205 lines
6.4 KiB
C
205 lines
6.4 KiB
C
/*
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* Copyright (c) 1997 Metro Link Incorporated
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of the Metro Link shall not be
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* used in advertising or otherwise to promote the sale, use or other dealings
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* in this Software without prior written authorization from Metro Link.
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*
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*/
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/*
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* Copyright (c) 1997-2003 by The XFree86 Project, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the copyright holder(s)
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* and author(s) shall not be used in advertising or otherwise to promote
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* the sale, use or other dealings in this Software without prior written
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* authorization from the copyright holder(s) and author(s).
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include "os.h"
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#include "xf86Parser.h"
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#include "xf86tokens.h"
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#include "Configint.h"
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <errno.h>
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#if defined(HAVE_SETEUID) && defined(_POSIX_SAVED_IDS) && _POSIX_SAVED_IDS > 0
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#define HAS_SAVED_IDS_AND_SETEUID
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#endif
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#if defined(WIN32)
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#define HAS_NO_UIDS
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#endif
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#ifdef HAS_NO_UIDS
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#define doWriteConfigFile xf86writeConfigFile
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#define Local /**/
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#else
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#define Local static
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#endif
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Local int
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doWriteConfigFile(const char *filename, XF86ConfigPtr cptr)
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{
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FILE *cf;
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if ((cf = fopen(filename, "w")) == NULL) {
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return 0;
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}
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if (cptr->conf_comment)
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fprintf(cf, "%s\n", cptr->conf_comment);
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xf86printLayoutSection(cf, cptr->conf_layout_lst);
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if (cptr->conf_files != NULL) {
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fprintf(cf, "Section \"Files\"\n");
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xf86printFileSection(cf, cptr->conf_files);
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fprintf(cf, "EndSection\n\n");
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}
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if (cptr->conf_modules != NULL) {
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fprintf(cf, "Section \"Module\"\n");
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xf86printModuleSection(cf, cptr->conf_modules);
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fprintf(cf, "EndSection\n\n");
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}
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xf86printVendorSection(cf, cptr->conf_vendor_lst);
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xf86printServerFlagsSection(cf, cptr->conf_flags);
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xf86printInputSection(cf, cptr->conf_input_lst);
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xf86printInputClassSection(cf, cptr->conf_inputclass_lst);
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xf86printVideoAdaptorSection(cf, cptr->conf_videoadaptor_lst);
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xf86printModesSection(cf, cptr->conf_modes_lst);
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xf86printMonitorSection(cf, cptr->conf_monitor_lst);
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xf86printDeviceSection(cf, cptr->conf_device_lst);
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xf86printScreenSection(cf, cptr->conf_screen_lst);
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xf86printDRISection(cf, cptr->conf_dri);
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xf86printExtensionsSection(cf, cptr->conf_extensions);
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fclose(cf);
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return 1;
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}
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#ifndef HAS_NO_UIDS
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int
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xf86writeConfigFile(const char *filename, XF86ConfigPtr cptr)
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{
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int ret;
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#if !defined(HAS_SAVED_IDS_AND_SETEUID)
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int pid, p;
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int status;
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void (*csig) (int);
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#else
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int ruid, euid;
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#endif
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if (getuid() != geteuid()) {
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#if !defined(HAS_SAVED_IDS_AND_SETEUID)
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/* Need to fork to change ruid without loosing euid */
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csig = signal(SIGCHLD, SIG_DFL);
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switch ((pid = fork())) {
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case -1:
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ErrorF("xf86writeConfigFile(): fork failed (%s)\n",
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strerror(errno));
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return 0;
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case 0: /* child */
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if (setuid(getuid()) == -1)
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FatalError("xf86writeConfigFile(): "
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"setuid failed(%s)\n", strerror(errno));
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ret = doWriteConfigFile(filename, cptr);
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exit(ret);
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break;
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default: /* parent */
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do {
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p = waitpid(pid, &status, 0);
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} while (p == -1 && errno == EINTR);
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}
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signal(SIGCHLD, csig);
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if (p != -1 && WIFEXITED(status) && WEXITSTATUS(status) == 0)
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return 1; /* success */
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else
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return 0;
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#else /* HAS_SAVED_IDS_AND_SETEUID */
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ruid = getuid();
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euid = geteuid();
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if (seteuid(ruid) == -1) {
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ErrorF("xf86writeConfigFile(): seteuid(%d) failed (%s)\n",
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ruid, strerror(errno));
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return 0;
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}
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ret = doWriteConfigFile(filename, cptr);
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if (seteuid(euid) == -1) {
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ErrorF("xf86writeConfigFile(): seteuid(%d) failed (%s)\n",
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euid, strerror(errno));
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}
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return ret;
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#endif /* HAS_SAVED_IDS_AND_SETEUID */
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}
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else {
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return doWriteConfigFile(filename, cptr);
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}
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}
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#endif /* !HAS_NO_UIDS */
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