vlc log

/***************************************************************************** * logger.c : file logging plugin for vlc ***************************************************************************** * Copyright (C) 2002 VideoLAN * $Id: logger.c,v 1.9 2003/11/05 00:39:16 gbazin Exp $ * * Authors: Samuel Hocevar * * 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 /* malloc(), free() */ #include #include /* ENOMEM */ #include #include #include #define MODE_TEXT 0 #define MODE_HTML 1 #define LOG_FILE "vlc-log.txt" #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 \ "\n" \ " \n" \ " vlc log\n" \ " \n" \ " \n" \ "

\n" \
    "      -- logger module started --\n"
#define HTML_FOOTER \
    "      -- logger module stopped --\n" \
    "

\n" \ " \n" \ "\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"), N_("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(); add_category_hint( N_("Miscellaneous"), NULL, VLC_FALSE ); 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_description( _("file logging interface") ); 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 plugin...") ); /* 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 ) { switch( p_intf->p_sys->i_mode ) { case MODE_HTML: psz_file = strdup( "vlc-log.html" ); break; case MODE_TEXT: default: psz_file = strdup( "vlc-log.txt" ); break; } 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] = { "", "", "", "" }; 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( "\n", p_file ); }