vlog: Be more liberal in syntax for -v and vlog/set.

Until now, the argument to -v and vlog/set has had to take the form
"module:facility:level".  I can never remember the required order, so this
commit switches to allowing any order.

Signed-off-by: Ben Pfaff <blp@nicira.com>

1 files changed, 26 insertions, 19 deletions

diff --git a/lib/vlog.man b/lib/vlog.man
index a2316dab..a8c82230 100644
--- a/lib/vlog.man
+++ b/lib/vlog.man
@@ -3,36 +3,43 @@
 .  ns
 .  IP "\\$1"
 ..
-.IP "\fB\-v\fImodule\fR[\fB:\fIfacility\fR[\fB:\fIlevel\fR]]"
-.IQ "\fB\-\-verbose=\fImodule\fR[\fB:\fIfacility\fR[\fB:\fIlevel\fR]]"
+.IP "\fB\-v\fR[\fIspec\fR]
+.IQ "\fB\-\-verbose=\fR[\fIspec\fR]
 .
-Sets the logging level for \fImodule\fR in \fIfacility\fR to
-\fIlevel\fR:
+Sets logging levels.  Without any \fIspec\fR, sets the log level for
+every module and facility to \fBdbg\fR.  Otherwise, \fIspec\fR is a
+list of words separated by spaces or commas or colons, up to one from
+each category below:
 .
 .RS
 .IP \(bu
-\fImodule\fR may be any valid module name (as displayed by the
-\fB\-\-list\fR action on \fBovs\-appctl\fR(8)), or the special name
-\fBANY\fR to set the logging levels for all modules.
+A valid module name, as displayed by the \fBvlog/list\fR command on
+\fBovs\-appctl\fR(8), limits the log level change to the specified
+module.
 .
 .IP \(bu
-\fIfacility\fR may be \fBsyslog\fR, \fBconsole\fR, or \fBfile\fR to
-set the levels for logging to the system log, the console, or a file
-respectively, or \fBANY\fR to set the logging levels for both
-facilities.  If it is omitted, \fIfacility\fR defaults to \fBANY\fR.
-.IP
-Regardless of the log levels set for \fBfile\fR, logging to a file
-will not take place unless \fB\-\-log\-file\fR is also specified (see
-below).
+\fBsyslog\fR, \fBconsole\fR, or \fBfile\fR, to limit the log level
+change to only to the system log, to the console, or to a file,
+respectively.
 .
 .IP \(bu 
-\fIlevel\fR must be one of \fBoff\fR, \fBemer\fR, \fBerr\fR, \fBwarn\fR,
-\fBinfo\fR, or
-\fBdbg\fR, designating the minimum severity of a message for it to be
-logged.  If it is omitted, \fIlevel\fR defaults to \fBdbg\fR.  See
+\fBoff\fR, \fBemer\fR, \fBerr\fR, \fBwarn\fR, \fBinfo\fR, or
+\fBdbg\fR, to control the log level.  Messages of the given severity
+or higher will be logged, and messages of lower severity will be
+filtered out.  \fBoff\fR filters out all messages.  See
 \fBovs\-appctl\fR(8) for a definition of each log level.
 .RE
 .
+.IP
+Case is not significant within \fIspec\fR.
+.IP
+Regardless of the log levels set for \fBfile\fR, logging to a file
+will not take place unless \fB\-\-log\-file\fR is also specified (see
+below).
+.IP
+For compatibility with older versions of OVS, \fBany\fR is accepted as
+a word but has no effect.
+.
 .IP "\fB\-v\fR"
 .IQ "\fB\-\-verbose\fR"
 Sets the maximum logging verbosity level, equivalent to