X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=src%2Flib%2Fuser%2Fsyscall.h;h=188576d35edbe205507fa2d61e6dc4644014be87;hb=8a0c402207a9c4b0dc58f417ae3bc169c6f62f0f;hp=a594016cb1ff1db565f5739a97169f873d00167a;hpb=fa3c96150e704a346f1a92cb52cd811514b24755;p=pintos-anon

diff --git a/src/lib/user/syscall.h b/src/lib/user/syscall.h
index a594016..188576d 100644
--- a/src/lib/user/syscall.h
+++ b/src/lib/user/syscall.h
@@ -5,17 +5,20 @@
 #include <debug.h>
 
 typedef int pid_t;
+#define PID_ERROR ((pid_t) -1)
 
 void halt (void) NO_RETURN;
 void exit (int status) NO_RETURN;
 pid_t exec (const char *file);
 int join (pid_t);
-bool create (const char *file);
+bool create (const char *file, unsigned initial_size);
 bool remove (const char *file);
 int open (const char *file);
 int filesize (int fd);
 int read (int fd, void *buffer, unsigned length);
 int write (int fd, const void *buffer, unsigned length);
+void seek (int fd, unsigned position);
+unsigned tell (int fd);
 void close (int fd);
 bool mmap (int fd, void *addr, unsigned length);
 bool munmap (void *addr, unsigned length);