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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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "mysys_priv.h"
#include <mystrings/m_string.h>
#include "my_static.h"
#include <stdlib.h>
static char *find_file_in_path(char *to,const char *name);
/* Finds where program can find it's files.
pre_pathname is found by first locking at progname (argv[0]).
if progname contains path the path is returned.
else if progname is found in path, return it
else if progname is given and POSIX environment variable "_" is set
then path is taken from "_".
If filename doesn't contain a path append MY_BASEDIR_VERSION or
MY_BASEDIR if defined, else append "/my/running".
own_path_name_part is concatinated to result.
my_path puts result in to and returns to */
char * my_path(char * to, const char *progname,
const char *own_pathname_part)
{
char *start, *end, *prog;
size_t to_length;
start=to; /* Return this */
if (progname && (dirname_part(to, progname, &to_length) ||
find_file_in_path(to,progname) ||
((prog=getenv("_")) != 0 &&
dirname_part(to, prog, &to_length))))
{
intern_filename(to,to);
if (!test_if_hard_path(to))
{
if (!getcwd(curr_dir,FN_REFLEN))
bchange((unsigned char*) to, 0, (unsigned char*) curr_dir, strlen(curr_dir), strlen(to)+1);
}
}
else
{
if ((end = getenv("MY_BASEDIR_VERSION")) == 0 &&
(end = getenv("MY_BASEDIR")) == 0)
{
#ifdef DEFAULT_BASEDIR
end= (char*) DEFAULT_BASEDIR;
#else
end= (char*) "/my/";
#endif
}
intern_filename(to,end);
to= strchr(to, '\0');
if (to != start && to[-1] != FN_LIBCHAR)
*to++ = FN_LIBCHAR;
strcpy(to,own_pathname_part);
}
return(start);
} /* my_path */
/* test if file without filename is found in path */
/* Returns to if found and to has dirpart if found, else NULL */
#define PATH_SEP ':'
static char *find_file_in_path(char *to, const char *name)
{
char *path,*pos,dir[2];
const char *ext="";
if (!(path=getenv("PATH")))
return NULL;
dir[0]=FN_LIBCHAR; dir[1]=0;
#ifdef PROGRAM_EXTENSION
if (!fn_ext(name)[0])
ext=PROGRAM_EXTENSION;
#endif
for (pos=path ; (pos=strchr(pos,PATH_SEP)) ; path= ++pos)
{
if (path != pos)
{
strxmov(my_stpncpy(to,path,(uint) (pos-path)),dir,name,ext,NULL);
if (!access(to,F_OK))
{
to[(uint) (pos-path)+1]=0; /* Return path only */
return to;
}
}
}
return NULL; /* File not found */
}
/* Test if hard pathname */
/* Returns true if dirname is a hard path */
bool test_if_hard_path(register const char *dir_name)
{
if (dir_name[0] == FN_HOMELIB && dir_name[1] == FN_LIBCHAR)
return (home_dir != NULL && test_if_hard_path(home_dir));
if (dir_name[0] == FN_LIBCHAR)
return (true);
return false;
} /* test_if_hard_path */
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