1 /* $OpenBSD: worklist.c,v 1.8 2015/11/05 09:48:21 nicm Exp $ */
2 /*
3 * Copyright (c) 2006 Joris Vink <joris@openbsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
16 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
17 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
18 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <stdlib.h>
28 #include <string.h>
29 #include <unistd.h>
30
31 #include "cvs.h"
32
33 /*
34 * adds a path to a worklist.
35 */
36 void
worklist_add(const char * path,struct wklhead * worklist)37 worklist_add(const char *path, struct wklhead *worklist)
38 {
39 size_t len;
40 struct worklist *wkl;
41 sigset_t old, new;
42
43 wkl = xcalloc(1, sizeof(*wkl));
44
45 len = strlcpy(wkl->wkl_path, path, sizeof(wkl->wkl_path));
46 if (len >= sizeof(wkl->wkl_path))
47 fatal("path truncation in worklist_add");
48
49 sigfillset(&new);
50 sigprocmask(SIG_BLOCK, &new, &old);
51 SLIST_INSERT_HEAD(worklist, wkl, wkl_list);
52 sigprocmask(SIG_SETMASK, &old, NULL);
53 }
54
55 /*
56 * run over the given worklist, calling cb for each element.
57 * this is just like worklist_clean(), except we block signals first.
58 */
59 void
worklist_run(struct wklhead * list,void (* cb)(struct worklist *))60 worklist_run(struct wklhead *list, void (*cb)(struct worklist *))
61 {
62 sigset_t old, new;
63 struct worklist *wkl;
64
65 sigfillset(&new);
66 sigprocmask(SIG_BLOCK, &new, &old);
67
68 worklist_clean(list, cb);
69
70 while ((wkl = SLIST_FIRST(list)) != NULL) {
71 SLIST_REMOVE_HEAD(list, wkl_list);
72 free(wkl);
73 }
74
75 sigprocmask(SIG_SETMASK, &old, NULL);
76 }
77
78 /*
79 * pass elements to the specified callback, which has to be signal safe.
80 */
81 void
worklist_clean(struct wklhead * list,void (* cb)(struct worklist *))82 worklist_clean(struct wklhead *list, void (*cb)(struct worklist *))
83 {
84 struct worklist *wkl;
85
86 SLIST_FOREACH(wkl, list, wkl_list)
87 cb(wkl);
88 }
89
90 void
worklist_unlink(struct worklist * wkl)91 worklist_unlink(struct worklist *wkl)
92 {
93 (void)unlink(wkl->wkl_path);
94 }
95