0001-adding-ps-command.patch

From 63db41cb2520f2566c0f48cc67a095883c26dea6 Mon Sep 17 00:00:00 2001
From: Pawan <pawanprakash101@gmail.com>
Date: Thu, 17 Jul 2014 23:57:08 +0530
Subject: [PATCH] adding ps command

---
 Makefile  |    1 +
 ps.c      |    8 ++++++++
 syscall.c |    2 ++
 syscall.h |    1 +
 sysfile.c |    6 ++++++
 user.h    |    1 +
 usys.S    |    1 +
 7 files changed, 20 insertions(+)
 create mode 100644 ps.c

diff --git a/Makefile b/Makefile
index a1b3d38..2643bbf 100644
--- a/Makefile
+++ b/Makefile
@@ -170,6 +170,7 @@ UPROGS=\
 	_usertests\
 	_wc\
 	_zombie\
+	_ps\
 
 fs.img: mkfs README $(UPROGS)
 	./mkfs fs.img README $(UPROGS)
diff --git a/ps.c b/ps.c
new file mode 100644
index 0000000..192d4df
--- /dev/null
+++ b/ps.c
@@ -0,0 +1,8 @@
+#include "types.h"
+#include "user.h"
+
+int main()
+{
+	ps();
+	exit();
+}
diff --git a/syscall.c b/syscall.c
index 799ebc2..f65fb7e 100644
--- a/syscall.c
+++ b/syscall.c
@@ -98,6 +98,7 @@ extern int sys_unlink(void);
 extern int sys_wait(void);
 extern int sys_write(void);
 extern int sys_uptime(void);
+extern int sys_ps(void);
 
 static int (*syscalls[])(void) = {
 [SYS_fork]    sys_fork,
@@ -121,6 +122,7 @@ static int (*syscalls[])(void) = {
 [SYS_link]    sys_link,
 [SYS_mkdir]   sys_mkdir,
 [SYS_close]   sys_close,
+[SYS_ps]      sys_ps,
 };
 
 void
diff --git a/syscall.h b/syscall.h
index bc5f356..dfe8c32 100644
--- a/syscall.h
+++ b/syscall.h
@@ -20,3 +20,4 @@
 #define SYS_link   19
 #define SYS_mkdir  20
 #define SYS_close  21
+#define SYS_ps     22
diff --git a/sysfile.c b/sysfile.c
index 64f2b33..efbfc77 100644
--- a/sysfile.c
+++ b/sysfile.c
@@ -100,6 +100,12 @@ sys_close(void)
   return 0;
 }
 
+int sys_ps(void)
+{
+  procdump();
+  return 0;
+}
+
 int
 sys_fstat(void)
 {
diff --git a/user.h b/user.h
index 9e26cf1..5a75103 100644
--- a/user.h
+++ b/user.h
@@ -22,6 +22,7 @@ int getpid(void);
 char* sbrk(int);
 int sleep(int);
 int uptime(void);
+int ps(void);
 
 // ulib.c
 int stat(char*, struct stat*);
diff --git a/usys.S b/usys.S
index 8bfd8a1..f60a533 100644
--- a/usys.S
+++ b/usys.S
@@ -29,3 +29,4 @@ SYSCALL(getpid)
 SYSCALL(sbrk)
 SYSCALL(sleep)
 SYSCALL(uptime)
+SYSCALL(ps)
-- 
1.7.9.5