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/*
* cook - file construction tool
* Copyright (C) 2007 Peter Miller;
* All rights reserved.
*
* 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.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate symlinks
*/
#include <common/ac/errno.h>
#include <common/ac/unistd.h>
#include <common/error_intl.h>
#include <cook/os_interface.h>
int
os_symlink(string_ty *from, string_ty *to, int echo)
{
int err;
err = symlink(from->str_text, to->str_text);
if (err)
{
char link_content[2000];
if (errno != EEXIST)
{
sub_context_ty *scp;
whine:
scp = sub_context_new();
sub_var_set_string(scp, "File_Name_1", from);
sub_var_set_string(scp, "File_Name_2", to);
error_intl(scp, i18n("symlink($filename1, $filename2): $errno"));
sub_context_delete(scp);
return -1;
}
err = readlink(to->str_text, link_content, sizeof(link_content));
if (err < 0)
{
if (errno != EINVAL)
{
sub_context_ty *scp;
scp = sub_context_new();
sub_var_set_string(scp, "File_Name", to);
error_intl(scp, i18n("readlink \"$filename\": $errno"));
sub_context_delete(scp);
return -1;
}
}
else
{
string_ty *s2;
int ok;
s2 = str_n_from_c(link_content, err);
ok = str_equal(s2, from);
str_free(s2);
if (ok)
return 0;
}
err = unlink(to->str_text);
if (err < 0)
{
error_intl_unlink(to->str_text);
return -1;
}
if (echo)
{
sub_context_ty *scp;
scp = sub_context_new();
sub_var_set_string(scp, "File_Name", to);
error_intl(scp, i18n("rm $filename"));
sub_context_delete(scp);
}
err = symlink(from->str_text, to->str_text);
if (err < 0)
goto whine;
}
if (echo)
{
sub_context_ty *scp;
scp = sub_context_new();
sub_var_set_string(scp, "File_Name_1", from);
sub_var_set_string(scp, "File_Name_2", to);
error_intl(scp, i18n("ln -s $filename1 $filename2"));
sub_context_delete(scp);
}
return 0;
}
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