X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/8452130aa48a4ecfce975c1fcf002c3b20fb6480..eb5b6b0c3c4d9a38bb205b2c8bc9aeeba8674a25:/src/xbt/log.c

diff --git a/src/xbt/log.c b/src/xbt/log.c
index b5bab4af52..374191a92c 100644
--- a/src/xbt/log.c
+++ b/src/xbt/log.c
@@ -420,6 +420,16 @@ The following example resets the additivity of the xbt category to true (which i
     option and specify the max file size. This would be a nice default for
     non-kernel applications.
   - Careful, category names are global variables.
+  - When writing a log format, you often want to use spaces. If you don't
+    protect these spaces, they are used as configuration elements separators.
+    For example, if you want to remove the date from the logs, you want to pass the following 
+    argument on the command line. The outer quotes are here to protect the string from the shell 
+    interpretation while the inner ones are there to prevent simgrid from splitting the string 
+    in several log parameters (that would be invalid).
+    \verbatim --log="'root.fmt:%l: [%p/%c]: %m%n'"\endverbatim
+    Another option is to use the SimGrid-specific format directive \%e for
+    spaces, like in the following.
+    \verbatim --log="root.fmt:%l:%e[%p/%c]:%e%m%n"\endverbatim
 
 \section log_internals 4. Internal considerations
 
@@ -1062,7 +1072,7 @@ void xbt_log_threshold_set(xbt_log_category_t cat,
 
 static xbt_log_setting_t _xbt_log_parse_setting(const char *control_string)
 {
-
+  const char *orig_control_string = control_string;
   xbt_log_setting_t set = xbt_new(s_xbt_log_setting_t, 1);
   const char *name, *dot, *eq;
 
@@ -1085,7 +1095,7 @@ static xbt_log_setting_t _xbt_log_parse_setting(const char *control_string)
   control_string += strcspn(control_string, " ");
 
   xbt_assert(*dot == '.' && (*eq == '=' || *eq == ':'),
-              "Invalid control string '%s'", control_string);
+              "Invalid control string '%s'", orig_control_string);
 
   if (!strncmp(dot + 1, "threshold", (size_t) (eq - dot - 1))) {
     int i;