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Annotation of src/usr.bin/rsync/misc.c, Revision 1.3

1.3     ! claudio     1: /* $OpenBSD: misc.c,v 1.2 2021/03/22 11:14:42 claudio Exp $ */
1.1       deraadt     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
1.2       claudio    37: addargs(arglist *args, const char *fmt, ...)
1.1       deraadt    38: {
1.2       claudio    39:        va_list  ap;
                     40:        char    *cp;
                     41:        u_int    nalloc;
                     42:        int      r;
1.1       deraadt    43:
                     44:        va_start(ap, fmt);
                     45:        r = vasprintf(&cp, fmt, ap);
                     46:        va_end(ap);
                     47:        if (r == -1)
1.3     ! claudio    48:                err(ERR_NOMEM, "addargs: argument too long");
1.1       deraadt    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:
1.3     ! claudio    57:        args->list = recallocarray(args->list, args->nalloc, nalloc,
        !            58:            sizeof(char *));
1.1       deraadt    59:        if (!args->list)
1.3     ! claudio    60:                err(ERR_NOMEM, NULL);
1.1       deraadt    61:        args->nalloc = nalloc;
                     62:        args->list[args->num++] = cp;
                     63:        args->list[args->num] = NULL;
                     64: }
                     65:
                     66: void
                     67: freeargs(arglist *args)
                     68: {
                     69:        u_int i;
                     70:
                     71:        if (args->list != NULL) {
                     72:                for (i = 0; i < args->num; i++)
                     73:                        free(args->list[i]);
                     74:                free(args->list);
                     75:                args->nalloc = args->num = 0;
                     76:                args->list = NULL;
                     77:        }
                     78: }