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-rw-r--r--lib/util/getdelim.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/lib/util/getdelim.c b/lib/util/getdelim.c
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--- /dev/null
+++ b/lib/util/getdelim.c
@@ -0,0 +1,83 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#ifndef HAVE_GETDELIM
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+
+#include <sudo_compat.h>
+
+ssize_t
+sudo_getdelim(char ** restrict buf, size_t * restrict bufsize, int delim,
+ FILE * restrict fp)
+{
+ char *cp, *ep;
+ int ch;
+
+ if (*buf == NULL || *bufsize == 0) {
+ char *tmp = realloc(*buf, LINE_MAX);
+ if (tmp == NULL)
+ return -1;
+ *buf = tmp;
+ *bufsize = LINE_MAX;
+ }
+ cp = *buf;
+ ep = cp + *bufsize;
+
+ do {
+ if (cp + 1 >= ep) {
+ char *newbuf = reallocarray(*buf, *bufsize, 2);
+ if (newbuf == NULL)
+ goto bad;
+ *bufsize *= 2;
+ cp = newbuf + (cp - *buf);
+ ep = newbuf + *bufsize;
+ *buf = newbuf;
+ }
+ if ((ch = getc(fp)) == EOF) {
+ if (feof(fp))
+ break;
+ goto bad;
+ }
+ *cp++ = ch;
+ } while (ch != delim);
+
+ /* getdelim(3) should never return a length of 0. */
+ if (cp != *buf) {
+ *cp = '\0';
+ return (ssize_t)(cp - *buf);
+ }
+bad:
+ /* Error, push back what was read if possible. */
+ while (cp > *buf) {
+ if (ungetc(*cp--, fp) == EOF)
+ break;
+ }
+ return -1;
+}
+#endif /* HAVE_GETDELIM */