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/* mycopy2.c */
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
int main (int argc, char *argv[])
{
int c, i;
FILE *fp;
extern char *optarg;
extern int optind;
int option_index = 0;
char ch;
int help, iterations;
int errflg = 0;
static struct option long_options[] =
{
{"help", no_argument, NULL, 'h'},
{"iterations", required_argument, NULL, 'i'},
{NULL, 0, NULL, 0}
};
help = 0;
iterations = 1;
while ((ch = getopt_long (argc, argv, "hi:", long_options,
&option_index)) != EOF)
{
switch (ch)
{
case 'h':
help = 1;
break;
case 'i':
iterations = atoi (optarg);
if (iterations < 0)
{
fprintf (stderr, "error: iterations must be >= 0\n");
errflg ++;
}
break;
default:
errflg++;
}
} /* while */
if (errflg || help)
{
printf ("usage: %s [ -i ] <file>\n", argv[0]);
printf (" [ -h ] [ --help ] Print help screen \n");
printf (" [ -i ] [ --iterations ] Number of times to \
output <file>\n");
exit (1);
}
if (optind >= argc)
fp = stdin;
else
fp = fopen (argv[optind],"r");
for (i = 0; i < iterations; i++)
{
while ((c = fgetc (fp)) != EOF)
fputc (c, stdout);
rewind (fp);
}
fclose (fp);
return 0;
}
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