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/* dump-utmp.c
*
* print a utmp file in human-readable format. */
#include "config.h"
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include "common.h"
#include "utmp_rd.h"
#include "getopt.h"
char *program_name;
int debugging_enabled = 0; /* no -- we don't care about bad
records or the file-reading
algorithms. */
void main PARAMS((int argc, char *argv[]));
static
void
give_usage (void)
{
printf ("Usage: %s [-hrR] [-n <recs>] <files>\n\
[--num <recs>] [--raw] [--reverse] [--help]\n",
program_name);
print_wtmp_file_location ();
}
void
main (int argc, char *argv[])
{
int c;
int backwards_flag = 0; /* nonzero means read from the end */
long num_lines_to_print = -1; /* -1 means all */
int raw = 0;
program_name = argv[0];
while (1)
{
int option_index = 0;
static struct option long_options[] = {
{ "reverse", no_argument, NULL, 1 },
{ "help", no_argument, NULL, 2 },
{ "num", required_argument, NULL, 3 },
{ "raw", no_argument, NULL, 4 },
{ 0, 0, 0, 0 },
};
c = getopt_long (argc, argv, "rhn:R", long_options, &option_index);
if (c == EOF)
break;
switch (c)
{
case 'r':
case 1:
backwards_flag = 1;
break;
case 'h':
case 2:
give_usage ();
exit (1);
break;
case 'n':
case 3:
num_lines_to_print = atol (optarg);
if (num_lines_to_print < 1)
fatal ("number of lines to print must be positive and non-zero");
break;
case 'R':
case 4:
raw = 1;
break;
}
}
if (optind >= argc)
{
/* User didn't pass any filenames -- give them the usage
message. */
give_usage ();
exit (1);
}
/* Init the file reader */
utmp_init (backwards_flag);
/* Add all files that we want to dump. */
while (optind < argc)
add_utmp_file (argv[optind++]);
/* Dump the records. */
{
struct utmp *rec;
while ((rec = utmp_get_entry ()) != NULL)
{
if (raw)
fwrite (rec, sizeof (struct utmp), 1, stdout);
else
print_utmp_record (rec, stdout);
if (num_lines_to_print > -1)
{
num_lines_to_print--;
if (num_lines_to_print == 0) /* max lines printed */
exit (0);
}
}
}
exit (0);
}
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