1 files changed, 130 insertions, 0 deletions
diff --git a/lib/util/parseln.c b/lib/util/parseln.c
new file mode 100644
index 0000000..ec10d9d
--- /dev/null
+++ b/lib/util/parseln.c
@@ -0,0 +1,130 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2007, 2013-2016 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>
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include <compat/stdbool.h>
+#endif
+
+#include <sudo_compat.h>
+#include <sudo_util.h>
+#include <sudo_debug.h>
+
+/*
+ * Read a line of input, honoring line continuation chars.
+ * Remove comments and strip off leading and trailing spaces.
+ * Returns the line length and updates the buf and bufsize pointers.
+ * XXX - just use a struct w/ state, including getdelim buffer?
+ *       could also make comment char and line continuation configurable
+ */
+ssize_t
+sudo_parseln_v2(char **bufp, size_t *bufsizep, unsigned int *lineno, FILE *fp, int flags)
+{
+    ssize_t len, total = 0;
+    size_t bufsize, linesize = 0;
+    char *cp, *line = NULL;
+    bool continued, comment;
+    debug_decl(sudo_parseln, SUDO_DEBUG_UTIL);
+
+    do {
+	comment = false;
+	continued = false;
+	len = getdelim(&line, &linesize, '\n', fp);
+	if (len == -1)
+	    break;
+	if (lineno != NULL)
+	    (*lineno)++;
+
+	/* Remove trailing newline(s) if present. */
+	while (len > 0 && (line[len - 1] == '\n' || line[len - 1] == '\r'))
+	    line[--len] = '\0';
+
+	/* Remove comments or check for line continuation (but not both) */
+	if ((cp = strchr(line, '#')) != NULL) {
+	    if (cp == line || !ISSET(flags, PARSELN_COMM_BOL)) {
+		*cp = '\0';
+		len = (ssize_t)(cp - line);
+		comment = true;
+	    }
+	}
+	if (!comment && !ISSET(flags, PARSELN_CONT_IGN)) {
+	    if (len > 0 && line[len - 1] == '\\' && (len == 1 || line[len - 2] != '\\')) {
+		line[--len] = '\0';
+		continued = true;
+	    }
+	}
+
+	/* Trim leading and trailing whitespace */
+	if (!continued) {
+	    while (len > 0 && isblank((unsigned char)line[len - 1]))
+		line[--len] = '\0';
+	}
+	for (cp = line; isblank((unsigned char)*cp); cp++)
+	    len--;
+
+	bufsize = (size_t)(total + len + 1);
+	if (*bufp == NULL || bufsize > *bufsizep) {
+	    const size_t newsize = sudo_pow2_roundup(bufsize);
+	    void *newbuf;
+
+	    if (newsize < bufsize) {
+		/* overflow */
+		errno = ENOMEM;
+		sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
+		    "unable to allocate memory");
+		len = -1;
+		total = 0;
+		break;
+	    }
+	    if ((newbuf = realloc(*bufp, newsize)) == NULL) {
+		sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
+		    "unable to allocate memory");
+		len = -1;
+		total = 0;
+		break;
+	    }
+	    *bufp = newbuf;
+	    *bufsizep = newsize;
+	}
+	memcpy(*bufp + total, cp, (size_t)(len + 1));
+	total += len;
+    } while (continued);
+    free(line);
+    if (len == -1 && total == 0)
+	debug_return_ssize_t(-1);
+    debug_return_ssize_t(total);
+}
+
+ssize_t
+sudo_parseln_v1(char **bufp, size_t *bufsizep, unsigned int *lineno, FILE *fp)
+{
+    return sudo_parseln_v2(bufp, bufsizep, lineno, fp, 0);
+}