restart rep

Practice/trash/prog1

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <error.h>
+
+
+int mtx(int *m, int s){
+    srand(time(NULL));
+    for(int i = 0; i < s; i++)
+        *m++ = rand()%0xffff;
+    return 0;
+}
+
+int main(int argc, char *argv[]){
+    int fd;
+    int n,s;
+    size_t ms;
+    int *m;
+    int *fa;
+    
+    if (argc < 3){
+        printf("Usage: a.out size filename\n");
+    }
+    s = n*n;
+    ms = s*sizeof(int);
+
+    if((fd = open(argv[2], O_RDWR | O_CREAT | O_TRUNC, 0664)) == -1){
+        perror("open: ");
+        exit(errno);
+
+    }
+}