#include <stdio.h>
/* Compile: cc -g -ansi -pedantic -Wall -O2 -o copy-strings copy-strings.c */
/* Run: ./copy-strings */
int
main(int argc, char *argv[])
{
  char *program_name;
  char *your_name;
  program_name = argv[0];
  if (argc != 2) 
    {
      printf("Usage: %s <your_name>\n", program_name);
      return 1;
    }
  printf("This program's name is %s.\n", program_name);
  your_name = argv[1];
  printf("Your name is '%s'.\n", your_name);
  return 0;
}

#include <stdio.h>
#include <string.h>
/* Compile: cc -g -Wall -o copy-strings copy-strings.c */
/* Run: ./copy-strings */
int
main(int argc, char *argv[])
{
  char program_name[100];
  char your_name[100];
  strcpy(program_name, argv[0]);
  if (argc != 2) 
    {
      printf("Usage: %s <your_name>\n", program_name);
      return 1;
  }
  printf("This program's name is %s.\n", program_name);
  strcpy(your_name, argv[1]);
  printf("Your name is '%s'.\n", your_name);
  return 0;
}

#include <stdio.h>
#include <string.h>
/* Compile: cc -g -ansi -pedantic -Wall -O2 -o copy-strncpy copy-strncpy.c */
/* Run: ./copy-strncpy */

#define MAX_LEN_PROGRAM_NAME 100
#define MAX_LEN_YOUR_NAME 10

int
main(int argc, char *argv[])
{
  char program_name[MAX_LEN_PROGRAM_NAME], your_name[MAX_LEN_YOUR_NAME];

  /* Command line validation. */
  if (argc != 2)
  {
      printf("Usage: %s <your_name>\n", argv[0]);
      if (argc == 1)
      {
          printf("Tip: Add your name as the 2nd argument. ;-)\n");
      }
      return 1;
  }
  if (strlen(argv[0]) > MAX_LEN_PROGRAM_NAME)
  {
      /* Error: program name is too long. */
      printf("Error: The program name must be %i characters or less.\n", MAX_LEN_PROGRAM_NAME);
      return 1;
  }
  if (strlen(argv[1]) > MAX_LEN_YOUR_NAME)
  {
      /* Error: your name is too long. */
      printf("Sorry, this program only accepts names shorter than %i characters.\n", MAX_LEN_YOUR_NAME);
      return 1;
  }
  /* Copy program name string. */
  (void)strncpy(program_name, argv[0], sizeof(program_name) - 1);
  /* NULL-terminate string. */
  program_name[sizeof(program_name) - 1] = '\0';
  /* Print program name. */
  printf("This program's name is %s.\n", program_name);
  /* Copy your name string. */
  (void)strncpy(your_name, argv[1], sizeof(your_name) - 1);
  /* NULL-terminate string. */
  your_name[sizeof(your_name) - 1] = '\0';
  /* Print your name. */
  printf("Your name is '%s'.\n", your_name);
  printf("Hello, %s!\n", your_name);
  return 0;
}

#include <stdio.h>
#include <string.h>
/* Compile: cc -g -ansi -pedantic -Wall -O2 -o copy-strlcpy copy-strlcpy.c */
/* Run: ./copy-strlcpy */

#define MAX_LEN_PROGRAM_NAME 100
#define MAX_LEN_YOUR_NAME 10

int
main(int argc, char *argv[])
{
  char program_name[MAX_LEN_PROGRAM_NAME], your_name[MAX_LEN_YOUR_NAME];
  if (strlcpy(program_name, argv[0], sizeof(program_name)) >= sizeof(program_name))
    {
      /* Error: destination string 'program_name' was truncated. */
      printf("Error: The program name must be %i characters or less.\n", MAX_LEN_PROGRAM_NAME);
      return 1;
  }
  if (argc != 2)
    {
      printf("Usage: %s <your_name>\n", program_name);
      return 1;
    }
  printf("This program's name is %s.\n", program_name);
  if (strlcpy(your_name, argv[1], sizeof(your_name)) >= sizeof(your_name))
    {
      /* Error: destination string 'your_name' was truncated. */
      printf("Sorry, this program only accepts names shorter than %i characters.\n", MAX_LEN_YOUR_NAME);
      return 1;
    }
  printf("Your name is '%s'.\n", your_name);
  return 0;
}