1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163
|
/* $Id$
Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: jan@swi.psy.uva.nl
WWW: http://www.swi-prolog.org
Copyright (C): 1985-2002, University of Amsterdam
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <SWI-Prolog.h>
#include "clib.h"
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <errno.h>
static functor_t FUNCTOR_access1;
static functor_t FUNCTOR_modified1;
static functor_t FUNCTOR_changed1;
static atom_t ATOM_now;
static int
add_time_option(term_t list, functor_t f, time_t time)
{ term_t tail = PL_copy_term_ref(list);
term_t head = PL_new_term_ref();
while(PL_get_list(tail, head, tail))
{ if ( PL_unify_functor(head, f) )
{ term_t a = PL_new_term_ref();
return (PL_get_arg(1, head, a) &&
PL_unify_float(a, (double)time));
}
}
if ( PL_unify_list(tail, head, tail) )
return PL_unify_term(head, PL_FUNCTOR, f, PL_FLOAT, (double)time);
return FALSE;
}
static int
close_list(term_t list)
{ term_t tail = PL_copy_term_ref(list);
term_t head = PL_new_term_ref();
while(PL_get_list(tail, head, tail))
;
return PL_unify_nil(tail);
}
static int
get_time_option(term_t list, functor_t f, time_t def, time_t *tme)
{ term_t tail = PL_copy_term_ref(list);
term_t head = PL_new_term_ref();
while(PL_get_list(tail, head, tail))
{ if ( PL_is_functor(head, f) )
{ term_t a = PL_new_term_ref();
double f;
_PL_get_arg(1, head, a);
if ( !PL_get_float(a, &f) )
{ atom_t now;
if ( PL_get_atom(a, &now) && now == ATOM_now )
{ time(tme);
return TRUE;
} else
return pl_error(NULL, 0, NULL, ERR_TYPE, a, "time");
}
*tme = (long)f;
return TRUE;
}
}
*tme = def;
return TRUE;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
set_file_time(+Spec, -Old, +New)
Query/set file-times.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
static foreign_t
pl_set_time_file(term_t spec, term_t old, term_t new)
{ char *name;
struct stat sbuf;
if ( !PL_get_file_name(spec, &name, 0) )
return FALSE;
if ( stat(name, &sbuf) )
return pl_error(NULL, 0, NULL, ERR_ERRNO, errno, "stat", "file", spec);
add_time_option(old, FUNCTOR_access1, sbuf.st_atime);
add_time_option(old, FUNCTOR_modified1, sbuf.st_mtime);
add_time_option(old, FUNCTOR_changed1, sbuf.st_ctime);
close_list(old);
if ( !PL_get_nil(new) )
#ifdef HAVE_UTIME
{ struct utimbuf tbuf;
if ( !get_time_option(new, FUNCTOR_access1,
sbuf.st_atime, &tbuf.actime) )
return FALSE;
if ( !get_time_option(new, FUNCTOR_modified1,
sbuf.st_mtime, &tbuf.modtime) )
return FALSE;
if ( utime(name, &tbuf) != 0 )
return pl_error(NULL, 0, NULL, ERR_ERRNO, errno, "set_time", "file", spec);
}
#else
return pl_error(NULL, 0, NULL, ERR_NOTIMPLEMENTED, "set_time", name);
#endif
return TRUE;
}
install_t
install_files()
{ FUNCTOR_access1 = PL_new_functor(PL_new_atom("access"), 1);
FUNCTOR_modified1 = PL_new_functor(PL_new_atom("modified"), 1);
FUNCTOR_changed1 = PL_new_functor(PL_new_atom("changed"), 1);
ATOM_now = PL_new_atom("now");
PL_register_foreign("set_time_file", 3, pl_set_time_file, 0);
}
|