A cat clone in naïve C.

cat.c

#include <stdlib.h>
#include <stdio.h>

char *buffer;

void read(char* fname) {
  FILE *fp = fopen(fname, "r");
  if (fp != NULL) {
    fseek(fp, 0L, SEEK_END);
    long s = ftell(fp);
    rewind(fp);
    buffer = malloc(s);
    fread(buffer, s, 1, fp);
    fwrite(buffer, s, 1, stdout);
    if (fp != NULL) fclose(fp);
    free(buffer);
  }
}

int main(int argc, char** argv) {

  int f;
  for(f=1; f<argc; f++) {
    read(argv[f]);
  }
  return 0;
}