1 files changed, 90 insertions, 0 deletions
diff --git a/lib/eventlog/logwrap.c b/lib/eventlog/logwrap.c
new file mode 100644
index 0000000..849ccb4
--- /dev/null
+++ b/lib/eventlog/logwrap.c
@@ -0,0 +1,90 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2011, 2014-2020 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>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sudo_compat.h>
+#include <sudo_debug.h>
+#include <sudo_util.h>
+#include <sudo_eventlog.h>
+
+size_t
+eventlog_writeln(FILE * restrict fp, char * restrict line, size_t linelen, size_t maxlen)
+{
+    const char *indent = "";
+    char *beg = line;
+    char *end;
+    int len;
+    size_t outlen = 0;
+    debug_decl(eventlog_writeln, SUDO_DEBUG_UTIL);
+
+    if (maxlen < sizeof(EVENTLOG_INDENT)) {
+	/* Maximum length too small, disable wrapping. */
+	outlen = fwrite(line, 1, linelen, fp);
+	if (outlen != linelen)
+	    debug_return_size_t((size_t)-1);
+	if (fputc('\n', fp) == EOF)
+	    debug_return_size_t((size_t)-1);
+	debug_return_size_t(outlen + 1);
+    }
+
+    /*
+     * Print out line with word wrap around maxlen characters.
+     */
+    while (linelen > maxlen) {
+	end = beg + maxlen;
+	while (end != beg && *end != ' ')
+	    end--;
+	if (beg == end) {
+	    /* Unable to find word break within maxlen, look beyond. */
+	    end = strchr(beg + maxlen, ' ');
+	    if (end == NULL)
+		break;	/* no word break */
+	}
+	len = fprintf(fp, "%s%.*s\n", indent, (int)(end - beg), beg);
+	if (len < 0)
+	    debug_return_size_t((size_t)-1);
+	outlen += (size_t)len;
+	while (*end == ' ')
+	    end++;
+	linelen -= (size_t)(end - beg);
+	beg = end;
+	if (indent[0] == '\0') {
+	    indent = EVENTLOG_INDENT;
+	    maxlen -= sizeof(EVENTLOG_INDENT) - 1;
+	}
+    }
+    /* Print remainder, if any. */
+    if (linelen) {
+	len = fprintf(fp, "%s%s\n", indent, beg);
+	if (len < 0)
+	    debug_return_size_t((size_t)-1);
+	outlen += (size_t)len;
+    }
+
+    debug_return_size_t(outlen);
+}