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#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include <limits.h>
#include <pwd.h>
#include <stdlib.h>
#include "config.h"
void fix_config_file_owner(const char *config_path)
{
char *sudo_uid_str = getenv("SUDO_UID");
char *sudo_gid_str = getenv("SUDO_GID");
if (sudo_uid_str && sudo_gid_str) {
uid_t original_uid = atoi(sudo_uid_str);
gid_t original_gid = atoi(sudo_gid_str);
chown(config_path, original_uid, original_gid);
}
}
struct config *prepare_config_file()
{
struct config *cfg = malloc(sizeof(struct config));
if (!cfg) {
return NULL;
}
char *sudo_user = getenv("SUDO_USER");
cfg->home = malloc(PATH_MAX);
if (!cfg->home) {
return NULL;
}
snprintf(cfg->home, PATH_MAX, "/home/%s", sudo_user);
cfg->config_file_path = malloc(strlen(cfg->home) + strlen("/.klrc"));
snprintf(cfg->config_file_path, PATH_MAX, "%s/.klrc", cfg->home);
if (access(cfg->config_file_path, F_OK) == -1) {
FILE *fp = fopen(cfg->config_file_path, "a");
if (!fp) {
return NULL;
}
fputs(CFG_FILE_COMMENT, fp);
printf("Config file was generated: %s\n",
cfg->config_file_path);
printf("Warning: There is no device which is defined in config, see README for details.\n");
fix_config_file_owner(cfg->config_file_path);
printf("%s\n", cfg->config_file_path);
fclose(fp);
}
return cfg;
}
struct config *parese_config(struct config *cfg)
{
if (!cfg) {
return NULL;
}
FILE *fp = fopen(cfg->config_file_path, "r");
if (!fp) {
return NULL;
}
int line_count = 0;
char line[128];
char key[64] = { 0 };
char val[64] = { 0 };
while (fgets(line, sizeof(line), fp)) {
line_count++;
/* Skip comment and blank lines */
if (line[0] == '#' || line[0] == '\n' || line[0] == '\r') {
continue;
}
int count = sscanf(line, "%s = %s", key, val);
if (count != 2) {
printf("Error at %s:%d\n invalid token: %s",
cfg->config_file_path, line_count, line);
return NULL;
}
if (CFG_COMPLETE(key, "device")) {
strncpy(cfg->device, val, sizeof(cfg->device) - 1);
cfg->device[sizeof(cfg->device) - 1] = '\0';
} else if (CFG_COMPLETE(key, "time")) {
if (CFG_COMPLETE(val, "true")) {
cfg->time = true;
} else {
cfg->time = false;
}
} else if (CFG_COMPLETE(key, "key_counter")) {
if (CFG_COMPLETE(val, "true")) {
cfg->keys_counter = true;
} else {
cfg->keys_counter = false;
}
}
}
fclose(fp);
return cfg;
}
struct config *config_init()
{
struct config *cfg = prepare_config_file();
if (!cfg) {
return NULL;
}
if (parese_config(cfg) == NULL) {
return NULL;
}
return cfg;
}
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