Merge pull request #544 from ThomasTNO/export_env_vars

Export set afl_environment_variables to stats

README.md

@@ -1035,6 +1035,7 @@ without feedback, bug reports, or patches from:
   Andrea Biondo                         Vincent Le Garrec
   Khaled Yakdan                         Kuang-che Wu
   Josephine Calliotte                   Konrad Welc
+  Thomas Rooijakkers
 ```
 
 Thank you!

include/afl-fuzz.h

@@ -945,6 +945,7 @@ void destroy_extras(afl_state_t *);
 
 /* Stats */
 
+void write_fuzzer_config_file(afl_state_t *);
 void write_stats_file(afl_state_t *, double, double, double);
 void maybe_update_plot_file(afl_state_t *, double, double);
 void show_stats(afl_state_t *);

src/afl-fuzz-stats.c

@@ -24,8 +24,57 @@
  */
 
 #include "afl-fuzz.h"
+#include "envs.h"
 #include <limits.h>
 
+/* Open file for writing */
+
+inline FILE *open_file(const char *fn) {
+
+  s32   fd;
+  FILE *f;
+
+  fd = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0600);
+
+  if (fd < 0) { PFATAL("Unable to create '%s'", fn); }
+
+  f = fdopen(fd, "w");
+
+  if (!f) { PFATAL("fdopen() failed"); }
+
+  return f;
+
+}
+
+/* Write fuzzer setup file */
+
+void write_fuzzer_config_file(afl_state_t *afl) {
+
+  u8    fn[PATH_MAX];
+  FILE *f;
+
+  snprintf(fn, PATH_MAX, "%s/fuzzer_config", afl->out_dir);
+  f = open_file(fn);
+
+  char *val;
+
+  uint32_t s_afl_env =
+      sizeof(afl_environment_variables) / sizeof(afl_environment_variables[0]) -
+      1;
+  for (uint32_t i = 0; i < s_afl_env; i++) {
+
+    if ((val = getenv(afl_environment_variables[i])) != NULL) {
+
+      fprintf(f, "%s=%s\n", afl_environment_variables[i], val);
+
+    }
+
+  }
+
+  fclose(f);
+
+}
+
 /* Update stats file for unattended monitoring. */
 
 void write_stats_file(afl_state_t *afl, double bitmap_cvg, double stability,
@@ -36,20 +85,12 @@ void write_stats_file(afl_state_t *afl, double bitmap_cvg, double stability,
 #endif
 
   unsigned long long int cur_time = get_cur_time();
-  u8                     fn[PATH_MAX];
-  s32                    fd;
-  FILE *                 f;
   u32                    t_bytes = count_non_255_bytes(afl, afl->virgin_bits);
+  u8                     fn[PATH_MAX];
+  FILE *                 f;
 
   snprintf(fn, PATH_MAX, "%s/fuzzer_stats", afl->out_dir);
-
-  fd = open(fn, O_WRONLY | O_CREAT | O_TRUNC, 0600);
-
-  if (fd < 0) { PFATAL("Unable to create '%s'", fn); }
-
-  f = fdopen(fd, "w");
-
-  if (!f) { PFATAL("fdopen() failed"); }
+  f = open_file(fn);
 
   /* Keep last values in case we're called from another context
      where exec/sec stats and such are not readily available. */
@@ -163,6 +204,7 @@ void write_stats_file(afl_state_t *afl, double bitmap_cvg, double stability,
               ? ""
               : "default",
           afl->orig_cmdline);
+
   /* ignore errors */
 
   if (afl->debug) {

src/afl-fuzz.c

@@ -1274,6 +1274,7 @@ int main(int argc, char **argv_orig, char **envp) {
 
   seek_to = find_start_position(afl);
 
+  write_fuzzer_config_file(afl);
   write_stats_file(afl, 0, 0, 0);
   maybe_update_plot_file(afl, 0, 0);
   save_auto(afl);