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Annotation of src/usr.bin/rcs/worklist.c, Revision 1.3

1.3     ! ray         1: /*     $OpenBSD: worklist.c,v 1.2 2007/02/27 07:59:13 xsa Exp $        */
1.1       joris       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:
1.2       xsa        27: #include <sys/queue.h>
                     28:
                     29: #include <err.h>
                     30: #include <signal.h>
                     31: #include <string.h>
                     32: #include <unistd.h>
1.1       joris      33:
                     34: #include "worklist.h"
                     35: #include "xmalloc.h"
                     36:
                     37: /*
                     38:  * adds a path to a worklist.
                     39:  */
                     40: void
1.3     ! ray        41: worklist_add(const char *path, struct wklhead *worklist)
1.1       joris      42: {
                     43:        size_t len;
1.3     ! ray        44:        struct worklist *wkl;
1.1       joris      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))
1.3     ! ray        51:                errx(1, "path truncation in worklist_add");
1.1       joris      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.
1.3     ! ray        61:  * this is just like worklist_clean(), except we block signals first.
1.1       joris      62:  */
                     63: void
1.3     ! ray        64: worklist_run(struct wklhead *list, void (*cb)(struct worklist *))
1.1       joris      65: {
                     66:        sigset_t old, new;
1.3     ! ray        67:        struct worklist *wkl;
1.1       joris      68:
                     69:        sigfillset(&new);
                     70:        sigprocmask(SIG_BLOCK, &new, &old);
                     71:
1.3     ! ray        72:        worklist_clean(list, cb);
1.1       joris      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
1.3     ! ray        86: worklist_clean(struct wklhead *list, void (*cb)(struct worklist *))
1.1       joris      87: {
1.3     ! ray        88:        struct worklist *wkl;
1.1       joris      89:
                     90:        SLIST_FOREACH(wkl, list, wkl_list)
                     91:            cb(wkl);
                     92: }
                     93:
                     94: void
1.3     ! ray        95: worklist_unlink(struct worklist *wkl)
1.1       joris      96: {
                     97:        (void)unlink(wkl->wkl_path);
                     98: }