1 /* $OpenBSD: worklist.c,v 1.6 2007/02/22 06:42:10 otto 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 <string.h> 28 #include <unistd.h> 29 30 #include "cvs.h" 31 32 /* 33 * adds a path to a worklist. 34 */ 35 void 36 cvs_worklist_add(const char *path, struct cvs_wklhead *worklist) 37 { 38 size_t len; 39 struct cvs_worklist *wkl; 40 sigset_t old, new; 41 42 wkl = xcalloc(1, sizeof(*wkl)); 43 44 len = strlcpy(wkl->wkl_path, path, sizeof(wkl->wkl_path)); 45 if (len >= sizeof(wkl->wkl_path)) 46 fatal("path truncation in cvs_worklist_add"); 47 48 sigfillset(&new); 49 sigprocmask(SIG_BLOCK, &new, &old); 50 SLIST_INSERT_HEAD(worklist, wkl, wkl_list); 51 sigprocmask(SIG_SETMASK, &old, NULL); 52 } 53 54 /* 55 * run over the given worklist, calling cb for each element. 56 * this is just like cvs_worklist_clean(), except we block signals first. 57 */ 58 void 59 cvs_worklist_run(struct cvs_wklhead *list, void (*cb)(struct cvs_worklist *)) 60 { 61 sigset_t old, new; 62 struct cvs_worklist *wkl; 63 64 sigfillset(&new); 65 sigprocmask(SIG_BLOCK, &new, &old); 66 67 cvs_worklist_clean(list, cb); 68 69 while ((wkl = SLIST_FIRST(list)) != NULL) { 70 SLIST_REMOVE_HEAD(list, wkl_list); 71 xfree(wkl); 72 } 73 74 sigprocmask(SIG_SETMASK, &old, NULL); 75 } 76 77 /* 78 * pass elements to the specified callback, which has to be signal safe. 79 */ 80 void 81 cvs_worklist_clean(struct cvs_wklhead *list, void (*cb)(struct cvs_worklist *)) 82 { 83 struct cvs_worklist *wkl; 84 85 SLIST_FOREACH(wkl, list, wkl_list) 86 cb(wkl); 87 } 88 89 void 90 cvs_worklist_unlink(struct cvs_worklist *wkl) 91 { 92 (void)unlink(wkl->wkl_path); 93 } 94