mirror of
https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
synced 2025-12-29 12:40:11 +01:00
b216abb012
... and nm_utils_fd_get_contents() and nm_utils_file_set_contents(). Don't mix negative errno return value with a GError output. Instead, return a boolean result indicating success or failure. Also, optionally - output GError - set out_errsv to the positive errno (or 0 on success) Obviously, the return value and the output arguments (contents, length, out_errsv, error) must all agree in their success/failure result. That means, you may check any of the return value, out_errsv, error, and contents to reliably detect failure or success. Also note that out_errsv gives the positive(!) errno. But you probably shouldn't care about the distinction and use nm_errno_native() either way to normalize the value.
140 lines
4.7 KiB
C
140 lines
4.7 KiB
C
/* NetworkManager initrd configuration generator
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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* Copyright (C) 2018 Red Hat, Inc.
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*/
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#include "nm-default.h"
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#include "nm-core-utils.h"
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#include "nm-core-internal.h"
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#include "nm-keyfile-internal.h"
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#include "nm-initrd-generator.h"
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#include "nm-glib-aux/nm-io-utils.h"
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/*****************************************************************************/
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#define _NMLOG(level, domain, ...) \
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nm_log ((level), (domain), NULL, NULL, \
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"initrd-generator: " _NM_UTILS_MACRO_FIRST (__VA_ARGS__) \
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_NM_UTILS_MACRO_REST (__VA_ARGS__))
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/*****************************************************************************/
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static void
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output_conn (gpointer key, gpointer value, gpointer user_data)
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{
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const char *basename = key;
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NMConnection *connection = value;
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char *connections_dir = user_data;
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gs_unref_keyfile GKeyFile *file = NULL;
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gs_free char *data = NULL;
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gs_free_error GError *error = NULL;
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gsize len;
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if (!nm_connection_normalize (connection, NULL, NULL, &error))
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goto err_out;
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file = nm_keyfile_write (connection, NULL, NULL, &error);
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if (file == NULL)
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goto err_out;
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data = g_key_file_to_data (file, &len, &error);
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if (!data)
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goto err_out;
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if (connections_dir) {
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gs_free char *filename = NULL;
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gs_free char *full_filename = NULL;
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filename = nm_keyfile_utils_create_filename (basename, TRUE);
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full_filename = g_build_filename (connections_dir, filename, NULL);
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if (!nm_utils_file_set_contents (full_filename,
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data,
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len,
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0600,
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NULL,
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&error))
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goto err_out;
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} else
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g_print ("\n*** Connection '%s' ***\n\n%s", basename, data);
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return;
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err_out:
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g_print ("%s\n", error->message);
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}
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#define DEFAULT_SYSFS_DIR "/sys"
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int
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main (int argc, char *argv[])
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{
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GHashTable *connections;
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gs_free char *connections_dir = NULL;
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gs_free char *sysfs_dir = NULL;
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gboolean dump_to_stdout = FALSE;
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gs_strfreev char **remaining = NULL;
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GOptionEntry option_entries[] = {
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{ "connections-dir", 'c', 0, G_OPTION_ARG_FILENAME, &connections_dir, "Output connection directory", NM_KEYFILE_PATH_NAME_RUN },
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{ "sysfs-dir", 'd', 0, G_OPTION_ARG_FILENAME, &sysfs_dir, "The sysfs mount point", DEFAULT_SYSFS_DIR },
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{ "stdout", 's', 0, G_OPTION_ARG_NONE, &dump_to_stdout, "Dump connections to standard output", NULL },
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{ G_OPTION_REMAINING, '\0', 0, G_OPTION_ARG_STRING_ARRAY, &remaining, NULL, NULL },
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{ NULL }
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};
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GOptionContext *option_context;
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GError *error = NULL;
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int errsv;
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option_context = g_option_context_new ("-- [ip=...] [rd.route=...] [bridge=...] [bond=...] [team=...] [vlan=...] "
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"[bootdev=...] [nameserver=...] [rd.peerdns=...] [rd.bootif=...] [BOOTIF=...] ... ");
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g_option_context_set_summary (option_context, "Generate early NetworkManager configuration.");
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g_option_context_set_description (option_context,
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"This tool scans the command line for options relevant to network\n"
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"configuration and creates configuration files for an early instance\n"
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"of NetworkManager run from the initial ramdisk during early boot.");
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g_option_context_add_main_entries (option_context, option_entries, GETTEXT_PACKAGE);
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if (!g_option_context_parse (option_context, &argc, &argv, &error)) {
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_LOGW (LOGD_CORE, "%s", error->message);
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return 1;
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}
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if (!remaining) {
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/* No arguments, no networking. Don't bother. */
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return 0;
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}
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if (!connections_dir)
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connections_dir = g_strdup (NM_KEYFILE_PATH_NAME_RUN);
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if (!sysfs_dir)
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sysfs_dir = g_strdup (DEFAULT_SYSFS_DIR);
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if (dump_to_stdout)
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g_clear_pointer (&connections_dir, g_free);
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if (connections_dir && g_mkdir_with_parents (connections_dir, 0755) != 0) {
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errsv = errno;
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_LOGW (LOGD_CORE, "%s: %s", connections_dir, nm_strerror_native (errsv));
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return 1;
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}
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connections = nmi_cmdline_reader_parse (sysfs_dir, remaining);
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g_hash_table_foreach (connections, output_conn, connections_dir);
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g_hash_table_destroy (connections);
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return 0;
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}
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