Implemented simple FILE struct and stdin/stdout/stderr

examples/hello.c

@@ -2,6 +2,6 @@
 
 int main() {
   char hellostr[] = "Hello, World!\n";
-  sys_write(1, hellostr, sizeof(hellostr));
+  sys_write(stdout, hellostr, sizeof(hellostr));
   return 0;
 }

examples/input.c

@@ -3,6 +3,6 @@
 int main() {
   char str[10];
   sys_read(2, str, 10);
-  sys_write(1, str, sizeof(str));
+  sys_write(stdout, str, sizeof(str));
   return 0;
 }

src/Makefile

@@ -6,13 +6,13 @@ LIBFILE=../builds/liblinux.a
 
 lib:
 	mkdir -p ../builds/liblinux
-	$(CC) -c liblinux.c $(CFLAGS) -o ../builds/liblinux.o
+	$(CC) -c liblinux.c $(CFLAGS) -o ../builds/liblinux.o -g
 	$(CC) -c liblinux/syscall.c $(CFLAGS) -o ../builds/liblinux/syscall.o
 	$(CC) -c liblinux/start.c $(CFLAGS) -o ../builds/liblinux/start.o
 	ar ruv $(LIBFILE) $(OBJFILES)
 	ranlib $(LIBFILE)
 
 examples:
-	$(CC) ../examples/hello.c $(CFLAGS) -Iinclude -L../builds -l:$(LIBFILE) -o ../builds/hello
+	$(CC) ../examples/hello.c $(CFLAGS) -Iinclude -L../builds -l:$(LIBFILE) -o ../builds/hello -g
 	$(CC) ../examples/input.c $(CFLAGS) -Iinclude -L../builds -l:$(LIBFILE) -o ../builds/input
 

src/include/liblinux.h

@@ -4,7 +4,19 @@
 #include <liblinux/syscall.h>
 #include <stddef.h>
 #include <sys/types.h>
-#include <bits/types/FILE.h>
+
+struct FILE {
+  int fd;
+};
+typedef struct FILE FILE;
+
+extern FILE *stdin;
+extern FILE *stdout;
+extern FILE *stderr;
+
+#define stdin stdin
+#define stdout stdout
+#define stderr stderr
 
 void sys_exit(int status); // FIXME: noreturn
 int sys_open(const char *pathname, int flags);

src/liblinux.c

@@ -1,6 +1,10 @@
 #include <liblinux.h>
 #include <liblinux/syscall.h>
 
+FILE *stdin = {0}; // FIXME
+FILE *stdout = {1};
+FILE *stderr = {2};
+
 void sys_exit(int status) {
   syscall(__NR_exit, status);
 }