kernel: filedesc: Allocate standard streams

Signed-off-by: Ian Moffett <ian@osmora.org>

3 files changed, 30 insertions, 0 deletions

diff --git a/src/sys/include/os/filedesc.h b/src/sys/include/os/filedesc.h
index 9d6f229..87bf242 100644
--- a/src/sys/include/os/filedesc.h
+++ b/src/sys/include/os/filedesc.h
@@ -31,6 +31,33 @@
 #define _OS_FILEDESC_H_ 1
 
 #include <sys/types.h>
+#include <os/vnode.h>
+
+struct proc;
+
+/*
+ * Represents a file descriptor
+ *
+ * @fdno: File descriptor index
+ * @vp: Vnode this fd is linked with
+ * @mode: File attributes
+ */
+struct filedesc {
+    int fdno;
+    struct vnode *vp;
+    mode_t mode;
+};
+
+/*
+ * Initialize a process file descriptor table
+ * and set up standard streams
+ *
+ * @procp: Process of fd table to init
+ *
+ * Returns zero on success, less than zero values
+ * indicate failure.
+ */
+int fdtab_init(struct proc *procp);
 
 /*
  * Write to a file descriptor
diff --git a/src/sys/include/sys/limits.h b/src/sys/include/sys/limits.h
index d2cefb6..5e32233 100644
--- a/src/sys/include/sys/limits.h
+++ b/src/sys/include/sys/limits.h
@@ -36,5 +36,6 @@
 #define CPU_MAX 256
 #define SC_MAX 64       /* Max syscalls */
 #define SCWIN_MAX 2    /* Max syscall windows */
+#define FD_MAX 256      /* Max file descriptors */
 
 #endif  /* !_SYS_LIMITS_H_ */
diff --git a/src/sys/include/sys/proc.h b/src/sys/include/sys/proc.h
index 43772be..c31cc4c 100644
--- a/src/sys/include/sys/proc.h
+++ b/src/sys/include/sys/proc.h
@@ -36,6 +36,7 @@
 #include <sys/param.h>
 #include <sys/queue.h>
 #include <os/mac.h>
+#include <os/filedesc.h>
 #include <vm/vm.h>
 #include <machine/pcb.h>    /* standard */
 
@@ -63,6 +64,7 @@ struct proc {
     uint32_t flags;
     struct md_pcb pcb;
     struct syscall_domain scdom;
+    struct filedesc *fdtab[FD_MAX];
     mac_level_t level;
     TAILQ_HEAD(, vm_range) maplist;
     TAILQ_ENTRY(proc) link;