upstream-layers/meta-openembedded/meta-initramfs/recipes-kernel/kexec/kexec-tools-klibc/x86_vfscanf.patch

From c6934455ec2337e6da7ea9fbc3486ce9beeb5d82 Mon Sep 17 00:00:00 2001
From: OpenEmbedded <oe.patch@oe>
Date: Wed, 11 Apr 2018 22:51:05 +0200
Subject: [PATCH] x86-linux-setup.c: replace vfscanf() with vsscanf()

klibc lacks vfscanf()

Upstream-Status: Inappropriate [klibc specific]
Signed-off-by: Andrea Adami <andrea.adami@gmail.com>

---
 kexec/arch/i386/x86-linux-setup.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

--- a/kexec/arch/i386/x86-linux-setup.c
+++ b/kexec/arch/i386/x86-linux-setup.c
@@ -215,6 +215,8 @@ static int file_scanf(const char *dir, c
 	FILE *fp;
 	int retno;
 	char filename[PATH_MAX];
+	long line_size = MAX_LINE;
+	char *line;
 
 	snprintf(filename, PATH_MAX, "%s/%s", dir, file);
 	filename[PATH_MAX-1] = 0;
@@ -225,7 +227,14 @@ static int file_scanf(const char *dir, c
 	}
 
 	va_start(argptr, scanf_line);
-	retno = vfscanf(fp, scanf_line, argptr);
+
+	line = xmalloc(sizeof(line) * line_size);
+	while(fgets(line, sizeof(line), fp) != NULL ) {
+		line_size += MAX_LINE;
+		line = xrealloc(line,line_size);
+	}
+	retno = vsscanf(line, scanf_line, argptr);
+
 	va_end(argptr);
 
 	fclose(fp);