From 1543f9762122ab7c363c64a841892e5d11e85168 Mon Sep 17 00:00:00 2001
From: hinus <hinus@163.com>
Date: Wed, 11 Aug 2021 16:55:35 +0800
Subject: [PATCH] Title: System call 'uname' Issue:
 https://gitee.com/hinus/linux_kernel_011/issues/I448XZ Description: System
 call 'uname'

---
 include/linux/sys.h   |  4 ++--
 include/sys/param.h   |  5 +++++
 include/sys/utsname.h | 18 ++++++++++++++++++
 include/unistd.h      |  1 +
 kernel/sys.c          | 15 +++++++++++++++
 5 files changed, 41 insertions(+), 2 deletions(-)
 create mode 100644 include/sys/utsname.h

diff --git a/include/linux/sys.h b/include/linux/sys.h
index 8ae4fc4..e37c652 100644
--- a/include/linux/sys.h
+++ b/include/linux/sys.h
@@ -57,7 +57,7 @@ extern int sys_ioctl();
 extern int sys_mpx();
 //extern int sys_setpgid();
 extern int sys_ulimit();
-//extern int sys_uname();
+extern int sys_uname();
 //extern int sys_umask();
 extern int sys_chroot();
 //extern int sys_ustat();
@@ -155,7 +155,7 @@ fn_ptr sys_call_table[] = {
     0, //    sys_setpgid,
     sys_ulimit,
 
-    0, //    sys_uname,
+    sys_uname,
     0, //    sys_umask,
     sys_chroot,
     0, //    sys_ustat,
diff --git a/include/sys/param.h b/include/sys/param.h
index 2f23377..f1d2bdf 100644
--- a/include/sys/param.h
+++ b/include/sys/param.h
@@ -1,7 +1,12 @@
 #ifndef _PARAM_H
 #define _PARAM_H
 
+#define HZ 100
+#define EXEC_PAGESIZE 4096
+
 #define NGROUPS     32
 #define NOGROUP     -1
 
+#define MAXHOSTNAMELEN 8
+
 #endif
diff --git a/include/sys/utsname.h b/include/sys/utsname.h
new file mode 100644
index 0000000..c25600a
--- /dev/null
+++ b/include/sys/utsname.h
@@ -0,0 +1,18 @@
+#ifndef _SYS_UTSNAME_H
+#define _SYS_UTSNAME_H
+
+#include <sys/types.h>
+#include <sys/param.h>
+
+struct utsname {
+    char sysname[9];
+    char nodename[MAXHOSTNAMELEN+1];
+    char release[9];
+    char version[9];
+    char machine[9];
+};
+
+extern int uname(struct utsname * utsbuf);
+
+#endif
+
diff --git a/include/unistd.h b/include/unistd.h
index 6d3027d..f180a18 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -8,6 +8,7 @@
 #endif
 
 #include <sys/time.h>
+#include <sys/utsname.h>
 
 #ifdef __LIBRARY__
 
diff --git a/kernel/sys.c b/kernel/sys.c
index 43297e2..e114595 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -3,6 +3,7 @@
 #include <linux/tty.h>
 #include <linux/kernel.h>
 #include <linux/config.h>
+#include <sys/utsname.h>
 #include <sys/param.h>
 #include <asm/segment.h>
 #include <string.h>
@@ -87,3 +88,17 @@ int in_group_p(gid_t grp) {
     return 0;
 }
 
+static struct utsname thisname = {
+    UTS_SYSNAME, UTS_NODENAME, UTS_RELEASE, UTS_VERSION, UTS_MACHINE
+};
+
+int sys_uname(struct utsname * name) {
+    int i;
+
+    if (!name) return -ERROR;
+    verify_area(name, sizeof(*name));
+    for(i = 0; i < sizeof(*name); i++)
+        put_fs_byte(((char *) &thisname)[i],i+(char *) name);
+    return 0;
+}
+
-- 
Gitee