/*------------------------------------------------------------------*/
/* cat2.c                                                           */
/* Author: Bob Dondero                                              */
/* The fgets() and fputs() functions                                */
/*------------------------------------------------------------------*/

#include <stdio.h>

enum {MAX_LINE_LENGTH = 256};

/*------------------------------------------------------------------*/

static void copyFrom(FILE *psFile)

/* Read all lines from *psFile, and write them to stdout. */

{
   char acBuffer[MAX_LINE_LENGTH];

   while (fgets(acBuffer, MAX_LINE_LENGTH, psFile) != NULL)
      fputs(acBuffer, stdout);
}

/*------------------------------------------------------------------*/

int main(int argc, char *argv[])

/* If argc == 1, then read all lines from stdin, and write them to
   stdout.  Otherwise read all lines from the files named
   argv[1]...argv[argc-1], and write them to stdout.  Return 0. */

{
   int i;

   if (argc == 1)
      copyFrom(stdin);
   else
      for (i = 1; i < argc; i++)
      {
         FILE *psFile;
         psFile = fopen(argv[i], "r");
         if (psFile == NULL)
            fprintf(stderr, "%s: %s: No such file or directory\n",
               argv[0], argv[i]);
         else
         {
            copyFrom(psFile);
            fclose(psFile);
         }
      }

   return 0;
}