1 /* $OpenBSD: worklist.c,v 1.2 2007/02/27 07:59:13 xsa 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 <sys/queue.h> 28 29 #include <err.h> 30 #include <signal.h> 31 #include <string.h> 32 #include <unistd.h> 33 34 #include "worklist.h" 35 #include "xmalloc.h" 36 37 /* 38 * adds a path to a worklist. 39 */ 40 void 41 rcs_worklist_add(const char *path, struct rcs_wklhead *worklist) 42 { 43 size_t len; 44 struct rcs_worklist *wkl; 45 sigset_t old, new; 46 47 wkl = xcalloc(1, sizeof(*wkl)); 48 49 len = strlcpy(wkl->wkl_path, path, sizeof(wkl->wkl_path)); 50 if (len >= sizeof(wkl->wkl_path)) 51 errx(1, "path truncation in rcs_worklist_add"); 52 53 sigfillset(&new); 54 sigprocmask(SIG_BLOCK, &new, &old); 55 SLIST_INSERT_HEAD(worklist, wkl, wkl_list); 56 sigprocmask(SIG_SETMASK, &old, NULL); 57 } 58 59 /* 60 * run over the given worklist, calling cb for each element. 61 * this is just like rcs_worklist_clean(), except we block signals first. 62 */ 63 void 64 rcs_worklist_run(struct rcs_wklhead *list, void (*cb)(struct rcs_worklist *)) 65 { 66 sigset_t old, new; 67 struct rcs_worklist *wkl; 68 69 sigfillset(&new); 70 sigprocmask(SIG_BLOCK, &new, &old); 71 72 rcs_worklist_clean(list, cb); 73 74 while ((wkl = SLIST_FIRST(list)) != NULL) { 75 SLIST_REMOVE_HEAD(list, wkl_list); 76 xfree(wkl); 77 } 78 79 sigprocmask(SIG_SETMASK, &old, NULL); 80 } 81 82 /* 83 * pass elements to the specified callback, which has to be signal safe. 84 */ 85 void 86 rcs_worklist_clean(struct rcs_wklhead *list, void (*cb)(struct rcs_worklist *)) 87 { 88 struct rcs_worklist *wkl; 89 90 SLIST_FOREACH(wkl, list, wkl_list) 91 cb(wkl); 92 } 93 94 void 95 rcs_worklist_unlink(struct rcs_worklist *wkl) 96 { 97 (void)unlink(wkl->wkl_path); 98 } 99