core.5: Explain that core_pattern %e is process/thread 'comm' value

The 'comm' value is typically the same as the (possibly
truncated) executable name, but may be something different.

Reported-by: Jonny Grant <jg@jguk.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man5/core.5 b/man5/core.5
index 0d7b7b61783af6945d54d223373ac1d90c673807..995ac3a62bb06b6a14af54b9de3779d02b1eeff6 100644 (file)
--- a/man5/core.5
+++ b/man5/core.5
@@ -174,7 +174,17 @@ dump mode\(emsame as value returned by
 (since Linux 3.7)
 .TP
 %e
-executable filename (without path prefix)
+The process or thread's
+.I comm
+value, which typically is the same as the executable filename
+(without path prefix, and truncated to a maximum of 15 characters),
+but may have been modified to be something different;
+see the discussion of
+.I /proc/[pid]/comm
+and
+.I /proc/[pid]/task/[tid]/comm
+in
+.BR proc (5).
 .TP
 %E
 pathname of executable,