pass file size from read_file

commands/edit.c

@@ -189,7 +189,7 @@ static int edit_read_file(const char *path)
 	struct stat s;
 
 	if (!stat(path, &s)) {
-		filebuffer = read_file(path);
+		filebuffer = read_file(path, NULL);
 		if (!filebuffer) {
 			printf("could not read %s: %s\n", path, errno_str());
 			return -1;

common/hush.c

@@ -1462,7 +1462,7 @@ static int source_script(const char *path, int argc, char *argv[])
 	ctx.global_argc = argc;
 	ctx.global_argv = argv;
 
-	script = read_file(path);
+	script = read_file(path, NULL);
 	if (!script)
 		return 1;
 

fs/fs.c

@@ -30,7 +30,7 @@
 #include <xfuncs.h>
 #include <init.h>
 
-void *read_file(const char *filename)
+void *read_file(const char *filename, size_t *size)
 {
 	int fd;
 	struct stat s;
@@ -49,6 +49,10 @@ void *read_file(const char *filename)
 		goto err_out1;
 
 	close(fd);
+
+	if (size)
+		*size = s.st_size;
+
 	return buf;
 
 err_out1:

include/fs.h

@@ -148,9 +148,10 @@ struct mtab_entry {
  * Read a file into memory. Memory is allocated with malloc and must
  * be freed with free() afterwards. This function allocates one
  * byte more than actually needed and sets this to zero, so that
- * it cn be used for text files.
+ * it can be used for text files.
+ * If size is nonzero it s set to the file size.
  */
-void *read_file(const char *filename);
+void *read_file(const char *filename, size_t *size);
 
 /*
  * This function turn 'path' into an absolute path and removes all occurrences