5 files changed, 23 insertions, 3 deletions
diff --git a/kernel/include/comus/fs.h b/kernel/include/comus/fs.h
index 2f678b6..044330b 100644
--- a/kernel/include/comus/fs.h
+++ b/kernel/include/comus/fs.h
@@ -148,6 +148,15 @@ struct file {
 	void (*close)(struct file *file);
 };
 
+/// open flags
+enum {
+	O_CREATE = 0x01,
+	O_RDONLY = 0x02,
+	O_WRONLY = 0x04,
+	O_APPEND = 0x08,
+	O_RDWR = 0x10,
+};
+
 /// file system vtable, used for opening
 /// and stating files. filesystem mount functions must
 /// set fs_name, fs_disk, open, and stat.
@@ -200,7 +209,7 @@ struct file_system {
 	/// filesystem name
 	const char *fs_name;
 	/// opens a file
-	int (*open)(struct file_system *fs, const char *fullpath,
+	int (*open)(struct file_system *fs, const char *fullpath, int flags,
 				struct file **out);
 	/// stats a file
 	int (*stat)(struct file_system *fs, const char *fullpath,
diff --git a/kernel/include/comus/limits.h b/kernel/include/comus/limits.h
index 4cb348d..1ef13b4 100644
--- a/kernel/include/comus/limits.h
+++ b/kernel/include/comus/limits.h
@@ -12,6 +12,10 @@
 /// max number of processes
 #define N_PROCS 256
 
+/// process limits
+#define N_OPEN_FILES 64
+#define N_ARGS 64
+
 /// max nubmer of pci devices
 #define N_PCI_DEV 256
 
diff --git a/kernel/include/comus/procs.h b/kernel/include/comus/procs.h
index 7b1a70a..3df31c3 100644
--- a/kernel/include/comus/procs.h
+++ b/kernel/include/comus/procs.h
@@ -13,6 +13,7 @@
 #include <comus/limits.h>
 #include <comus/memory.h>
 #include <comus/syscalls.h>
+#include <comus/fs.h>
 #include <lib.h>
 #include <elf.h>
 
@@ -59,6 +60,9 @@ struct pcb {
 	char *heap_start;
 	size_t heap_len;
 
+	// open files
+	struct file *open_files[N_OPEN_FILES];
+
 	// elf metadata
 	Elf64_Ehdr elf_header;
 	Elf64_Phdr elf_segments[N_ELF_SEGMENTS];
diff --git a/kernel/include/comus/syscalls.h b/kernel/include/comus/syscalls.h
index f714184..8b671c2 100644
--- a/kernel/include/comus/syscalls.h
+++ b/kernel/include/comus/syscalls.h
@@ -30,9 +30,10 @@
 #define SYS_poweroff 17
 #define SYS_drm 18
 #define SYS_ticks 19
+#define SYS_seek 20
 
 // UPDATE THIS DEFINITION IF MORE SYSCALLS ARE ADDED!
-#define N_SYSCALLS 20
+#define N_SYSCALLS 21
 
 // interrupt vector entry for system calls
 #define VEC_SYSCALL 0x80
diff --git a/kernel/include/comus/user.h b/kernel/include/comus/user.h
index a1a718b..1b35ac4 100644
--- a/kernel/include/comus/user.h
+++ b/kernel/include/comus/user.h
@@ -9,13 +9,15 @@
 #ifndef USER_H_
 #define USER_H_
 
+#include "comus/memory.h"
 #include <comus/procs.h>
 #include <comus/fs.h>
 
 /**
  * Load a user elf program from a file into a pcb
  */
-int user_load(struct pcb *pcb, struct file *file);
+int user_load(struct pcb *pcb, struct file *file, const char **args,
+			  mem_ctx_t args_ctx);
 
 /**
  * Clone a user process. Used for fork().