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-rw-r--r--include/config.h16
-rw-r--r--include/debug.h72
-rw-r--r--include/envs.h4
3 files changed, 86 insertions, 6 deletions
diff --git a/include/config.h b/include/config.h
index 1eb6bc5e..d57ef223 100644
--- a/include/config.h
+++ b/include/config.h
@@ -36,11 +36,27 @@
  *                                                    *
  ******************************************************/
 
+/* console output colors: There are three ways to configure its behavior
+ * 1. default: colored outputs fixed on: defined USE_COLOR && defined ALWAYS_COLORED
+ *    The env var. AFL_NO_COLOR will have no effect
+ * 2. defined USE_COLOR && !defined ALWAYS_COLORED
+ *    -> depending on env var AFL_NO_COLOR=1 colors can be switched off
+ *    at run-time. Default is to use colors.
+ * 3. colored outputs fixed off: !defined USE_COLOR
+ *    The env var. AFL_NO_COLOR will have no effect
+*/
+
 /* Comment out to disable terminal colors (note that this makes afl-analyze
    a lot less nice): */
 
 #define USE_COLOR
 
+#ifdef USE_COLOR
+/* Comment in to always enable terminal colors */
+/* Comment out to enable runtime controlled terminal colors via AFL_NO_COLOR */
+#define ALWAYS_COLORED  1
+#endif
+
 /* StatsD config
    Config can be adjusted via AFL_STATSD_HOST and AFL_STATSD_PORT environment
    variable.
diff --git a/include/debug.h b/include/debug.h
index 5512023c..7a1725b5 100644
--- a/include/debug.h
+++ b/include/debug.h
@@ -168,12 +168,72 @@
  * Debug & error macros *
  ************************/
 
-/* Just print stuff to the appropriate stream. */
+#if defined USE_COLOR && !defined ALWAYS_COLORED
+#include <unistd.h>
+#pragma GCC diagnostic ignored "-Wformat-security"
+static inline const char * colorfilter(const char * x) {
+  static int once = 1;
+  static int disabled = 0;
+
+  if (once) {
+    /* when there is no tty -> we always want filtering
+     * when AFL_NO_UI is set filtering depends on AFL_NO_COLOR
+     * otherwise we want always colors
+     */
+    disabled = isatty(2) && (!getenv("AFL_NO_UI") || (!getenv("AFL_NO_COLOR") && !getenv("AFL_NO_COLOUR")));
+    once = 0;
+  }
+  if (likely(disabled)) return x;
+
+  static char monochromestring[4096];
+  char *d = monochromestring;
+  int in_seq = 0;
+
+  while(*x) {
+    if (in_seq && *x == 'm') {
+      in_seq = 0;
+    } else {
+      if (!in_seq && *x == '\x1b') { in_seq = 1; }
+      if (!in_seq) {
+        *d++ = *x;
+      }
+    }
+    ++x;
+  }
+
+  *d = '\0';
+  return monochromestring;
+}
+#else
+#define colorfilter(x) x /* no filtering necessary */
+#endif
 
+/* macro magic to transform the first parameter to SAYF
+ * through colorfilter which strips coloring */
+#define GET_MACRO(_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,\
+_11,_12,_13,_14,_15,_16,_17,_18,_19,_20,\
+_21,_22,_23,_24,_25,_26,_27,_28,_29,_30,\
+_31,_32,_33,_34,_35,_36,_37,_38,_39,_40,\
+NAME,...) NAME
+
+#define SAYF(...) GET_MACRO(__VA_ARGS__, \
+SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
+SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
+SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
+SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
+SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
+SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
+SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_N, \
+SAYF_N, SAYF_N, SAYF_N, SAYF_N, SAYF_1)(__VA_ARGS__)
+
+#define SAYF_1(x)  MY_SAYF(colorfilter(x))
+#define SAYF_N(x,...)  MY_SAYF(colorfilter(x), __VA_ARGS__)
+
+/* Just print stuff to the appropriate stream. */
 #ifdef MESSAGES_TO_STDOUT
-  #define SAYF(x...) printf(x)
+  #define MY_SAYF(x...) printf(x)
 #else
-  #define SAYF(x...) fprintf(stderr, x)
+  #define MY_SAYF(x...) fprintf(stderr, x)
 #endif                                               /* ^MESSAGES_TO_STDOUT */
 
 /* Show a prefixed warning. */
@@ -222,7 +282,7 @@
   do {                                                                   \
                                                                          \
     SAYF(bSTOP RESET_G1 CURSOR_SHOW cRST cLRD                            \
-         "\n[-] PROGRAM ABORT : " cRST   x);                               \
+         "\n[-] PROGRAM ABORT : " cRST x);                               \
     SAYF(cLRD "\n         Location : " cRST "%s(), %s:%u\n\n", __func__, \
          __FILE__, __LINE__);                                            \
     exit(1);                                                             \
@@ -235,7 +295,7 @@
   do {                                                                   \
                                                                          \
     SAYF(bSTOP RESET_G1 CURSOR_SHOW cRST cLRD                            \
-         "\n[-] PROGRAM ABORT : " cRST   x);                               \
+         "\n[-] PROGRAM ABORT : " cRST x);                               \
     SAYF(cLRD "\n    Stop location : " cRST "%s(), %s:%u\n\n", __func__, \
          __FILE__, __LINE__);                                            \
     abort();                                                             \
@@ -249,7 +309,7 @@
                                                                        \
     fflush(stdout);                                                    \
     SAYF(bSTOP RESET_G1 CURSOR_SHOW cRST cLRD                          \
-         "\n[-]  SYSTEM ERROR : " cRST   x);                             \
+         "\n[-]  SYSTEM ERROR : " cRST x);                             \
     SAYF(cLRD "\n    Stop location : " cRST "%s(), %s:%u\n", __func__, \
          __FILE__, __LINE__);                                          \
     SAYF(cLRD "       OS message : " cRST "%s\n", strerror(errno));    \
diff --git a/include/envs.h b/include/envs.h
index c0f41ca5..f16e61f0 100644
--- a/include/envs.h
+++ b/include/envs.h
@@ -103,6 +103,10 @@ static char *afl_environment_variables[] = {
     "AFL_NO_ARITH",
     "AFL_NO_AUTODICT",
     "AFL_NO_BUILTIN",
+#if defined USE_COLOR && ! defined ALWAYS_COLORED
+    "AFL_NO_COLOR",
+    "AFL_NO_COLOUR",
+#endif
     "AFL_NO_CPU_RED",
     "AFL_NO_FORKSRV",
     "AFL_NO_UI",