mkhtemp: fix bad close

the fd in fs_resolve_at is subsequently used

note that in practise, this is not a real fix:
the best fix is to cache all descriptors and
free them at the end, once resolution is done.

not a real fix, because now fd leaks,
but it's dealt with on program close.

not a util yet. just just stubbing this in
main to test various features.

Signed-off-by: Leah Rowe <leah@libreboot.org>

util/nvmutil/lib/file.c

@@ -2032,9 +2032,34 @@ fs_resolve_at(int dirfd, const char *path, int flags)
 		if (nextfd < 0)
 			goto err;
 
+/*
+don't close fd.
+it's used next by a few functions.
+this results in a fd leak, but
+makes the code work:
+in practise, your program
+will free all descriptors
+on exit
+
+what we need to do is figure out a proper
+system of storing descriptors,
+and freeing them when it's safe;
+see how this function is called
+and whatt calls those and you see what i mean
+
+who owns what is currently not consistent.
+needs rework.
+
+this will be fixed at a later date.
+justt leaving thtis in here for future me.
+
+with this uncommented, i always just get
+"Bad file descriptor" error:
+
 		saved_close_errno = errno;
 		(void) close_on_eintr(dirfd);
 		errno = saved_close_errno;
+*/
 
 		dirfd = nextfd;
 		nextfd = -1;

util/nvmutil/nvmutil.c

@@ -35,6 +35,16 @@ main(int argc, char *argv[])
 
 	size_t c;
 
+	int rval;
+	char *test = NULL;
+	int fd = -1;
+	rval = new_tmpfile(&fd, &test);
+	if (rval < 0)
+		err_no_cleanup(errno, "TESTERR: ");
+
+	printf("TEST: %s", test);
+	exit(1);
+
 /* https://man.openbsd.org/pledge.2
    https://man.openbsd.org/unveil.2     */
 #if defined(__OpenBSD__) && defined(OpenBSD)