scripts: imx-image: allow semicolon as command delimiter

When we want to pass the imxcfg files through cpp we also want to
allow defines which define multiple commands. For this to work we
have to use an additional command delimiter as we can't pass '\n'
though cpp. Use ';' for this.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts/imx/imx-image.c

@@ -492,12 +492,40 @@ struct command cmds[] = {
 	},
 };
 
+static char *readcmd(FILE *f)
+{
+	static char *buf;
+	char *str;
+	ssize_t ret;
+
+	if (!buf) {
+		buf = malloc(4096);
+		if (!buf)
+			return NULL;
+	}
+
+	str = buf;
+	*str = 0;
+
+	while (1) {
+		ret = fread(str, 1, 1, f);
+		if (!ret)
+			return strlen(buf) ? buf : NULL;
+
+		if (*str == '\n' || *str == ';') {
+			*str = 0;
+			return buf;
+		}
+
+		str++;
+	}
+}
+
 static int parse_config(const char *filename)
 {
 	FILE *f;
 	int lineno = 0;
 	char *line = NULL, *tmp;
-	size_t len;
 	char *argv[MAXARGS];
 	int nargs, i, ret;
 
@@ -507,13 +535,14 @@ static int parse_config(const char *filename)
 		exit(1);
 	}
 
-	while ((getline(&line, &len, f)) > 0) {
+	while (1) {
+		line = readcmd(f);
+		if (!line)
+			break;
+
 		lineno++;
 
 		tmp = strchr(line, '#');
-		if (tmp)
-			*tmp = 0;
-		tmp = strrchr(line, '\n');
 		if (tmp)
 			*tmp = 0;