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/* Show where a file exists
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.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, or (at
your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <hurd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <argp.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <error.h>
#include <hurd/fs.h>
#include <hurd/store.h>
static struct argp_option options[] =
{
{"kind", 'k', 0, 0, "Print the type of store behind FILE"},
{"name", 'n', 0, 0, "Print the name of the store behind FILE"},
{"blocks", 'b', 0, 0, "Print the number of blocks in FILE"},
{"block-size", 'B', 0, 0, "Print the block size of FILE's store"},
{"size", 's', 0, 0, "Print the size, in bytes, of FILE"},
{"runs", 'r', 0, 0, "Print the runs of blocks in FILE"},
{"children", 'c', 0, 0, "If the store has children, show them too"},
{"dereference", 'L', 0, 0, "If FILE is a symbolic link, follow it"},
{"prefix", 'p', 0, 0, "Always print `FILE: ' before info"},
{"no-prefix", 'P', 0, 0, "Never print `FILE: ' before info"},
{0, 0}
};
static char *args_doc = "FILE...";
static char *doc = "With no FILE arguments, the file attached to standard \
input is used. The fields to be printed are separated by colons, in this \
order: PREFIX: KIND: NAME: BLOCK-SIZE: BLOCKS: SIZE: RUNS. If the store is a \
composite one and --children is specified, children are printed on lines \
following the main store, indented accordingly. By default, all \
fields, and children, are printed.";
/* ---------------------------------------------------------------- */
/* Things we can print about a file's storage. */
#define W_SOURCE 0x01
#define W_KIND 0x02
#define W_NAME 0x04
#define W_BLOCKS 0x08
#define W_BLOCK_SIZE 0x10
#define W_SIZE 0x20
#define W_RUNS 0x40
#define W_CHILDREN 0x80
#define W_ALL 0xFF
/* Print a line of information (exactly what is determinted by WHAT)
about store to stdout. LEVEL is the desired indentation level. */
static void
print_store (struct store *store, int level, unsigned what)
{
int i;
int first = 1;
char *kind_name;
char unknown_kind_name[20];
void psep ()
{
if (first)
first = 0;
else
{
putchar (':');
putchar (' ');
}
}
void pstr (char *str, unsigned mask)
{
if ((what & mask) == mask)
{
psep ();
fputs (str ?: "-", stdout);
}
}
void pint (off_t val, unsigned mask)
{
if ((what & mask) == mask)
{
psep ();
printf ("%ld", val);
}
}
switch (store->class)
{
case STORAGE_OTHER: kind_name = "other"; break;
case STORAGE_DEVICE: kind_name = "device"; break;
case STORAGE_HURD_FILE: kind_name = "file"; break;
case STORAGE_NETWORK: kind_name = "network"; break;
case STORAGE_MEMORY: kind_name = "memory"; break;
case STORAGE_TASK: kind_name = "task"; break;
case STORAGE_NULL: kind_name = "null"; break;
case STORAGE_CONCAT: kind_name = "concat"; break;
case STORAGE_LAYER: kind_name = "layer"; break;
case STORAGE_INTERLEAVE: kind_name = "interleave"; break;
default:
sprintf (unknown_kind_name, "%d", store->class);
kind_name = unknown_kind_name;
}
for (i = 0; i < level; i++)
{
putchar (' ');
putchar (' ');
}
pstr (kind_name, W_KIND);
if ((store->flags & STORAGE_MUTATED) && (what & W_KIND))
fputs ("/mutated", stdout);
pstr (store->name, W_NAME);
pint (store->block_size, W_BLOCK_SIZE);
pint (store->blocks, W_BLOCKS);
pint (store->size, W_SIZE);
if (what & W_RUNS)
{
psep ();
for (i = 0; i < store->num_runs; i++)
{
if (i > 0)
putchar (',');
if (store->runs[i].start < 0)
printf ("[%ld]", store->runs[i].length);
else
printf ("%ld[%ld]", store->runs[i].start, store->runs[i].length);
}
}
putchar ('\n');
if (what & W_CHILDREN)
/* Show info about stores that make up this one. */
for (i = 0; i < store->num_children; i++)
print_store (store->children[i], level + 1, what);
}
void
main(int argc, char *argv[])
{
int deref = 0, print_prefix = -1;
unsigned what = 0;
/* Parse our options... */
error_t parse_opt (int key, char *arg, struct argp_state *state)
{
void info (mach_port_t file, char *source, error_t err)
{
struct store *store;
if (file == MACH_PORT_NULL)
error (3, err, source);
if (print_prefix < 0)
/* By default, only print filename prefixes for multiple files. */
print_prefix = state->next < state->argc;
if (what == 0)
what = W_ALL;
err = store_create (file, &store);
if (err)
error (4, err, source);
print_store (store, 0, what);
store_free (store);
}
switch (key)
{
case 'L': deref = 1; break;
case 'p': print_prefix = 1; break;
case 'P': print_prefix = 0; break;
case 'k': what |= W_KIND; break;
case 'n': what |= W_NAME; break;
case 'b': what |= W_BLOCKS; break;
case 'B': what |= W_BLOCK_SIZE; break;
case 's': what |= W_SIZE; break;
case 'r': what |= W_RUNS; break;
case 'c': what |= W_CHILDREN; break;
case ARGP_KEY_NO_ARGS:
argp_usage (state);
case ARGP_KEY_ARG:
if (strcmp (arg, "-") == 0)
info (getdport (0), "-", 0);
else
{
file_t file = file_name_lookup (arg, deref ? 0 : O_NOLINK, 0);
info (file, arg, errno);
mach_port_deallocate (mach_task_self (), file);
}
break;
default:
return EINVAL;
}
return 0;
}
struct argp argp = {options, parse_opt, args_doc, doc};
argp_parse (&argp, argc, argv, 0, 0, 0);
exit(0);
}
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