76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
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/*-
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* Copyright (c) 2012 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <security/pam_appl.h>
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#include "openpam_impl.h"
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/*
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* OpenPAM extension
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*
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* Add a character to a string, expanding the buffer if needed.
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*/
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int
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openpam_straddch(char **str, size_t *size, size_t *len, char ch)
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{
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char *tmp;
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if (*str == NULL) {
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/* initial allocation */
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if ((*str = malloc(*size = 32)) == NULL) {
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openpam_log(PAM_LOG_ERROR, "malloc(): %m");
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return (-1);
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}
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*len = 0;
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} else if (*len >= *size - 1) {
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/* additional space required */
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if ((tmp = realloc(*str, *size *= 2)) == NULL) {
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openpam_log(PAM_LOG_ERROR, "realloc(): %m");
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free(*str);
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*str = NULL;
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return (-1);
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}
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*str = tmp;
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}
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(*str)[*len] = ch;
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++*len;
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(*str)[*len] = '\0';
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return (0);
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}
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/*
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* NODOC
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*/
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