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/* SPDX-License-Identifier: GPL-2.0 */
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "shared/utils.h"
#include "minecctl.h"
#include "server.h"
#include "misc.h"
#define INVALID(msg) do { *error = (msg); return false; } while(0)
void server_load_all_known(struct cfg *cfg)
{
struct dirent *dent;
_cleanup_free_ char *cpath = NULL;
_cleanup_free_ char *dpath = NULL;
if (cfg->server_list_loaded)
return;
cfg->server_list_loaded = true;
cfg->cfg_dir = open_cfg_dir(NULL, &cpath);
if (!cfg->cfg_dir) {
error("Failed to open config directory %s", cpath);
return;
}
cfg->data_dir = open_data_dir(NULL, &dpath);
if (!cfg->data_dir) {
error("Failed to open server directory %s", dpath);
return;
}
while ((dent = readdir(cfg->cfg_dir))) {
struct server *server;
if (!config_valid_server_filename(dent, NULL))
continue;
server = server_new(dent->d_name);
list_add(&server->list, &cfg->servers);
}
}
static bool read_file(int dfd, const char *filename, char *buf, size_t len,
const char **error)
{
_cleanup_close_ int fd = -1;
size_t off;
ssize_t r;
fd = openat(dfd, filename, O_RDONLY | O_CLOEXEC);
if (fd < 0)
INVALID("failed to open file");
for (off = 0; off < len; off += r) {
r = read(fd, buf + off, len - off);
if (r < 0) {
if (errno == EAGAIN || errno == EINTR)
continue;
INVALID("failed to read file");
} else if (r == 0)
break;
}
if (off >= len - 1)
INVALID("file too large");
buf[off] = '\0';
return true;
}
bool server_read_config(struct cfg *cfg, struct server *server,
unsigned *lineno, const char **error)
{
_cleanup_close_ int dfd = -1;
char buf[4096];
if (!error)
return false;
if (!server)
INVALID("Invalid argument, server missing");
if (!lineno)
INVALID("Invalid argument, lineno not set");
if (!server->scfg.filename)
INVALID("Invalid argument, filename not set");
if (server->file_read)
return true;
if (!cfg->cfg_dir)
INVALID("Configuration directory not opened");
if (!cfg->data_dir)
INVALID("Server directory not opened");
*lineno = 0;
server->file_read = true;
if (!read_file(dirfd(cfg->cfg_dir), server->scfg.filename, buf,
sizeof(buf), error))
return false;
if (!scfg_parse(&server->scfg, buf, false, lineno, error))
return false;
/* fill in missing parameters from server.properties */
dfd = open_subdir(dirfd(cfg->data_dir), server->scfg.name, false);
if (dfd < 0)
goto out;
if (!read_file(dfd, MC_SERVER_PROPERTIES, buf, sizeof(buf),
error))
goto out;
sprop_parse(&server->scfg, buf, lineno, error);
out:
if (!server->scfg.rcon_password)
verbose("rcon password not set");
if (list_empty(&server->scfg.rcons))
verbose("rcon address not found in %s", server->scfg.filename);
if (list_empty(&server->scfg.remotes))
verbose("mc server address not found in %s", server->scfg.filename);
return true;
}
bool server_read_all_configs(struct cfg *cfg, bool print_results)
{
struct server *server;
unsigned lineno;
const char *error;
bool rv = true;
server_load_all_known(cfg);
/* server->scfg.filename check excludes servers created from cmdline */
list_for_each_entry(server, &cfg->servers, list) {
if (!server->scfg.filename)
continue;
if (!server_read_config(cfg, server, &lineno, &error)) {
if (lineno != 0 && print_results)
info("• %s: %sfail%s - line %u: %s",
server->scfg.name, ansi_red, ansi_normal,
lineno, error);
else if (print_results)
info("• %s: %sfail%s - %s",
server->scfg.name, ansi_red, ansi_normal,
error);
rv = false;
} else if (!scfg_validate(&server->scfg, &error) &&
print_results) {
info("• %s: %sfail%s - %s",
server->scfg.name, ansi_red, ansi_normal,
error);
rv = false;
} else if (print_results) {
info("• %s: %sok%s", server->scfg.name, ansi_green,
ansi_normal);
}
}
return rv;
}
struct server *server_get_default(struct cfg *cfg)
{
struct server *server;
unsigned lineno;
const char *error;
server = list_first_entry_or_null(&cfg->servers, struct server, list);
if (!server)
die("No servers defined");
if (!server_read_config(cfg, server, &lineno, &error)) {
error("%s: server_read_config error - %s", server->scfg.name, error);
return NULL;
}
return server;
}
bool server_set_default(struct cfg *cfg, const char *name)
{
struct server *server;
assert_die(cfg, "invalid arguments");
server_load_all_known(cfg);
list_for_each_entry(server, &cfg->servers, list) {
if (streq(name, server->scfg.name)) {
list_rotate_to_front(&server->list, &cfg->servers);
cfg->default_set = true;
return true;
}
}
return false;
}
void server_free_all(struct cfg *cfg)
{
struct server *server, *tmp;
list_for_each_entry_safe(server, tmp, &cfg->servers, list)
server_free(server);
}
void server_free(struct server *server)
{
scfg_delete(&server->scfg);
xfree(server);
}
struct server *server_new(const char *filename)
{
struct server *server;
server = zmalloc(sizeof(*server));
scfg_init(&server->scfg, filename);
INIT_LIST_HEAD(&server->list);
return server;
}
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