update-index: do not die too early in a read-only repository.

diff --git a/builtin-grep.c b/builtin-grep.c
index 3b1b1cbbfa7bf348c17c025afa217ffff97087e3..2bfbdb71407dcd0ddfe970f6a614158d954cd4c0 100644 (file)
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -136,7 +136,7 @@ static int grep_file(struct grep_opt *opt, const char *filename)
        if (i < 0)
                goto err_ret;
        data = xmalloc(st.st_size + 1);
-       if (st.st_size != xread(i, data, st.st_size)) {
+       if (st.st_size != read_in_full(i, data, st.st_size)) {
                error("'%s': short read %s", filename, strerror(errno));
                close(i);
                free(data);