139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
/*
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* Copyright (c) 2015, 2016, 2017, 2021 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* conf.c
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* Utility functions to handle upgrade.conf(5).
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*/
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stddef.h>
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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 "conf.h"
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void conf_init(struct conf* conf)
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{
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memset(conf, 0, sizeof(*conf));
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conf->ports = true;
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conf->system = true;
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}
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void conf_free(struct conf* conf)
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{
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conf_init(conf);
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}
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static bool conf_boolean(const char* name,
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const char* value,
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const char* path,
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off_t line_number)
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{
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if ( !strcmp(value, "yes") )
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return true;
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if ( !strcmp(value, "no") )
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return false;
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printf("%s:%ji: %s: Expected yes or no instead of unsupported value\n",
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path, (intmax_t) line_number, name);
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return false;
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}
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static bool conf_assign(struct conf* conf,
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const char* name,
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const char* value,
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const char* path,
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off_t line_number)
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{
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if ( !strcmp(name, "grub") )
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conf->grub = conf_boolean(name, value, path, line_number);
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else if ( !strcmp(name, "newsrc") )
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conf->newsrc = conf_boolean(name, value, path, line_number);
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else if ( !strcmp(name, "ports") )
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conf->ports = conf_boolean(name, value, path, line_number);
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else if ( !strcmp(name, "src") )
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conf->src = conf_boolean(name, value, path, line_number);
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else if ( !strcmp(name, "system") )
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conf->system = conf_boolean(name, value, path, line_number);
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else
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printf("%s:%ji: Unsupported variable: %s\n", path,
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(intmax_t) line_number, name);
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return true;
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}
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bool conf_load(struct conf* conf, const char* path)
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{
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FILE* fp = fopen(path, "r");
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if ( !fp )
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return false;
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char* line = NULL;
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size_t line_size = 0;
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ssize_t line_length;
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intmax_t line_number = 0;
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bool success = true;
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while ( 0 < (line_length = getline(&line, &line_size, fp)) )
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{
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line_number++;
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if ( line[line_length - 1] == '\n' )
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line[--line_length] = '\0';
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line_length = 0;
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while ( line[line_length] && line[line_length] != '#' )
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line_length++;
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line[line_length] = '\0';
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while ( line_length && isblank((unsigned char) line[line_length - 1]) )
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line[--line_length] = '\0';
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char* name = line;
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while ( *name && isblank((unsigned char) *name) )
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name++;
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if ( !*name )
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continue;
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if ( *name == '=' )
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{
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printf("%s:%ji: Ignoring malformed line\n", path, line_number);
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continue;
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}
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size_t name_length = 1;
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while ( name[name_length] &&
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!isblank((unsigned char) name[name_length]) &&
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name[name_length] != '=' )
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name_length++;
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char* value = name + name_length;
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while ( *value && isblank((unsigned char) *value) )
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value++;
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if ( *value != '=' )
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{
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printf("%s:%ji: Ignoring malformed line\n", path, line_number);
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continue;
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}
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value++;
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while ( *value && isblank((unsigned char) *value) )
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value++;
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name[name_length] = '\0';
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if ( !conf_assign(conf, name, value, path, line_number) )
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{
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success = false;
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break;
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}
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}
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if ( ferror(fp) )
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success = false;
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free(line);
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fclose(fp);
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return success;
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}
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