From 88ab03ef5d6530ccd9ec1d245a1836360e7e78f6 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Tue, 4 Feb 2020 17:10:33 -0500
Subject: satisfy guarantee

---
 getprogname.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/getprogname.c b/getprogname.c
index 9294f44..2beac9e 100644
--- a/getprogname.c
+++ b/getprogname.c
@@ -1,6 +1,7 @@
 #define _POSIX_C_SOURCE 2
 #include <limits.h>
 #include <stdio.h>
+#include <string.h>
 #include <unistd.h>
 
 char *get_program_name(size_t n, char buf[static n])
@@ -13,13 +14,16 @@ char *get_program_name(size_t n, char buf[static n])
 		return NULL;
 	}
 
-	if (fscanf(pip, "%s", buf) != 1) {
-		pclose(pip);
-		return NULL;
+	char *ret = fgets(pip, buf, n);
+	if (ret) {
+		char *nl = strchr(ret, '\n');
+		if (nl) {
+			*nl = '\0';
+		}
 	}
 
 	pclose(pip);
-	return buf;
+	return ret;
 }
 
 char *getprogname(void)
-- 
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