win32: allow ANSI emulation to be disabled

If the environment variable BB_SKIP_ANSI_EMULATION is set (the value
doesn't matter) escape sequences are passed through to the terminal.

1 files changed, 15 insertions, 2 deletions

diff --git a/win32/winansi.c b/win32/winansi.c
index 7069b8d80..e95b9c846 100644
--- a/win32/winansi.c
+++ b/win32/winansi.c
@@ -59,6 +59,19 @@ static void init(void)
         initialized = 1;
 }
 
+static int skip_ansi_emulation(void)
+{
+        static char *var = NULL;
+        static int got_var = FALSE;
+
+        if (!got_var) {
+                var = getenv("BB_SKIP_ANSI_EMULATION");
+                got_var = TRUE;
+        }
+
+        return var != NULL;
+}
+
 
 #define FOREGROUND_ALL (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE)
 #define BACKGROUND_ALL (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE)
@@ -399,7 +412,7 @@ static int ansi_emulate(const char *s, FILE *stream)
 
         while (*pos) {
                 pos = strstr(str, "\033[");
-                if (pos) {
+                if (pos && !skip_ansi_emulation()) {
                         size_t len = pos - str;
 
                         if (len) {
@@ -636,7 +649,7 @@ static int ansi_emulate_write(int fd, const void *buf, size_t count)
         /* we've checked the data doesn't contain any NULs */
         while (*pos) {
                 pos = strstr(str, "\033[");
-                if (pos) {
+                if (pos && !skip_ansi_emulation()) {
                         len = pos - str;
 
                         if (len) {