📄 env_unix.c
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/* ======================================================================== * Copyright 1988-2008 University of Washington * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * * ======================================================================== *//* * Program: UNIX environment routines * * Author: Mark Crispin * UW Technology * University of Washington * Seattle, WA 98195 * Internet: MRC@Washington.EDU * * Date: 1 August 1988 * Last Edited: 15 May 2008 */#include <grp.h>#include <signal.h>#include <sys/wait.h>/* in case stat.h is ancient */#ifndef S_IRUSR#define S_IRUSR S_IREAD#endif#ifndef S_IWUSR#define S_IWUSR S_IWRITE#endif#ifndef S_IXUSR#define S_IXUSR S_IEXEC#endif#ifndef S_IRGRP#define S_IRGRP (S_IREAD >> 3)#endif#ifndef S_IWGRP#define S_IWGRP (S_IWRITE >> 3)#endif#ifndef S_IXGRP#define S_IXGRP (S_IEXEC >> 3)#endif#ifndef S_IROTH#define S_IROTH (S_IREAD >> 6)#endif#ifndef S_IWOTH#define S_IWOTH (S_IWRITE >> 6)#endif#ifndef S_IXOTH#define S_IXOTH (S_IEXEC >> 6)#endif /* c-client environment parameters */static char *myUserName = NIL; /* user name */static char *myHomeDir = NIL; /* home directory name */static char *myServerName = NIL;/* server name */static char *myLocalHost = NIL; /* local host name */static char *myNewsrc = NIL; /* newsrc file name */static char *mailsubdir = NIL; /* mailbox subdirectory name */static char *sysInbox = NIL; /* system inbox name */static char *newsActive = NIL; /* news active file */static char *newsSpool = NIL; /* news spool */static char *blackBoxDir = NIL; /* black box directory name */ /* black box default home directory */static char *blackBoxDefaultHome = NIL;static char *sslCApath = NIL; /* non-standard CA path */static short anonymous = NIL; /* is anonymous */static short blackBox = NIL; /* is a black box */static short closedBox = NIL; /* is a closed box (uses chroot() jail) */static short restrictBox = NIL; /* is a restricted box */static short has_no_life = NIL; /* is a cretin with no life */ /* block environment init */static short block_env_init = NIL;static short hideDotFiles = NIL;/* hide files whose names start with . */ /* advertise filesystem root */static short advertisetheworld = NIL; /* only advertise own mailboxes and #shared */static short limitedadvertise = NIL; /* disable automatic shared namespaces */static short noautomaticsharedns = NIL;static short no822tztext = NIL; /* disable RFC [2]822 timezone text */ /* client principals include service name */static short kerb_cp_svr_name = NIL;static long locktimeout = 5; /* default lock timeout in minutes */ /* default prototypes */static MAILSTREAM *createProto = NIL;static MAILSTREAM *appendProto = NIL; /* default user flags */static char *userFlags[NUSERFLAGS] = {NIL};static NAMESPACE *nslist[3]; /* namespace list */static int logtry = 3; /* number of server login tries */ /* block notification */static blocknotify_t mailblocknotify = mm_blocknotify; /* logout function */static logouthook_t maillogouthook = NIL; /* logout data */static void *maillogoutdata = NIL; /* allow user config files */static short allowuserconfig = NIL; /* 1 = disable plaintext, 2 = if not SSL */static long disablePlaintext = NIL;static long list_max_level = 20;/* maximum level of list recursion */ /* facility for syslog */static int syslog_facility = LOG_MAIL; /* Path of the privileged system lock program (mlock). Normally set by * logic test. */static char *lockpgm = LOCKPGM;/* Directory used for shared locks. MUST be the same for all users of the * system, and MUST be protected 1777. /var/tmp may be preferable on some * systems. */static const char *tmpdir = "/tmp";/* Do not change shlock_mode. Doing so can cause mailbox corruption and * denial of service. It also defeats the entire purpose of the shared * lock mechanism. The right way to avoid shared locks is to set up a * closed box (see the closedBox setting). */ /* shared lock mode */static const int shlock_mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;/* It is STRONGLY recommended that you do not change dotlock_mode. Doing so * can cause denial of service with old dot-lock files left lying around. * However, since dot-locks are only used with traditional UNIX and MMDF * formats which are not normally shared, it is much less harmful to tamper * with this than with shlock_mode. */ /* dot-lock mode */static long dotlock_mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH; /* File/directory access and protection policies *//* Unlike shlock_mode, the ????_protection modes are intended to be fully * customizable according to site policy. The values here are recommended * settings, based upon the documented purposes of the namespaces. */ /* user space - only owner can read/write */static char *myMailboxDir = NIL;/* user space directory name */ /* default file protection */static long mbx_protection = S_IRUSR|S_IWUSR; /* default directory protection */static long dir_protection = S_IRUSR|S_IWUSR|S_IXUSR; /* user space for user "anonymous" */ /* anonymous home directory */static char *anonymousHome = NIL; /* #ftp - everybody can read, only owner can write */static char *ftpHome = NIL; /* ftp export home directory */ /* default ftp file protection */static long ftp_protection = S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH;static long ftp_dir_protection =/* default ftp directory protection */ S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; /* #public - everybody can read/write */static char *publicHome = NIL; /* public home directory */static long public_protection = /* default public file protection */ S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH; /* default public directory protection */static long public_dir_protection = S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH; /* #shared/ - owner and group members can read/write */static char *sharedHome = NIL; /* shared home directory */ /* default shared file protection */static long shared_protection = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP; /* default shared directory protection */static long shared_dir_protection = S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP; /* OS bug workarounds - should be avoided at all cost *//* Don't set fcntlhangbug unless you really have to, since it risks mailbox * corruption. The flocksim.c mechanism is designed to detect NFS access * and no-op in that cases only, so this flag should be unnecessary. */static short fcntlhangbug = NIL;/* flock() emulator using fcntl() is a no-op *//* Don't set netfsstatbug unless you really have to, since it dramatically * slows down traditional UNIX and MMDF mailbox performance. */static short netfsstatbug = NIL;/* compensate for broken stat() on network * filesystems (AFS and old NFS) *//* Note: setting disableLockWarning means that you assert that the * so-modified copy of this software will NEVER be used: * 1) in conjunction with any software which expects .lock files * 2) to access NFS-mounted files and directories * * Unless both of these conditions apply, then do not set this flag. * Instead, read the FAQ (item 7.10) and either use 1777 protection * on the mail spool, or install mlock. * * In addition, by setting this flag you also agree that you are fully * legally and morally responsible when (not if) mail files are damaged * as the result of your choice. * * The mlock tool exists for a reason. Use it. */ /* disable warning if can't make .lock file */static short disableLockWarning = NIL; /* UNIX Namespaces */ /* personal mh namespace */static NAMESPACE nsmhf = {"#mh/",'/',NIL,NIL};static NAMESPACE nsmh = {"#mhinbox",NIL,NIL,&nsmhf}; /* home namespace */static NAMESPACE nshome = {"",'/',NIL,&nsmh}; /* UNIX other user namespace */static NAMESPACE nsunixother = {"~",'/',NIL,NIL}; /* black box other user namespace */static NAMESPACE nsblackother = {"/",'/',NIL,NIL}; /* public (anonymous OK) namespace */static NAMESPACE nspublic = {"#public/",'/',NIL,NIL}; /* netnews namespace */static NAMESPACE nsnews = {"#news.",'.',NIL,&nspublic}; /* FTP export namespace */static NAMESPACE nsftp = {"#ftp/",'/',NIL,&nsnews}; /* shared (no anonymous) namespace */static NAMESPACE nsshared = {"#shared/",'/',NIL,&nsftp}; /* world namespace */static NAMESPACE nsworld = {"/",'/',NIL,&nsshared}; /* only shared and public namespaces */static NAMESPACE nslimited = {"#shared/",'/',NIL,&nspublic};#include "write.c" /* include safe writing routines */#include "crexcl.c" /* include exclusive create */#include "pmatch.c" /* include wildcard pattern matcher *//* Get all authenticators */#include "auths.c" /* Environment manipulate parameters * Accepts: function code * function-dependent value * Returns: function-dependent return value */void *env_parameters (long function,void *value){ void *ret = NIL; switch ((int) function) { case GET_NAMESPACE: ret = (void *) nslist; break; case SET_USERNAME: if (myUserName) fs_give ((void **) &myUserName); myUserName = cpystr ((char *) value); case GET_USERNAME: ret = (void *) myUserName; break; case SET_HOMEDIR: if (myHomeDir) fs_give ((void **) &myHomeDir); myHomeDir = cpystr ((char *) value); case GET_HOMEDIR: ret = (void *) myHomeDir; break; case SET_LOCALHOST: if (myLocalHost) fs_give ((void **) &myLocalHost); myLocalHost = cpystr ((char *) value); case GET_LOCALHOST: ret = (void *) myLocalHost; break; case SET_NEWSRC: if (myNewsrc) fs_give ((void **) &myNewsrc); myNewsrc = cpystr ((char *) value); case GET_NEWSRC: ret = (void *) myNewsrc; break; case SET_NEWSACTIVE: if (newsActive) fs_give ((void **) &newsActive); newsActive = cpystr ((char *) value); case GET_NEWSACTIVE: ret = (void *) newsActive; break; case SET_NEWSSPOOL: if (newsSpool) fs_give ((void **) &newsSpool); newsSpool = cpystr ((char *) value); case GET_NEWSSPOOL: ret = (void *) newsSpool; break; case SET_ANONYMOUSHOME: if (anonymousHome) fs_give ((void **) &anonymousHome); anonymousHome = cpystr ((char *) value); case GET_ANONYMOUSHOME: if (!anonymousHome) anonymousHome = cpystr (ANONYMOUSHOME); ret = (void *) anonymousHome; break; case SET_FTPHOME: if (ftpHome) fs_give ((void **) &ftpHome); ftpHome = cpystr ((char *) value); case GET_FTPHOME: ret = (void *) ftpHome; break; case SET_PUBLICHOME: if (publicHome) fs_give ((void **) &publicHome); publicHome = cpystr ((char *) value); case GET_PUBLICHOME: ret = (void *) publicHome; break; case SET_SHAREDHOME: if (sharedHome) fs_give ((void **) &sharedHome); sharedHome = cpystr ((char *) value); case GET_SHAREDHOME: ret = (void *) sharedHome; break; case SET_SYSINBOX: if (sysInbox) fs_give ((void **) &sysInbox); sysInbox = cpystr ((char *) value); case GET_SYSINBOX: ret = (void *) sysInbox; break; case SET_SSLCAPATH: /* this can be set null */ if (sslCApath) fs_give ((void **) &sslCApath); sslCApath = value ? cpystr ((char *) value) : value; break; case GET_SSLCAPATH: ret = (void *) sslCApath; break; case SET_LISTMAXLEVEL: list_max_level = (long) value; case GET_LISTMAXLEVEL: ret = (void *) list_max_level; break; case SET_MBXPROTECTION: mbx_protection = (long) value; case GET_MBXPROTECTION: ret = (void *) mbx_protection; break; case SET_DIRPROTECTION: dir_protection = (long) value; case GET_DIRPROTECTION: ret = (void *) dir_protection; break; case SET_LOCKPROTECTION: dotlock_mode = (long) value; case GET_LOCKPROTECTION: ret = (void *) dotlock_mode; break;⌨️ 快捷键说明
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