Program to show the String length

#include "stdio.h"
#include "getopt.h"
#include "string.h"

#define PACKAGE "strl"
#define VERSION "1.0.0"

void print_help(int exval);

int main(int argc, char *argv[])
{
FILE *fp = stdin;
char line[1024];
int opt = 0;
int strip_newline = 0;

while((opt = getopt(argc, argv, "hvs")) != -1)
{
switch(opt)
{
case 'h':
print_help(0);
break;
case 'v':
fprintf(stdout, "%s %s\n", PACKAGE, VERSION);
exit(0);
break;
case 's':
strip_newline = 1;
break;
case '?':
fprintf(stderr, "%s: Error - No such option: `%c'\n\n", PACKAGE, optopt);
print_help(1);
break;
} /* switch */
} /* while */

if((argc - optind) == 0)
{
while((fgets(line, 1024, fp)) != NULL)
{
if(strip_newline == 1)
if(line[strlen(line) - 1] == '\n')
line[strlen(line) - 1] = '\0';

printf("%4d %s\n", strlen(line), line);
} /* while */
} else {
for(; optind < argc; optind++)
{
if(freopen(argv[optind], "r", fp) == NULL)
{
perror(argv[optind]);
continue;
}
while((fgets(line, 1024, fp)) != NULL)
{
if(strip_newline == 1)
if(line[strlen(line) - 1] == '\n')
line[strlen(line) - 1] = '\0';
printf("%4d %s\n", strlen(line), line);
}
}
}
return 0;
}
void print_help(int exval)
{
printf("%s,%s compute string length\n", PACKAGE, VERSION); printf("Usage: %s [-h] [-v] [-s] FILE1 FILE2 ...\n\n", PACKAGE); printf("Options:\n");
printf(" -h print this help and exit\n");
printf(" -v print version and exit\n");
printf(" -s strip trailing newlines\n\n");
printf(" If no filenames given, strings\n");
printf(" are read from stdin().\n\n");
printf(" This program does basicly the same as\n");
printf(" `${#varname}' in the GNU/Linux bash shell.\n\n"); exit(exval);
}

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