1 files changed, 90 insertions, 0 deletions
diff --git a/plugins/sudoers/sudo_printf.c b/plugins/sudoers/sudo_printf.c
new file mode 100644
index 0000000..f5ca602
--- /dev/null
+++ b/plugins/sudoers/sudo_printf.c
@@ -0,0 +1,90 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2010-2012 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 <stdarg.h>
+#include <errno.h>
+
+#include <sudo_compat.h>
+#include <sudo_util.h>
+#include <sudo_plugin.h>
+#include <sudo_debug.h>
+#include <pathnames.h>
+
+static int
+sudo_printf_int(int msg_type, const char * restrict fmt, ...)
+{
+    FILE *fp = stdout;
+    FILE *ttyfp = NULL;
+    char sbuf[8192];
+    char *buf = sbuf;
+    va_list ap;
+    int len;
+
+    if (ISSET(msg_type, SUDO_CONV_PREFER_TTY)) {
+	/* Try writing to /dev/tty first. */
+	ttyfp = fopen(_PATH_TTY, "w");
+    }
+
+    switch (msg_type & 0xff) {
+    case SUDO_CONV_ERROR_MSG:
+	fp = stderr;
+	FALLTHROUGH;
+    case SUDO_CONV_INFO_MSG:
+	/*
+	 * We use vsnprintf() instead of vfprintf() here to avoid
+	 * problems on systems where the system printf(3) is not
+	 * C99-compliant.  We use our own snprintf() on such systems.
+	 */
+	va_start(ap, fmt);
+	len = vsnprintf(sbuf, sizeof(sbuf), fmt, ap);
+	va_end(ap);
+	if (len < 0 || len >= ssizeof(sbuf)) {
+	    /* Try again with a dynamically-sized buffer. */
+	    va_start(ap, fmt);
+	    len = vasprintf(&buf, fmt, ap);
+	    va_end(ap);
+	}
+	if (len != -1) {
+	    if (fwrite(buf, 1, len, ttyfp ? ttyfp : fp) == 0)
+		len = -1;
+	    if (buf != sbuf)
+		free(buf);
+	}
+	break;
+    default:
+	len = -1;
+	errno = EINVAL;
+	break;
+    }
+
+    if (ttyfp != NULL)
+	fclose(ttyfp);
+
+    return len;
+}
+
+sudo_printf_t sudo_printf = sudo_printf_int;