Created error.h and error.c for syserror()

src/kill.c

@@ -2,6 +2,8 @@
 #include <stdlib.h>
 #include <signal.h>
 
+#include "lib/error.h"
+
 int
 main(int argc, char *argv[])
 {
@@ -21,6 +23,10 @@ main(int argc, char *argv[])
       fprintf(stderr, "Specify who to kill\n");
       return 1;
     }
-  kill(pid,sig);
+  int fd = kill(pid,sig);
+  
+  if(fd == -1)
+    syserror("Could not kill process\n");
+  
   return 0;
 }

src/lib/error.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+#include "error.h"
+
+int syserror(char *msg)
+{
+  fprintf(stderr,"%s",msg);
+  return 1;
+}

src/lib/error.h

@@ -0,0 +1 @@
+int syserror(char *msg);