mirror of
https://github.com/rkd77/elinks.git
synced 2024-09-06 23:44:43 -04:00
837 lines
21 KiB
C
837 lines
21 KiB
C
/* Config file manipulation */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h> /* OS/2 needs this after sys/types.h */
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h> /* OS/2 needs this after sys/types.h */
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "elinks.h"
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#include "config/conf.h"
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#include "config/dialogs.h"
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#include "config/home.h"
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#include "config/kbdbind.h"
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#include "config/options.h"
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#include "config/opttypes.h"
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#include "intl/gettext/libintl.h"
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#include "osdep/osdep.h"
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#include "terminal/terminal.h"
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#include "util/error.h"
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#include "util/memory.h"
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#include "util/secsave.h"
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#include "util/string.h"
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/* Config file has only very simple grammar:
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*
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* /set *option *= *value/
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* /bind *keymap *keystroke *= *action/
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* /include *file/
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* /#.*$/
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*
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* Where option consists from any number of categories separated by dots and
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* name of the option itself. Both category and option name consists from
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* [a-zA-Z0-9_-*] - using uppercase letters is not recommended, though. '*' is
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* reserved and is used only as escape character in place of '.' originally in
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* option name.
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*
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* Value can consist from:
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* - number (it will be converted to int/long)
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* - enum (like on, off; true, fake, last_url; etc ;) - in planning state yet
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* - string - "blah blah" (keymap, keystroke and action and file looks like that too)
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*
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* "set" command is parsed first, and then type-specific function is called,
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* with option as one parameter and value as a second. Usually it just assigns
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* value to an option, but sometimes you may want to first create the option
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* ;). Then this will come handy. */
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/* Skip comments and whitespace,
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* setting *@line to the number of lines skipped. */
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static unsigned char *
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skip_white(unsigned char *start, int *line)
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{
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while (*start) {
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while (isspace(*start)) {
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if (*start == '\n') {
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(*line)++;
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}
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start++;
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}
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if (*start == '#') {
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start += strcspn(start, "\n");
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} else {
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return start;
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}
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}
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return start;
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}
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/* Parse a command. Returns error code. */
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/* If dynamic string credentials are supplied, we will mirror the command at
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* the end of the string; however, we won't load the option value to the tree,
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* and we will even write option value from the tree to the output string. We
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* will only possibly set OPT_WATERMARK flag to the option (if enabled). */
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static enum parse_error
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parse_set(struct option *opt_tree, unsigned char **file, int *line,
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struct string *mirror, int is_system_conf)
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{
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unsigned char *orig_pos = *file;
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unsigned char *optname;
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unsigned char bin;
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*file = skip_white(*file, line);
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if (!**file) return ERROR_PARSE;
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/* Option name */
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optname = *file;
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while (isident(**file) || **file == '*' || **file == '.' || **file == '+')
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(*file)++;
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bin = **file;
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**file = '\0';
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optname = stracpy(optname);
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if (!optname) return ERROR_NOMEM;
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**file = bin;
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*file = skip_white(*file, line);
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/* Equal sign */
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if (**file != '=') { mem_free(optname); return ERROR_PARSE; }
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(*file)++; /* '=' */
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*file = skip_white(*file, line);
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if (!**file) { mem_free(optname); return ERROR_VALUE; }
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/* Mirror what we already have */
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if (mirror) add_bytes_to_string(mirror, orig_pos, *file - orig_pos);
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/* Option value */
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{
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struct option *opt;
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unsigned char *val;
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opt = mirror ? get_opt_rec_real(opt_tree, optname) : get_opt_rec(opt_tree, optname);
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mem_free(optname);
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if (!opt || (opt->flags & OPT_HIDDEN))
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return ERROR_OPTION;
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if (!option_types[opt->type].read)
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return ERROR_VALUE;
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val = option_types[opt->type].read(opt, file, line);
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if (!val) return ERROR_VALUE;
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if (mirror) {
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if (opt->flags & OPT_DELETED)
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opt->flags &= ~OPT_WATERMARK;
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else
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opt->flags |= OPT_WATERMARK;
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if (option_types[opt->type].write) {
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option_types[opt->type].write(opt, mirror);
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}
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} else if (!option_types[opt->type].set
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|| !option_types[opt->type].set(opt, val)) {
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mem_free(val);
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return ERROR_VALUE;
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}
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/* This is not needed since this will be WATERMARK'd when
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* saving it. We won't need to save it as touched. */
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/* if (!str) opt->flags |= OPT_TOUCHED; */
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mem_free(val);
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}
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return ERROR_NONE;
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}
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static enum parse_error
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parse_unset(struct option *opt_tree, unsigned char **file, int *line,
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struct string *mirror, int is_system_conf)
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{
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unsigned char *orig_pos = *file;
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unsigned char *optname;
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unsigned char bin;
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/* XXX: This does not handle the autorewriting well and is mostly a
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* quick hack than anything now. --pasky */
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*file = skip_white(*file, line);
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if (!**file) return ERROR_PARSE;
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/* Option name */
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optname = *file;
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while (isident(**file) || **file == '*' || **file == '.' || **file == '+')
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(*file)++;
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bin = **file;
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**file = '\0';
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optname = stracpy(optname);
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if (!optname) return ERROR_NOMEM;
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**file = bin;
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/* Mirror what we have */
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if (mirror) add_bytes_to_string(mirror, orig_pos, *file - orig_pos);
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{
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struct option *opt;
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opt = get_opt_rec_real(opt_tree, optname);
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mem_free(optname);
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if (!opt || (opt->flags & OPT_HIDDEN))
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return ERROR_OPTION;
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if (!mirror) {
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if (opt->flags & OPT_ALLOC) delete_option(opt);
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} else {
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if (opt->flags & OPT_DELETED)
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opt->flags |= OPT_WATERMARK;
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else
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opt->flags &= ~OPT_WATERMARK;
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}
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}
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return ERROR_NONE;
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}
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static enum parse_error
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parse_bind(struct option *opt_tree, unsigned char **file, int *line,
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struct string *mirror, int is_system_conf)
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{
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unsigned char *orig_pos = *file, *next_pos;
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unsigned char *keymap, *keystroke, *action;
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enum parse_error err = ERROR_NONE;
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*file = skip_white(*file, line);
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if (!*file) return ERROR_PARSE;
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/* Keymap */
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keymap = option_types[OPT_STRING].read(NULL, file, line);
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*file = skip_white(*file, line);
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if (!keymap || !**file)
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return ERROR_OPTION;
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/* Keystroke */
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keystroke = option_types[OPT_STRING].read(NULL, file, line);
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*file = skip_white(*file, line);
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if (!keystroke || !**file) {
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mem_free(keymap);
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return ERROR_OPTION;
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}
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/* Equal sign */
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*file = skip_white(*file, line);
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if (**file != '=') {
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mem_free(keymap); mem_free(keystroke);
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return ERROR_PARSE;
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}
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(*file)++; /* '=' */
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*file = skip_white(*file, line);
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if (!**file) {
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mem_free(keymap); mem_free(keystroke);
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return ERROR_PARSE;
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}
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/* Action */
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next_pos = *file;
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action = option_types[OPT_STRING].read(NULL, file, line);
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if (!action) {
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mem_free(keymap);
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return ERROR_VALUE;
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}
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if (mirror) {
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/* Mirror what we already have */
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unsigned char *act_str = bind_act(keymap, keystroke);
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if (act_str) {
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add_bytes_to_string(mirror, orig_pos,
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next_pos - orig_pos);
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add_to_string(mirror, act_str);
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mem_free(act_str);
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} else {
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err = ERROR_VALUE;
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}
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} else {
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/* We don't bother to bind() if -default-keys. */
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if (!get_cmd_opt_bool("default-keys")
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&& bind_do(keymap, keystroke, action, is_system_conf)) {
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/* bind_do() tried but failed. */
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err = ERROR_VALUE;
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} else {
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err = ERROR_NONE;
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}
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}
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mem_free(keymap); mem_free(keystroke); mem_free(action);
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return err;
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}
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static int load_config_file(unsigned char *, unsigned char *, struct option *,
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struct string *, int);
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static enum parse_error
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parse_include(struct option *opt_tree, unsigned char **file, int *line,
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struct string *mirror, int is_system_conf)
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{
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unsigned char *orig_pos = *file;
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unsigned char *fname;
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struct string dumbstring;
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if (!init_string(&dumbstring)) return ERROR_NOMEM;
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*file = skip_white(*file, line);
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if (!*file) return ERROR_PARSE;
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/* File name */
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fname = option_types[OPT_STRING].read(NULL, file, line);
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if (!fname) {
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done_string(&dumbstring);
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return ERROR_VALUE;
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}
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/* Mirror what we already have */
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if (mirror) add_bytes_to_string(mirror, orig_pos, *file - orig_pos);
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/* We want load_config_file() to watermark stuff, but not to load
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* anything, polluting our beloved options tree - thus, we will feed it
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* with some dummy string which we will destroy later; still better
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* than cloning whole options tree or polluting interface with another
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* rarely-used option ;). */
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/* XXX: We should try CONFDIR/<file> when proceeding
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* CONFDIR/<otherfile> ;). --pasky */
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if (load_config_file(fname[0] == '/' ? (unsigned char *) ""
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: elinks_home,
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fname, opt_tree, &dumbstring, is_system_conf)) {
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done_string(&dumbstring);
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mem_free(fname);
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return ERROR_VALUE;
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}
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done_string(&dumbstring);
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mem_free(fname);
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return ERROR_NONE;
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}
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struct parse_handler {
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unsigned char *command;
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enum parse_error (*handler)(struct option *opt_tree,
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unsigned char **file, int *line,
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struct string *mirror, int is_system_conf);
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};
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static struct parse_handler parse_handlers[] = {
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{ "set", parse_set },
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{ "unset", parse_unset },
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{ "bind", parse_bind },
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{ "include", parse_include },
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{ NULL, NULL }
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};
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enum parse_error
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parse_config_command(struct option *options, unsigned char **file, int *line,
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struct string *mirror, int is_system_conf)
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{
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struct parse_handler *handler;
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for (handler = parse_handlers; handler->command;
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handler++) {
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int cmdlen = strlen(handler->command);
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if (!strncmp(*file, handler->command, cmdlen)
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&& isspace((*file)[cmdlen])) {
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enum parse_error err;
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struct string mirror2 = NULL_STRING;
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struct string *m2 = NULL;
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/* Mirror what we already have */
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if (mirror && init_string(&mirror2)) {
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m2 = &mirror2;
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add_bytes_to_string(m2, *file, cmdlen);
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}
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*file += cmdlen;
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err = handler->handler(options, file, line, m2,
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is_system_conf);
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if (!err && mirror && m2) {
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add_string_to_string(mirror, m2);
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}
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if (m2) done_string(m2);
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return err;
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}
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}
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return ERROR_COMMAND;
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}
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void
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parse_config_file(struct option *options, unsigned char *name,
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unsigned char *file, struct string *mirror,
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int is_system_conf)
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{
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int line = 1;
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int error_occured = 0;
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enum parse_error err = 0;
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enum verbose_level verbose = get_cmd_opt_int("verbose");
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unsigned char error_msg[][40] = {
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"no error",
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"parse error",
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"unknown command",
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"unknown option",
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"bad value",
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"no memory left",
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};
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while (file && *file) {
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unsigned char *orig_pos = file;
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/* Skip all possible comments and whitespace. */
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file = skip_white(file, &line);
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/* Mirror what we already have */
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if (mirror)
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add_bytes_to_string(mirror, orig_pos, file - orig_pos);
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/* Second chance to escape from the hell. */
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if (!*file) break;
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err = parse_config_command(options, &file, &line, mirror,
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is_system_conf);
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if (err == ERROR_COMMAND) {
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orig_pos = file;
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/* Jump over this crap we can't understand. */
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while (!isspace(*file) && *file != '#' && *file)
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file++;
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/* Mirror what we already have */
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if (mirror) add_bytes_to_string(mirror, orig_pos,
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file - orig_pos);
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}
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if (!mirror && err) {
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/* TODO: Make this a macro and report error directly
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* as it's stumbled upon; line info may not be accurate
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* anymore now (?). --pasky */
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if (verbose >= VERBOSE_WARNINGS) {
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fprintf(stderr, "%s:%d: %s\n",
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name, line, error_msg[err]);
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error_occured = 1;
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}
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err = 0;
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}
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}
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if (!error_occured) return;
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/* If an error occurred make sure that the user is notified and is able
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* to see it. First sound the bell. Then, if the text viewer is going to
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* be started, sleep for a while so the message will be visible before
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* ELinks starts drawing to on the screen and overwriting any error
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* messages. This should not be necessary for terminals supporting the
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* alternate screen mode but better to be safe. (debian bug 305017) */
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fputc('\a', stderr);
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if (get_cmd_opt_bool("dump")
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|| get_cmd_opt_bool("source"))
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return;
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sleep(1);
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}
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static unsigned char *
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read_config_file(unsigned char *name)
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{
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#define FILE_BUF 1024
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unsigned char cfg_buffer[FILE_BUF];
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struct string string;
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int fd;
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ssize_t r;
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fd = open(name, O_RDONLY | O_NOCTTY);
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if (fd < 0) return NULL;
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set_bin(fd);
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if (!init_string(&string)) return NULL;
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while ((r = safe_read(fd, cfg_buffer, FILE_BUF)) > 0) {
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int i;
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/* Clear problems ;). */
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for (i = 0; i < r; i++)
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if (!cfg_buffer[i])
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cfg_buffer[i] = ' ';
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add_bytes_to_string(&string, cfg_buffer, r);
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}
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if (r < 0) done_string(&string);
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close(fd);
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return string.source;
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#undef FILE_BUF
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}
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/* Return 0 on success. */
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static int
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load_config_file(unsigned char *prefix, unsigned char *name,
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struct option *options, struct string *mirror,
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int is_system_conf)
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{
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unsigned char *config_str, *config_file;
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config_file = straconcat(prefix, STRING_DIR_SEP, name, NULL);
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if (!config_file) return 1;
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config_str = read_config_file(config_file);
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if (!config_str) {
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mem_free(config_file);
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config_file = straconcat(prefix, STRING_DIR_SEP, ".", name, NULL);
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if (!config_file) return 2;
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config_str = read_config_file(config_file);
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if (!config_str) {
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mem_free(config_file);
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return 3;
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}
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}
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parse_config_file(options, config_file, config_str, mirror,
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is_system_conf);
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mem_free(config_str);
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mem_free(config_file);
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return 0;
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}
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static void
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load_config_from(unsigned char *file, struct option *tree)
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{
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load_config_file(CONFDIR, file, tree, NULL, 1);
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load_config_file(empty_string_or_(elinks_home), file, tree, NULL, 0);
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}
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void
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load_config(void)
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{
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load_config_from(get_cmd_opt_str("config-file"),
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config_options);
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}
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static int indentation = 2;
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/* 0 -> none, 1 -> only option full name+type, 2 -> only desc, 3 -> both */
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static int comments = 3;
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static int touching = 0;
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static inline unsigned char *
|
|
conf_i18n(unsigned char *s, int i18n)
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|
{
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|
if (i18n) return gettext(s);
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|
return s;
|
|
}
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|
|
|
static void
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add_indent_to_string(struct string *string, int depth)
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|
{
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if (!depth) return;
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add_xchar_to_string(string, ' ', depth * indentation);
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|
}
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|
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|
static void
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smart_config_output_fn(struct string *string, struct option *option,
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unsigned char *path, int depth, int do_print_comment,
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int action, int i18n)
|
|
{
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unsigned char *desc_i18n;
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|
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if (option->type == OPT_ALIAS)
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return;
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|
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/* XXX: OPT_LANGUAGE shouldn't have any bussiness here, but we're just
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* weird in that area. */
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if (touching && !(option->flags & OPT_TOUCHED)
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&& option->type != OPT_LANGUAGE)
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return;
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|
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switch (action) {
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case 0:
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if (!(comments & 1)) break;
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|
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add_indent_to_string(string, depth);
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|
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add_to_string(string, "## ");
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if (path) {
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add_to_string(string, path);
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add_char_to_string(string, '.');
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|
}
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|
add_to_string(string, option->name);
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add_char_to_string(string, ' ');
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add_to_string(string, option_types[option->type].help_str);
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|
add_char_to_string(string, '\n');
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|
break;
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|
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case 1:
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|
if (!(comments & 2)) break;
|
|
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if (!option->desc || !do_print_comment)
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break;
|
|
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desc_i18n = conf_i18n(option->desc, i18n);
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|
|
|
if (!*desc_i18n) break;
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|
|
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add_indent_to_string(string, depth);
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|
add_to_string(string, "# ");
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|
{
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|
unsigned char *i = desc_i18n;
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unsigned char *j = i;
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|
unsigned char *last_space = NULL;
|
|
int config_width = 80;
|
|
int n = depth * indentation + 3;
|
|
|
|
for (; *i; i++, n++) {
|
|
if (*i == '\n') {
|
|
last_space = i;
|
|
goto split;
|
|
}
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|
|
|
if (*i == ' ') last_space = i;
|
|
|
|
if (n >= config_width && last_space) {
|
|
split:
|
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add_bytes_to_string(string, j, last_space - j);
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|
add_char_to_string(string, '\n');
|
|
add_indent_to_string(string, depth);
|
|
add_to_string(string, "# ");
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|
j = last_space + 1;
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|
n = depth * indentation + 2 + i - last_space;
|
|
last_space = NULL;
|
|
}
|
|
}
|
|
add_to_string(string, j);
|
|
}
|
|
add_char_to_string(string, '\n');
|
|
break;
|
|
|
|
case 2:
|
|
|
|
add_indent_to_string(string, depth);
|
|
if (option->flags & OPT_DELETED) {
|
|
add_to_string(string, "un");
|
|
}
|
|
add_to_string(string, "set ");
|
|
if (path) {
|
|
add_to_string(string, path);
|
|
add_char_to_string(string, '.');
|
|
}
|
|
add_to_string(string, option->name);
|
|
if (!(option->flags & OPT_DELETED)) {
|
|
add_to_string(string, " = ");
|
|
/* OPT_ALIAS won't ever. OPT_TREE won't reach action 2.
|
|
* OPT_SPECIAL makes no sense in the configuration
|
|
* context. */
|
|
assert(option_types[option->type].write);
|
|
option_types[option->type].write(option, string);
|
|
}
|
|
add_char_to_string(string, '\n');
|
|
if (do_print_comment) add_char_to_string(string, '\n');
|
|
break;
|
|
|
|
case 3:
|
|
if (do_print_comment < 2)
|
|
add_char_to_string(string, '\n');
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
add_cfg_header_to_string(struct string *string, unsigned char *text)
|
|
{
|
|
int n = strlen(text) + 2;
|
|
|
|
int_bounds(&n, 10, 80);
|
|
|
|
add_to_string(string, "\n\n\n");
|
|
add_xchar_to_string(string, '#', n);
|
|
add_to_string(string, "\n# ");
|
|
add_to_string(string, text);
|
|
add_to_string(string, "#\n\n");
|
|
}
|
|
|
|
unsigned char *
|
|
create_config_string(unsigned char *prefix, unsigned char *name,
|
|
struct option *options)
|
|
{
|
|
struct string config;
|
|
/* Don't write headers if nothing will be added anyway. */
|
|
struct string tmpstring;
|
|
int origlen;
|
|
int savestyle = get_opt_int("config.saving_style");
|
|
int i18n = get_opt_bool("config.i18n");
|
|
|
|
if (!init_string(&config)) return NULL;
|
|
|
|
if (savestyle == 3) {
|
|
touching = 1;
|
|
savestyle = 1;
|
|
} else {
|
|
touching = 0;
|
|
}
|
|
|
|
if (savestyle == 2) watermark_deleted_options(options->value.tree);
|
|
|
|
/* Scaring. */
|
|
if (savestyle == 2
|
|
|| (savestyle < 2
|
|
&& (load_config_file(prefix, name, options, &config, 0)
|
|
|| !config.length))) {
|
|
/* At first line, and in English, write ELinks version, may be
|
|
* of some help in future. Please keep that format for it.
|
|
* --Zas */
|
|
add_to_string(&config, "## ELinks " VERSION " configuration file\n\n");
|
|
assert(savestyle >= 0 && savestyle <= 2);
|
|
switch (savestyle) {
|
|
case 0:
|
|
add_to_string(&config, conf_i18n(N_(
|
|
"## This is ELinks configuration file. You can edit it manually,\n"
|
|
"## if you wish so; this file is edited by ELinks when you save\n"
|
|
"## options through UI, however only option values will be altered\n"
|
|
"## and all your formatting, own comments etc will be kept as-is.\n"),
|
|
i18n));
|
|
break;
|
|
case 1:
|
|
add_to_string(&config, conf_i18n(N_(
|
|
"## This is ELinks configuration file. You can edit it manually,\n"
|
|
"## if you wish so; this file is edited by ELinks when you save\n"
|
|
"## options through UI, however only option values will be altered\n"
|
|
"## and missing options will be added at the end of file; if option\n"
|
|
"## is not written in this file, but in some file included from it,\n"
|
|
"## it is NOT counted as missing. Note that all your formatting,\n"
|
|
"## own comments and so on will be kept as-is.\n"), i18n));
|
|
break;
|
|
case 2:
|
|
add_to_string(&config, conf_i18n(N_(
|
|
"## This is ELinks configuration file. You can edit it manually,\n"
|
|
"## if you wish so, but keep in mind that this file is overwritten\n"
|
|
"## by ELinks when you save options through UI and you are out of\n"
|
|
"## luck with your formatting and own comments then, so beware.\n"),
|
|
i18n));
|
|
break;
|
|
}
|
|
|
|
add_to_string(&config, "##\n");
|
|
|
|
add_to_string(&config, conf_i18n(N_(
|
|
"## Obviously, if you don't like what ELinks is going to do with\n"
|
|
"## this file, you can change it by altering the config.saving_style\n"
|
|
"## option. Come on, aren't we friendly guys after all?\n"), i18n));
|
|
}
|
|
|
|
if (savestyle == 0) goto get_me_out;
|
|
|
|
indentation = get_opt_int("config.indentation");
|
|
comments = get_opt_int("config.comments");
|
|
|
|
if (!init_string(&tmpstring)) goto get_me_out;
|
|
|
|
add_cfg_header_to_string(&tmpstring,
|
|
conf_i18n(N_("Automatically saved options\n"), i18n));
|
|
|
|
origlen = tmpstring.length;
|
|
smart_config_string(&tmpstring, 2, i18n, options->value.tree, NULL, 0,
|
|
smart_config_output_fn);
|
|
if (tmpstring.length > origlen)
|
|
add_bytes_to_string(&config, tmpstring.source, tmpstring.length);
|
|
done_string(&tmpstring);
|
|
|
|
if (!init_string(&tmpstring)) goto get_me_out;
|
|
|
|
add_cfg_header_to_string(&tmpstring,
|
|
conf_i18n(N_("Automatically saved keybindings\n"), i18n));
|
|
|
|
origlen = tmpstring.length;
|
|
bind_config_string(&tmpstring);
|
|
if (tmpstring.length > origlen)
|
|
add_bytes_to_string(&config, tmpstring.source, tmpstring.length);
|
|
done_string(&tmpstring);
|
|
|
|
get_me_out:
|
|
unmark_options_tree(options->value.tree);
|
|
|
|
return config.source;
|
|
}
|
|
|
|
static int
|
|
write_config_file(unsigned char *prefix, unsigned char *name,
|
|
struct option *options, struct terminal *term)
|
|
{
|
|
int ret = -1;
|
|
struct secure_save_info *ssi;
|
|
unsigned char *config_file = NULL;
|
|
unsigned char *cfg_str = create_config_string(prefix, name, options);
|
|
int prefixlen = strlen(prefix);
|
|
int prefix_has_slash = (prefixlen && dir_sep(prefix[prefixlen - 1]));
|
|
int name_has_slash = dir_sep(name[0]);
|
|
unsigned char *slash = name_has_slash || prefix_has_slash ? "" : STRING_DIR_SEP;
|
|
|
|
if (!cfg_str) return -1;
|
|
|
|
if (name_has_slash && prefix_has_slash) name++;
|
|
|
|
config_file = straconcat(prefix, slash, name, NULL);
|
|
if (!config_file) goto free_cfg_str;
|
|
|
|
ssi = secure_open(config_file);
|
|
if (ssi) {
|
|
secure_fputs(ssi, cfg_str);
|
|
ret = secure_close(ssi);
|
|
}
|
|
|
|
write_config_dialog(term, config_file, secsave_errno, ret);
|
|
mem_free(config_file);
|
|
|
|
free_cfg_str:
|
|
mem_free(cfg_str);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
write_config(struct terminal *term)
|
|
{
|
|
assert(term);
|
|
|
|
if (!elinks_home) {
|
|
write_config_dialog(term, get_cmd_opt_str("config-file"),
|
|
SS_ERR_DISABLED, 0);
|
|
return -1;
|
|
}
|
|
|
|
return write_config_file(elinks_home, get_cmd_opt_str("config-file"),
|
|
config_options, term);
|
|
}
|