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trivial: Parse the os-release file in a more useful way

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This allows us to use the other keys for future use.
This commit is contained in:
Richard Hughes 2018-01-11 10:30:39 +00:00
parent 6b22295cf0
commit ae142a411f
1 changed files with 71 additions and 22 deletions
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93
libfwupd/fwupd-common.c
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@ -1,6 +1,6 @@
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
*
* Copyright (C) 2017 Richard Hughes <richard@hughsie.com>
* Copyright (C) 2017-2018 Richard Hughes <richard@hughsie.com>
*
* Licensed under the GNU Lesser General Public License Version 2.1
*
@ -137,34 +137,83 @@ fwupd_checksum_get_best (GPtrArray *checksums)
return NULL;
}
/**
* fwupd_build_distro_hash:
* @error: A #GError or %NULL
*
* Loads information from the system os-release file.
**/
static GHashTable *
fwupd_build_distro_hash (GError **error)
{
GHashTable *hash;
const gchar *filename = NULL;
const gchar *paths[] = { "/etc/os-release", "/usr/lib/os-release", NULL };
g_autofree gchar *buf = NULL;
g_auto(GStrv) lines = NULL;
/* find the correct file */
for (guint i = 0; paths[i] != NULL; i++) {
g_debug ("looking for os-release at %s", paths[i]);
if (g_file_test (paths[i], G_FILE_TEST_EXISTS)) {
filename = paths[i];
break;
}
}
if (filename == NULL) {
g_set_error_literal (error,
FWUPD_ERROR,
FWUPD_ERROR_READ,
"No os-release found");
return NULL;
}
/* load each line */
if (!g_file_get_contents (filename, &buf, NULL, error))
return NULL;
hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
lines = g_strsplit (buf, "\n", -1);
for (guint i = 0; lines[i] != NULL; i++) {
gsize len, off = 0;
g_auto(GStrv) split = NULL;
/* split up into sections */
split = g_strsplit (lines[i], "=", 2);
if (g_strv_length (split) < 2)
continue;
/* remove double quotes if set both ends */
len = strlen (split[1]);
if (len == 0)
continue;
if (split[1][0] == '\"' && split[1][len-1] == '\"') {
off++;
len -= 2;
}
g_hash_table_insert (hash,
g_strdup (split[0]),
g_strndup (split[1] + off, len));
}
return hash;
}
static gchar *
fwupd_build_user_agent_os_release (void)
{
const gchar *keys[] = { "NAME=", "VERSION_ID=", "VARIANT=", NULL };
const gchar *values[] = { NULL, NULL, NULL, NULL };
g_autofree gchar *os_release = NULL;
g_auto(GStrv) lines = NULL;
const gchar *keys[] = { "NAME", "VERSION_ID", "VARIANT", NULL };
g_autoptr(GHashTable) hash = NULL;
g_autoptr(GPtrArray) ids_os = g_ptr_array_new ();
/* get raw data then parse each line */
if (!g_file_get_contents ("/etc/os-release", &os_release, NULL, NULL)) {
if (!g_file_get_contents ("/usr/lib/os-release", &os_release, NULL, NULL))
return NULL;
}
lines = g_strsplit (os_release, "\n", -1);
for (guint i = 0; lines[i] != NULL; i++) {
for (guint j = 0; keys[j] != NULL; j++) {
if (g_str_has_prefix (lines[i], keys[j])) {
values[j] = lines[i] + strlen (keys[j]);
break;
}
}
}
/* get all keys */
hash = fwupd_build_distro_hash (NULL);
if (hash == NULL)
return NULL;
/* create an array of the keys that exist */
for (guint j = 0; values[j] != NULL; j++) {
if (values[j] != NULL)
g_ptr_array_add (ids_os, (gpointer) values[j]);
for (guint i = 0; keys[i] != NULL; i++) {
const gchar *value = g_hash_table_lookup (hash, keys[i]);
if (value != NULL)
g_ptr_array_add (ids_os, (gpointer) value);
}
if (ids_os->len == 0)
return NULL;