ref: b76e8ecc732cb311ceee6fd6c807b7e784d3fe31
dir: /sys/src/ape/X11/lib/ICE/authutil.c/
/* $Xorg: authutil.c,v 1.5 2001/02/09 02:03:26 xorgcvs Exp $ */
/* $XdotOrg: xc/lib/ICE/authutil.c,v 1.3 2005/05/17 20:53:55 sandmann Exp $ */
/******************************************************************************
Copyright 1993, 1998 The Open Group
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
Author: Ralph Mor, X Consortium
******************************************************************************/
/* $XFree86: authutil.c,v 3.9 2002/05/31 18:45:41 dawes Exp $ */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <X11/ICE/ICElib.h>
#include "ICElibint.h"
#include <X11/ICE/ICEutil.h>
#include <X11/Xos.h>
#include <sys/stat.h>
#include <errno.h>
#include <time.h>
#define Time_t time_t
#ifdef __UNIXOS2__
extern char* getenv(const char*);
#define link rename
#endif
#ifndef X_NOT_POSIX
#include <unistd.h>
#else
#ifndef WIN32
extern unsigned sleep ();
#else
#define link rename
#endif
#endif
static Status read_short (FILE *file, unsigned short *shortp);
static Status read_string (FILE *file, char **stringp);
static Status read_counted_string (FILE *file, unsigned short *countp, char **stringp);
static Status write_short (FILE *file, unsigned short s);
static Status write_string (FILE *file, char *string);
static Status write_counted_string (FILE *file, unsigned short count, char *string);
/*
* The following routines are for manipulating the .ICEauthority file
* These are utility functions - they are not part of the standard
* ICE library specification.
*/
char *
IceAuthFileName (void)
{
static char slashDotICEauthority[] = "/.ICEauthority";
char *name;
static char *buf;
static int bsize;
int size;
#if defined(WIN32) || defined(__UNIXOS2__)
#ifndef PATH_MAX
#define PATH_MAX 512
#endif
char dir[PATH_MAX];
#endif
if ((name = getenv ("ICEAUTHORITY")))
return (name);
name = getenv ("HOME");
if (!name)
{
#ifdef WIN32
register char *ptr1;
register char *ptr2;
int len1 = 0, len2 = 0;
if ((ptr1 = getenv("HOMEDRIVE")) && (ptr2 = getenv("HOMEDIR"))) {
len1 = strlen (ptr1);
len2 = strlen (ptr2);
} else if (ptr2 = getenv("USERNAME")) {
len1 = strlen (ptr1 = "/users/");
len2 = strlen (ptr2);
}
if ((len1 + len2 + 1) < PATH_MAX) {
sprintf (dir, "%s%s", ptr1, (ptr2) ? ptr2 : "");
name = dir;
}
if (!name)
#endif
#ifdef __UNIXOS2__
strcpy (dir,"c:");
name = dir;
if (!name)
#endif
return (NULL);
}
size = strlen (name) + strlen (&slashDotICEauthority[1]) + 2;
if (size > bsize)
{
if (buf)
free (buf);
buf = malloc ((unsigned) size);
if (!buf)
return (NULL);
bsize = size;
}
strcpy (buf, name);
strcat (buf, slashDotICEauthority + (name[1] == '\0' ? 1 : 0));
return (buf);
}
int
IceLockAuthFile (file_name, retries, timeout, dead)
char *file_name;
int retries;
int timeout;
long dead;
{
char creat_name[1025], link_name[1025];
struct stat statb;
Time_t now;
int creat_fd = -1;
if ((int) strlen (file_name) > 1022)
return (IceAuthLockError);
strcpy (creat_name, file_name);
strcat (creat_name, "-c");
strcpy (link_name, file_name);
strcat (link_name, "-l");
if (stat (creat_name, &statb) != -1)
{
now = time ((Time_t *) 0);
/*
* NFS may cause ctime to be before now, special
* case a 0 deadtime to force lock removal
*/
if (dead == 0 || now - statb.st_ctime > dead)
{
unlink (creat_name);
unlink (link_name);
}
}
while (retries > 0)
{
if (creat_fd == -1)
{
creat_fd = creat (creat_name, 0666);
if (creat_fd == -1)
{
if (errno != EACCES)
return (IceAuthLockError);
}
else
close (creat_fd);
}
if (creat_fd != -1)
{
if (link (creat_name, link_name) != -1)
return (IceAuthLockSuccess);
if (errno == ENOENT)
{
creat_fd = -1; /* force re-creat next time around */
continue;
}
if (errno != EEXIST)
return (IceAuthLockError);
}
sleep ((unsigned) timeout);
--retries;
}
return (IceAuthLockTimeout);
}
void
IceUnlockAuthFile (file_name)
char *file_name;
{
#ifndef WIN32
char creat_name[1025];
#endif
char link_name[1025];
if ((int) strlen (file_name) > 1022)
return;
#ifndef WIN32
strcpy (creat_name, file_name);
strcat (creat_name, "-c");
#endif
strcpy (link_name, file_name);
strcat (link_name, "-l");
#ifndef WIN32
unlink (creat_name);
#endif
unlink (link_name);
}
IceAuthFileEntry *
IceReadAuthFileEntry (auth_file)
FILE *auth_file;
{
IceAuthFileEntry local;
IceAuthFileEntry *ret;
local.protocol_name = NULL;
local.protocol_data = NULL;
local.network_id = NULL;
local.auth_name = NULL;
local.auth_data = NULL;
if (!read_string (auth_file, &local.protocol_name))
return (NULL);
if (!read_counted_string (auth_file,
&local.protocol_data_length, &local.protocol_data))
goto bad;
if (!read_string (auth_file, &local.network_id))
goto bad;
if (!read_string (auth_file, &local.auth_name))
goto bad;
if (!read_counted_string (auth_file,
&local.auth_data_length, &local.auth_data))
goto bad;
if (!(ret = (IceAuthFileEntry *) malloc (sizeof (IceAuthFileEntry))))
goto bad;
*ret = local;
return (ret);
bad:
if (local.protocol_name) free (local.protocol_name);
if (local.protocol_data) free (local.protocol_data);
if (local.network_id) free (local.network_id);
if (local.auth_name) free (local.auth_name);
if (local.auth_data) free (local.auth_data);
return (NULL);
}
void
IceFreeAuthFileEntry (auth)
IceAuthFileEntry *auth;
{
if (auth)
{
if (auth->protocol_name) free (auth->protocol_name);
if (auth->protocol_data) free (auth->protocol_data);
if (auth->network_id) free (auth->network_id);
if (auth->auth_name) free (auth->auth_name);
if (auth->auth_data) free (auth->auth_data);
free ((char *) auth);
}
}
Status
IceWriteAuthFileEntry (auth_file, auth)
FILE *auth_file;
IceAuthFileEntry *auth;
{
if (!write_string (auth_file, auth->protocol_name))
return (0);
if (!write_counted_string (auth_file,
auth->protocol_data_length, auth->protocol_data))
return (0);
if (!write_string (auth_file, auth->network_id))
return (0);
if (!write_string (auth_file, auth->auth_name))
return (0);
if (!write_counted_string (auth_file,
auth->auth_data_length, auth->auth_data))
return (0);
return (1);
}
IceAuthFileEntry *
IceGetAuthFileEntry (protocol_name, network_id, auth_name)
char *protocol_name;
char *network_id;
char *auth_name;
{
FILE *auth_file;
char *filename;
IceAuthFileEntry *entry;
if (!(filename = IceAuthFileName ()))
return (NULL);
if (access (filename, R_OK) != 0) /* checks REAL id */
return (NULL);
if (!(auth_file = fopen (filename, "rb")))
return (NULL);
for (;;)
{
if (!(entry = IceReadAuthFileEntry (auth_file)))
break;
if (strcmp (protocol_name, entry->protocol_name) == 0 &&
strcmp (network_id, entry->network_id) == 0 &&
strcmp (auth_name, entry->auth_name) == 0)
{
break;
}
IceFreeAuthFileEntry (entry);
}
fclose (auth_file);
return (entry);
}
/*
* local routines
*/
static Status
read_short (FILE *file, unsigned short *shortp)
{
unsigned char file_short[2];
if (fread ((char *) file_short, (int) sizeof (file_short), 1, file) != 1)
return (0);
*shortp = file_short[0] * 256 + file_short[1];
return (1);
}
static Status
read_string (FILE *file, char **stringp)
{
unsigned short len;
char *data;
if (!read_short (file, &len))
return (0);
data = malloc ((unsigned) len + 1);
if (!data)
return (0);
if (len != 0)
{
if (fread (data, (int) sizeof (char), (int) len, file) != len)
{
free (data);
return (0);
}
}
data[len] = '\0';
*stringp = data;
return (1);
}
static Status
read_counted_string (FILE *file, unsigned short *countp, char **stringp)
{
unsigned short len;
char *data;
if (!read_short (file, &len))
return (0);
if (len == 0)
{
data = 0;
}
else
{
data = malloc ((unsigned) len);
if (!data)
return (0);
if (fread (data, (int) sizeof (char), (int) len, file) != len)
{
free (data);
return (0);
}
}
*stringp = data;
*countp = len;
return (1);
}
static Status
write_short (FILE *file, unsigned short s)
{
unsigned char file_short[2];
file_short[0] = (s & (unsigned) 0xff00) >> 8;
file_short[1] = s & 0xff;
if (fwrite ((char *) file_short, (int) sizeof (file_short), 1, file) != 1)
return (0);
return (1);
}
static Status
write_string (FILE *file, char *string)
{
unsigned short count = strlen (string);
if (!write_short (file, count))
return (0);
if (fwrite (string, (int) sizeof (char), (int) count, file) != count)
return (0);
return (1);
}
static Status
write_counted_string (FILE *file, unsigned short count, char *string)
{
if (!write_short (file, count))
return (0);
if (fwrite (string, (int) sizeof (char), (int) count, file) != count)
return (0);
return (1);
}