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/* This file is part of Idest.
Copyright (C) 2009-2011 Sergey Poznyakoff
Idest is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
Idest is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Idest. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#ifdef HAVE_GETOPT_H
# include <getopt.h>
#endif
static void
copyfile(FILE *file, const char *name)
{
int c;
FILE *in = fopen(name, "r");
if (!in) {
perror(name);
exit(1);
}
while ((c = fgetc(in)) != EOF)
fputc(c, file);
fclose(in);
}
int
main(int argc, char **argv)
{
char *suf;
unsigned int length, i, c;
char *filename = NULL, *suffix = NULL, *prefix = NULL;
FILE *fp;
while ((c = getopt(argc, argv, "hf:p:s:")) != EOF) {
switch (c) {
case 'f':
filename = optarg;
break;
case 'p':
prefix = optarg;
break;
case 's':
suffix = optarg;
break;
case 'h':
fprintf(stdout,
"usage: %s [-f FILE] [-p PREFIX]"
" [-s SUFFIX] SIZE\n", argv[0]);
exit(0);
default:
exit(1);
}
}
if (optind + 1 != argc) {
fprintf(stderr, "%s: invalid usage\n", argv[0]);
exit(1);
}
length = strtoul(argv[optind], &suf, 10);
if (suf[0] && suf[1]) {
fprintf(stderr, "%s: unknown size suffix: %s\n", argv[0], suf);
exit(1);
}
switch (*suf) {
case 0:
break;
case 'g':
case 'G':
length *= 1024;
case 'm':
case 'M':
length *= 1024;
case 'k':
case 'K':
length *= 1024;
break;
default:
fprintf(stderr, "%s: unknown size suffix: %s\n", argv[0], suf);
exit(1);
}
if (filename) {
fp = fopen(filename, "w");
if (!fp) {
perror(filename);
exit(1);
}
} else
fp = stdout;
if (prefix)
copyfile(fp, prefix);
for (i = 0; i < length; i++)
fputc (i & 255, fp);
if (suffix)
copyfile(fp, suffix);
if (ferror(fp)) {
fprintf(stderr, "%s: write error", argv[0]);
exit(1);
}
fclose(fp);
exit(0);
}
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