merge kevin's patches to remove color escape sequences from the logs (bug #3929)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@5394 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CHANGES

@@ -24,6 +24,7 @@
        in some media players
     -- Fixed if the last line of text in a file for the call spool did not contain
        a new line, it would not be processed
+    -- Fixed the logger so that color escape sequences wouldn't be sent to the logs
 
 Asterisk 1.0.7
 

logger.c

@@ -478,9 +478,39 @@ void close_logger(void)
 	return;
 }
 
+static void strip_coloring(char *str)
+{
+	char *src, *dest, *end;
+	
+	if (!str)
+		return;
+
+	/* find the first potential escape sequence in the string */
+
+	src = strchr(str, '\033');
+	if (!src)
+		return;
+
+	dest = src;
+	while (*src) {
+		/* at the top of this loop, *src will always be an ESC character */
+		if ((src[1] == '[') && ((end = strchr(src + 2, 'm'))))
+			src = end + 1;
+		else
+			*dest++ = *src++;
+
+		/* copy characters, checking for ESC as we go */
+		while (*src && (*src != '\033'))
+			*dest++ = *src++;
+	}
+
+	*dest = '\0';
+}
+
 static void ast_log_vsyslog(int level, const char *file, int line, const char *function, const char *fmt, va_list args) 
 {
 	char buf[BUFSIZ];
+	char *s;
 
 	if (level >= SYSLOG_NLEVELS) {
 		/* we are locked here, so cannot ast_log() */
@@ -494,7 +524,9 @@ static void ast_log_vsyslog(int level, const char *file, int line, const char *f
 		snprintf(buf, sizeof(buf), "%s[%ld]: %s:%d in %s: ",
 			 levels[level], (long)GETTID(), file, line, function);
 	}
-	vsnprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), fmt, args);
+	s = buf + strlen(buf);
+	vsnprintf(s, sizeof(buf) - strlen(buf), fmt, args);
+	strip_coloring(s);
 	syslog(syslog_level_map[level], "%s", buf);
 }
 
@@ -567,6 +599,7 @@ void ast_log(int level, const char *file, int line, const char *function, const
 				fprintf(chan->fileptr, buf);
 				va_start(ap, fmt);
 				vsnprintf(buf, sizeof(buf), fmt, ap);
+				strip_coloring(buf);	
 				va_end(ap);
 				fputs(buf, chan->fileptr);
 				fflush(chan->fileptr);