calcsize.c

开源备份软件源码 AMANDA, the Advanced Maryland Automatic Network Disk Archiver, is a backup system that a

/*
 * Amanda, The Advanced Maryland Automatic Network Disk Archiver
 * Copyright (c) 1991-1998 University of Maryland at College Park
 * All Rights Reserved.
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of U.M. not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  U.M. makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Authors: the Amanda Development Team.  Its members are listed in a
 * file named AUTHORS, in the root directory of this distribution.
 */
/* 
 * $Id: calcsize.c,v 1.44 2006/07/25 18:27:56 martinea Exp $
 *
 * traverse directory tree to get backup size estimates
 *
 * argv[0] is the calcsize program name
 * argv[1] is the config name or NOCONFIG
 */
#include "amanda.h"
#include "fsusage.h"
#include "version.h"
#include "sl.h"
#include "util.h"

#define ROUND(n,x)	((x) + (n) - 1 - (((x) + (n) - 1) % (n)))

/*
static off_t
round_function(n, x)
    off_t	n,
    off_t	x)
{
  unsigned long remainder = x % n;
  if (remainder)
    x += n - remainder;
  return x;
}
*/

#define ST_BLOCKS(s)							       \
	    (((((off_t)(s).st_blocks * (off_t)512) <= (s).st_size)) ?	       \
	      ((off_t)(s).st_blocks + (off_t)1) :			       \
	      ((s).st_size / (off_t)512 +				       \
		(off_t)((((s).st_size % (off_t)512) != (off_t)0) ?	       \
		(off_t)1 : (off_t)0)))

#define	FILETYPES	(S_IFREG|S_IFLNK|S_IFDIR)

typedef struct name_s {
    struct name_s *next;
    char *str;
} Name;

Name *name_stack;

#define MAXDUMPS 10

struct {
    int max_inode;
    int total_dirs;
    int total_files;
    off_t total_size;
    off_t total_size_name;
} dumpstats[MAXDUMPS];

time_t dumpdate[MAXDUMPS];
int  dumplevel[MAXDUMPS];
int ndumps;

void (*add_file_name)(int, char *);
void (*add_file)(int, struct stat *);
off_t (*final_size)(int, char *);


int main(int, char **);
void traverse_dirs(char *, char *);


void add_file_name_dump(int, char *);
void add_file_dump(int, struct stat *);
off_t final_size_dump(int, char *);

void add_file_name_star(int, char *);
void add_file_star(int, struct stat *);
off_t final_size_star(int, char *);

void add_file_name_gnutar(int, char *);
void add_file_gnutar(int, struct stat *);
off_t final_size_gnutar(int, char *);

void add_file_name_unknown(int, char *);
void add_file_unknown(int, struct stat *);
off_t final_size_unknown(int, char *);

sl_t *calc_load_file(char *filename);
int calc_check_exclude(char *filename);

int use_star_excl = 0;
int use_gtar_excl = 0;
sl_t *include_sl=NULL, *exclude_sl=NULL;

int
main(
    int		argc,
    char **	argv)
{
#ifdef TEST
/* standalone test to ckeck wether the calculated file size is ok */
    struct stat finfo;
    int i;
    off_t dump_total = (off_t)0;
    off_t gtar_total = (off_t)0;
    char *d;
    int l, w;

    /*
     * Configure program for internationalization:
     *   1) Only set the message locale for now.
     *   2) Set textdomain for all amanda related programs to "amanda"
     *      We don't want to be forced to support dozens of message catalogs.
     */  
    setlocale(LC_MESSAGES, "C");
    textdomain("amanda"); 

    safe_fd(-1, 0);

    set_pname("calcsize");

    dbopen(NULL);

    /* Don't die when child closes pipe */
    signal(SIGPIPE, SIG_IGN);

    if (argc < 2) {
	g_fprintf(stderr,_("Usage: %s file[s]\n"),argv[0]);
	return 1;
    }
    for(i=1; i<argc; i++) {
	if(lstat(argv[i], &finfo) == -1) {
	    g_fprintf(stderr, "%s: %s\n", argv[i], strerror(errno));
	    continue;
	}
	g_printf("%s: st_size=%lu", argv[i],(unsigned long)finfo.st_size);
	g_printf(": blocks=%llu\n", ST_BLOCKS(finfo));
	dump_total += (ST_BLOCKS(finfo) + (off_t)1) / (off_t)2 + (off_t)1;
	gtar_total += ROUND(4,(ST_BLOCKS(finfo) + (off_t)1));
    }
    g_printf("           gtar           dump\n");
    g_printf("total      %-9lu         %-9lu\n",gtar_total,dump_total);
    return 0;
#else
    int i;
    char *dirname=NULL;
    char *amname=NULL, *qamname=NULL;
    char *filename=NULL, *qfilename = NULL;

    /* drop root privileges; we'll regain them for the required operations */
#ifdef WANT_SETUID_CLIENT
    if (!set_root_privs(0)) {
	error(_("calcsize must be run setuid root"));
    }
#endif

    safe_fd(-1, 0);
    safe_cd();

    set_pname("calcsize");

    dbopen(DBG_SUBDIR_CLIENT);
    dbprintf(_("version %s\n"), version());

#if 0
    erroutput_type = (ERR_INTERACTIVE|ERR_SYSLOG);
#endif

    argc--, argv++;	/* skip program name */

    /* need at least program, amname, and directory name */

    if(argc < 4) {
	error(_("Usage: %s config [DUMP|STAR|GNUTAR] name dir [-X exclude-file] [-I include-file] [level date]*"),
	      get_pname());
        /*NOTREACHED*/
    }

    dbprintf(_("config: %s\n"), *argv);
    if (strcmp(*argv, "NOCONFIG") != 0) {
	dbrename(*argv, DBG_SUBDIR_CLIENT);
    }
    argc--;
    argv++;

    check_running_as(RUNNING_AS_CLIENT_LOGIN);

    /* parse backup program name */

    if(strcmp(*argv, "DUMP") == 0) {
#if !defined(DUMP) && !defined(XFSDUMP)
	error("dump not available on this system");
	/*NOTREACHED*/
#else
	add_file_name = add_file_name_dump;
	add_file = add_file_dump;
	final_size = final_size_dump;
#endif
    }
    else if(strcmp(*argv, "GNUTAR") == 0) {
#ifndef GNUTAR
	error("gnutar not available on this system");
	/*NOTREACHED*/
#else
	add_file_name = add_file_name_gnutar;
	add_file = add_file_gnutar;
	final_size = final_size_gnutar;
	use_gtar_excl++;
#endif
    }
    else {
	add_file_name = add_file_name_unknown;
	add_file = add_file_unknown;
	final_size = final_size_unknown;
    }
    argc--, argv++;

    /* the amanda name can be different from the directory name */

    if (argc > 0) {
	amname = *argv;
	qamname = quote_string(amname);
	argc--, argv++;
    } else {
	error("missing <name>");
	/*NOTREACHED*/
    }

    /* the toplevel directory name to search from */
    if (argc > 0) {
	dirname = *argv;
	argc--, argv++;
    } else {
	error("missing <dir>");
	/*NOTREACHED*/
    }

    if ((argc > 1) && strcmp(*argv,"-X") == 0) {
	argv++;

	if (!(use_gtar_excl || use_star_excl)) {
	  error("exclusion specification not supported");
	  /*NOTREACHED*/
	}
	
	filename = stralloc(*argv);
	qfilename = quote_string(filename);
	if (access(filename, R_OK) != 0) {
	    g_fprintf(stderr,"Cannot open exclude file %s\n", qfilename);
	    use_gtar_excl = use_star_excl = 0;
	} else {
	    exclude_sl = calc_load_file(filename);
	    if (!exclude_sl) {
		g_fprintf(stderr,"Cannot open exclude file %s: %s\n", qfilename,
			strerror(errno));
		use_gtar_excl = use_star_excl = 0;
	    }
	}
	amfree(qfilename);
	amfree(filename);
	argc -= 2;
	argv++;
    } else {
	use_gtar_excl = use_star_excl = 0;
    }

    if ((argc > 1) && strcmp(*argv,"-I") == 0) {
	argv++;
	
	filename = stralloc(*argv);
	qfilename = quote_string(filename);
	if (access(filename, R_OK) != 0) {
	    g_fprintf(stderr,"Cannot open include file %s\n", qfilename);
	    use_gtar_excl = use_star_excl = 0;
	} else {
	    include_sl = calc_load_file(filename);
	    if (!include_sl) {
		g_fprintf(stderr,"Cannot open include file %s: %s\n", qfilename,
			strerror(errno));
		use_gtar_excl = use_star_excl = 0;
	    }
	}
	amfree(qfilename);
	amfree(filename);
	argc -= 2;
	argv++;
    }

    /* the dump levels to calculate sizes for */

    ndumps = 0;
    while(argc >= 2) {
	if(ndumps < MAXDUMPS) {
	    dumplevel[ndumps] = atoi(argv[0]);
	    dumpdate [ndumps] = (time_t) atol(argv[1]);
	    ndumps++;
	    argc -= 2, argv += 2;
	}
    }

    if(argc) {
	error("leftover arg \"%s\", expected <level> and <date>", *argv);
	/*NOTREACHED*/
    }

    if(is_empty_sl(include_sl)) {
	traverse_dirs(dirname,".");
    }
    else {
	sle_t *an_include = include_sl->first;
	while(an_include != NULL) {
/*
	    char *adirname = stralloc2(dirname, an_include->name+1);
	    traverse_dirs(adirname);
	    amfree(adirname);
*/
	    traverse_dirs(dirname, an_include->name);
	    an_include = an_include->next;
	}
    }
    for(i = 0; i < ndumps; i++) {

	amflock(1, "size");

	dbprintf("calcsize: %s %d SIZE %lld\n",
	       qamname, dumplevel[i],
	       (long long)final_size(i, dirname));
	g_fprintf(stderr, "%s %d SIZE %lld\n",
	       qamname, dumplevel[i],
	       (long long)final_size(i, dirname));
	fflush(stderr);

	amfunlock(1, "size");
    }
    amfree(qamname);

    return 0;
#endif
}