File module: end by NULL character

osdd-file.c

@@ -22,6 +22,7 @@ struct file_state
 	char * file_name;
 	char * open_mode;
 	struct osd_to_string_state to_string;
+	bool end_by_null_char;
 };
 
 // *************************  MAIN FUNCTIONS *******
@@ -34,6 +35,8 @@ void file_write(struct file_state *state, VECTOR(char) out)
 	if(f)
 	{
 		fprintf(f,"%s", out);
+		if(state->end_by_null_char)
+			putc(0, f);
 		fclose(f);
 	}
 	VFREE(out);
@@ -49,6 +52,7 @@ void file_new_help(FILE * f)
 	fprintf(f,"\
 Module FILE help:\n\
 -a, --append \t\tAppend to file (do not overwrite)\n\
+-n, --end-by-null-char\tAppend \\0 to end of each message\n\
 " OSDD_TO_STRING_HELP "\
 \n\
 ");
@@ -60,9 +64,10 @@ struct osd_abstract file_new(int argc, char ** argv, Display * nope)
 	(void)nope;
 	argc++;argv--;
 	struct osd_abstract r;
-	static const char short_opts[] = "+b" OSDD_TO_STRING_SHORTOP;
+	static const char short_opts[] = "+b+n" OSDD_TO_STRING_SHORTOP;
 	static const struct option long_opts[] = {
 		{ "append",		no_argument,	NULL,	'b' },
+		{ "end-by-null-char",		no_argument,	NULL,	'n' },
 		OSDD_TO_STRING_LONGOP
 		{ NULL,		0,			NULL,	0   },
 	};
@@ -83,6 +88,9 @@ struct osd_abstract file_new(int argc, char ** argv, Display * nope)
 			case 'b':
 				state->open_mode = "a";
 				break;
+			case 'n':
+				state->end_by_null_char = true;
+				break;
 			default:
 				fprintf(stderr,"Option %c not exist\n\n",opt);
 				file_new_help(stderr);