1 files changed, 83 insertions, 0 deletions
diff --git a/lib/util/getdelim.c b/lib/util/getdelim.c
new file mode 100644
index 0000000..1c95705
--- /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 */