main2.c

// #
// This version was created by Gemini assistent based on my original version.

/*
 Switches:
 --help
 --version
 --number
 --show-tabs
 --show-ends
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

#define BUFFER_SIZE (4 * 1024)

const char *VersionString = "Version 1.0";
const char *HelpString = "options: --help, --version, --number";

// Function prototypes (if using separate functions for help/version)

int main(int argc, char *argv[]) {
  FILE *fp;
  char *buffer = malloc(BUFFER_SIZE);  // Allocate buffer dynamically

  int fd, nreads, nwrites;
  size_t bytes_read = 0;
  int i;

  // Flag handling (using a loop for simplicity)
  int fNumber = 0, fShowTabs = 0, fShowEnds = 0;
  for (i = 1; i < argc; i++) {
    if (strcmp(argv[i], "--help") == 0) {
      // Call help function (if implemented)
      return EXIT_SUCCESS;
    } else if (strcmp(argv[i], "--version") == 0) {
      // Call version function (if implemented)
      return EXIT_SUCCESS;
    } else if (strcmp(argv[i], "--number") == 0) {
      fNumber = 1;
    } else if (strcmp(argv[i], "--show-tabs") == 0) {
      fShowTabs = 1;
    } else if (strcmp(argv[i], "--show-ends") == 0) {
      fShowEnds = 1;
    } else {
      // Open the file
      fd = open(argv[i], O_RDONLY);
      if (fd < 0) {
        perror("open");
        goto fail;
      }

      // Read and write in a loop
      while ((nreads = read(fd, buffer, BUFFER_SIZE)) > 0) {
        nwrites = write(1, buffer, nreads);
        if (nwrites != nreads) {
          perror("write");
          goto fail;
        }
        bytes_read += nreads;
      }

      if (nreads < 0) {
        perror("read");
        goto fail;
      }

      close(fd);  // Close the file
    }
  }

  free(buffer);  // Free the allocated buffer
  return EXIT_SUCCESS;

fail:
  free(buffer);  // Free even on error
  return EXIT_FAILURE;
}