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/* Deal with the X Resource Manager.
Copyright (C) 1990, 1992, 1993 Free Software Foundation.
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, 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; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Coopted for oleo -t 12/92 */
/* Written by jla, 4/90 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef X_DISPLAY_MISSING
#ifndef alloca
#ifdef __GNUC__
#define alloca __builtin_alloca
#else /* __GNUC__ not defined. */
#if HAVE_ALLOCA_H
#include <alloca.h>
#else /* not HAVE_ALLOCA_H */
#if defined (MSDOS) && !defined (__TURBOC__)
#include <malloc.h>
#else /* not MSDOS, or __TURBOC__ */
#if defined(_AIX)
#include <malloc.h>
#pragma alloca
#endif /* not _AIX */
#endif /* not MSDOS, or __TURBOC__ */
#endif /* not HAVE_ALLOCA_H */
#endif /* __GNUC__ not defined. */
#endif /* alloca not defined. */
#include <stdio.h>
#include "sysdef.h"
#if HAVE_SYS_SYSTEMINFO_H
#include <sys/systeminfo.h>
#endif
/* This should be included before the X include files; otherwise, we get
warnings about redefining NULL under BSD 4.3. */
#include <sys/param.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/Xresource.h>
#ifdef VMS
#include "vms-pwd.h"
#else
#include <pwd.h>
#endif
/*
* Already included <sys/stat.h> via sysdef.h
*/
#if !defined(S_ISDIR) && defined(S_IFDIR)
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
#ifndef MAXPATHLEN
#define MAXPATHLEN 256
#endif
extern char *getenv (const char *);
#ifndef __sgi
extern struct passwd *getpwuid (uid_t);
#endif /* !__sgi */
static char *
gethomedir (char *dirname)
{
int uid;
struct passwd *pw;
char *ptr;
if ((ptr = getenv ("HOME")) == NULL)
{
if ((ptr = getenv ("USER")) != NULL)
pw = getpwnam (ptr);
else
{
uid = getuid ();
pw = getpwuid (uid);
}
if (pw)
ptr = pw->pw_dir;
else
{
ptr = NULL;
*dirname = '\0';
}
}
if (ptr != NULL)
strcpy (dirname, ptr);
dirname += strlen (dirname);
*dirname = '/';
dirname++;
*dirname = '\0';
return dirname;
}
static int
file_p (char *path)
{
struct stat status;
return (access (path, 4) == 0 /* exists and is readable */
&& stat (path, &status) == 0 /* get the status */
&& !S_ISDIR(status.st_mode));
}
/* Isn't this just disgusting? */
#define X_DEFAULT_SEARCH_PATH "/usr/lib/X11/%L/%T/%N%S:/usr/lib/X11/%l/%T/%N%S:/usr/lib/X11/%T/%N%S"
static int
decode_magic (char *string, char *file, char *return_path)
{
char *p = string;
char *t = return_path;
while (*p)
{
if (*p == '%')
switch (*++p)
{
case '%':
*t++ = '%';
p++;
break;
case 'N':
case 'T':
case 'S':
case 'L':
case 'l':
case 't':
case 'c':
default:
p++;
if (*t == '/' && *p == '/')
p++;
break;
}
else
*t++ = *p++;
}
*t = '\0';
strcat (return_path, file);
if (file_p (return_path))
return 1;
return_path[0] = '\0';
return 0;
}
static int
magic_searchpath_decoder (char *incantation_string, char *file, char *return_path)
{
register char *s = incantation_string;
register char *p;
/* Must be big enough for "%N%S". */
register int string_size = MAXPATHLEN;
register char *string = (char *) alloca (string_size * sizeof (*string));
while (*s)
{
p = s;
while (*p && *p != ':')
p++;
if (p == s)
{
/* We know string is big enough for this. */
bcopy ("%N%S", string, 5);
if (decode_magic (string, file, return_path))
return 1;
}
else
{
int len = p - s;
if (string_size < len+1)
{
string_size = 2 * len;
string = (char *) alloca (string_size * sizeof (*string));
}
bcopy (s, string, len);
string[len + 1] = '\0';
if (decode_magic (string, file, return_path))
return 1;
}
if (*p)
s = p + 1;
else
return 0;
}
return 0;
}
static XrmDatabase
get_system_app (char *class)
{
XrmDatabase db;
char path[MAXPATHLEN];
char *p;
if ((p = getenv ("XFILESEARCHPATH")) == NULL)
p = X_DEFAULT_SEARCH_PATH;
if (! magic_searchpath_decoder (p, class, path))
return NULL;
db = XrmGetFileDatabase (path);
return db;
}
static XrmDatabase
get_fallback (Display *display)
{
return NULL;
}
static XrmDatabase
get_user_app (char *class)
{
XrmDatabase db;
char *magic_path;
char path[MAXPATHLEN];
if ((magic_path = getenv ("XUSERFILESEARCHPATH")) == NULL)
{
char homedir[MAXPATHLEN];
char *default_magic;
char *p;
gethomedir (homedir);
if ((p = getenv ("XAPPLRESDIR")) == NULL)
{
default_magic = "%s/%%L/%%N:%s/%%l/%%N:%s/%%N";
magic_path = (char *) alloca ((3 * strlen (homedir))
+ strlen (default_magic));
sprintf (magic_path, default_magic, homedir, homedir, homedir);
}
else
{
default_magic = "%s/%%L/%%N:%s/%%l/%%N:%s/%%N:%s/%%N";
magic_path = (char *) alloca ((3 * strlen (p))
+ strlen (default_magic)
+ strlen (homedir));
sprintf (magic_path, default_magic, p, p, p, homedir);
}
}
if (! magic_searchpath_decoder (magic_path, class, path))
return NULL;
db = XrmGetFileDatabase (path);
return db;
}
static XrmDatabase
get_user_db (Display *display)
{
XrmDatabase db;
char *xdefs;
#ifdef HAVE_XRESOURCEMANAGERSTRING
xdefs = XResourceManagerString (display);
#else
xdefs = display->xdefaults;
#endif
if (xdefs != NULL)
db = XrmGetStringDatabase (xdefs);
else
{
char xdefault[MAXPATHLEN];
gethomedir (xdefault);
strcat (xdefault, ".Xdefaults");
db = XrmGetFileDatabase (xdefault);
}
return db;
}
static XrmDatabase
get_environ_db (void)
{
XrmDatabase db;
char *p;
char path[MAXPATHLEN];
if ((p = getenv ("XENVIRONMENT")) == NULL)
{
gethomedir (path);
strcat (path, ".Xdefaults-");
#if defined(HAVE_SYSINFO) && defined(HAVE_SYS_SYSTEMINFO_H)
sysinfo (SI_HOSTNAME, path + strlen (path), MAXPATHLEN - strlen (path));
#else
gethostname (path + strlen (path), MAXPATHLEN - strlen (path));
#endif
p = path;
}
db = XrmGetFileDatabase (p);
return db;
}
/* Types of values that we can find in a database */
#define XrmStringType "String" /* String representation */
XrmRepresentation x_rm_string = 0; /* Quark representation */
/* Load X resources based on the display and a possible -xrm option. */
XrmDatabase
x_load_resources (Display *display, char *xrm_string, char *myclass)
{
XrmDatabase rdb;
XrmDatabase db;
if (!x_rm_string)
x_rm_string = XrmStringToQuark (XrmStringType);
XrmInitialize ();
rdb = XrmGetStringDatabase ("");
/* Get application system defaults */
db = get_system_app (myclass);
if (db != NULL)
XrmMergeDatabases (db, &rdb);
/* Get Fallback resources */
db = get_fallback (display);
if (db != NULL)
XrmMergeDatabases (db, &rdb);
/* Get application user defaults */
db = get_user_app (myclass);
if (db != NULL)
XrmMergeDatabases (db, &rdb);
/* get User defaults */
db = get_user_db (display);
if (db != NULL)
XrmMergeDatabases (db, &rdb);
/* Get Environment defaults. */
db = get_environ_db ();
if (db != NULL)
XrmMergeDatabases (db, &rdb);
/* Last, merge in any specification from the command line. */
if (xrm_string != NULL)
{
db = XrmGetStringDatabase (xrm_string);
if (db != NULL)
XrmMergeDatabases (db, &rdb);
}
return rdb;
}
/* Retrieve the value of the resource specified by NAME with class CLASS
and of type TYPE from database RDB. The value is returned in RET_VALUE. */
int
x_get_resource (XrmDatabase rdb, char *name, char *class, XrmRepresentation expected_type, XrmValue *ret_value)
{
XrmValue value;
XrmName namelist[100];
XrmClass classlist[100];
XrmRepresentation type;
XrmStringToNameList(name, namelist);
XrmStringToClassList(class, classlist);
if (XrmQGetResource (rdb, namelist, classlist, &type, &value) == True
&& (type == expected_type))
{
if (type == x_rm_string)
ret_value->addr = (char *) value.addr;
else
bcopy (value.addr, ret_value->addr, ret_value->size);
return value.size;
}
return 0;
}
/* Retrieve the string resource specified by NAME with CLASS from
database RDB. */
char *
x_get_string_resource (XrmDatabase rdb, char *class, char *name)
{
XrmValue value;
if (!x_rm_string)
x_rm_string = XrmStringToQuark (XrmStringType);
if (x_get_resource (rdb, name, class, x_rm_string, &value))
return (char *) value.addr;
return (char *) 0;
}
#ifdef TESTRM
#include <stdio.h>
#include "arg-list.h"
static void
fatal (msg, prog, x1, x2, x3, x4, x5)
char *msg, *prog;
int x1, x2, x3, x4, x5;
{
extern int errno;
if (errno)
perror (prog);
(void) fprintf (stderr, msg, prog, x1, x2, x3, x4, x5);
exit (1);
}
main (argc, argv)
int argc;
char **argv;
{
Display *display;
char *displayname, *resource_string, *class;
XrmDatabase xdb;
List *arg_list, *lp;
arg_list = arg_listify (argc, argv);
lp = member ("-d", arg_list);
if (!NIL (lp))
displayname = car (cdr (lp));
else
displayname = "localhost:0.0";
lp = member ("-xrm", arg_list);
if (! NIL (lp))
resource_string = car (cdr (lp));
else
resource_string = (char *) 0;
lp = member ("-c", arg_list);
if (! NIL (lp))
class = car (cdr (lp));
else
class = "Emacs";
free_arglist (arg_list);
if (!(display = XOpenDisplay (displayname)))
fatal ("Can't open display '%s'\n", XDisplayName (displayname));
xdb = x_load_resources (display, resource_string, class);
#if 0
/* In a real program, you'd want to also do this: */
display->db = xdb;
#endif
while (1)
{
char line[90];
printf ("String: ");
gets (line);
if (strlen (line))
{
char *value = x_get_string_resource (xdb, line, class);
if (value != NULL)
printf ("\t%s: %s\n\n", line, value);
else
printf ("\tNo Value.\n\n");
}
else
break;
}
printf ("\tExit.\n\n");
XCloseDisplay (display);
}
#endif /* TESTRM */
#endif /* X_DISPLAY_MISSING */
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