diff options
Diffstat (limited to 'hw/xfree86/parser/write.c')
| -rw-r--r-- | hw/xfree86/parser/write.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/hw/xfree86/parser/write.c b/hw/xfree86/parser/write.c new file mode 100644 index 000000000..1d7472a5c --- /dev/null +++ b/hw/xfree86/parser/write.c @@ -0,0 +1,187 @@ +/* $XFree86: xc/programs/Xserver/hw/xfree86/parser/write.c,v 1.17 2002/09/17 18:54:16 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. + * + */ + +/* 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); + + 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 */ |