git-commit: allow --only to lose what was staged earlier.

diff --git a/write_or_die.c b/write_or_die.c
index ab4cb8a69cd6e54c12dac647bb5af1df54fdf6c8..bfe4eeb6494c7076bf7f319cf11628f586142aa5 100644 (file)
--- a/write_or_die.c
+++ b/write_or_die.c
@@ -18,3 +18,28 @@ void write_or_die(int fd, const void *buf, size_t count)
                p += written;
        }
 }
+
+int write_or_whine(int fd, const void *buf, size_t count, const char *msg)
+{
+       const char *p = buf;
+       ssize_t written;
+
+       while (count > 0) {
+               written = xwrite(fd, p, count);
+               if (written == 0) {
+                       fprintf(stderr, "%s: disk full?\n", msg);
+                       return 0;
+               }
+               else if (written < 0) {
+                       if (errno == EPIPE)
+                               exit(0);
+                       fprintf(stderr, "%s: write error (%s)\n",
+                               msg, strerror(errno));
+                       return 0;
+               }
+               count -= written;
+               p += written;
+       }
+
+       return 1;
+}