Add keep_tite configuration option

Similar to dialog(3) keep_tite option used to prevent visually disturbing
initialization or exit that could occur when run from a script using
dpv(3) by way of dpv(1) in sequence with other dialog(1) invocations.

4 files changed, 9 insertions, 3 deletions

diff --git a/lib/libdpv/dpv.3 b/lib/libdpv/dpv.3
index 8581279..011ab82 100644
--- a/lib/libdpv/dpv.3
+++ b/lib/libdpv/dpv.3
@@ -1,4 +1,4 @@
-.\" Copyright (c) 2013-2015 Devin Teske
+.\" Copyright (c) 2013-2016 Devin Teske
 .\" All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd Oct 22, 2015
+.Dd Jan 26, 2016
 .Dt DPV 3
 .Os
 .Sh NAME
@@ -64,6 +64,7 @@ argument contains the following properties for configuring global display
 features:
 .Bd -literal -offset indent
 struct dpv_config {
+    uint8_t          keep_tite;     /* Cleaner exit for scripts */
     enum dpv_display display_type;  /* Def. DPV_DISPLAY_LIBDIALOG */
     enum dpv_output  output_type;   /* Default DPV_OUTPUT_NONE */
     int              debug;         /* Enable debug on stderr */
diff --git a/lib/libdpv/dpv.c b/lib/libdpv/dpv.c
index d3506ca..edf75bd 100644
--- a/lib/libdpv/dpv.c
+++ b/lib/libdpv/dpv.c
@@ -69,6 +69,7 @@ long long dpv_overall_read = 0;
 static char pathbuf[PATH_MAX];
 
 /* Extra display information */
+uint8_t keep_tite = FALSE;	/* dpv_config.keep_tite */
 uint8_t no_labels = FALSE;	/* dpv_config.options & DPV_NO_LABELS */
 uint8_t wide = FALSE;		/* dpv_config.options & DPV_WIDE_MODE */
 char *aprompt = NULL;		/* dpv_config.aprompt */
@@ -150,6 +151,7 @@ dpv(struct dpv_config *config, struct dpv_file_node *file_list)
 	dialog_updates_per_second = DIALOG_UPDATES_PER_SEC;
 	display_limit	= DISPLAY_LIMIT_DEFAULT;
 	display_type	= DPV_DISPLAY_LIBDIALOG;
+	keep_tite	= FALSE;
 	label_size	= LABEL_SIZE_DEFAULT;
 	msg_done	= NULL;
 	msg_fail	= NULL;
@@ -193,6 +195,7 @@ dpv(struct dpv_config *config, struct dpv_file_node *file_list)
 		dialog_updates_per_second = config->dialog_updates_per_second;
 		display_limit	= config->display_limit;
 		display_type	= config->display_type;
+		keep_tite	= config->keep_tite;
 		label_size	= config->label_size;
 		msg_done	= (char *)config->msg_done;
 		msg_fail	= (char *)config->msg_fail;
@@ -695,7 +698,7 @@ dpv(struct dpv_config *config, struct dpv_file_node *file_list)
 			close(dialog_out);
 			waitpid(pid, (int *)NULL, 0);	
 		}
-		if (!dpv_interrupt)
+		if (!keep_tite && !dpv_interrupt)
 			printf("\n");
 	} else
 		warnx("%s: %lli overall read", __func__, dpv_overall_read);
diff --git a/lib/libdpv/dpv.h b/lib/libdpv/dpv.h
index 03768a7..67d7bc1 100644
--- a/lib/libdpv/dpv.h
+++ b/lib/libdpv/dpv.h
@@ -97,6 +97,7 @@ struct dpv_file_node {
  * Anatomy of config option to pass as dpv() config argument
  */
 struct dpv_config {
+	uint8_t	keep_tite;		/* Prevent visually distracting exit */
 	enum dpv_display display_type;	/* Display (default TYPE_LIBDIALOG) */
 	enum dpv_output  output_type;	/* Output (default TYPE_NONE) */
 	int	debug;			/* Enable debugging output on stderr */
diff --git a/lib/libdpv/dpv_private.h b/lib/libdpv/dpv_private.h
index 5164eb3..1bebba6 100644
--- a/lib/libdpv/dpv_private.h
+++ b/lib/libdpv/dpv_private.h
@@ -38,6 +38,7 @@ extern uint8_t debug;
 extern unsigned int dpv_nfiles;
 
 /* Extra display information */
+extern uint8_t keep_tite;
 extern uint8_t no_labels;
 extern uint8_t wide;
 extern char *msg_done, *msg_fail, *msg_pending;