file = (char *)malloc( sizeof("/" LOG_DIR "/" LOG_FILE_HTML) + strlen(psz_homedir) ); if( psz_file ) { switch( p_intf->p_sys->i_mode ) { case MODE_HTML: sprintf( psz_file, "%s/" LOG_DIR "/" LOG_FILE_HTML, psz_homedir ); break; case MODE_TEXT: default: sprintf( psz_file, "%s/" LOG_DIR "/" LOG_FILE_TEXT, psz_homedir ); break; } }#else switch( p_intf->p_sys->i_mode ) { case MODE_HTML: psz_file = strdup( LOG_FILE_HTML ); break; case MODE_TEXT: default: psz_file = strdup( LOG_FILE_TEXT ); break; }#endif msg_Warn( p_intf, "no log filename provided, using `%s'", psz_file ); } /* Open the log file and remove any buffering for the stream */ msg_Dbg( p_intf, "opening logfile `%s'", psz_file ); p_intf->p_sys->p_file = fopen( psz_file, "wt" ); if( p_intf->p_sys->p_file == NULL ) { msg_Err( p_intf, "error opening logfile `%s'", psz_file ); free( p_intf->p_sys ); free( psz_file ); return -1; } setvbuf( p_intf->p_sys->p_file, NULL, _IONBF, 0 ); p_intf->p_sys->p_sub = msg_Subscribe( p_intf ); free( psz_file ); switch( p_intf->p_sys->i_mode ) { case MODE_HTML: LOG_STRING( HTML_HEADER, p_intf->p_sys->p_file ); break; case MODE_TEXT: default: LOG_STRING( TEXT_HEADER, p_intf->p_sys->p_file ); break; } p_intf->pf_run = Run; return 0;}/***************************************************************************** * Close: destroy interface stuff *****************************************************************************/static void Close( vlc_object_t *p_this ){ intf_thread_t *p_intf = (intf_thread_t *)p_this; /* Flush the queue and unsubscribe from the message queue */ FlushQueue( p_intf->p_sys->p_sub, p_intf->p_sys->p_file, p_intf->p_sys->i_mode ); msg_Unsubscribe( p_intf, p_intf->p_sys->p_sub ); switch( p_intf->p_sys->i_mode ) { case MODE_HTML: LOG_STRING( HTML_FOOTER, p_intf->p_sys->p_file ); break; case MODE_TEXT: default: LOG_STRING( TEXT_FOOTER, p_intf->p_sys->p_file ); break; } /* Close the log file */ fclose( p_intf->p_sys->p_file ); /* Destroy structure */ free( p_intf->p_sys );}/***************************************************************************** * Run: rc thread ***************************************************************************** * This part of the interface is in a separate thread so that we can call * exec() from within it without annoying the rest of the program. *****************************************************************************/static void Run( intf_thread_t *p_intf ){ while( !p_intf->b_die ) { FlushQueue( p_intf->p_sys->p_sub, p_intf->p_sys->p_file, p_intf->p_sys->i_mode ); msleep( INTF_IDLE_SLEEP ); }}/***************************************************************************** * FlushQueue: flush the message queue into the log file *****************************************************************************/static void FlushQueue( msg_subscription_t *p_sub, FILE *p_file, int i_mode ){ int i_start, i_stop; vlc_mutex_lock( p_sub->p_lock ); i_stop = *p_sub->pi_stop; vlc_mutex_unlock( p_sub->p_lock ); if( p_sub->i_start != i_stop ) { /* Append all messages to log file */ for( i_start = p_sub->i_start; i_start != i_stop; i_start = (i_start+1) % VLC_MSG_QSIZE ) { switch( i_mode ) { case MODE_HTML: HtmlPrint( &p_sub->p_msg[i_start], p_file ); break; case MODE_TEXT: default: TextPrint( &p_sub->p_msg[i_start], p_file ); break; } } vlc_mutex_lock( p_sub->p_lock ); p_sub->i_start = i_start; vlc_mutex_unlock( p_sub->p_lock ); }}static const char *ppsz_type[4] = { ": ", " error: ", " warning: ", " debug: " };static void TextPrint( const msg_item_t *p_msg, FILE *p_file ){ LOG_STRING( p_msg->psz_module, p_file ); LOG_STRING( ppsz_type[p_msg->i_type], p_file ); LOG_STRING( p_msg->psz_msg, p_file ); LOG_STRING( "\n", p_file );}static void HtmlPrint( const msg_item_t *p_msg, FILE *p_file ){ static const char *ppsz_color[4] = { "<font color=\"#ffffff\">", "<font color=\"#ff6666\">", "<font color=\"#ffff66\">", "<font color=\"#aaaaaa\">" }; LOG_STRING( p_msg->psz_module, p_file ); LOG_STRING( ppsz_type[p_msg->i_type], p_file ); LOG_STRING( ppsz_color[p_msg->i_type], p_file ); LOG_STRING( p_msg->psz_msg, p_file ); LOG_STRING( "</font>\n", p_file );}⌨️ 快捷键说明
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