X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=CONTRIBUTING.adoc;h=bc6ff471ec403e22e6f2e1698ed35211eedee2f2;hp=e81d42b7cb76d50ad1f61bc71cf7c78986903a70;hb=6c20f4a0c496cfac67ceabe876edc796929ffb64;hpb=f9ded0e0b7cec670982963369284612ec1a251c7

diff --git a/CONTRIBUTING.adoc b/CONTRIBUTING.adoc
index e81d42b7..bc6ff471 100644
--- a/CONTRIBUTING.adoc
+++ b/CONTRIBUTING.adoc
@@ -69,9 +69,9 @@ node of the graph keeps all other reachable nodes alive.
 
 The scheme employed in Babeltrace to break this cycle consists in the
 "children" holding *reverse component references* to their parents. That
-is, in the context of CTF IR, that event classes hold a reference to
-their parent stream class and stream classes hold a reference to their
-parent trace.
+is, in the context of the trace IR, that event classes hold a reference
+to their parent stream class and stream classes hold a reference to
+their parent trace.
 
 On the other hand, parents hold *claiming aggregation references* to
 their children. A claiming aggregation reference means that the object
@@ -431,6 +431,24 @@ contain their log level in their name:
 `BT_LOGF_MEM(data_ptr, data_size, "format string", ...)`::
     Memory fatal logging statement.
 
+`BT_LOGV_ERRNO("initial message", "format string", ...)`::
+	`errno` string verbose logging statement.
+
+`BT_LOGD_ERRNO("initial message", "format string", ...)`::
+	`errno` string debug logging statement.
+
+`BT_LOGI_ERRNO("initial message", "format string", ...)`::
+	`errno` string info logging statement.
+
+`BT_LOGW_ERRNO("initial message", "format string", ...)`::
+	`errno` string warning logging statement.
+
+`BT_LOGE_ERRNO("initial message", "format string", ...)`::
+	`errno` string error logging statement.
+
+`BT_LOGF_ERRNO("initial message", "format string", ...)`::
+	`errno` string fatal logging statement.
+
 `BT_LOGV_STR("preformatted string")`::
     Preformatted string verbose logging statement.
 
@@ -595,8 +613,8 @@ the environment variable and sets the log level symbol accordingly.
 --
 [source,c]
 ----
-#ifndef MY_MODULE_LOGGING_H
-#define MY_MODULE_LOGGING_H
+#ifndef BABELTRACE_MY_MODULE_LOGGING_H
+#define BABELTRACE_MY_MODULE_LOGGING_H
 
 /*
  * Copyright (c) 2017 EfficiOS Inc. <http://efficios.com/>
@@ -625,7 +643,7 @@ the environment variable and sets the log level symbol accordingly.
 
 BT_LOG_LEVEL_EXTERN_SYMBOL(my_module_log_level);
 
-#endif /* MY_MODULE_LOGGING_H */
+#endif /* BABELTRACE_MY_MODULE_LOGGING_H */
 ----
 --
 +
@@ -635,6 +653,9 @@ log level symbol.
 . Include the `logging.c` and `logging.h` in the `_SOURCES` variable
   of your module's object in your module's root `Makefile.am`.
 
+. Add the log level initializing environment variable name to the
+  `log_level_env_var_names` array in `cli/babeltrace.c`.
+
 
 [[logging-instrument-source]]
 ==== Instrument a C source file