3 files changed, 53 insertions, 1 deletions
diff --git a/sys/include/sys/proc.h b/sys/include/sys/proc.h
index c561e91..1b59de9 100644
--- a/sys/include/sys/proc.h
+++ b/sys/include/sys/proc.h
@@ -63,20 +63,33 @@ struct proc {
     struct spinlock vcache_lock;
     struct trapframe tf;
     struct pcb pcb;
+    struct proc *parent;
+    void *spawn_data;
     size_t priority;
+    int exit_status;
     bool rested;
     uint32_t flags;
+    uint32_t nleaves;
     uintptr_t stack_base;
     struct spinlock ksigq_lock;
+    TAILQ_HEAD(, proc) leafq;
+    TAILQ_ENTRY(proc) leaf_link;
     TAILQ_HEAD(, ksiginfo) ksigq;
     TAILQ_ENTRY(proc) link;
 };
 
 #define PROC_EXITING    BIT(0)  /* Exiting */
 #define PROC_EXEC       BIT(1)  /* Exec called (cleared by sched) */
+#define PROC_ZOMB       BIT(2)  /* Zombie (dead but not deallocated) */
+#define PROC_LEAFQ      BIT(3)  /* Leaf queue is active */
+#define PROC_WAITED     BIT(4)  /* Being waited on by parent */
 
 struct proc *this_td(void);
-int md_fork(struct proc *p, struct proc *parent, uintptr_t ip);
+struct proc *get_child(struct proc *cur, pid_t pid);
+int md_spawn(struct proc *p, struct proc *parent, uintptr_t ip);
+
+scret_t sys_spawn(struct syscall_args *scargs);
+pid_t spawn(struct proc *cur, void(*func)(void), void *p, int flags, struct proc **newprocp);
 
 void md_td_stackinit(struct proc *td, void *stack_top, struct exec_prog *prog);
 __dead void md_td_kick(struct proc *td);
diff --git a/sys/include/sys/spawn.h b/sys/include/sys/spawn.h
new file mode 100644
index 0000000..3828d5c
--- /dev/null
+++ b/sys/include/sys/spawn.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SYS_SPAWN_H_
+#define _SYS_SPAWN_H_
+
+#include <sys/types.h>
+
+#if !defined(_KERNEL)
+pid_t spawn(const char *pathname, int flags);
+#endif  /* _KERNEL */
+#endif  /* !_SYS_SPAWN_H_ */
diff --git a/sys/include/sys/syscall.h b/sys/include/sys/syscall.h
index 2b98df7..16c4b17 100644
--- a/sys/include/sys/syscall.h
+++ b/sys/include/sys/syscall.h
@@ -46,6 +46,7 @@
 #define SYS_stat    5
 #define SYS_sysctl  6
 #define SYS_write   7
+#define SYS_spawn   8
 
 #if defined(_KERNEL)
 /* Syscall return value and arg type */