New :i and :l commands to adjust intervals.

2 files changed, 31 insertions, 2 deletions

diff --git a/pw.1 b/pw.1
index b90a34b..281ba17 100644
--- a/pw.1
+++ b/pw.1
@@ -298,7 +298,23 @@ status line disappears. If the optional
 modifier is included in the command, then it pops the entire stack,
 forgetting all the patterns and disabling grep mode.
 
+.IP "\fB:i\fP \fIreal\fP"
+Set the poll interval to the number of seconds specified by
+.IR real .
+See the description of the
+.B -i
+command line option for the argument format and semantics.
+
+.IP "\fB:l\fP \fIreal\fP"
+Set the long interval to the number of seconds specified by
+.IR real .
+See the description of the
+.B -i
+command option for the argument format and the
+.B -l
+option for the semantics.
 .PP
+
 Any other command results in a brief error message.
 
 .SH OPTIONS
@@ -380,8 +396,6 @@ The program uses hard-coded ANSI sequences, so it doesn't support interesting
 old terminals. On the other hand, it carries no dependency on any
 terminal abstraction library/data.
 
-The intervals cannot be dynamically adjusted.
-
 There is no support for unwrapping long lines, which would be useful for
 copy and paste. However, the features like
 .B :w
diff --git a/pw.c b/pw.c
index 6a4b5b2..826f0eb 100644
--- a/pw.c
+++ b/pw.c
@@ -474,6 +474,21 @@ static void execute(char *cmd, unsigned *pstat)
     if (ngrep == 0)
       *pstat &= ~stat_grep;
     break;
+  case 'i': case 'l':
+    {
+      char *err = 0;
+      int interval = getms(arg, &err);
+
+      if (interval < 0)
+        snprintf(cmd, cmdsize, "%s", err);
+      else if (cmd[1] == 'i')
+        poll_interval = interval;
+      else
+        long_interval = interval;
+
+      dsdrop(err);
+    }
+    break;
   default:
     sprintf(cmd, "bad command");
     break;