net-print/epson-inkjet-printer-escpr/files/epson-inkjet-printer-escpr-1.8.6-Add-fuzzer.patch

From 4b07c6ad05582a5fe303fc224e86222511a5321a Mon Sep 17 00:00:00 2001
From: Nathan Muggli <nmuggli@google.com>
Date: Fri, 11 Jul 2025 17:53:53 -0600
Subject: [PATCH] Add fuzzer for this epson filter

---
 src/Makefile.am |  8 ++++++++
 src/wrapper.c   | 12 ++++++++++--
 src/wrapper.h   | 10 ++++++++++
 3 files changed, 28 insertions(+), 2 deletions(-)
 create mode 100644 src/wrapper.h

diff --git a/src/Makefile.am b/src/Makefile.am
index d5979de..06e0fad 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -20,6 +20,14 @@ AM_LDFLAGS = -lpthread -lm
 cupsfilterdir = $(CUPS_FILTER_DIR)
 ESCPR_LIB_DIR	=	../escprlib
 
+# fuzzer
+epson_escpr_fuzzerdir = $(cupsfilterdir)
+epson_escpr_fuzzer_PROGRAMS = epson_escpr_fuzzer
+epson_escpr_fuzzer_SOURCES = epson_escpr_fuzzer.c stdin_util.c $(epson_escpr_wrapper_SOURCES)
+epson_escpr_fuzzer_CFLAGS = $(epson_escpr_wrapper_CFLAGS) -DFUZZING
+epson_escpr_fuzzer_LDADD = $(epson_escpr_LDADD)
+epson_escpr_fuzzer_LDFLAGS = -fsanitize=fuzzer
+
 cupsfilter_PROGRAMS =\
 	epson-escpr \
 	epson-escpr-wrapper
diff --git a/src/wrapper.c b/src/wrapper.c
index 71b8afb..ce19049 100644
--- a/src/wrapper.c
+++ b/src/wrapper.c
@@ -21,6 +21,8 @@
 #  include <config.h>
 #endif
 
+#include "wrapper.h"
+
 #include <errno.h>
 #include <cups/cups.h>
 #include <cups/ppd.h>
@@ -83,6 +85,12 @@ static void debug_msg(const char *fmt, ...){
 	return;
 }
 
+#ifndef FUZZING
+int main (int argc, char *argv[]) {
+  return EpsonEscprPrintJob(argc, argv);
+}
+#endif
+
 /*
  * $$$ CUPS Filter Options $$$
  *
@@ -100,7 +108,7 @@ static void debug_msg(const char *fmt, ...){
  * filename - The request file
  */
 int
-main (int argc, char *argv[])
+EpsonEscprPrintJob(int argc, char *argv[])
 {
 	int fd;			/* file descriptor */
 	FILE *pfp;
@@ -438,7 +446,7 @@ get_option_for_ppd (const char *printer, filter_option_t *filter_opt_p)
 	char *tok;
 
 	/* Get option from PPD. */
-	ppd_path = (char *) cupsGetPPD (printer);
+	ppd_path = getenv("PPD");
 	ppd_p = ppdOpenFile (ppd_path);
 	if(NULL == ppd_p){
 		return 1;
diff --git a/src/wrapper.h b/src/wrapper.h
new file mode 100644
index 0000000..4462da0
--- /dev/null
+++ b/src/wrapper.h
@@ -0,0 +1,10 @@
+// Copyright 2025 The ChromiumOS Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef EPSON_INKJET_ESCPR_WRAPPER_H_
+#define EPSON_INKJET_ESCPR_WRAPPER_H_
+
+int EpsonEscprPrintJob(int argc, char *argv[]);
+
+#endif
-- 
2.50.0.727.gbf7dc18ff4-goog