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// buthead: pass through all but first n lines of standard input
// Copyright (C) 2002, Barak A. Pearlmutter <bap@cs.unm.edu>
// This program 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 2 of the License, or
// (at your option) any later version.
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
int main(int argc, char **argv)
{
long lines_to_skip, i;
int c;
char *p;
if (argc != 2) {
fprintf(stderr, "Usage: %s count.\n", argv[0]);
exit(2);
}
lines_to_skip = strtol(argv[1], &p, 10);
if (errno || lines_to_skip < 0 || argv[1][0] == '\0' || *p != '\0') {
fprintf(stderr, "buthead error: invalid line count '%s'.\n", argv[1]);
exit(2);
}
for (i=0; i<lines_to_skip; ) {
if ((c = getc(stdin)) == EOF) {
fprintf(stderr, "buthead error: EOF on line %ld while skipping %ld.\n",
i+1, lines_to_skip);
exit(1);
}
if (c == '\n') i += 1;
}
while ((c = getchar()) != EOF)
putchar(c);
return 0;
}
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