[libgpiod][PATCH] tools: clarify the non-option arguments in help text

[Bartosz Golaszewski <brgl@xxxxxxxx>]

From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>

We already use [] for optional and <> for required arguments in help text
but let's make it clear that we can pass multiple chips/lines and in most
tools only the first one is required.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
---
 tools/gpiodetect.c | 2 +-
 tools/gpioget.c    | 2 +-
 tools/gpioinfo.c   | 2 +-
 tools/gpiomon.c    | 2 +-
 tools/gpionotify.c | 2 +-
 tools/gpioset.c    | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/gpiodetect.c b/tools/gpiodetect.c
index 0a3461b..569cdfe 100644
--- a/tools/gpiodetect.c
+++ b/tools/gpiodetect.c
@@ -12,7 +12,7 @@
 
 static void print_help(void)
 {
-	printf("Usage: %s [OPTIONS] [chip]...\n", get_prog_name());
+	printf("Usage: %s [OPTIONS] [chip1] [chip2] ...\n", get_prog_name());
 	printf("\n");
 	printf("List GPIO chips, print their labels and number of GPIO lines.\n");
 	printf("\n");
diff --git a/tools/gpioget.c b/tools/gpioget.c
index f611737..5d3092b 100644
--- a/tools/gpioget.c
+++ b/tools/gpioget.c
@@ -26,7 +26,7 @@ struct config {
 
 static void print_help(void)
 {
-	printf("Usage: %s [OPTIONS] <line>...\n", get_prog_name());
+	printf("Usage: %s [OPTIONS] <line1> [line2] ...\n", get_prog_name());
 	printf("\n");
 	printf("Read values of GPIO lines.\n");
 	printf("\n");
diff --git a/tools/gpioinfo.c b/tools/gpioinfo.c
index 44d1c8c..002d631 100644
--- a/tools/gpioinfo.c
+++ b/tools/gpioinfo.c
@@ -20,7 +20,7 @@ struct config {
 
 static void print_help(void)
 {
-	printf("Usage: %s [OPTIONS] [line]...\n", get_prog_name());
+	printf("Usage: %s [OPTIONS] [line1] [line2] ...\n", get_prog_name());
 	printf("\n");
 	printf("Print information about GPIO lines.\n");
 	printf("\n");
diff --git a/tools/gpiomon.c b/tools/gpiomon.c
index e3abb2d..cb76913 100644
--- a/tools/gpiomon.c
+++ b/tools/gpiomon.c
@@ -35,7 +35,7 @@ struct config {
 
 static void print_help(void)
 {
-	printf("Usage: %s [OPTIONS] <line>...\n", get_prog_name());
+	printf("Usage: %s [OPTIONS] <line1> [line2] ...\n", get_prog_name());
 	printf("\n");
 	printf("Wait for events on GPIO lines and print them to standard output.\n");
 	printf("\n");
diff --git a/tools/gpionotify.c b/tools/gpionotify.c
index 2c56590..71eacbb 100644
--- a/tools/gpionotify.c
+++ b/tools/gpionotify.c
@@ -28,7 +28,7 @@ struct config {
 
 static void print_help(void)
 {
-	printf("Usage: %s [OPTIONS] <line>...\n", get_prog_name());
+	printf("Usage: %s [OPTIONS] <line1> [line2] ...\n", get_prog_name());
 	printf("\n");
 	printf("Wait for changes to info on GPIO lines and print them to standard output.\n");
 	printf("\n");
diff --git a/tools/gpioset.c b/tools/gpioset.c
index 9dc5aeb..e0d971c 100644
--- a/tools/gpioset.c
+++ b/tools/gpioset.c
@@ -36,7 +36,7 @@ struct config {
 
 static void print_help(void)
 {
-	printf("Usage: %s [OPTIONS] <line=value>...\n", get_prog_name());
+	printf("Usage: %s [OPTIONS] <line1=value1> [line2=value2] ...\n", get_prog_name());
 	printf("\n");
 	printf("Set values of GPIO lines.\n");
 	printf("\n");
-- 
2.39.2