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/* $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);
}
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