Introduce usagef() that takes a printf-style format

diff --git a/hash-object.c b/hash-object.c
index 47cf43c3cdd2bcd7638360a130fc8ef04ce132e9..9455dd0709aeb81436ef2e3e36422578d66ce8e7 100644 (file)
--- a/hash-object.c
+++ b/hash-object.c
@@ -29,7 +29,7 @@ static void hash_object(const char *path, const char *type, int write_object,
        int fd;
        fd = open(path, O_RDONLY);
        if (fd < 0)
-               die("Cannot open %s", path);
+               die_errno("Cannot open '%s'", path);
        hash_fd(fd, type, write_object, vpath);
 }