Fix typos. Document -y option.

man/remind.1

@@ -217,6 +217,10 @@ case, it only changes the environment variables as described above.
 It does not change the effective uid or gid.
 .RE
 .TP
+\fB-y\fR
+Causes \fBRemind\fR to synthesize a tag for any reminder that lacks a
+TAG clause.
+.TP
 \fB\-i\fR\fIvar\fR\fB=\fR\fIexpr\fR
 Sets the value of the specified \fIvar\fR to \fIexpr\fR, and \fBpreserves\fR
 \fIvar\fR.  \fIExpr\fR can be any valid \fBRemind\fR expression.  See the
@@ -849,7 +853,14 @@ tags; you should \fInot\fR use the \fBTAG\fR keyword yourself, or
 your script will interact badly with back-ends.
 .PP
 The \fBTAG\fR keyword is followed by a tag consisting of up to
-32 characters.
+48 characters.
+.PP
+If you supply the \fB\-y\fR option to \fBRemind\fR, then any
+reminder that lacks a \fBTAG\fR will have one synthesized.  The
+synthesized tag consists of the characters "__syn__" followed
+by the hexadecimal representation of the MD5 sum of the REM
+command line.  This lets you give a more-or-less unique identifier
+to each distinct REM command.
 .PP
 The \fBDURATION\fR keyword makes sense only for timed reminders;
 it specifies the duration of an event.  Currently, this is not

scripts/tkremind

@@ -155,7 +155,7 @@ proc Initialize {} {
     global DayNames argc argv CommandLine ReminderFile AppendFile Remind PSCmd
     global MondayFirst
 
-    set CommandLine "|$Remind -itkremind=1 -p -l"
+    set CommandLine "|$Remind -itkremind=1 -p -y -l"
     set PSCmd "$Remind -p -l"
     set i 0
     while {$i < $argc} {

src/custom.h

@@ -204,7 +204,7 @@
 /*---------------------------------------------------------------------*/
 #define TAG_LEN 48
 
-#define PASSTHRU_LEN 48
+#define PASSTHRU_LEN 32
 
 #define PSBEGIN "# rem2ps begin"
 #define PSEND   "# rem2ps end"

src/custom.h.in

@@ -202,9 +202,9 @@
 /*---------------------------------------------------------------------*/
 /* TAG_LEN: The maximum length of tags.  Don't change it               */
 /*---------------------------------------------------------------------*/
-#define TAG_LEN 32
+#define TAG_LEN 48
 
-#define PASSTHRU_LEN 24
+#define PASSTHRU_LEN 32
 
 #define PSBEGIN "# rem2ps begin"
 #define PSEND   "# rem2ps end"

src/queue.c

@@ -95,7 +95,7 @@ int QueueReminder(ParsePtr p, Trigger *trig,
     qelem->ntrig = 0;
     strcpy(qelem->sched, sched);
     strcpy(qelem->tag, trig->tag);
-    if (!qelem->tag && SynthesizeTags) {
+    if (! *qelem->tag && SynthesizeTags) {
 	SynthesizeTag(qelem->tag);
     }
     QueueHead = qelem;