SystemCall/ptch.patch at master · nkrish19/SystemCall · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
diff -ruN original/linux-3.16.0/arch/x86/syscalls/syscall_32.tbl linux-3.16.0/arch/x86/syscalls/syscall_32.tbl
--- original/linux-3.16.0/arch/x86/syscalls/syscall_32.tbl	2019-09-27 19:23:23.480859669 +0530
+++ linux-3.16.0/arch/x86/syscalls/syscall_32.tbl	2019-09-28 11:02:39.640731956 +0530
@@ -361,3 +361,4 @@
 352	i386	sched_getattr		sys_sched_getattr
 353	i386	renameat2		sys_renameat2
 354	i386	seccomp			sys_seccomp
+355	i386	sh_task_info		sys_sh_task_info
diff -ruN original/linux-3.16.0/arch/x86/syscalls/syscall_64.tbl linux-3.16.0/arch/x86/syscalls/syscall_64.tbl
--- original/linux-3.16.0/arch/x86/syscalls/syscall_64.tbl	2019-09-27 19:23:23.480859669 +0530
+++ linux-3.16.0/arch/x86/syscalls/syscall_64.tbl	2019-09-28 11:03:07.616731893 +0530
@@ -362,3 +362,4 @@
 542	x32	getsockopt		compat_sys_getsockopt
 543	x32	io_setup		compat_sys_io_setup
 544	x32	io_submit		compat_sys_io_submit
+545	64	sh_task_info		sys_sh_task_info
diff -ruN original/linux-3.16.0/include/linux/syscalls.h linux-3.16.0/include/linux/syscalls.h
--- original/linux-3.16.0/include/linux/syscalls.h	2019-09-27 19:23:31.876859650 +0530
+++ linux-3.16.0/include/linux/syscalls.h	2019-09-28 11:04:43.588731675 +0530
@@ -868,4 +868,5 @@
 asmlinkage long sys_finit_module(int fd, const char __user *uargs, int flags);
 asmlinkage long sys_seccomp(unsigned int op, unsigned int flags,
 			    const char __user *uargs);
+asmlinkage long sys_sh_task_info(int pidt, char *filename);
 #endif
diff -ruN original/linux-3.16.0/Makefile linux-3.16.0/Makefile
--- original/linux-3.16.0/Makefile	2019-09-27 19:23:22.700859671 +0530
+++ linux-3.16.0/Makefile	2019-09-28 11:01:16.624732144 +0530
@@ -850,7 +850,7 @@


 ifeq ($(KBUILD_EXTMOD),)
-core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
+core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/ sh_task_info/

 vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
diff -ruN original/linux-3.16.0/sh_task_info/Makefile linux-3.16.0/sh_task_info/Makefile
--- original/linux-3.16.0/sh_task_info/Makefile	1970-01-01 05:30:00.000000000 +0530
+++ linux-3.16.0/sh_task_info/Makefile	2019-09-28 10:58:56.676732462 +0530
@@ -0,0 +1 @@
+obj-y := sh_task_info.o
diff -ruN original/linux-3.16.0/sh_task_info/sh_task_info.c linux-3.16.0/sh_task_info/sh_task_info.c
--- original/linux-3.16.0/sh_task_info/sh_task_info.c	1970-01-01 05:30:00.000000000 +0530
+++ linux-3.16.0/sh_task_info/sh_task_info.c	2019-09-28 10:58:56.676732462 +0530
@@ -0,0 +1,95 @@
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/syscalls.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <asm/uaccess.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+
+asmlinkage long sys_sh_task_info(int pidt, char *filename)
+{
+
+	struct task_struct *task;
+	int flag = 0;
+	struct file *file;
+	loff_t pos = 0;
+	int fd;
+
+	char buffer[2048];
+
+	mm_segment_t old_fs = get_fs();
+	set_fs(KERNEL_DS);
+
+	fd = sys_open(filename, O_WRONLY|O_CREAT, 0644);
+
+	for_each_process(task)
+	{
+		if (pidt==(task->pid))
+		{
+			flag = 1;
+			printk(KERN_WARNING "\nPROCESS: %s\n \
+					  PID_NUMBER: %ld\n \
+					  PROCESS STATE: %ld\n \
+					  PRIORITY: %ld\n \
+					  RT_PRIORITY: %ld\n \
+					  STATIC PRIORITY: %ld\n \
+					  NORMAL PRIORITY: %ld\n",
+					  task->comm, \
+					  (long)task_pid_nr(task), \
+					  (long)task->state, \
+					  (long)task->prio, \
+					  (long)task->rt_priority, \
+					  (long)task->static_prio, \
+					  (long)task->normal_prio);
+
+			char *otpt;
+
+			sprintf(buffer, "\nProcess: %s\n \
+				PID_NUMBER: %ld\n \
+				PROCESS STATE: %ld\n \
+				PRIORITY: %ld\n \
+				RT_PRIORITY: %ld\n \
+				STATIC PRIORITY: %ld\n \
+				NORMAL PRIORIY: %ld\n",
+				task->comm, (long)task_pid_nr(task), \
+				(long)task->state, (long)task->prio, \
+				(long)task->rt_priority, (long)task->static_prio, \
+				(long)task->normal_prio);
+
+			otpt = buffer;
+
+			// Check if given file exists
+			if (fd>=0)
+			{
+				sys_write(fd, buffer, strlen(buffer));
+				file = fget(fd);
+
+				if (file)
+				{
+					vfs_write(file, buffer, strlen(buffer), &pos);
+					fput(file);
+				}
+				sys_close(fd);
+			}
+			else
+			{
+				return -ENOENT;
+			}
+		}
+	}
+
+	set_fs(old_fs);
+
+	// Input task pid does not exist
+	if (flag==0)
+	{
+		return -ESRCH;
+	}
+
+	return 0;
+}