cat that print name before lines, just bullshit

#include <stdio.h>
#include <errno.h>

int
main (int argc, char **argv)
{
 FILE *fp;
 char *line, buf[99];

 if (argc < 2)
  return -1;
 
 argv++; 
 for (; argc > 1; argc--, argv++)
 {
  if (! (fp = fopen (*argv, "r")))
   error (1,errno);

  while ((line = fgets(buf, 99, fp)) != NULL)
   printf ("%s: %s",  *argv, line);
 }
 return 0;
}