file.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:25k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * file.c: configuration file handling
- *****************************************************************************
- * Copyright (C) 2001-2007 the VideoLAN team
- * $Id: 58a8d520036bd0e22a67c8905fc504a46eb88db2 $
- *
- * Authors: Gildas Bazin <gbazin@videolan.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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include "../libvlc.h"
- #include "vlc_charset.h"
- #include "vlc_keys.h"
- #include <errno.h> /* errno */
- #include <assert.h>
- #include <limits.h>
- #include <fcntl.h>
- #include <sys/stat.h>
- #ifdef __APPLE__
- # include <xlocale.h>
- #elif defined(HAVE_USELOCALE)
- #include <locale.h>
- #endif
- #include "configuration.h"
- #include "modules/modules.h"
- static char *ConfigKeyToString( int );
- static inline char *strdupnull (const char *src)
- {
- return src ? strdup (src) : NULL;
- }
- /**
- * Get the user's configuration file
- */
- static char *config_GetConfigFile( vlc_object_t *obj )
- {
- char *psz_file = config_GetPsz( obj, "config" );
- if( psz_file == NULL )
- {
- char *psz_dir = config_GetUserConfDir();
- if( asprintf( &psz_file, "%s" DIR_SEP CONFIG_FILE, psz_dir ) == -1 )
- psz_file = NULL;
- free( psz_dir );
- }
- return psz_file;
- }
- static FILE *config_OpenConfigFile( vlc_object_t *p_obj )
- {
- char *psz_filename = config_GetConfigFile( p_obj );
- if( psz_filename == NULL )
- return NULL;
- msg_Dbg( p_obj, "opening config file (%s)", psz_filename );
- FILE *p_stream = utf8_fopen( psz_filename, "rt" );
- if( p_stream == NULL && errno != ENOENT )
- {
- msg_Err( p_obj, "cannot open config file (%s): %m",
- psz_filename );
- }
- #if !( defined(WIN32) || defined(__APPLE__) || defined(SYS_BEOS) )
- else if( p_stream == NULL && errno == ENOENT )
- {
- /* This is the fallback for pre XDG Base Directory
- * Specification configs */
- char *psz_old;
- if( asprintf( &psz_old, "%s" DIR_SEP CONFIG_DIR DIR_SEP CONFIG_FILE,
- config_GetHomeDir() ) != -1 )
- {
- p_stream = utf8_fopen( psz_old, "rt" );
- if( p_stream )
- {
- /* Old config file found. We want to write it at the
- * new location now. */
- msg_Info( p_obj->p_libvlc, "Found old config file at %s. "
- "VLC will now use %s.", psz_old, psz_filename );
- char *psz_readme;
- if( asprintf(&psz_readme,"%s"DIR_SEP CONFIG_DIR DIR_SEP"README",
- config_GetHomeDir() ) != -1 )
- {
- FILE *p_readme = utf8_fopen( psz_readme, "wt" );
- if( p_readme )
- {
- fprintf( p_readme, "The VLC media player "
- "configuration folder has moved to complyn"
- "with the XDG Base Directory Specification "
- "version 0.6. Yournconfiguration has been "
- "copied to the new location:n%snYou can "
- "delete this directory and all its contents.",
- psz_filename);
- fclose( p_readme );
- }
- free( psz_readme );
- }
- /* Remove the old configuration file so that --reset-config
- * can work properly. */
- unlink( psz_old );
- }
- free( psz_old );
- }
- }
- #endif
- free( psz_filename );
- return p_stream;
- }
- static int strtoi (const char *str)
- {
- char *end;
- long l;
- errno = 0;
- l = strtol (str, &end, 0);
- if (!errno)
- {
- if ((l > INT_MAX) || (l < INT_MIN))
- errno = ERANGE;
- if (*end)
- errno = EINVAL;
- }
- return (int)l;
- }
- /*****************************************************************************
- * config_LoadConfigFile: loads the configuration file.
- *****************************************************************************
- * This function is called to load the config options stored in the config
- * file.
- *****************************************************************************/
- int __config_LoadConfigFile( vlc_object_t *p_this, const char *psz_module_name )
- {
- FILE *file;
- file = config_OpenConfigFile (p_this);
- if (file == NULL)
- return VLC_EGENERIC;
- /* Look for the selected module, if NULL then save everything */
- module_t **list = module_list_get (NULL);
- /* Look for UTF-8 Byte Order Mark */
- char * (*convert) (const char *) = strdupnull;
- char bom[3];
- if ((fread (bom, 1, 3, file) != 3)
- || memcmp (bom, "xEFxBBxBF", 3))
- {
- convert = FromLocaleDup;
- rewind (file); /* no BOM, rewind */
- }
- module_t *module = NULL;
- char line[1024], section[1022];
- section[0] = ' ';
- /* Ensure consistent number formatting... */
- locale_t loc = newlocale (LC_NUMERIC_MASK, "C", NULL);
- locale_t baseloc = uselocale (loc);
- while (fgets (line, 1024, file) != NULL)
- {
- /* Ignore comments and empty lines */
- switch (line[0])
- {
- case '#':
- case 'n':
- case ' ':
- continue;
- }
- if (line[0] == '[')
- {
- char *ptr = strchr (line, ']');
- if (ptr == NULL)
- continue; /* syntax error; */
- *ptr = ' ';
- /* New section ( = a given module) */
- strcpy (section, line + 1);
- module = NULL;
- if ((psz_module_name == NULL)
- || (strcmp (psz_module_name, section) == 0))
- {
- for (int i = 0; list[i]; i++)
- {
- module_t *m = list[i];
- if ((strcmp (section, m->psz_object_name) == 0)
- && (m->i_config_items > 0)) /* ignore config-less modules */
- {
- module = m;
- if (psz_module_name != NULL)
- msg_Dbg (p_this,
- "loading config for module "%s"",
- section);
- break;
- }
- }
- }
- continue;
- }
- if (module == NULL)
- continue; /* no need to parse if there is no matching module */
- char *ptr = strchr (line, 'n');
- if (ptr != NULL)
- *ptr = ' ';
- /* look for option name */
- const char *psz_option_name = line;
- ptr = strchr (line, '=');
- if (ptr == NULL)
- continue; /* syntax error */
- *ptr = ' ';
- const char *psz_option_value = ptr + 1;
- /* try to match this option with one of the module's options */
- for (size_t i = 0; i < module->confsize; i++)
- {
- module_config_t *p_item = module->p_config + i;
- if ((p_item->i_type & CONFIG_HINT)
- || strcmp (p_item->psz_name, psz_option_name))
- continue;
- /* We found it */
- errno = 0;
- vlc_mutex_lock( p_item->p_lock );
- switch( p_item->i_type )
- {
- case CONFIG_ITEM_BOOL:
- case CONFIG_ITEM_INTEGER:
- {
- long l = strtoi (psz_option_value);
- if (errno)
- msg_Warn (p_this, "Integer value (%s) for %s: %m",
- psz_option_value, psz_option_name);
- else
- p_item->saved.i = p_item->value.i = (int)l;
- break;
- }
- case CONFIG_ITEM_FLOAT:
- if( !*psz_option_value )
- break; /* ignore empty option */
- p_item->value.f = (float)atof (psz_option_value);
- p_item->saved.f = p_item->value.f;
- break;
- case CONFIG_ITEM_KEY:
- if( !*psz_option_value )
- break; /* ignore empty option */
- p_item->value.i = ConfigStringToKey(psz_option_value);
- p_item->saved.i = p_item->value.i;
- break;
- default:
- /* free old string */
- free( (char*) p_item->value.psz );
- free( (char*) p_item->saved.psz );
- p_item->value.psz = convert (psz_option_value);
- p_item->saved.psz = strdupnull (p_item->value.psz);
- break;
- }
- vlc_mutex_unlock( p_item->p_lock );
- break;
- }
- }
- if (ferror (file))
- {
- msg_Err (p_this, "error reading configuration: %m");
- clearerr (file);
- }
- fclose (file);
- module_list_free (list);
- if (loc != (locale_t)0)
- {
- uselocale (baseloc);
- freelocale (loc);
- }
- return 0;
- }
- /*****************************************************************************
- * config_CreateDir: Create configuration directory if it doesn't exist.
- *****************************************************************************/
- int config_CreateDir( vlc_object_t *p_this, const char *psz_dirname )
- {
- if( !psz_dirname || !*psz_dirname ) return -1;
- if( utf8_mkdir( psz_dirname, 0700 ) == 0 )
- return 0;
- switch( errno )
- {
- case EEXIST:
- return 0;
- case ENOENT:
- {
- /* Let's try to create the parent directory */
- char psz_parent[strlen( psz_dirname ) + 1], *psz_end;
- strcpy( psz_parent, psz_dirname );
- psz_end = strrchr( psz_parent, DIR_SEP_CHAR );
- if( psz_end && psz_end != psz_parent )
- {
- *psz_end = ' ';
- if( config_CreateDir( p_this, psz_parent ) == 0 )
- {
- if( !utf8_mkdir( psz_dirname, 0700 ) )
- return 0;
- }
- }
- }
- }
- msg_Err( p_this, "could not create %s: %m", psz_dirname );
- return -1;
- }
- static int
- config_Write (FILE *file, const char *desc, const char *type,
- bool comment, const char *name, const char *fmt, ...)
- {
- va_list ap;
- int ret;
- if (desc == NULL)
- desc = "?";
- if (fprintf (file, "# %s (%s)n%s%s=", desc, vlc_gettext (type),
- comment ? "#" : "", name) < 0)
- return -1;
- va_start (ap, fmt);
- ret = vfprintf (file, fmt, ap);
- va_end (ap);
- if (ret < 0)
- return -1;
- if (fputs ("nn", file) == EOF)
- return -1;
- return 0;
- }
- static int config_PrepareDir (vlc_object_t *obj)
- {
- char *psz_configdir = config_GetUserConfDir ();
- if (psz_configdir == NULL) /* XXX: This should never happen */
- return -1;
- int ret = config_CreateDir (obj, psz_configdir);
- free (psz_configdir);
- return ret;
- }
- /*****************************************************************************
- * config_SaveConfigFile: Save a module's config options.
- *****************************************************************************
- * This will save the specified module's config options to the config file.
- * If psz_module_name is NULL then we save all the modules config options.
- * It's no use to save the config options that kept their default values, so
- * we'll try to be a bit clever here.
- *
- * When we save we mustn't delete the config options of the modules that
- * haven't been loaded. So we cannot just create a new config file with the
- * config structures we've got in memory.
- * I don't really know how to deal with this nicely, so I will use a completly
- * dumb method ;-)
- * I will load the config file in memory, but skipping all the sections of the
- * modules we want to save. Then I will create a brand new file, dump the file
- * loaded in memory and then append the sections of the modules we want to
- * save.
- * Really stupid no ?
- *****************************************************************************/
- static int SaveConfigFile( vlc_object_t *p_this, const char *psz_module_name,
- bool b_autosave )
- {
- module_t *p_parser;
- FILE *file = NULL;
- char *permanent = NULL, *temporary = NULL;
- char p_line[1024], *p_index2;
- unsigned long i_sizebuf = 0;
- char *p_bigbuffer = NULL, *p_index;
- bool b_backup;
- int i_index;
- if( config_PrepareDir( p_this ) )
- {
- msg_Err( p_this, "no configuration directory" );
- goto error;
- }
- file = config_OpenConfigFile( p_this );
- if( file != NULL )
- {
- struct stat st;
- /* Some users make vlcrc read-only to prevent changes.
- * The atomic replacement scheme breaks this "feature",
- * so we check for read-only by hand. */
- if (fstat (fileno (file), &st)
- || !(st.st_mode & S_IWUSR))
- {
- msg_Err (p_this, "configuration file is read-only");
- goto error;
- }
- i_sizebuf = ( st.st_size < LONG_MAX ) ? st.st_size : 0;
- }
- p_bigbuffer = p_index = malloc( i_sizebuf+1 );
- if( !p_bigbuffer )
- goto error;
- p_bigbuffer[0] = 0;
- /* List all available modules */
- module_t **list = module_list_get (NULL);
- /* backup file into memory, we only need to backup the sections we won't
- * save later on */
- b_backup = false;
- while( file && fgets( p_line, 1024, file ) )
- {
- if( (p_line[0] == '[') && (p_index2 = strchr(p_line,']')))
- {
- /* we found a section, check if we need to do a backup */
- for( i_index = 0; (p_parser = list[i_index]) != NULL; i_index++ )
- {
- if( ((p_index2 - &p_line[1])
- == (int)strlen(p_parser->psz_object_name) )
- && !memcmp( &p_line[1], p_parser->psz_object_name,
- strlen(p_parser->psz_object_name) ) )
- {
- if( !psz_module_name )
- break;
- else if( !strcmp( psz_module_name,
- p_parser->psz_object_name ) )
- break;
- }
- }
- if( list[i_index] == NULL )
- {
- /* we don't have this section in our list so we need to back
- * it up */
- *p_index2 = 0;
- #if 0
- msg_Dbg( p_this, "backing up config for unknown module "%s"",
- &p_line[1] );
- #endif
- *p_index2 = ']';
- b_backup = true;
- }
- else
- {
- b_backup = false;
- }
- }
- /* save line if requested and line is valid (doesn't begin with a
- * space, tab, or eol) */
- if( b_backup && (p_line[0] != 'n') && (p_line[0] != ' ')
- && (p_line[0] != 't') )
- {
- strcpy( p_index, p_line );
- p_index += strlen( p_line );
- }
- }
- if( file )
- fclose( file );
- file = NULL;
- /*
- * Save module config in file
- */
- permanent = config_GetConfigFile (p_this);
- if (!permanent)
- {
- module_list_free (list);
- goto error;
- }
- if (asprintf (&temporary, "%s.%u", permanent,
- #ifdef UNDER_CE
- GetCurrentProcessId ()
- #else
- getpid ()
- #endif
- ) == -1)
- {
- temporary = NULL;
- module_list_free (list);
- goto error;
- }
- /* The temporary configuration file is per-PID. Therefore SaveConfigFile()
- * should be serialized against itself within a given process. */
- static vlc_mutex_t lock = VLC_STATIC_MUTEX;
- vlc_mutex_lock (&lock);
- int fd = utf8_open (temporary, O_CREAT|O_WRONLY|O_TRUNC, S_IRUSR|S_IWUSR);
- if (fd == -1)
- {
- vlc_mutex_unlock (&lock);
- module_list_free (list);
- goto error;
- }
- file = fdopen (fd, "wt");
- if (file == NULL)
- {
- close (fd);
- vlc_mutex_unlock (&lock);
- module_list_free (list);
- goto error;
- }
- fprintf( file, "xEFxBBxBF###n### " COPYRIGHT_MESSAGE "n###nn"
- "###n### lines beginning with a '#' character are commentsn###nn" );
- /* Ensure consistent number formatting... */
- locale_t loc = newlocale (LC_NUMERIC_MASK, "C", NULL);
- locale_t baseloc = uselocale (loc);
- /* Look for the selected module, if NULL then save everything */
- for( i_index = 0; (p_parser = list[i_index]) != NULL; i_index++ )
- {
- module_config_t *p_item, *p_end;
- if( psz_module_name && strcmp( psz_module_name,
- p_parser->psz_object_name ) )
- continue;
- if( !p_parser->i_config_items )
- continue;
- if( psz_module_name )
- msg_Dbg( p_this, "saving config for module "%s"",
- p_parser->psz_object_name );
- fprintf( file, "[%s]", p_parser->psz_object_name );
- if( p_parser->psz_longname )
- fprintf( file, " # %snn", p_parser->psz_longname );
- else
- fprintf( file, "nn" );
- for( p_item = p_parser->p_config, p_end = p_item + p_parser->confsize;
- p_item < p_end;
- p_item++ )
- {
- if ((p_item->i_type & CONFIG_HINT) /* ignore hint */
- || p_item->b_removed /* ignore deprecated option */
- || p_item->b_unsaveable) /* ignore volatile option */
- continue;
- vlc_mutex_lock (p_item->p_lock);
- /* Do not save the new value in the configuration file
- * if doing an autosave, and the item is not an "autosaved" one. */
- bool b_retain = b_autosave && !p_item->b_autosave;
- if (IsConfigIntegerType (p_item->i_type))
- {
- int val = b_retain ? p_item->saved.i : p_item->value.i;
- if (p_item->i_type == CONFIG_ITEM_KEY)
- {
- char *psz_key = ConfigKeyToString (val);
- config_Write (file, p_item->psz_text, N_("key"),
- val == p_item->orig.i,
- p_item->psz_name, "%s",
- psz_key ? psz_key : "");
- free (psz_key);
- }
- else
- config_Write (file, p_item->psz_text,
- (p_item->i_type == CONFIG_ITEM_BOOL)
- ? N_("boolean") : N_("integer"),
- val == p_item->orig.i,
- p_item->psz_name, "%d", val);
- p_item->saved.i = val;
- }
- else
- if (IsConfigFloatType (p_item->i_type))
- {
- float val = b_retain ? p_item->saved.f : p_item->value.f;
- config_Write (file, p_item->psz_text, N_("float"),
- val == p_item->orig.f,
- p_item->psz_name, "%f", val);
- p_item->saved.f = val;
- }
- else
- {
- const char *psz_value = b_retain ? p_item->saved.psz
- : p_item->value.psz;
- bool modified;
- assert (IsConfigStringType (p_item->i_type));
- if (b_retain && (psz_value == NULL)) /* FIXME: hack */
- psz_value = p_item->orig.psz;
- modified =
- (psz_value != NULL)
- ? ((p_item->orig.psz != NULL)
- ? (strcmp (psz_value, p_item->orig.psz) != 0)
- : true)
- : (p_item->orig.psz != NULL);
- config_Write (file, p_item->psz_text, N_("string"),
- !modified, p_item->psz_name, "%s",
- psz_value ? psz_value : "");
- if ( !b_retain )
- {
- free ((char *)p_item->saved.psz);
- if( (psz_value && p_item->orig.psz &&
- strcmp( psz_value, p_item->orig.psz )) ||
- !psz_value || !p_item->orig.psz)
- p_item->saved.psz = strdupnull (psz_value);
- else
- p_item->saved.psz = NULL;
- }
- }
- if (!b_retain)
- p_item->b_dirty = false;
- vlc_mutex_unlock (p_item->p_lock);
- }
- }
- module_list_free (list);
- if (loc != (locale_t)0)
- {
- uselocale (baseloc);
- freelocale (loc);
- }
- /*
- * Restore old settings from the config in file
- */
- fputs( p_bigbuffer, file );
- free( p_bigbuffer );
- /*
- * Flush to disk and replace atomically
- */
- fflush (file); /* Flush from run-time */
- #ifndef WIN32
- fdatasync (fd); /* Flush from OS */
- /* Atomically replace the file... */
- if (utf8_rename (temporary, permanent))
- utf8_unlink (temporary);
- /* (...then synchronize the directory, err, TODO...) */
- /* ...and finally close the file */
- vlc_mutex_unlock (&lock);
- #endif
- fclose (file);
- #ifdef WIN32
- /* Windows cannot remove open files nor overwrite existing ones */
- utf8_unlink (permanent);
- if (utf8_rename (temporary, permanent))
- utf8_unlink (temporary);
- vlc_mutex_unlock (&lock);
- #endif
- free (temporary);
- free (permanent);
- return 0;
- error:
- if( file )
- fclose( file );
- free (temporary);
- free (permanent);
- free( p_bigbuffer );
- return -1;
- }
- int config_AutoSaveConfigFile( vlc_object_t *p_this )
- {
- size_t i_index;
- bool save = false;
- assert( p_this );
- /* Check if there's anything to save */
- module_t **list = module_list_get (NULL);
- for( i_index = 0; list[i_index] && !save; i_index++ )
- {
- module_t *p_parser = list[i_index];
- module_config_t *p_item, *p_end;
- if( !p_parser->i_config_items ) continue;
- for( p_item = p_parser->p_config, p_end = p_item + p_parser->confsize;
- p_item < p_end && !save;
- p_item++ )
- {
- vlc_mutex_lock (p_item->p_lock);
- save = p_item->b_autosave && p_item->b_dirty;
- vlc_mutex_unlock (p_item->p_lock);
- }
- }
- module_list_free (list);
- return save ? VLC_SUCCESS : SaveConfigFile( p_this, NULL, true );
- }
- int __config_SaveConfigFile( vlc_object_t *p_this, const char *psz_module_name )
- {
- return SaveConfigFile( p_this, psz_module_name, false );
- }
- int ConfigStringToKey( const char *psz_key )
- {
- int i_key = 0;
- unsigned int i;
- const char *psz_parser = strchr( psz_key, '-' );
- while( psz_parser && psz_parser != psz_key )
- {
- for( i = 0; i < sizeof(vlc_modifiers) / sizeof(key_descriptor_t); i++ )
- {
- if( !strncasecmp( vlc_modifiers[i].psz_key_string, psz_key,
- strlen( vlc_modifiers[i].psz_key_string ) ) )
- {
- i_key |= vlc_modifiers[i].i_key_code;
- }
- }
- psz_key = psz_parser + 1;
- psz_parser = strchr( psz_key, '-' );
- }
- for( i = 0; i < sizeof(vlc_keys) / sizeof( key_descriptor_t ); i++ )
- {
- if( !strcasecmp( vlc_keys[i].psz_key_string, psz_key ) )
- {
- i_key |= vlc_keys[i].i_key_code;
- break;
- }
- }
- return i_key;
- }
- char *ConfigKeyToString( int i_key )
- {
- char *psz_key = malloc( 100 );
- char *p;
- size_t index;
- if ( !psz_key )
- {
- return NULL;
- }
- *psz_key = ' ';
- p = psz_key;
- for( index = 0; index < (sizeof(vlc_modifiers) / sizeof(key_descriptor_t));
- index++ )
- {
- if( i_key & vlc_modifiers[index].i_key_code )
- {
- p += sprintf( p, "%s-", vlc_modifiers[index].psz_key_string );
- }
- }
- for( index = 0; index < (sizeof(vlc_keys) / sizeof( key_descriptor_t));
- index++)
- {
- if( (int)( i_key & ~KEY_MODIFIER ) == vlc_keys[index].i_key_code )
- {
- p += sprintf( p, "%s", vlc_keys[index].psz_key_string );
- break;
- }
- }
- return psz_key;
- }