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Annotation of src/usr.bin/rsync/misc.c, Revision 1.1

1.1     ! deraadt     1: /* $OpenBSD: misc.c,v 1.137 2019/01/23 21:50:56 dtucker Exp $ */
        !             2: /*
        !             3:  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
        !             4:  * Copyright (c) 2005,2006 Damien Miller.  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:  * 1. Redistributions of source code must retain the above copyright
        !            10:  *    notice, this list of conditions and the following disclaimer.
        !            11:  * 2. Redistributions in binary form must reproduce the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer in the
        !            13:  *    documentation and/or other materials provided with the distribution.
        !            14:  *
        !            15:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            17:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            18:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            19:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            20:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            21:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            22:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            23:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            24:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            25:  */
        !            26:
        !            27: #include <stdlib.h>
        !            28: #include <unistd.h>
        !            29: #include <stdio.h>
        !            30: #include <stdarg.h>
        !            31: #include <err.h>
        !            32:
        !            33: #include "extern.h"
        !            34:
        !            35: /* function to assist building execv() arguments */
        !            36: void
        !            37: addargs(arglist *args, char *fmt, ...)
        !            38: {
        !            39:        va_list ap;
        !            40:        char *cp;
        !            41:        u_int nalloc;
        !            42:        int r;
        !            43:
        !            44:        va_start(ap, fmt);
        !            45:        r = vasprintf(&cp, fmt, ap);
        !            46:        va_end(ap);
        !            47:        if (r == -1)
        !            48:                err(1, "addargs: argument too long");
        !            49:
        !            50:        nalloc = args->nalloc;
        !            51:        if (args->list == NULL) {
        !            52:                nalloc = 32;
        !            53:                args->num = 0;
        !            54:        } else if (args->num+2 >= nalloc)
        !            55:                nalloc *= 2;
        !            56:
        !            57:        args->list = recallocarray(args->list, args->nalloc, nalloc, sizeof(char *));
        !            58:        if (!args->list)
        !            59:                err(1, "malloc");
        !            60:        args->nalloc = nalloc;
        !            61:        args->list[args->num++] = cp;
        !            62:        args->list[args->num] = NULL;
        !            63: }
        !            64:
        !            65: void
        !            66: freeargs(arglist *args)
        !            67: {
        !            68:        u_int i;
        !            69:
        !            70:        if (args->list != NULL) {
        !            71:                for (i = 0; i < args->num; i++)
        !            72:                        free(args->list[i]);
        !            73:                free(args->list);
        !            74:                args->nalloc = args->num = 0;
        !            75:                args->list = NULL;
        !            76:        }
        !            77: }