Add write_or_die(), a helper function

[git.git] / write_or_die.c

diff --git a/write_or_die.c b/write_or_die.c
new file mode 100644 (file)
index 0000000..ab4cb8a
--- /dev/null
+++ b/write_or_die.c
@@ -0,0 +1,20 @@
+#include "cache.h"
+
+void write_or_die(int fd, const void *buf, size_t count)
+{
+       const char *p = buf;
+       ssize_t written;
+
+       while (count > 0) {
+               written = xwrite(fd, p, count);
+               if (written == 0)
+                       die("disk full?");
+               else if (written < 0) {
+                       if (errno == EPIPE)
+                               exit(0);
+                       die("write error (%s)", strerror(errno));
+               }
+               count -= written;
+               p += written;
+       }
+}