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Diffstat (limited to 'shared/nm-shared-utils.c')
| -rw-r--r-- | shared/nm-shared-utils.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/shared/nm-shared-utils.c b/shared/nm-shared-utils.c new file mode 100644 index 0000000000..0ae54bdcf0 --- /dev/null +++ b/shared/nm-shared-utils.c @@ -0,0 +1,228 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ +/* NetworkManager -- Network link manager + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301 USA. + * + * (C) Copyright 2016 Red Hat, Inc. + */ + +#include "nm-default.h" + +#include "nm-shared-utils.h" + +#include <errno.h> + +/*****************************************************************************/ + +/* _nm_utils_ascii_str_to_int64: + * + * A wrapper for g_ascii_strtoll, that checks whether the whole string + * can be successfully converted to a number and is within a given + * range. On any error, @fallback will be returned and %errno will be set + * to a non-zero value. On success, %errno will be set to zero, check %errno + * for errors. Any trailing or leading (ascii) white space is ignored and the + * functions is locale independent. + * + * The function is guaranteed to return a value between @min and @max + * (inclusive) or @fallback. Also, the parsing is rather strict, it does + * not allow for any unrecognized characters, except leading and trailing + * white space. + **/ +gint64 +_nm_utils_ascii_str_to_int64 (const char *str, guint base, gint64 min, gint64 max, gint64 fallback) +{ + gint64 v; + size_t len; + char buf[64], *s, *str_free = NULL; + + if (str) { + while (g_ascii_isspace (str[0])) + str++; + } + if (!str || !str[0]) { + errno = EINVAL; + return fallback; + } + + len = strlen (str); + if (g_ascii_isspace (str[--len])) { + /* backward search the first non-ws character. + * We already know that str[0] is non-ws. */ + while (g_ascii_isspace (str[--len])) + ; + + /* str[len] is now the last non-ws character... */ + len++; + + if (len >= sizeof (buf)) + s = str_free = g_malloc (len + 1); + else + s = buf; + + memcpy (s, str, len); + s[len] = 0; + + nm_assert (len > 0 && len < strlen (str) && len == strlen (s)); + nm_assert (!g_ascii_isspace (str[len-1]) && g_ascii_isspace (str[len])); + nm_assert (strncmp (str, s, len) == 0); + + str = s; + } + + errno = 0; + v = g_ascii_strtoll (str, &s, base); + + if (errno != 0) + v = fallback; + else if (s[0] != 0) { + errno = EINVAL; + v = fallback; + } else if (v > max || v < min) { + errno = ERANGE; + v = fallback; + } + + if (G_UNLIKELY (str_free)) + g_free (str_free); + return v; +} + +/*****************************************************************************/ + +G_DEFINE_QUARK (nm-utils-error-quark, nm_utils_error) + +void +nm_utils_error_set_cancelled (GError **error, + gboolean is_disposing, + const char *instance_name) +{ + if (is_disposing) { + g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_CANCELLED_DISPOSING, + "Disposing %s instance", + instance_name && *instance_name ? instance_name : "source"); + } else { + g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CANCELLED, + "Request cancelled"); + } +} + +gboolean +nm_utils_error_is_cancelled (GError *error, + gboolean consider_is_disposing) +{ + if (error) { + if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) + return TRUE; + if ( consider_is_disposing + && g_error_matches (error, NM_UTILS_ERROR, NM_UTILS_ERROR_CANCELLED_DISPOSING)) + return TRUE; + } + return FALSE; +} + +/*****************************************************************************/ + +/** + * nm_g_object_set_property: + * @object: the target object + * @property_name: the property name + * @value: the #GValue to set + * @error: (allow-none): optional error argument + * + * A reimplementation of g_object_set_property(), but instead + * returning an error instead of logging a warning. All g_object_set*() + * versions in glib require you to not pass invalid types or they will + * log a g_warning() -- without reporting an error. We don't want that, + * so we need to hack error checking around it. + * + * Returns: whether the value was successfully set. + */ +gboolean +nm_g_object_set_property (GObject *object, + const gchar *property_name, + const GValue *value, + GError **error) +{ + GParamSpec *pspec; + nm_auto_unset_gvalue GValue tmp_value = G_VALUE_INIT; + GObjectClass *klass; + + g_return_val_if_fail (G_IS_OBJECT (object), FALSE); + g_return_val_if_fail (property_name != NULL, FALSE); + g_return_val_if_fail (G_IS_VALUE (value), FALSE); + g_return_val_if_fail (!error || !*error, FALSE); + + /* g_object_class_find_property() does g_param_spec_get_redirect_target(), + * where we differ from a plain g_object_set_property(). */ + pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (object), property_name); + + if (!pspec) { + g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN, + _("object class '%s' has no property named '%s'"), + G_OBJECT_TYPE_NAME (object), + property_name); + return FALSE; + } + if (!(pspec->flags & G_PARAM_WRITABLE)) { + g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN, + _("property '%s' of object class '%s' is not writable"), + pspec->name, + G_OBJECT_TYPE_NAME (object)); + return FALSE; + } + if ((pspec->flags & G_PARAM_CONSTRUCT_ONLY)) { + g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN, + _("construct property \"%s\" for object '%s' can't be set after construction"), + pspec->name, G_OBJECT_TYPE_NAME (object)); + return FALSE; + } + + klass = g_type_class_peek (pspec->owner_type); + if (klass == NULL) { + g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN, + _("'%s::%s' is not a valid property name; '%s' is not a GObject subtype"), + g_type_name (pspec->owner_type), pspec->name, g_type_name (pspec->owner_type)); + return FALSE; + } + + /* provide a copy to work from, convert (if necessary) and validate */ + g_value_init (&tmp_value, pspec->value_type); + if (!g_value_transform (value, &tmp_value)) { + g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN, + _("unable to set property '%s' of type '%s' from value of type '%s'"), + pspec->name, + g_type_name (pspec->value_type), + G_VALUE_TYPE_NAME (value)); + return FALSE; + } + if ( g_param_value_validate (pspec, &tmp_value) + && !(pspec->flags & G_PARAM_LAX_VALIDATION)) { + gs_free char *contents = g_strdup_value_contents (value); + + g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN, + _("value \"%s\" of type '%s' is invalid or out of range for property '%s' of type '%s'"), + contents, + G_VALUE_TYPE_NAME (value), + pspec->name, + g_type_name (pspec->value_type)); + return FALSE; + } + + g_object_set_property (object, property_name, &tmp_value); + return TRUE; +} + +/*****************************************************************************/ |