syscall_example2.c created online with Bitbucket

Author: atulkumarpccs

KernelDrivers_March2011/syscall_example2.c

@@ -0,0 +1,33 @@
+#define _GNU_SOURCE
+#include<unistd.h>
+#include<stdio.h>
+#include<stdlib.h>
+#include<sys/syscall.h>
+#include<sys/types.h>
+
+
+int main()
+{
+
+   int ret,ret1;
+
+   char str[1024];
+
+   ret = snprintf(str,sizeof(str), "the pid of the process is %d\n", getpid());
+  
+   ret1 = syscall(SYS_write,STDOUT_FILENO,str,ret+1);
+
+   if(ret1<0){ perror("error in write syscall"); exit(1);}
+
+   ret1 = syscall(SYS_getpid);
+   
+
+   if(ret1<0){ perror("error in open syscall"); exit(2);}
+
+   exit(0); 
+
+}
+
+              
+
+