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/* Copyright (C) 2000 MySQL AB
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 02111-1307 USA */
/* my_setwd() and my_getwd() works with intern_filenames !! */
#include "mysys_priv.h"
#include <m_string.h>
#include "mysys_err.h"
#ifdef HAVE_GETWD
#include <sys/param.h>
#endif
#if defined(MSDOS) || defined(__WIN__)
#include <m_ctype.h>
#include <dos.h>
#include <direct.h>
#endif
#if defined(OS2)
#include <direct.h>
#endif
#ifdef __EMX__
// chdir2 support also drive change
#define chdir _chdir2
#endif
/* Gets current working directory in buff. Directory is allways ended
with FN_LIBCHAR */
/* One must pass a buffer to my_getwd. One can allways use
curr_dir[] */
int my_getwd(my_string buf, uint size, myf MyFlags)
{
my_string pos;
DBUG_ENTER("my_getwd");
DBUG_PRINT("my",("buf: %lx size: %d MyFlags %d", buf,size,MyFlags));
#if ! defined(MSDOS)
if (curr_dir[0]) /* Current pos is saved here */
VOID(strmake(buf,&curr_dir[0],size-1));
else
#endif
{
#if defined(HAVE_GETCWD)
if (!getcwd(buf,size-2) && MyFlags & MY_WME)
{
my_errno=errno;
my_error(EE_GETWD,MYF(ME_BELL+ME_WAITTANG),errno);
return(-1);
}
#elif defined(HAVE_GETWD)
{
char pathname[MAXPATHLEN];
getwd(pathname);
strmake(buf,pathname,size-1);
}
#elif defined(VMS)
if (!getcwd(buf,size-2,1) && MyFlags & MY_WME)
{
my_errno=errno;
my_error(EE_GETWD,MYF(ME_BELL+ME_WAITTANG),errno);
return(-1);
}
intern_filename(buf,buf);
#else
#error "No way to get current directory"
#endif
if (*((pos=strend(buf))-1) != FN_LIBCHAR) /* End with FN_LIBCHAR */
{
pos[0]= FN_LIBCHAR;
pos[1]=0;
}
(void) strmake(&curr_dir[0],buf,(size_s) (FN_REFLEN-1));
}
DBUG_RETURN(0);
} /* my_getwd */
/* Set new working directory */
int my_setwd(const char *dir, myf MyFlags)
{
int res;
size_s length;
my_string start,pos;
#if defined(VMS) || defined(MSDOS) || defined(OS2)
char buff[FN_REFLEN];
#endif
DBUG_ENTER("my_setwd");
DBUG_PRINT("my",("dir: '%s' MyFlags %d", dir, MyFlags));
start=(my_string) dir;
#if defined(MSDOS) || defined(OS2) /* OS2/MSDOS chdir can't change drive */
#if !defined(_DDL) && !defined(WIN32)
if ((pos=(char*) strchr(dir,FN_DEVCHAR)) != 0)
{
uint drive,drives;
pos++; /* Skipp FN_DEVCHAR */
drive=(uint) (my_toupper(system_charset_info,dir[0])-'A'+1);
drives= (uint) -1;
if ((pos-(byte*) dir) == 2 && drive > 0 && drive < 32)
{
#ifdef OS2
_chdrive(drive);
drives = _getdrive();
#else
_dos_setdrive(drive,&drives);
_dos_getdrive(&drives);
#endif
}
if (drive != drives)
{
*pos='\0'; /* Dir is now only drive */
my_errno=errno;
my_error(EE_SETWD,MYF(ME_BELL+ME_WAITTANG),dir,ENOENT);
DBUG_RETURN(-1);
}
dir=pos; /* drive changed, change now path */
}
#endif
if (*((pos=strend(dir)-1)) == FN_LIBCHAR && pos != dir)
{
strmov(buff,dir)[-1]=0; /* Remove last '/' */
dir=buff;
}
#endif /* MSDOS*/
if (! dir[0] || (dir[0] == FN_LIBCHAR && dir[1] == 0))
dir=FN_ROOTDIR;
#ifdef VMS
{
pos=strmov(buff,dir);
if (pos[-1] != FN_LIBCHAR)
{
pos[0]=FN_LIBCHAR; /* Mark as directory */
pos[1]=0;
}
system_filename(buff,buff); /* Change to VMS format */
dir=buff;
}
#endif /* VMS */
if ((res=chdir((char*) dir)) != 0)
{
my_errno=errno;
if (MyFlags & MY_WME)
my_error(EE_SETWD,MYF(ME_BELL+ME_WAITTANG),start,errno);
}
else
{
if (test_if_hard_path(start))
{ /* Hard pathname */
pos=strmake(&curr_dir[0],start,(size_s) FN_REFLEN-1);
if (pos[-1] != FN_LIBCHAR)
{
length=(uint) (pos-(char*) curr_dir);
curr_dir[length]=FN_LIBCHAR; /* must end with '/' */
curr_dir[length+1]='\0';
}
}
else
curr_dir[0]='\0'; /* Don't save name */
}
DBUG_RETURN(res);
} /* my_setwd */
/* Test if hard pathname */
/* Returns 1 if dirname is a hard path */
int test_if_hard_path(register const char *dir_name)
{
if (dir_name[0] == FN_HOMELIB && dir_name[1] == FN_LIBCHAR)
return (home_dir != NullS && test_if_hard_path(home_dir));
if (dir_name[0] == FN_LIBCHAR)
return (TRUE);
#ifdef FN_DEVCHAR
return (strchr(dir_name,FN_DEVCHAR) != 0);
#else
return FALSE;
#endif
} /* test_if_hard_path */
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