diff options
Diffstat (limited to 'mysql/mysys/my_symlink2.c')
| -rw-r--r-- | mysql/mysys/my_symlink2.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/mysql/mysys/my_symlink2.c b/mysql/mysys/my_symlink2.c deleted file mode 100644 index 0540b47..0000000 --- a/mysql/mysys/my_symlink2.c +++ /dev/null @@ -1,195 +0,0 @@ -/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. 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; version 2 of the License. - - 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ - -/* - Advanced symlink handling. - This is used in MyISAM to let users symlinks tables to different disk. - The main idea with these functions is to automaticly create, delete and - rename files and symlinks like they would be one unit. -*/ - -#include "mysys_priv.h" -#include "my_sys.h" -#include "mysys_err.h" -#include <m_string.h> -#include "my_thread_local.h" - -File my_create_with_symlink(const char *linkname, const char *filename, - int createflags, int access_flags, myf MyFlags) -{ - File file; - int tmp_errno; - /* Test if we should create a link */ - int create_link; - char abs_linkname[FN_REFLEN]; - DBUG_ENTER("my_create_with_symlink"); - DBUG_PRINT("enter", ("linkname: %s filename: %s", - linkname ? linkname : "(null)", - filename ? filename : "(null)")); - - if (!my_enable_symlinks) - { - DBUG_PRINT("info", ("Symlinks disabled")); - /* Create only the file, not the link and file */ - create_link= 0; - if (linkname) - filename= linkname; - } - else - { - if (linkname) - my_realpath(abs_linkname, linkname, MYF(0)); - create_link= (linkname && strcmp(abs_linkname,filename)); - } - - if (!(MyFlags & MY_DELETE_OLD)) - { - if (!access(filename,F_OK)) - { - char errbuf[MYSYS_STRERROR_SIZE]; - errno= EEXIST; - set_my_errno(EEXIST); - my_error(EE_CANTCREATEFILE, MYF(0), filename, - EEXIST, my_strerror(errbuf, sizeof(errbuf), EEXIST)); - DBUG_RETURN(-1); - } - if (create_link && !access(linkname,F_OK)) - { - char errbuf[MYSYS_STRERROR_SIZE]; - errno= EEXIST; - set_my_errno(EEXIST); - my_error(EE_CANTCREATEFILE, MYF(0), linkname, - EEXIST, my_strerror(errbuf, sizeof(errbuf), EEXIST)); - DBUG_RETURN(-1); - } - } - - if ((file=my_create(filename, createflags, access_flags, MyFlags)) >= 0) - { - if (create_link) - { - /* Delete old link/file */ - if (MyFlags & MY_DELETE_OLD) - my_delete(linkname, MYF(0)); - /* Create link */ - if (my_symlink(filename, linkname, MyFlags)) - { - /* Fail, remove everything we have done */ - tmp_errno=my_errno(); - my_close(file,MYF(0)); - my_delete(filename, MYF(0)); - file= -1; - set_my_errno(tmp_errno); - } - } - } - DBUG_RETURN(file); -} - -/* - If the file was a symlink, delete both symlink and the file which the - symlink pointed to. -*/ - -int my_delete_with_symlink(const char *name, myf MyFlags) -{ - char link_name[FN_REFLEN]; - int was_symlink= (my_enable_symlinks && - !my_readlink(link_name, name, MYF(0))); - int result; - DBUG_ENTER("my_delete_with_symlink"); - - if (!(result=my_delete(name, MyFlags))) - { - if (was_symlink) - result=my_delete(link_name, MyFlags); - } - DBUG_RETURN(result); -} - -/* - If the file is a normal file, just rename it. - If the file is a symlink: - - Create a new file with the name 'to' that points at - symlink_dir/basename(to) - - Rename the symlinked file to symlink_dir/basename(to) - - Delete 'from' - If something goes wrong, restore everything. -*/ - -int my_rename_with_symlink(const char *from, const char *to, myf MyFlags) -{ -#ifndef HAVE_READLINK - return my_rename(from, to, MyFlags); -#else - char link_name[FN_REFLEN], tmp_name[FN_REFLEN]; - int was_symlink= (my_enable_symlinks && - !my_readlink(link_name, from, MYF(0))); - int result=0; - int name_is_different; - DBUG_ENTER("my_rename_with_symlink"); - - if (!was_symlink) - DBUG_RETURN(my_rename(from, to, MyFlags)); - - /* Change filename that symlink pointed to */ - my_stpcpy(tmp_name, to); - fn_same(tmp_name,link_name,1); /* Copy dir */ - name_is_different= strcmp(link_name, tmp_name); - if (name_is_different && !access(tmp_name, F_OK)) - { - set_my_errno(EEXIST); - if (MyFlags & MY_WME) - { - char errbuf[MYSYS_STRERROR_SIZE]; - my_error(EE_CANTCREATEFILE, MYF(0), tmp_name, - EEXIST, my_strerror(errbuf, sizeof(errbuf), EEXIST)); - } - DBUG_RETURN(1); - } - - /* Create new symlink */ - if (my_symlink(tmp_name, to, MyFlags)) - DBUG_RETURN(1); - - /* - Rename symlinked file if the base name didn't change. - This can happen if you use this function where 'from' and 'to' has - the same basename and different directories. - */ - - if (name_is_different && my_rename(link_name, tmp_name, MyFlags)) - { - int save_errno=my_errno(); - my_delete(to, MyFlags); /* Remove created symlink */ - set_my_errno(save_errno); - DBUG_RETURN(1); - } - - /* Remove original symlink */ - if (my_delete(from, MyFlags)) - { - int save_errno=my_errno(); - /* Remove created link */ - my_delete(to, MyFlags); - /* Rename file back */ - if (strcmp(link_name, tmp_name)) - (void) my_rename(tmp_name, link_name, MyFlags); - set_my_errno(save_errno); - result= 1; - } - DBUG_RETURN(result); -#endif /* HAVE_READLINK */ -} |