thodg/got

diff --git a/lib/worklist.c b/lib/worklist.c
new file mode 100644
index 0000000..4dd7004
--- /dev/null
+++ b/lib/worklist.c
@@ -0,0 +1,99 @@
+/*	$OpenBSD: worklist.c,v 1.4 2015/06/13 20:15:21 nicm Exp $	*/
+/*
+ * Copyright (c) 2006 Joris Vink <joris@openbsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/queue.h>
+
+#include <err.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "worklist.h"
+#include "xmalloc.h"
+
+/*
+ * adds a path to a worklist.
+ */
+void
+worklist_add(const char *path, struct wklhead *worklist)
+{
+	size_t len;
+	struct worklist *wkl;
+	sigset_t old, new;
+
+	wkl = xcalloc(1, sizeof(*wkl));
+
+	len = strlcpy(wkl->wkl_path, path, sizeof(wkl->wkl_path));
+	if (len >= sizeof(wkl->wkl_path))
+		errx(1, "path truncation in worklist_add");
+
+	sigfillset(&new);
+	sigprocmask(SIG_BLOCK, &new, &old);
+	SLIST_INSERT_HEAD(worklist, wkl, wkl_list);
+	sigprocmask(SIG_SETMASK, &old, NULL);
+}
+
+/*
+ * run over the given worklist, calling cb for each element.
+ * this is just like worklist_clean(), except we block signals first.
+ */
+void
+worklist_run(struct wklhead *list, void (*cb)(struct worklist *))
+{
+	sigset_t old, new;
+	struct worklist *wkl;
+
+	sigfillset(&new);
+	sigprocmask(SIG_BLOCK, &new, &old);
+
+	worklist_clean(list, cb);
+
+	while ((wkl = SLIST_FIRST(list)) != NULL) {
+		SLIST_REMOVE_HEAD(list, wkl_list);
+		free(wkl);
+	}
+
+	sigprocmask(SIG_SETMASK, &old, NULL);
+}
+
+/*
+ * pass elements to the specified callback, which has to be signal safe.
+ */
+void
+worklist_clean(struct wklhead *list, void (*cb)(struct worklist *))
+{
+	struct worklist *wkl;
+
+	SLIST_FOREACH(wkl, list, wkl_list)
+	    cb(wkl);
+}
+
+void
+worklist_unlink(struct worklist *wkl)
+{
+	(void)unlink(wkl->wkl_path);
+}
diff --git a/lib/worklist.h b/lib/worklist.h
new file mode 100644
index 0000000..cf833e8
--- /dev/null
+++ b/lib/worklist.h
@@ -0,0 +1,48 @@
+/*	$OpenBSD: worklist.h,v 1.4 2015/01/16 06:40:11 deraadt Exp $	*/
+/*
+ * Copyright (c) 2006 Joris Vink <joris@openbsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef WORKLIST_H
+#define WORKLIST_H
+
+#include <sys/types.h>
+#include <limits.h>
+
+struct worklist {
+	char				wkl_path[PATH_MAX];
+	volatile SLIST_ENTRY(worklist)	wkl_list;
+};
+
+SLIST_HEAD(wklhead, worklist);
+
+void worklist_add(const char *, struct wklhead *);
+void worklist_run(struct wklhead *, void (*cb)(struct worklist *));
+void worklist_clean(struct wklhead *, void (*cb)(struct worklist *));
+
+void worklist_unlink(struct worklist *);
+
+extern struct wklhead temp_files;
+
+#endif