core: allow building and running without udev

Instead of relying on the udev daemon and GUDev to manage the devices reported
by the kernel, we can now run ModemManager relying solely on the kernel events
reported via the new ReportKernelEvent() API. Therefore, the '--no-auto-scan'
option is implicit for the ModemManager daemon when udev is disabled in the
build.

Additionally, a new custom implementation of the kernel device object is
provided, which uses sysfs to load the properties and attributes required in
each kernel device, instead of using a GUdevDevice.

The udev rule files are kept in place, and a simple custom parser is provided
which preloads all rules in memory once and then applies them to the different
kernel objects reported via ReportKernelEvent(), e.g. to set port type hints.
A simple unit test setup is prepared to validate the udev rules during the
`check' Makefile target.

2 files changed, 45 insertions, 0 deletions

diff --git a/libmm-glib/mm-common-helpers.c b/libmm-glib/mm-common-helpers.c
index 4b784da0..3a5883b2 100644
--- a/libmm-glib/mm-common-helpers.c
+++ b/libmm-glib/mm-common-helpers.c
@@ -1386,6 +1386,49 @@ mm_get_uint_from_str (const gchar *str,
     return FALSE;
 }
 
+/**
+ * mm_get_uint_from_hex_str:
+ * @str: the hex string to convert to an unsigned int
+ * @out: on success, the number
+ *
+ * Converts a string to an unsigned number.  All characters in the string
+ * MUST be valid hexadecimal digits (0-9, A-F, a-f), otherwise FALSE is
+ * returned.
+ *
+ * An optional "0x" prefix may be given in @str.
+ *
+ * Returns: %TRUE if the string was converted, %FALSE if it was not or if it
+ * did not contain only digits.
+ */
+gboolean
+mm_get_uint_from_hex_str (const gchar *str,
+                          guint       *out)
+{
+    gulong num;
+
+    if (!str)
+        return FALSE;
+
+    if (g_str_has_prefix (str, "0x"))
+        str = &str[2];
+
+    if (!str[0])
+        return FALSE;
+
+    for (num = 0; str[num]; num++) {
+        if (!g_ascii_isxdigit (str[num]))
+            return FALSE;
+    }
+
+    errno = 0;
+    num = strtoul (str, NULL, 16);
+    if (!errno && num <= G_MAXUINT) {
+        *out = (guint)num;
+        return TRUE;
+    }
+    return FALSE;
+}
+
 gboolean
 mm_get_uint_from_match_info (GMatchInfo *match_info,
                              guint32 match_index,
diff --git a/libmm-glib/mm-common-helpers.h b/libmm-glib/mm-common-helpers.h
index c65d3b98..ab5777d1 100644
--- a/libmm-glib/mm-common-helpers.h
+++ b/libmm-glib/mm-common-helpers.h
@@ -143,6 +143,8 @@ gboolean  mm_get_int_from_match_info             (GMatchInfo *match_info,
                                                   gint *out);
 gboolean  mm_get_uint_from_str                   (const gchar *str,
                                                   guint *out);
+gboolean  mm_get_uint_from_hex_str               (const gchar *str,
+                                                  guint       *out);
 gboolean  mm_get_uint_from_match_info            (GMatchInfo *match_info,
                                                   guint32 match_index,
                                                   guint *out);