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-rw-r--r--lib/eventlog/logwrap.c90
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..2e69948
--- /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 *fp, char *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_ssize_t(-1);
+ if (fputc('\n', fp) == EOF)
+ debug_return_ssize_t(-1);
+ debug_return_int(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_ssize_t(-1);
+ outlen += len;
+ while (*end == ' ')
+ end++;
+ linelen -= (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_ssize_t(-1);
+ outlen += len;
+ }
+
+ debug_return_size_t(outlen);
+}