Partial exec, environment variables

kernel/proc/proc.h

@@ -22,6 +22,7 @@
 /* process states */
 #define PROC_READY     0
 #define PROC_SUSPENDED 1
+#define PROC_PARTIAL   2
 
 /* process flags */
 #define PROC_USTK_PREALLOC (1 << 0)
@@ -61,6 +62,8 @@ struct elf_aux proc_load_segments (struct proc* proc, uint8_t* elf);
 
 void proc_register (struct proc* proc, struct cpu* register_cpu, struct reschedule_ctx* rctx);
 
+void proc_register_partial (struct proc* proc);
+
 struct proc* proc_find_pid (int pid);
 
 struct proc* proc_from_file (struct proc* proc1, const char* volume, const char* path,