syscall_fork.c created online with Bitbucket

Author: atulkumarpccs

KernelDrivers_March2011/syscall_fork.c

@@ -0,0 +1,47 @@
+extern char **environ;
+
+#define __NR_test_syscall1 327
+
+_syscall3(ssize_t,write,int,fd,const void *,buf,size_t,count)
+
+_syscall3(long,open,const char *,filename,int,flags,int,mode)
+
+_syscall0(pid_t,getpid)
+_syscall0(pid_t,fork)
+
+_syscall2(long,test_syscall1,unsigned int*,pid,unsigned int *,tgid)
+//_syscall1(long,test_syscall2,struct syscall *, syscall2)
+int main()
+{
+    
+
+   int ret,ret1;
+   unsigned int pid,tgid;
+
+   char str[1024];
+
+
+
+/*   ret = snprintf(str,sizeof(str), "the pid of the process is %d\n", getpid());
+  
+   ret1 = write(STDOUT_FILENO,str,ret+1);
+
+   if(ret1<0){ perror("error in write syscall"); exit(1);}
+
+   ret1 = getpid();
+   
+
+   if(ret1<0){ perror("error in open syscall"); exit(2);}*/
+
+
+   ret1 = test_syscall1(&pid,&tgid);
+   if(ret1<0) { perror("error in test_syscall"); exit(1); }
+
+   printf("test_syscall returned pid %d and tgid %d\n",pid,tgid);
+
+
+   exit(0); 
+}
+              
+
+