From 70b0b72b1649e830f2135051b6420dce4fcaacc8 Mon Sep 17 00:00:00 2001
From: dtb <trinity@trinity.moe>
Date: Fri, 21 Oct 2022 19:59:23 -0400
Subject: [PATCH] prompt(1)

---
 echo/Makefile |  7 +++++--
 echo/echo.c   | 15 ++++++++++-----
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/echo/Makefile b/echo/Makefile
index b8c8c33..d82b837 100644
--- a/echo/Makefile
+++ b/echo/Makefile
@@ -1,10 +1,13 @@
-TARGETS = echo
+TARGETS = echo prompt
 
 all: $(TARGETS)
 
-%: %.c
+echo: echo.c
 	$(CC) -o $@ $@.c
 
+prompt: echo.c
+	$(CC) -DPROMPT -o $@ echo.c
+
 clean:
 	rm -f $(TARGETS)
 
diff --git a/echo/echo.c b/echo/echo.c
index 6edc29a..36bf746 100644
--- a/echo/echo.c
+++ b/echo/echo.c
@@ -8,13 +8,18 @@ int main(int argc, char **argv){
 	if(*argv == NULL)
 		goto blank;
 	
-	while(*++argv != NULL){
-		for(i = 0; argv[0][i] != '\0'; ++i);
-		write(1, *argv, i);
+	++argv;
 
-		if(*(argv+1) != NULL)
+	while(--argc){
+		for(i = 0; argv[0][i] != '\0'; ++i);
+		write(1, *(argv++), i);
+		if(argc > 1)
 			write(1, " ", 1);
 	}
-blank:	write(1, "\n", 1);
+
+blank:
+#ifndef PROMPT
+	write(1, "\n", 1);
+#endif
 	return EX_OK;
 }