mirror of https://github.com/sudo-project/sudo.git
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* This is an open source non-commercial project. Dear PVS-Studio, please check it.
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* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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#include <config.h>
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#ifndef HAVE_GETDELIM
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <sudo_compat.h>
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ssize_t
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sudo_getdelim(char ** restrict buf, size_t * restrict bufsize, int delim,
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FILE * restrict fp)
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{
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char *cp, *ep;
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int ch;
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if (*buf == NULL || *bufsize == 0) {
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char *tmp = realloc(*buf, LINE_MAX);
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if (tmp == NULL)
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return -1;
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*buf = tmp;
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*bufsize = LINE_MAX;
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}
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cp = *buf;
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ep = cp + *bufsize;
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do {
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if (cp + 1 >= ep) {
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char *newbuf = reallocarray(*buf, *bufsize, 2);
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if (newbuf == NULL)
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goto bad;
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*bufsize *= 2;
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cp = newbuf + (cp - *buf);
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ep = newbuf + *bufsize;
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*buf = newbuf;
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}
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if ((ch = getc(fp)) == EOF) {
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if (feof(fp))
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break;
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goto bad;
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}
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*cp++ = ch;
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} while (ch != delim);
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/* getdelim(3) should never return a length of 0. */
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if (cp != *buf) {
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*cp = '\0';
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return (ssize_t)(cp - *buf);
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}
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bad:
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/* Error, push back what was read if possible. */
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while (cp > *buf) {
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if (ungetc(*cp--, fp) == EOF)
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break;
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}
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return -1;
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}
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#endif /* HAVE_GETDELIM */
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