/* SPDX-License-Identifier: LGPL-2.1+ */
/*
* Copyright (C) 2018 Red Hat, Inc.
*/
#include "nm-default.h"
#include "nm-core-utils.h"
#include "nm-core-internal.h"
#include "nm-keyfile/nm-keyfile-internal.h"
#include "nm-initrd-generator.h"
#include "nm-glib-aux/nm-io-utils.h"
/*****************************************************************************/
#define _NMLOG(level, domain, ...) \
nm_log((level), \
(domain), \
NULL, \
NULL, \
"initrd-generator: " _NM_UTILS_MACRO_FIRST(__VA_ARGS__) \
_NM_UTILS_MACRO_REST(__VA_ARGS__))
/*****************************************************************************/
static void
output_conn(gpointer key, gpointer value, gpointer user_data)
{
const char * basename = key;
NMConnection * connection = value;
char * connections_dir = user_data;
nm_auto_unref_keyfile GKeyFile *file = NULL;
gs_free char * data = NULL;
gs_free_error GError *error = NULL;
gsize len;
if (!nm_connection_normalize(connection, NULL, NULL, &error))
goto err_out;
file = nm_keyfile_write(connection, NM_KEYFILE_HANDLER_FLAGS_NONE, NULL, NULL, &error);
if (file == NULL)
goto err_out;
data = g_key_file_to_data(file, &len, &error);
if (!data)
goto err_out;
if (connections_dir) {
gs_free char *filename = NULL;
gs_free char *full_filename = NULL;
filename = nm_keyfile_utils_create_filename(basename, TRUE);
full_filename = g_build_filename(connections_dir, filename, NULL);
if (!nm_utils_file_set_contents(full_filename, data, len, 0600, NULL, &error))
goto err_out;
} else
g_print("\n*** Connection '%s' ***\n\n%s", basename, data);
return;
err_out:
g_print("%s\n", error->message);
}
#define DEFAULT_SYSFS_DIR "/sys"
#define DEFAULT_INITRD_DATA_DIR NMRUNDIR "/initrd"
int
main(int argc, char *argv[])
{
GHashTable * connections;
gs_free char * connections_dir = NULL;
gs_free char * initrd_dir = NULL;
gs_free char * sysfs_dir = NULL;
gboolean dump_to_stdout = FALSE;
gs_strfreev char **remaining = NULL;
GOptionEntry option_entries[] = {
{"connections-dir",
'c',
0,
G_OPTION_ARG_FILENAME,
&connections_dir,
"Output connection directory",
NM_KEYFILE_PATH_NAME_RUN},
{"initrd-data-dir",
'i',
0,
G_OPTION_ARG_FILENAME,
&initrd_dir,
"Output initrd data directory",
DEFAULT_INITRD_DATA_DIR},
{"sysfs-dir",
'd',
0,
G_OPTION_ARG_FILENAME,
&sysfs_dir,
"The sysfs mount point",
DEFAULT_SYSFS_DIR},
{"stdout",
's',
0,
G_OPTION_ARG_NONE,
&dump_to_stdout,
"Dump connections to standard output",
NULL},
{G_OPTION_REMAINING, '\0', 0, G_OPTION_ARG_STRING_ARRAY, &remaining, NULL, NULL},
{NULL}};
nm_auto_free_option_context GOptionContext *option_context = NULL;
gs_free_error GError *error = NULL;
gs_free char * hostname = NULL;
int errsv;
option_context = g_option_context_new(
"-- [ip=...] [rd.route=...] [bridge=...] [bond=...] [team=...] [vlan=...] "
"[bootdev=...] [nameserver=...] [rd.peerdns=...] [rd.bootif=...] [BOOTIF=...] "
"[rd.znet=...] ... ");
g_option_context_set_summary(option_context, "Generate early NetworkManager configuration.");
g_option_context_set_description(
option_context,
"This tool scans the command line for options relevant to network\n"
"configuration and creates configuration files for an early instance\n"
"of NetworkManager run from the initial ramdisk during early boot.");
g_option_context_add_main_entries(option_context, option_entries, GETTEXT_PACKAGE);
if (!g_option_context_parse(option_context, &argc, &argv, &error)) {
_LOGW(LOGD_CORE, "%s", error->message);
return 1;
}
if (!remaining) {
/* No arguments, no networking. Don't bother. */
return 0;
}
if (!connections_dir)
connections_dir = g_strdup(NM_KEYFILE_PATH_NAME_RUN);
if (!sysfs_dir)
sysfs_dir = g_strdup(DEFAULT_SYSFS_DIR);
if (!initrd_dir)
initrd_dir = g_strdup(DEFAULT_INITRD_DATA_DIR);
if (dump_to_stdout)
nm_clear_g_free(&connections_dir);
if (connections_dir && g_mkdir_with_parents(connections_dir, 0755) != 0) {
errsv = errno;
_LOGW(LOGD_CORE, "%s: %s", connections_dir, nm_strerror_native(errsv));
return 1;
}
connections = nmi_cmdline_reader_parse(sysfs_dir, (const char *const *) remaining, &hostname);
g_hash_table_foreach(connections, output_conn, connections_dir);
g_hash_table_destroy(connections);
if (dump_to_stdout) {
if (hostname)
g_print("\n*** Hostname '%s' ***\n", hostname);
} else {
if (g_mkdir_with_parents(initrd_dir, 0755) != 0) {
errsv = errno;
_LOGW(LOGD_CORE, "%s: %s", initrd_dir, nm_strerror_native(errsv));
return 1;
}
if (hostname) {
gs_free char *hostname_file = NULL;
gs_free char *data = NULL;
hostname_file = g_strdup_printf("%s/hostname", initrd_dir);
data = g_strdup_printf("%s\n", hostname);
if (!g_file_set_contents(hostname_file, data, strlen(data), &error)) {
_LOGW(LOGD_CORE, "%s: %s", hostname_file, error->message);
return 1;
}
}
}
return 0;
}