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 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 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 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 91 worklist_unlink(struct worklist *wkl) 92 { 93 (void)unlink(wkl->wkl_path); 94 } 95