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-rw-r--r--write_or_die.c16
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;