116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015, 2016.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <http://www.gnu.org/licenses/>.
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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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static bool conf_boolean(const char* name, const char* value, const char* path)
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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: %s: Expected yes or no instead of unsupported value\n",
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path, name);
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return false;
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}
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static void 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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{
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if ( !strcmp(name, "grub") )
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conf->grub = conf_boolean(name, value, path);
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else if ( !strcmp(name, "newsrc") )
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conf->newsrc = conf_boolean(name, value, path);
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else if ( !strcmp(name, "ports") )
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conf->ports = conf_boolean(name, value, path);
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else if ( !strcmp(name, "src") )
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conf->src = conf_boolean(name, value, path);
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else if ( !strcmp(name, "system") )
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conf->system = conf_boolean(name, value, path);
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else
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printf("%s: %s: Unsupported variable\n", path, name);
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}
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void load_upgrade_conf(struct conf* conf, const char* path)
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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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FILE* fp = fopen(path, "r");
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if ( !fp )
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{
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if ( errno == ENOENT )
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return;
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err(2, "%s", path);
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}
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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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while ( 0 < (errno = 0, line_length = getline(&line, &line_size, fp)) )
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{
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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 || *name == '=' )
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continue;
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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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continue;
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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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conf_assign(conf, name, value, path);
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}
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if ( errno )
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err(2, "%s", path);
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free(line);
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fclose(fp);
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}
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