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Annotation of src/usr.bin/rcs/worklist.c, Revision 1.1

1.1     ! joris       1: /*     $OpenBSD: worklist.c,v 1.5 2006/04/05 01:38:56 ray 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 "includes.h"
        !            28:
        !            29: #include "worklist.h"
        !            30: #include "xmalloc.h"
        !            31:
        !            32: /*
        !            33:  * adds a path to a worklist.
        !            34:  */
        !            35: void
        !            36: rcs_worklist_add(const char *path, struct rcs_wklhead *worklist)
        !            37: {
        !            38:        size_t len;
        !            39:        struct rcs_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:                errx(1, "path truncation in rcs_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 rcs_worklist_clean(), except we block signals first.
        !            57:  */
        !            58: void
        !            59: rcs_worklist_run(struct rcs_wklhead *list, void (*cb)(struct rcs_worklist *))
        !            60: {
        !            61:        sigset_t old, new;
        !            62:        struct rcs_worklist *wkl;
        !            63:
        !            64:        sigfillset(&new);
        !            65:        sigprocmask(SIG_BLOCK, &new, &old);
        !            66:
        !            67:        rcs_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: rcs_worklist_clean(struct rcs_wklhead *list, void (*cb)(struct rcs_worklist *))
        !            82: {
        !            83:        struct rcs_worklist *wkl;
        !            84:
        !            85:        SLIST_FOREACH(wkl, list, wkl_list)
        !            86:            cb(wkl);
        !            87: }
        !            88:
        !            89: void
        !            90: rcs_worklist_unlink(struct rcs_worklist *wkl)
        !            91: {
        !            92:        (void)unlink(wkl->wkl_path);
        !            93: }