1 files changed, 16 insertions, 0 deletions
diff --git a/write_or_die.c b/write_or_die.c
index 650f13fc01..6db1d3123d 100644
--- a/write_or_die.c
+++ b/write_or_die.c
@@ -1,5 +1,21 @@
 #include "cache.h"
 
+void read_or_die(int fd, void *buf, size_t count)
+{
+	char *p = buf;
+	ssize_t loaded;
+
+	while (count > 0) {
+		loaded = xread(fd, p, count);
+		if (loaded == 0)
+			die("unexpected end of file");
+		else if (loaded < 0)
+			die("read error (%s)", strerror(errno));
+		count -= loaded;
+		p += loaded;
+	}
+}
+
 void write_or_die(int fd, const void *buf, size_t count)
 {
 	const char *p = buf;