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libsysprof: remove authorization from perf source

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This will be done more generically from the local profiler
later on.
This commit is contained in:
Christian Hergert
2019-05-10 09:24:28 -07:00
parent 037ac96425
commit eff557db59
1 changed files with 3 additions and 115 deletions
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118
src/libsysprof/sysprof-perf-source.c
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@ -725,8 +725,6 @@ sysprof_perf_source_start (SysprofSource *source)
self->running = TRUE;
sysprof_perf_counter_enable (self->counter);
sysprof_source_emit_ready (source);
}
static void
@ -772,123 +770,13 @@ sysprof_perf_source_add_pid (SysprofSource *source,
g_hash_table_add (self->pids, GINT_TO_POINTER (pid));
}
static void
sysprof_perf_source_emit_ready (SysprofPerfSource *self)
{
g_assert (SYSPROF_IS_PERF_SOURCE (self));
self->is_ready = TRUE;
sysprof_source_emit_ready (SYSPROF_SOURCE (self));
}
static void
sysprof_perf_source_authorize_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
g_autoptr(SysprofPerfSource) self = user_data;
g_autoptr(GError) error = NULL;
g_assert (G_IS_ASYNC_RESULT (result));
if (!sysprof_perf_counter_authorize_finish (result, &error))
{
if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED))
{
sysprof_source_emit_failed (SYSPROF_SOURCE (self), error);
return;
}
}
sysprof_perf_source_emit_ready (self);
}
static gboolean
user_owns_pid (uid_t uid,
GPid pid)
{
g_autofree gchar *contents = NULL;
g_autofree gchar *path = NULL;
g_autoptr(SysprofLineReader) reader = NULL;
gchar *line;
gsize len;
gsize line_len;
path = g_strdup_printf ("/proc/%u/status", (guint)pid);
if (!g_file_get_contents (path, &contents, &len, NULL))
return FALSE;
reader = sysprof_line_reader_new (contents, len);
while (NULL != (line = (gchar *)sysprof_line_reader_next (reader, &line_len)))
{
if (g_str_has_prefix (line, "Uid:"))
{
g_auto(GStrv) parts = NULL;
guint i;
line[line_len] = '\0';
parts = g_strsplit (line, "\t", 0);
for (i = 1; parts[i]; i++)
{
gint64 v64;
v64 = g_ascii_strtoll (parts[i], NULL, 10);
if (v64 > 0 && v64 <= G_MAXUINT)
{
if ((uid_t)v64 == uid)
return TRUE;
}
}
}
}
return FALSE;
}
static gboolean
sysprof_perf_source_needs_auth (SysprofPerfSource *self)
{
GHashTableIter iter;
gpointer key;
uid_t uid;
g_assert (SYSPROF_IS_PERF_SOURCE (self));
if (g_hash_table_size (self->pids) == 0)
return TRUE;
uid = getuid ();
g_hash_table_iter_init (&iter, self->pids);
while (g_hash_table_iter_next (&iter, &key, NULL))
{
GPid pid = GPOINTER_TO_INT (key);
if (!user_owns_pid (uid, pid))
return TRUE;
}
return FALSE;
}
static void
sysprof_perf_source_prepare (SysprofSource *source)
{
SysprofPerfSource *self = (SysprofPerfSource *)source;
g_assert (SYSPROF_IS_PERF_SOURCE (source));
g_assert (SYSPROF_IS_PERF_SOURCE (self));
if (sysprof_perf_source_needs_auth (self))
sysprof_perf_counter_authorize_async (NULL,
sysprof_perf_source_authorize_cb,
g_object_ref (self));
else
sysprof_perf_source_emit_ready (self);
SYSPROF_PERF_SOURCE (source)->is_ready = TRUE;
sysprof_source_emit_ready (source);
}
static gboolean