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622b6a1275a0e204d82663322bc454e5879ae142
mariadb/mysys/default.c
jonas@perch.ndb.mysql.com b43d0f0495 Merge perch.ndb.mysql.com:/home/jonas/src/mysql-5.0 
into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.0-push
2005-09-30 12:25:39 +02:00

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/* Copyright (C) 2000-2003 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 */
/****************************************************************************
Add all options from files named "group".cnf from the default_directories
before the command line arguments.
On Windows defaults will also search in the Windows directory for a file
called 'group'.ini
As long as the program uses the last argument for conflicting
options one only have to add a call to "load_defaults" to enable
use of default values.
pre- and end 'blank space' are removed from options and values. The
following escape sequences are recognized in values: \b \t \n \r \\
The following arguments are handled automaticly; If used, they must be
first argument on the command line!
--no-defaults ; no options are read.
--defaults-file=full-path-to-default-file ; Only this file will be read.
--defaults-extra-file=full-path-to-default-file ; Read this file before ~/
--defaults-group-suffix ; Also read groups with concat(group, suffix)
--print-defaults ; Print the modified command line and exit
****************************************************************************/
#include "mysys_priv.h"
#include "m_string.h"
#include "m_ctype.h"
#include <my_dir.h>
#ifdef __WIN__
#include <winbase.h>
#endif
const char *defaults_file=0;
const char *defaults_group_suffix=0;
char *defaults_extra_file=0;
/* Which directories are searched for options (and in which order) */
#define MAX_DEFAULT_DIRS 6
const char *default_directories[MAX_DEFAULT_DIRS + 1];
#ifdef __WIN__
static const char *f_extensions[]= { ".ini", ".cnf", 0 };
#define NEWLINE "\r\n"
static char system_dir[FN_REFLEN], shared_system_dir[FN_REFLEN],
config_dir[FN_REFLEN];
#else
static const char *f_extensions[]= { ".cnf", 0 };
#define NEWLINE "\n"
#endif
static int handle_default_option(void *in_ctx, const char *group_name,
const char *option);
/*
This structure defines the context that we pass to callback
function 'handle_default_option' used in search_default_file
to process each option. This context is used if search_default_file
was called from load_defaults.
*/
struct handle_option_ctx
{
MEM_ROOT *alloc;
DYNAMIC_ARRAY *args;
TYPELIB *group;
};
static int search_default_file(Process_option_func func, void *func_ctx,
const char *dir, const char *config_file);
static int search_default_file_with_ext(Process_option_func func,
void *func_ctx,
const char *dir, const char *ext,
const char *config_file, int recursion_level);
static void init_default_directories();
static char *remove_end_comment(char *ptr);
/*
Process config files in default directories.
SYNOPSIS
my_search_option_files()
conf_file Basename for configuration file to search for.
If this is a path, then only this file is read.
argc Pointer to argc of original program
argv Pointer to argv of original program
args_used Pointer to variable for storing the number of
arguments used.
func Pointer to the function to process options
func_ctx It's context. Usually it is the structure to
store additional options.
DESCRIPTION
Process the default options from argc & argv
Read through each found config file looks and calls 'func' to process
each option.
NOTES
--defaults-group-suffix is only processed if we are called from
load_defaults().
RETURN
0 ok
1 given cinf_file doesn't exist
The global variable 'defaults_group_suffix' is updated with value for
--defaults_group_suffix
*/
int my_search_option_files(const char *conf_file, int *argc, char ***argv,
uint *args_used, Process_option_func func,
void *func_ctx)
{
const char **dirs, *forced_default_file, *forced_extra_defaults;
int error= 0;
DBUG_ENTER("my_search_option_files");
/* Check if we want to force the use a specific default file */
*args_used+= get_defaults_options(*argc - *args_used, *argv + *args_used,
(char **) &forced_default_file,
(char **) &forced_extra_defaults,
(char **) &defaults_group_suffix);
if (! defaults_group_suffix)
defaults_group_suffix= getenv(STRINGIFY_ARG(DEFAULT_GROUP_SUFFIX_ENV));
if (forced_extra_defaults)
defaults_extra_file= (char *) forced_extra_defaults;
if (forced_default_file)
defaults_file= forced_default_file;
/*
We can only handle 'defaults-group-suffix' if we are called from
load_defaults() as otherwise we can't know the type of 'func_ctx'
*/
if (defaults_group_suffix && func == handle_default_option)
{
/* Handle --defaults-group-suffix= */
uint i;
const char **extra_groups;
const uint instance_len= strlen(defaults_group_suffix);
struct handle_option_ctx *ctx= (struct handle_option_ctx*) func_ctx;
char *ptr;
TYPELIB *group= ctx->group;
if (!(extra_groups=
(const char**)alloc_root(ctx->alloc,
(2*group->count+1)*sizeof(char*))))
goto err;
for (i= 0; i < group->count; i++)
{
uint len;
extra_groups[i]= group->type_names[i]; /** copy group */
len= strlen(extra_groups[i]);
if (!(ptr= alloc_root(ctx->alloc, len+instance_len+1)))
goto err;
extra_groups[i+group->count]= ptr;
/** Construct new group */
memcpy(ptr, extra_groups[i], len);
memcpy(ptr+len, defaults_group_suffix, instance_len+1);
}
group->count*= 2;
group->type_names= extra_groups;
group->type_names[group->count]= 0;
}
if (forced_default_file)
{
if ((error= search_default_file_with_ext(func, func_ctx, "", "",
forced_default_file, 0)) < 0)
goto err;
if (error > 0)
{
fprintf(stderr, "Could not open required defaults file: %s\n",
forced_default_file);
goto err;
}
}
else if (dirname_length(conf_file))
{
if ((error= search_default_file(func, func_ctx, NullS, conf_file)) < 0)
goto err;
}
else
{
for (dirs= default_directories ; *dirs; dirs++)
{
if (**dirs)
{
if (search_default_file(func, func_ctx, *dirs, conf_file) < 0)
goto err;
}
else if (defaults_extra_file)
{
if ((error= search_default_file_with_ext(func, func_ctx, "", "",
defaults_extra_file, 0)) < 0)
goto err; /* Fatal error */
if (error > 0)
{
fprintf(stderr, "Could not open required defaults file: %s\n",
defaults_extra_file);
goto err;
}
}
}
}
DBUG_RETURN(error);
err:
fprintf(stderr,"Fatal error in defaults handling. Program aborted\n");
exit(1);
return 0; /* Keep compiler happy */
}
/*
The option handler for load_defaults.
SYNOPSIS
handle_deault_option()
in_ctx Handler context. In this case it is a
handle_option_ctx structure.
group_name The name of the group the option belongs to.
option The very option to be processed. It is already
prepared to be used in argv (has -- prefix)
DESCRIPTION
This handler checks whether a group is one of the listed and adds an option
to the array if yes. Some other handler can record, for instance, all
groups and their options, not knowing in advance the names and amount of
groups.
RETURN
0 - ok
1 - error occured
*/
static int handle_default_option(void *in_ctx, const char *group_name,
const char *option)
{
char *tmp;
struct handle_option_ctx *ctx= (struct handle_option_ctx *) in_ctx;
if (find_type((char *)group_name, ctx->group, 3))
{
if (!(tmp= alloc_root(ctx->alloc, (uint) strlen(option) + 1)))
return 1;
if (insert_dynamic(ctx->args, (gptr) &tmp))
return 1;
strmov(tmp, option);
}
return 0;
}
/*
Gets options from the command line
SYNOPSIS
get_defaults_options()
argc Pointer to argc of original program
argv Pointer to argv of original program
defaults --defaults-file option
extra_defaults --defaults-extra-file option
RETURN
# Number of arguments used from *argv
defaults and extra_defaults will be set to option of the appropriate
items of argv array, or to NULL if there are no such options
*/
int get_defaults_options(int argc, char **argv,
char **defaults,
char **extra_defaults,
char **group_suffix)
{
int org_argc= argc, prev_argc= 0;
*defaults= *extra_defaults= *group_suffix= 0;
while (argc >= 2 && argc != prev_argc)
{
/* Skip program name or previously handled argument */
argv++;
prev_argc= argc; /* To check if we found */
if (!*defaults && is_prefix(*argv,"--defaults-file="))
{
*defaults= *argv + sizeof("--defaults-file=")-1;
argc--;
continue;
}
if (!*extra_defaults && is_prefix(*argv,"--defaults-extra-file="))
{
*extra_defaults= *argv + sizeof("--defaults-extra-file=")-1;
argc--;
continue;
}
if (!*group_suffix && is_prefix(*argv, "--defaults-group-suffix="))
{
*group_suffix= *argv + sizeof("--defaults-group-suffix=")-1;
argc--;
continue;
}
}
return org_argc - argc;
}
/*
Read options from configurations files
SYNOPSIS
load_defaults()
conf_file Basename for configuration file to search for.
If this is a path, then only this file is read.
groups Which [group] entrys to read.
Points to an null terminated array of pointers
argc Pointer to argc of original program
argv Pointer to argv of original program
IMPLEMENTATION
Read options from configuration files and put them BEFORE the arguments
that are already in argc and argv. This way the calling program can
easily command line options override options in configuration files
NOTES
In case of fatal error, the function will print a warning and do
exit(1)
To free used memory one should call free_defaults() with the argument
that was put in *argv
RETURN
0 ok
1 The given conf_file didn't exists
*/
int load_defaults(const char *conf_file, const char **groups,
int *argc, char ***argv)
{
DYNAMIC_ARRAY args;
TYPELIB group;
my_bool found_print_defaults= 0;
uint args_used= 0;
int error= 0;
MEM_ROOT alloc;
char *ptr,**res;
struct handle_option_ctx ctx;
DBUG_ENTER("load_defaults");
init_default_directories();
init_alloc_root(&alloc,512,0);
/*
Check if the user doesn't want any default option processing
--no-defaults is always the first option
*/
if (*argc >= 2 && !strcmp(argv[0][1],"--no-defaults"))
{
/* remove the --no-defaults argument and return only the other arguments */
uint i;
if (!(ptr=(char*) alloc_root(&alloc,sizeof(alloc)+
(*argc + 1)*sizeof(char*))))
goto err;
res= (char**) (ptr+sizeof(alloc));
res[0]= **argv; /* Copy program name */
for (i=2 ; i < (uint) *argc ; i++)
res[i-1]=argv[0][i];
res[i-1]=0; /* End pointer */
(*argc)--;
*argv=res;
*(MEM_ROOT*) ptr= alloc; /* Save alloc root for free */
DBUG_RETURN(0);
}
group.count=0;
group.name= "defaults";
group.type_names= groups;
for (; *groups ; groups++)
group.count++;
if (my_init_dynamic_array(&args, sizeof(char*),*argc, 32))
goto err;
ctx.alloc= &alloc;
ctx.args= &args;
ctx.group= &group;
error= my_search_option_files(conf_file, argc, argv, &args_used,
handle_default_option, (void *) &ctx);
/*
Here error contains <> 0 only if we have a fully specified conf_file
or a forced default file
*/
if (!(ptr=(char*) alloc_root(&alloc,sizeof(alloc)+
(args.elements + *argc +1) *sizeof(char*))))
goto err;
res= (char**) (ptr+sizeof(alloc));
/* copy name + found arguments + command line arguments to new array */
res[0]= argv[0][0]; /* Name MUST be set, even by embedded library */
memcpy((gptr) (res+1), args.buffer, args.elements*sizeof(char*));
/* Skip --defaults-xxx options */
(*argc)-= args_used;
(*argv)+= args_used;
/*
Check if we wan't to see the new argument list
This options must always be the last of the default options
*/
if (*argc >= 2 && !strcmp(argv[0][1],"--print-defaults"))
{
found_print_defaults=1;
--*argc; ++*argv; /* skip argument */
}
if (*argc)
memcpy((gptr) (res+1+args.elements), (char*) ((*argv)+1),
(*argc-1)*sizeof(char*));
res[args.elements+ *argc]=0; /* last null */
(*argc)+=args.elements;
*argv= (char**) res;
*(MEM_ROOT*) ptr= alloc; /* Save alloc root for free */
delete_dynamic(&args);
if (found_print_defaults)
{
int i;
printf("%s would have been started with the following arguments:\n",
**argv);
for (i=1 ; i < *argc ; i++)
printf("%s ", (*argv)[i]);
puts("");
exit(0);
}
DBUG_RETURN(error);
err:
fprintf(stderr,"Fatal error in defaults handling. Program aborted\n");
exit(1);
return 0; /* Keep compiler happy */
}
void free_defaults(char **argv)
{
MEM_ROOT ptr;
memcpy_fixed((char*) &ptr,(char *) argv - sizeof(ptr), sizeof(ptr));
free_root(&ptr,MYF(0));
}
static int search_default_file(Process_option_func opt_handler,
void *handler_ctx,
const char *dir,
const char *config_file)
{
char **ext;
const char *empty_list[]= { "", 0 };
my_bool have_ext= fn_ext(config_file)[0] != 0;
const char **exts_to_use= have_ext ? empty_list : f_extensions;
for (ext= (char**) exts_to_use; *ext; *ext++)
{
int error;
if ((error= search_default_file_with_ext(opt_handler, handler_ctx,
dir, *ext,
config_file, 0)) < 0)
return error;
}
return 0;
}
/*
Skip over keyword and get argument after keyword
SYNOPSIS
get_argument()
keyword Include directive keyword
kwlen Length of keyword
ptr Pointer to the keword in the line under process
line line number
RETURN
0 error
# Returns pointer to the argument after the keyword.
*/
static char *get_argument(const char *keyword, uint kwlen,
char *ptr, char *name, uint line)
{
char *end;
/* Skip over "include / includedir keyword" and following whitespace */
for (ptr+= kwlen - 1;
my_isspace(&my_charset_latin1, ptr[0]);
ptr++)
{}
/*
Trim trailing whitespace from directory name
The -1 below is for the newline added by fgets()
Note that my_isspace() is true for \r and \n
*/
for (end= ptr + strlen(ptr) - 1;
my_isspace(&my_charset_latin1, *(end - 1));
end--)
{}
end[0]= 0; /* Cut off end space */
/* Print error msg if there is nothing after !include* directive */
if (end <= ptr)
{
fprintf(stderr,
"error: Wrong '!%s' directive in config file: %s at line %d\n",
keyword, name, line);
return 0;
}
return ptr;
}
/*
Open a configuration file (if exists) and read given options from it
SYNOPSIS
search_default_file_with_ext()
opt_handler Option handler function. It is used to process
every separate option.
handler_ctx Pointer to the structure to store actual
parameters of the function.
dir directory to read
ext Extension for configuration file
config_file Name of configuration file
group groups to read
recursion_level the level of recursion, got while processing
"!include" or "!includedir"
RETURN
0 Success
-1 Fatal error, abort
1 File not found (Warning)
*/
static int search_default_file_with_ext(Process_option_func opt_handler,
void *handler_ctx,
const char *dir,
const char *ext,
const char *config_file,
int recursion_level)
{
char name[FN_REFLEN + 10], buff[4096], curr_gr[4096], *ptr, *end, **tmp_ext;
char *value, option[4096], tmp[FN_REFLEN];
static const char includedir_keyword[]= "includedir";
static const char include_keyword[]= "include";
const int max_recursion_level= 10;
FILE *fp;
uint line=0;
my_bool found_group=0;
uint i;
MY_DIR *search_dir;
FILEINFO *search_file;
if ((dir ? strlen(dir) : 0 )+strlen(config_file) >= FN_REFLEN-3)
return 0; /* Ignore wrong paths */
if (dir)
{
end=convert_dirname(name, dir, NullS);
if (dir[0] == FN_HOMELIB) /* Add . to filenames in home */
*end++='.';
strxmov(end,config_file,ext,NullS);
}
else
{
strmov(name,config_file);
}
fn_format(name,name,"","",4);
#if !defined(__WIN__) && !defined(OS2) && !defined(__NETWARE__)
{
MY_STAT stat_info;
if (!my_stat(name,&stat_info,MYF(0)))
return 1;
/*
Ignore world-writable regular files.
This is mainly done to protect us to not read a file created by
the mysqld server, but the check is still valid in most context.
*/
if ((stat_info.st_mode & S_IWOTH) &&
(stat_info.st_mode & S_IFMT) == S_IFREG)
{
fprintf(stderr, "Warning: World-writable config file '%s' is ignored\n",
name);
return 0;
}
}
#endif
if (!(fp= my_fopen(name, O_RDONLY, MYF(0))))
return 1; /* Ignore wrong files */
while (fgets(buff, sizeof(buff) - 1, fp))
{
line++;
/* Ignore comment and empty lines */
for (ptr= buff; my_isspace(&my_charset_latin1, *ptr); ptr++)
{}
if (*ptr == '#' || *ptr == ';' || !*ptr)
continue;
/* Configuration File Directives */
if ((*ptr == '!'))
{
if (recursion_level >= max_recursion_level)
{
for (end= ptr + strlen(ptr) - 1;
my_isspace(&my_charset_latin1, *(end - 1));
end--)
{}
end[0]= 0;
fprintf(stderr,
"Warning: skipping '%s' directive as maximum include"
"recursion level was reached in file %s at line %d\n",
ptr, name, line);
continue;
}
/* skip over `!' and following whitespace */
for (++ptr; my_isspace(&my_charset_latin1, ptr[0]); ptr++)
{}
if ((!strncmp(ptr, includedir_keyword,
sizeof(includedir_keyword) - 1)) &&
my_isspace(&my_charset_latin1, ptr[sizeof(includedir_keyword) - 1]))
{
if (!(ptr= get_argument(includedir_keyword,
sizeof(includedir_keyword),
ptr, name, line)))
goto err;
if (!(search_dir= my_dir(ptr, MYF(MY_WME))))
goto err;
for (i= 0; i < (uint) search_dir->number_off_files; i++)
{
search_file= search_dir->dir_entry + i;
ext= fn_ext(search_file->name);
/* check extension */
for (tmp_ext= (char**) f_extensions; *tmp_ext; *tmp_ext++)
{
if (!strcmp(ext, *tmp_ext))
break;
}
if (*tmp_ext)
{
fn_format(tmp, search_file->name, ptr, "",
MY_UNPACK_FILENAME | MY_SAFE_PATH);
search_default_file_with_ext(opt_handler, handler_ctx, "", "", tmp,
recursion_level + 1);
}
}
my_dirend(search_dir);
}
else if ((!strncmp(ptr, include_keyword, sizeof(include_keyword) - 1)) &&
my_isspace(&my_charset_latin1, ptr[sizeof(include_keyword)-1]))
{
if (!(ptr= get_argument(include_keyword,
sizeof(include_keyword), ptr,
name, line)))
goto err;
search_default_file_with_ext(opt_handler, handler_ctx, "", "", ptr,
recursion_level + 1);
}
continue;
}
if (*ptr == '[') /* Group name */
{
found_group=1;
if (!(end=(char *) strchr(++ptr,']')))
{
fprintf(stderr,
"error: Wrong group definition in config file: %s at line %d\n",
name,line);
goto err;
}
for ( ; my_isspace(&my_charset_latin1,end[-1]) ; end--) ;/* Remove end space */
end[0]=0;
strnmov(curr_gr, ptr, min((uint) (end-ptr)+1, 4096));
continue;
}
if (!found_group)
{
fprintf(stderr,
"error: Found option without preceding group in config file: %s at line: %d\n",
name,line);
goto err;
}
end= remove_end_comment(ptr);
if ((value= strchr(ptr, '=')))
end= value; /* Option without argument */
for ( ; my_isspace(&my_charset_latin1,end[-1]) ; end--) ;
if (!value)
{
strmake(strmov(option,"--"),ptr,(uint) (end-ptr));
if (opt_handler(handler_ctx, curr_gr, option))
goto err;
}
else
{
/* Remove pre- and end space */
char *value_end;
for (value++ ; my_isspace(&my_charset_latin1,*value); value++) ;
value_end=strend(value);
/*
We don't have to test for value_end >= value as we know there is
an '=' before
*/
for ( ; my_isspace(&my_charset_latin1,value_end[-1]) ; value_end--) ;
if (value_end < value) /* Empty string */
value_end=value;
/* remove quotes around argument */
if ((*value == '\"' || *value == '\'') && *value == value_end[-1])
{
value++;
value_end--;
}
ptr=strnmov(strmov(option,"--"),ptr,(uint) (end-ptr));
*ptr++= '=';
for ( ; value != value_end; value++)
{
if (*value == '\\' && value != value_end-1)
{
switch(*++value) {
case 'n':
*ptr++='\n';
break;
case 't':
*ptr++= '\t';
break;
case 'r':
*ptr++ = '\r';
break;
case 'b':
*ptr++ = '\b';
break;
case 's':
*ptr++= ' '; /* space */
break;
case '\"':
*ptr++= '\"';
break;
case '\'':
*ptr++= '\'';
break;
case '\\':
*ptr++= '\\';
break;
default: /* Unknown; Keep '\' */
*ptr++= '\\';
*ptr++= *value;
break;
}
}
else
*ptr++= *value;
}
*ptr=0;
if (opt_handler(handler_ctx, curr_gr, option))
goto err;
}
}
my_fclose(fp,MYF(0));
return(0);
err:
my_fclose(fp,MYF(0));
return -1; /* Fatal error */
}
static char *remove_end_comment(char *ptr)
{
char quote= 0; /* we are inside quote marks */
char escape= 0; /* symbol is protected by escape chagacter */
for (; *ptr; ptr++)
{
if ((*ptr == '\'' || *ptr == '\"') && !escape)
{
if (!quote)
quote= *ptr;
else if (quote == *ptr)
quote= 0;
}
/* We are not inside a string */
if (!quote && *ptr == '#')
{
*ptr= 0;
return ptr;
}
escape= (quote && *ptr == '\\' && !escape);
}
return ptr;
}
#include <help_start.h>
void my_print_default_files(const char *conf_file)
{
const char *empty_list[]= { "", 0 };
my_bool have_ext= fn_ext(conf_file)[0] != 0;
const char **exts_to_use= have_ext ? empty_list : f_extensions;
char name[FN_REFLEN], **ext;
const char **dirs;
init_default_directories();
puts("\nDefault options are read from the following files in the given order:");
if (dirname_length(conf_file))
fputs(conf_file,stdout);
else
{
for (dirs=default_directories ; *dirs; dirs++)
{
for (ext= (char**) exts_to_use; *ext; *ext++)
{
const char *pos;
char *end;
if (**dirs)
pos= *dirs;
else if (defaults_extra_file)
pos= defaults_extra_file;
else
continue;
end= convert_dirname(name, pos, NullS);
if (name[0] == FN_HOMELIB) /* Add . to filenames in home */
*end++='.';
strxmov(end, conf_file, *ext, " ", NullS);
fputs(name,stdout);
}
}
puts("");
}
}
void print_defaults(const char *conf_file, const char **groups)
{
const char **groups_save= groups;
my_print_default_files(conf_file);
fputs("The following groups are read:",stdout);
for ( ; *groups ; groups++)
{
fputc(' ',stdout);
fputs(*groups,stdout);
}
if (defaults_group_suffix)
{
groups= groups_save;
for ( ; *groups ; groups++)
{
fputc(' ',stdout);
fputs(*groups,stdout);
fputs(defaults_group_suffix,stdout);
}
}
puts("\nThe following options may be given as the first argument:\n\
--print-defaults Print the program argument list and exit\n\
--no-defaults Don't read default options from any options file\n\
--defaults-file=# Only read default options from the given file #\n\
--defaults-extra-file=# Read this file after the global files are read");
}
#include <help_end.h>
#ifdef __WIN__
/*
This wrapper for GetSystemWindowsDirectory() will dynamically bind to the
function if it is available, emulate it on NT4 Terminal Server by stripping
the \SYSTEM32 from the end of the results of GetSystemDirectory(), or just
return GetSystemDirectory().
*/
typedef UINT (WINAPI *GET_SYSTEM_WINDOWS_DIRECTORY)(LPSTR, UINT);
static uint my_get_system_windows_directory(char *buffer, uint size)
{
uint count;
GET_SYSTEM_WINDOWS_DIRECTORY
func_ptr= (GET_SYSTEM_WINDOWS_DIRECTORY)
GetProcAddress(GetModuleHandle("kernel32.dll"),
"GetSystemWindowsDirectoryA");
if (func_ptr)
return func_ptr(buffer, size);
/*
Windows NT 4.0 Terminal Server Edition:
To retrieve the shared Windows directory, call GetSystemDirectory and
trim the "System32" element from the end of the returned path.
*/
count= GetSystemDirectory(buffer, size);
if (count > 8 && stricmp(buffer+(count-8), "\\System32") == 0)
{
count-= 8;
buffer[count] = '\0';
}
return count;
}
#endif
/*
Create the list of default directories.
On Microsoft Windows, this is:
1. C:/
2. GetWindowsDirectory()
3. GetSystemWindowsDirectory()
4. getenv(DEFAULT_HOME_ENV)
5. Directory above where the executable is located
6. ""
On Novell NetWare, this is:
1. sys:/etc/
2. getenv(DEFAULT_HOME_ENV)
3. ""
On OS/2, this is:
1. getenv(ETC)
2. /etc/
3. getenv(DEFAULT_HOME_ENV)
4. ""
5. "~/"
Everywhere else, this is:
1. /etc/
2. getenv(DEFAULT_HOME_ENV)
3. ""
4. "~/"
*/
static void init_default_directories()
{
const char *env, **ptr= default_directories;
#ifdef __WIN__
*ptr++= "C:/";
if (GetWindowsDirectory(system_dir,sizeof(system_dir)))
*ptr++= (char*)&system_dir;
if (my_get_system_windows_directory(shared_system_dir,
sizeof(shared_system_dir)) &&
strcmp(system_dir, shared_system_dir))
*ptr++= (char *)&shared_system_dir;
#elif defined(__NETWARE__)
*ptr++= "sys:/etc/";
#else
#if defined(__EMX__) || defined(OS2)
if ((env= getenv("ETC")))
*ptr++= env;
#endif
*ptr++= "/etc/";
#endif
if ((env= getenv(STRINGIFY_ARG(DEFAULT_HOME_ENV))))
*ptr++= env;
*ptr++= ""; /* Place for defaults_extra_file */
#if !defined(__WIN__) && !defined(__NETWARE__)
*ptr++= "~/";;
#elif defined(__WIN__)
if (GetModuleFileName(NULL, config_dir, sizeof(config_dir)))
{
char *last= NULL, *end= strend(config_dir);
/*
Look for the second-to-last \ in the filename, but hang on
to a pointer after the last \ in case we're in the root of
a drive.
*/
for ( ; end > config_dir; end--)
{
if (*end == FN_LIBCHAR)
{
if (last)
{
if (end != config_dir)
{
/* Keep the last '\' as this works both with D:\ and a directory */
end[1]= 0;
}
else
{
/* No parent directory (strange). Use current dir + '\' */
last[1]= 0;
}
break;
}
last= end;
}
}
*ptr++= (char *)&config_dir;
}
#endif
*ptr= 0; /* end marker */
}
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