217 lines
6.1 KiB
C
217 lines
6.1 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/parser/write.c,v 1.18 2003/08/24 17:37:08 dawes Exp $ */
|
|
/*
|
|
*
|
|
* Copyright (c) 1997 Metro Link Incorporated
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* 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 X CONSORTIUM 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 Metro Link shall not be
|
|
* used in advertising or otherwise to promote the sale, use or other dealings
|
|
* in this Software without prior written authorization from Metro Link.
|
|
*
|
|
*/
|
|
/*
|
|
* Copyright (c) 1997-2003 by The XFree86 Project, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 copyright holder(s)
|
|
* and author(s) 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 copyright holder(s) and author(s).
|
|
*/
|
|
|
|
|
|
/* View/edit this file with tab stops set to 4 */
|
|
|
|
#include "xf86Parser.h"
|
|
#include "xf86tokens.h"
|
|
#include "Configint.h"
|
|
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
|
|
#if ((defined(sun) && !defined(SVR4)) || defined(macII)) && !defined(__GLIBC__)
|
|
#ifndef strerror
|
|
extern char *sys_errlist[];
|
|
extern int sys_nerr;
|
|
#define strerror(n) \
|
|
(((n) >= 0 && (n) < sys_nerr) ? sys_errlist[n] : "unknown error")
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(SVR4) || defined(__linux__) || defined(CSRG_BASED)
|
|
#define HAS_SAVED_IDS_AND_SETEUID
|
|
#endif
|
|
#if defined(__UNIXOS2__) || defined(WIN32)
|
|
#define HAS_NO_UIDS
|
|
#endif
|
|
|
|
#ifdef HAS_NO_UIDS
|
|
#define doWriteConfigFile xf86writeConfigFile
|
|
#define Local /**/
|
|
#else
|
|
#define Local static
|
|
#endif
|
|
|
|
Local int
|
|
doWriteConfigFile (const char *filename, XF86ConfigPtr cptr)
|
|
{
|
|
FILE *cf;
|
|
|
|
if ((cf = fopen (filename, "w")) == NULL)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
if (cptr->conf_comment)
|
|
fprintf (cf, "%s\n", cptr->conf_comment);
|
|
|
|
xf86printLayoutSection (cf, cptr->conf_layout_lst);
|
|
|
|
fprintf (cf, "Section \"Files\"\n");
|
|
xf86printFileSection (cf, cptr->conf_files);
|
|
fprintf (cf, "EndSection\n\n");
|
|
|
|
fprintf (cf, "Section \"Module\"\n");
|
|
xf86printModuleSection (cf, cptr->conf_modules);
|
|
fprintf (cf, "EndSection\n\n");
|
|
|
|
xf86printVendorSection (cf, cptr->conf_vendor_lst);
|
|
|
|
xf86printServerFlagsSection (cf, cptr->conf_flags);
|
|
|
|
xf86printInputSection (cf, cptr->conf_input_lst);
|
|
|
|
xf86printVideoAdaptorSection (cf, cptr->conf_videoadaptor_lst);
|
|
|
|
xf86printModesSection (cf, cptr->conf_modes_lst);
|
|
|
|
xf86printMonitorSection (cf, cptr->conf_monitor_lst);
|
|
|
|
xf86printDeviceSection (cf, cptr->conf_device_lst);
|
|
|
|
xf86printScreenSection (cf, cptr->conf_screen_lst);
|
|
|
|
xf86printDRISection (cf, cptr->conf_dri);
|
|
|
|
xf86printExtensionsSection (cf, cptr->conf_extensions);
|
|
|
|
fclose(cf);
|
|
return 1;
|
|
}
|
|
|
|
#ifndef HAS_NO_UIDS
|
|
|
|
int
|
|
xf86writeConfigFile (const char *filename, XF86ConfigPtr cptr)
|
|
{
|
|
int ret;
|
|
|
|
#if !defined(HAS_SAVED_IDS_AND_SETEUID)
|
|
int pid, p;
|
|
int status;
|
|
void (*csig)(int);
|
|
#else
|
|
int ruid, euid;
|
|
#endif
|
|
|
|
if (getuid() != geteuid())
|
|
{
|
|
|
|
#if !defined(HAS_SAVED_IDS_AND_SETEUID)
|
|
/* Need to fork to change ruid without loosing euid */
|
|
#ifdef SIGCHLD
|
|
csig = signal(SIGCHLD, SIG_DFL);
|
|
#endif
|
|
switch ((pid = fork()))
|
|
{
|
|
case -1:
|
|
ErrorF("xf86writeConfigFile(): fork failed (%s)\n",
|
|
strerror(errno));
|
|
return 0;
|
|
case 0: /* child */
|
|
setuid(getuid());
|
|
ret = doWriteConfigFile(filename, cptr);
|
|
exit(ret);
|
|
break;
|
|
default: /* parent */
|
|
do
|
|
{
|
|
p = waitpid(pid, &status, 0);
|
|
} while (p == -1 && errno == EINTR);
|
|
}
|
|
#ifdef SIGCHLD
|
|
signal(SIGCHLD, csig);
|
|
#endif
|
|
if (p != -1 && WIFEXITED(status) && WEXITSTATUS(status) == 0)
|
|
return 1; /* success */
|
|
else
|
|
return 0;
|
|
|
|
#else /* HAS_SAVED_IDS_AND_SETEUID */
|
|
|
|
ruid = getuid();
|
|
euid = geteuid();
|
|
|
|
if (seteuid(ruid) == -1)
|
|
{
|
|
ErrorF("xf86writeConfigFile(): seteuid(%d) failed (%s)\n",
|
|
ruid, strerror(errno));
|
|
return 0;
|
|
}
|
|
ret = doWriteConfigFile(filename, cptr);
|
|
|
|
if (seteuid(euid) == -1)
|
|
{
|
|
ErrorF("xf86writeConfigFile(): seteuid(%d) failed (%s)\n",
|
|
euid, strerror(errno));
|
|
}
|
|
return ret;
|
|
|
|
#endif /* HAS_SAVED_IDS_AND_SETEUID */
|
|
|
|
}
|
|
else
|
|
{
|
|
return doWriteConfigFile(filename, cptr);
|
|
}
|
|
}
|
|
|
|
#endif /* !HAS_NO_UIDS */
|