2 files changed, 81 insertions, 0 deletions
diff --git a/src/libgamma-error.c b/src/libgamma-error.c
new file mode 100644
index 0000000..cd63282
--- /dev/null
+++ b/src/libgamma-error.c
@@ -0,0 +1,35 @@
+/**
+ * libgamma — Display server abstraction layer for gamma ramp adjustments
+ * Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "libgamma-error.h"
+
+
+#include <stddef.h>
+#include <sys/types.h>
+
+
+/**
+ * Group that the user needs to be a member of if `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned
+ */
+gid_t libgamma_group_gid = 0;
+
+/**
+ * Group that the user needs to be a member of if `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
+ * `NULL` if the name of the group `libgamma_group_gid` cannot be determined
+ */
+const char* libgamma_group_name = NULL;
+
diff --git a/src/libgamma-error.h b/src/libgamma-error.h
index c3c3c2f..5223207 100644
--- a/src/libgamma-error.h
+++ b/src/libgamma-error.h
@@ -22,6 +22,20 @@
 # error libgamma-error.h should not be included directly, include libgamma.h instead
 #endif
 
+#include <sys/types.h>
+
+
+/**
+ * Group that the user needs to be a member of if `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned
+ */
+extern gid_t libgamma_group_gid;
+
+/**
+ * Group that the user needs to be a member of if `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
+ * `NULL` if the name of the group `libgamma_group_gid` cannot be determined
+ */
+extern const char* libgamma_group_name;
+
 
 /**
  * The selected adjustment method does not exist
@@ -108,6 +122,38 @@
  */
 #define LIBGAMMA_LIST_CRTCS_FAILED  (-16)
 
+/**
+ * Failed to acquire mode resources from the adjustment method
+ */
+#define LIBGAMMA_ACQUIRING_MODE_RESOURCES_FAILED  (-17)
+
+/**
+ * The adjustment method reported that a negative number of partitions exists in the site
+ */
+#define LIBGAMMA_NEGATIVE_PARTITION_COUNT  (-18)
+
+/**
+ * The adjustment method reported that a negative number of CRTC:s exists in the partition
+ */
+#define LIBGAMMA_NEGATIVE_CRTC_COUNT  (-19)
+
+/**
+ * Device cannot be access becauses of insufficient permissions
+ */
+#define LIBGAMMA_DEVICE_RESTRICTED  (-20)
+
+/**
+ * Device cannot be access, reason unknown
+ */
+#define LIBGAMMA_DEVICE_ACCESS_FAILED  (-21)
+
+/**
+ * Device cannot be access, membership of the `libgamma_group_gid`
+ * (named by `libgamma_group_name` (can be `NULL`, if so `errno` may
+ * have been set to tell why)) is required
+ */
+#define LIBGAMMA_DEVICE_REQUIRE_GROUP  (-22)
+
 
 
 #endif