env_unix.c
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上传日期:2007-01-04
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- /*
- * Program: UNIX environment routines
- *
- * Author: Mark Crispin
- * Networks and Distributed Computing
- * Computing & Communications
- * University of Washington
- * Administration Building, AG-44
- * Seattle, WA 98195
- * Internet: MRC@CAC.Washington.EDU
- *
- * Date: 1 August 1988
- * Last Edited: 17 October 1999
- *
- * Copyright 1999 by the University of Washington
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appears in all copies and that both the
- * above copyright notice and this permission notice appear in supporting
- * documentation, and that the name of the University of Washington not be
- * used in advertising or publicity pertaining to distribution of the software
- * without specific, written prior permission. This software is made available
- * "as is", and
- * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
- * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
- * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
- * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
- #include <signal.h>
- #include <sys/wait.h>
- #include "write.c" /* include safe writing routines */
- /* Get all authenticators */
- #include "auths.c"
- /* c-client environment parameters */
- static const char *anonymous_user = "nobody";
- static const char *unlogged_user = "root";
- static char *myUserName = NIL; /* user name */
- static char *myHomeDir = NIL; /* home directory name */
- static char *myLocalHost = NIL; /* local host name */
- static char *myNewsrc = NIL; /* newsrc file name */
- static char *sysInbox = NIL; /* system inbox name */
- static char *newsActive = NIL; /* news active file */
- static char *newsSpool = NIL; /* news spool */
- /* anonymous home directory */
- static char *anonymousHome = NIL;
- static char *ftpHome = NIL; /* ftp export home directory */
- static char *publicHome = NIL; /* public home directory */
- static char *sharedHome = NIL; /* shared home directory */
- static char *blackBoxDir = NIL; /* black box directory name */
- /* black box default home directory */
- static char *blackBoxDefaultHome = NIL;
- static short anonymous = NIL; /* is anonymous */
- static short blackBox = NIL; /* is a black box */
- static short has_no_life = NIL; /* is a cretin with no life */
- static long list_max_level = 20;/* maximum level of list recursion */
- /* default file protection */
- static long mbx_protection = 0600;
- /* default directory protection */
- static long dir_protection = 0700;
- /* default lock file protection */
- static long lock_protection = 0666;
- /* default ftp file protection */
- static long ftp_protection = 0644;
- /* default public file protection */
- static long public_protection = 0666;
- /* default shared file protection */
- static long shared_protection = 0660;
- static long locktimeout = 5; /* default lock timeout */
- static long disableFcntlLock = /* flock() emulator is a no-op */
- #ifdef SVR4_DISABLE_FLOCK
- T
- #else
- NIL
- #endif
- ;
- static long lockEaccesError = /* warning on EACCES errors on .lock files */
- #ifdef IGNORE_LOCK_EACCES_ERRORS
- NIL
- #else
- T
- #endif
- ;
- /* 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;
- /* 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};
- /* Environment manipulate parameters
- * Accepts: function code
- * function-dependent value
- * Returns: function-dependent return value
- */
- void *env_parameters (long function,void *value)
- {
- switch ((int) function) {
- case SET_NAMESPACE:
- fatal ("SET_NAMESPACE not permitted");
- case GET_NAMESPACE:
- value = (void *) nslist;
- break;
- case SET_USERNAME:
- if (myUserName) fs_give ((void **) &myUserName);
- myUserName = cpystr ((char *) value);
- break;
- case GET_USERNAME:
- value = (void *) myUserName;
- break;
- case SET_HOMEDIR:
- if (myHomeDir) fs_give ((void **) &myHomeDir);
- myHomeDir = cpystr ((char *) value);
- break;
- case GET_HOMEDIR:
- value = (void *) myHomeDir;
- break;
- case SET_LOCALHOST:
- if (myLocalHost) fs_give ((void **) &myLocalHost);
- myLocalHost = cpystr ((char *) value);
- break;
- case GET_LOCALHOST:
- value = (void *) myLocalHost;
- break;
- case SET_NEWSRC:
- if (myNewsrc) fs_give ((void **) &myNewsrc);
- myNewsrc = cpystr ((char *) value);
- break;
- case GET_NEWSRC:
- value = (void *) myNewsrc;
- break;
- case SET_NEWSACTIVE:
- if (newsActive) fs_give ((void **) &newsActive);
- newsActive = cpystr ((char *) value);
- break;
- case GET_NEWSACTIVE:
- value = (void *) newsActive;
- break;
- case SET_NEWSSPOOL:
- if (newsSpool) fs_give ((void **) &newsSpool);
- newsSpool = cpystr ((char *) value);
- break;
- case GET_NEWSSPOOL:
- value = (void *) newsSpool;
- break;
- case SET_ANONYMOUSHOME:
- if (anonymousHome) fs_give ((void **) &anonymousHome);
- anonymousHome = cpystr ((char *) value);
- break;
- case GET_ANONYMOUSHOME:
- value = (void *) anonymousHome;
- break;
- case SET_FTPHOME:
- if (ftpHome) fs_give ((void **) &ftpHome);
- ftpHome = cpystr ((char *) value);
- break;
- case GET_FTPHOME:
- value = (void *) ftpHome;
- break;
- case SET_PUBLICHOME:
- if (publicHome) fs_give ((void **) &publicHome);
- publicHome = cpystr ((char *) value);
- break;
- case GET_PUBLICHOME:
- value = (void *) publicHome;
- break;
- case SET_SHAREDHOME:
- if (sharedHome) fs_give ((void **) &sharedHome);
- sharedHome = cpystr ((char *) value);
- break;
- case GET_SHAREDHOME:
- value = (void *) sharedHome;
- break;
- case SET_SYSINBOX:
- if (sysInbox) fs_give ((void **) &sysInbox);
- sysInbox = cpystr ((char *) value);
- break;
- case GET_SYSINBOX:
- value = (void *) sysInbox;
- break;
- case SET_LISTMAXLEVEL:
- list_max_level = (long) value;
- break;
- case GET_LISTMAXLEVEL:
- value = (void *) list_max_level;
- break;
- case SET_MBXPROTECTION:
- mbx_protection = (long) value;
- break;
- case GET_MBXPROTECTION:
- value = (void *) mbx_protection;
- break;
- case SET_DIRPROTECTION:
- dir_protection = (long) value;
- break;
- case GET_DIRPROTECTION:
- value = (void *) dir_protection;
- break;
- case SET_LOCKPROTECTION:
- lock_protection = (long) value;
- break;
- case GET_LOCKPROTECTION:
- value = (void *) lock_protection;
- break;
- case SET_FTPPROTECTION:
- ftp_protection = (long) value;
- break;
- case GET_FTPPROTECTION:
- value = (void *) ftp_protection;
- break;
- case SET_PUBLICPROTECTION:
- public_protection = (long) value;
- break;
- case GET_PUBLICPROTECTION:
- value = (void *) public_protection;
- break;
- case SET_SHAREDPROTECTION:
- shared_protection = (long) value;
- break;
- case GET_SHAREDPROTECTION:
- value = (void *) shared_protection;
- break;
- case SET_LOCKTIMEOUT:
- locktimeout = (long) value;
- break;
- case GET_LOCKTIMEOUT:
- value = (void *) locktimeout;
- break;
- case SET_DISABLEFCNTLLOCK:
- disableFcntlLock = (long) value;
- break;
- case GET_DISABLEFCNTLLOCK:
- value = (void *) disableFcntlLock;
- break;
- case SET_LOCKEACCESERROR:
- lockEaccesError = (long) value;
- break;
- case GET_LOCKEACCESERROR:
- value = (void *) lockEaccesError;
- break;
- case SET_USERHASNOLIFE:
- has_no_life = value ? T : NIL;
- break;
- case GET_USERHASNOLIFE:
- value = (void *) (has_no_life ? T : NIL);
- break;
- case SET_BLOCKNOTIFY:
- mailblocknotify = (blocknotify_t) value;
- case GET_BLOCKNOTIFY:
- value = (void *) mailblocknotify;
- break;
- default:
- value = NIL; /* error case */
- break;
- }
- return value;
- }
- /* Write current time
- * Accepts: destination string
- * optional format of day-of-week prefix
- * format of date and time
- * flag whether to append symbolic timezone
- */
- static void do_date (char *date,char *prefix,char *fmt,int suffix)
- {
- time_t tn = time (0);
- struct tm *t = gmtime (&tn);
- int zone = t->tm_hour * 60 + t->tm_min;
- int julian = t->tm_yday;
- t = localtime (&tn); /* get local time now */
- /* minus UTC minutes since midnight */
- zone = t->tm_hour * 60 + t->tm_min - zone;
- /* julian can be one of:
- * 36x local time is December 31, UTC is January 1, offset -24 hours
- * 1 local time is 1 day ahead of UTC, offset +24 hours
- * 0 local time is same day as UTC, no offset
- * -1 local time is 1 day behind UTC, offset -24 hours
- * -36x local time is January 1, UTC is December 31, offset +24 hours
- */
- if (julian = t->tm_yday -julian)
- zone += ((julian < 0) == (abs (julian) == 1)) ? -24*60 : 24*60;
- if (prefix) { /* want day of week? */
- sprintf (date,prefix,days[t->tm_wday]);
- date += strlen (date); /* make next sprintf append */
- }
- /* output the date */
- sprintf (date,fmt,t->tm_mday,months[t->tm_mon],t->tm_year+1900,
- t->tm_hour,t->tm_min,t->tm_sec,zone/60,abs (zone) % 60);
- /* append timezone suffix if desired */
- if (suffix) rfc822_timezone (date,(void *) t);
- }
- /* Write current time in RFC 822 format
- * Accepts: destination string
- */
- void rfc822_date (char *date)
- {
- do_date (date,"%s, ","%d %s %d %02d:%02d:%02d %+03d%02d",T);
- }
- /* Write current time in fixed-width RFC 822 format
- * Accepts: destination string
- */
- void rfc822_fixed_date (char *date)
- {
- do_date (date,NIL,"%02d %s %4d %02d:%02d:%02d %+03d%02d",NIL);
- }
- /* Write current time in internal format
- * Accepts: destination string
- */
- void internal_date (char *date)
- {
- do_date (date,NIL,"%02d-%s-%d %02d:%02d:%02d %+03d%02d",NIL);
- }
- /* Initialize server
- * Accepts: server name for syslog or NIL
- * /etc/services service name or NIL
- * alternate /etc/services service name or NIL
- * SASL service name or NIL
- * clock interrupt handler
- * kiss-of-death interrupt handler
- * hangup interrupt handler
- * termination interrupt handler
- */
- void server_init (char *server,char *service,char *altservice,char *sasl,
- void *clkint,void *kodint,void *hupint,void *trmint)
- {
- long port;
- struct servent *sv;
- struct sockaddr_in sin;
- int sinlen = sizeof (struct sockaddr_in);
- /* Don't use tcp_clienthost() since reverse DNS problems may slow down the
- * greeting message and cause the client to time out.
- */
- char *client = getpeername (0,(struct sockaddr *) &sin,(void *) &sinlen) ?
- "UNKNOWN" : inet_ntoa (sin.sin_addr);
- /* set server name in syslog */
- if (server) openlog (server,LOG_PID,LOG_MAIL);
- if (service && altservice && ((port = tcp_serverport ()) >= 0)) {
- if ((sv = getservbyname (service,"tcp")) && (port == ntohs (sv->s_port)))
- syslog (LOG_DEBUG,"%s service init from %s",service,client);
- else if ((sv = getservbyname (altservice,"tcp")) &&
- (port == ntohs (sv->s_port)))
- syslog (LOG_DEBUG,"%s alternative service init from %s",
- altservice,client);
- else syslog (LOG_DEBUG,"port %ld service init from %s",port,client);
- }
- /* set SASL name */
- if (sasl) mail_parameters (NIL,SET_SERVICENAME,(void *) sasl);
- arm_signal (SIGALRM,clkint); /* prepare for clock interrupt */
- arm_signal (SIGUSR2,kodint); /* prepare for Kiss Of Death */
- arm_signal (SIGHUP,hupint); /* prepare for hangup */
- arm_signal (SIGTERM,trmint); /* prepare for termination */
- }
- /* Wait for stdin input
- * Accepts: timeout in seconds
- * Returns: T if have input on stdin, else NIL
- */
- long server_input_wait (long seconds)
- {
- fd_set rfd,efd;
- struct timeval tmo;
- FD_ZERO (&rfd);
- FD_ZERO (&efd);
- FD_SET (0,&rfd);
- FD_SET (0,&efd);
- tmo.tv_sec = seconds; tmo.tv_usec = 0;
- return select (1,&rfd,0,&efd,&tmo) ? LONGT : NIL;
- }
- /* Server log in
- * Accepts: user name string
- * password string
- * argument count
- * argument vector
- * Returns: T if password validated, NIL otherwise
- */
- long server_login (char *user,char *pwd,int argc,char *argv[])
- {
- char *s,usr[MAILTMPLEN];
- struct passwd *pw;
- /* cretins still haven't given up */
- if (strlen (user) >= MAILTMPLEN)
- syslog (LOG_ALERT|LOG_AUTH,"System break-in attempt, host=%.80s",
- tcp_clienthost ());
- /* validate with case-independence */
- else if ((logtry > 0) && ((pw = getpwnam (strcpy (usr,user))) ||
- (pw = getpwnam (lcase (usr))))) {
- if (auth_md5.server) { /* if using CRAM-MD5 authentication */
- char *p = auth_md5_pwd (pw->pw_name);
- if (p) { /* verify password */
- if (strcmp (p,pwd) && strcmp (p,pwd+1)) pw = NIL;
- memset (p,0,strlen (p));/* erase sensitive information */
- fs_give ((void **) &p); /* flush erased password */
- if (pw) return pw_login (pw,pw->pw_name,pw->pw_dir,argc,argv);
- }
- else syslog (LOG_ERR|LOG_AUTH,
- "Login failed: %s has no CRAM-MD5 password, host=%.80s",
- pw->pw_name,tcp_clienthost ());
- }
- /* ordinary password authentication */
- else if ((pw = checkpw (pw,pwd,argc,argv)) ||
- ((*pwd == ' ') && (pw = checkpw (getpwnam(usr),pwd+1,argc,argv))))
- return pw_login (pw,pw->pw_name,pw->pw_dir,argc,argv);
- }
- s = (logtry-- > 0) ? "Login failure" : "Excessive login attempts";
- /* note the failure in the syslog */
- syslog (LOG_INFO,"%s user=%.80s host=%.80s",s,user,tcp_clienthost ());
- sleep (3); /* slow down possible cracker */
- return NIL;
- }
- /* Authenticated server log in
- * Accepts: user name string
- * argument count
- * argument vector
- * Returns: T if password validated, NIL otherwise
- */
- long authserver_login (char *user,int argc,char *argv[])
- {
- struct passwd *pw = getpwnam (user);
- return pw ? pw_login (pw,pw->pw_name,pw->pw_dir,argc,argv) : NIL;
- }
- /* Log in as anonymous daemon
- * Accepts: argument count
- * argument vector
- * Returns: T if successful, NIL if error
- */
- long anonymous_login (int argc,char *argv[])
- {
- struct passwd *pw = getpwnam ((char *) anonymous_user);
- /* log in Mr. A. N. Onymous */
- return pw ? pw_login (pw,NIL,NIL,argc,argv) : NIL;
- }
- /* Finish log in and environment initialization
- * Accepts: passwd struct for loginpw()
- * user name (NIL for anonymous)
- * home directory (NIL for anonymous)
- * argument count
- * argument vector
- * Returns: T if successful, NIL if error
- */
- long pw_login (struct passwd *pw,char *user,char *home,int argc,char *argv[])
- {
- long ret = NIL;
- char *u = user ? cpystr (user) : NIL;
- char *h = home ? cpystr (home) : NIL;
- if (pw->pw_uid && ((pw->pw_uid == geteuid ()) || loginpw (pw,argc,argv)) &&
- (ret = env_init (u,h))) chdir (myhomedir ());
- if (h) fs_give ((void **) &h);/* flush temporary home directory */
- if (u) fs_give ((void **) &u);/* flush temporary user name */
- return ret; /* return status */
- }
- /* Initialize environment
- * Accepts: user name
- * home directory name
- * Returns: T, always
- */
- long env_init (char *user,char *home)
- {
- extern MAILSTREAM CREATEPROTO;
- extern MAILSTREAM EMPTYPROTO;
- struct passwd *pw;
- struct stat sbuf;
- char *s,tmp[MAILTMPLEN];
- if (myUserName) fatal ("env_init called twice!");
- /* myUserName must be set before dorc() call */
- myUserName = cpystr (user ? user : (char *) anonymous_user);
- /* do systemwide configuration */
- dorc ("/etc/c-client.cf",NIL);
- if (!anonymousHome) anonymousHome = cpystr (ANONYMOUSHOME);
- if (user) { /* remember user name and home directory */
- if (blackBoxDir) { /* build black box directory name */
- sprintf (tmp,"%s/%s",blackBoxDir,myUserName);
- /* if black box if exists and directory */
- if (s = (!stat (tmp,&sbuf) && (sbuf.st_mode & S_IFDIR)) ?
- tmp : blackBoxDefaultHome) {
- sprintf (tmp,"%s/INBOX",myHomeDir = cpystr (s));
- sysInbox = cpystr (tmp);/* set black box values in their place */
- blackBox = T;
- /* mbox meaningless if black box */
- mail_parameters (NIL,DISABLE_DRIVER,(void *) "mbox");
- }
- }
- if (blackBox) /* black box? */
- nslist[0] = &nshome,nslist[1] = &nsblackother,nslist[2] = &nsshared;
- else { /* not a black box */
- nslist[0] = &nshome,nslist[1] = &nsunixother,nslist[2] = &nsshared;
- myHomeDir = cpystr (home);/* use real home directory */
- /* make sure user rc files don't try this */
- blackBoxDir = blackBoxDefaultHome = "";
- }
- }
- else { /* anonymous user */
- nslist[0] = nslist[1] = NIL,nslist[2] = &nsftp;
- sprintf (tmp,"%s/INBOX",myHomeDir = cpystr (anonymousHome));
- sysInbox = cpystr (tmp); /* make system INBOX */
- anonymous = T; /* flag as anonymous */
- /* make sure an error message happens */
- if (!blackBoxDir) blackBoxDir = blackBoxDefaultHome = anonymousHome;
- }
- dorc (strcat (strcpy (tmp,myHomeDir),"/.mminit"),T);
- dorc (strcat (strcpy (tmp,myHomeDir),"/.imaprc"),NIL);
- if (!myLocalHost) mylocalhost ();
- if (!myNewsrc) myNewsrc = cpystr(strcat (strcpy (tmp,myHomeDir),"/.newsrc"));
- if (!newsActive) newsActive = cpystr (ACTIVEFILE);
- if (!newsSpool) newsSpool = cpystr (NEWSSPOOL);
- if (!ftpHome && (pw = getpwnam ("ftp"))) ftpHome = cpystr (pw->pw_dir);
- if (!publicHome && (pw = getpwnam ("imappublic")))
- publicHome = cpystr (pw->pw_dir);
- if (!anonymous && !sharedHome && (pw = getpwnam ("imapshared")))
- sharedHome = cpystr (pw->pw_dir);
- /* force default prototype to be set */
- if (!createProto) createProto = &CREATEPROTO;
- if (!appendProto) appendProto = &EMPTYPROTO;
- /* re-do open action to get flags */
- (*createProto->dtb->open) (NIL);
- endpwent (); /* close pw database */
- return T;
- }
-
- /* Return my user name
- * Accepts: pointer to optional flags
- * Returns: my user name
- */
- char *myusername_full (unsigned long *flags)
- {
- char *ret = (char *) unlogged_user;
- if (!myUserName) { /* get user name if don't have it yet */
- struct passwd *pw;
- unsigned long euid = geteuid ();
- char *s = (char *) (euid ? getlogin () : NIL);
- /* look up getlogin() user name or EUID */
- if (!((s && *s && (pw = getpwnam (s)) && (pw->pw_uid == euid)) ||
- (pw = getpwuid (euid)))) fatal ("Unable to look up user name");
- /* init environment if not root */
- if (euid) env_init (pw->pw_name,((s=getenv("HOME")) && *s) ? s:pw->pw_dir);
- else ret = pw->pw_name; /* in case UID 0 user is other than root */
- }
- if (myUserName) { /* logged in? */
- if (flags) *flags = anonymous ? MU_ANONYMOUS : MU_LOGGEDIN;
- ret = myUserName; /* return user name */
- }
- else if (flags) *flags = MU_NOTLOGGEDIN;
- return ret;
- }
- /* Return my local host name
- * Returns: my local host name
- */
- char *mylocalhost ()
- {
- char tmp[MAILTMPLEN];
- struct hostent *host_name;
- if (!myLocalHost) {
- gethostname(tmp,MAILTMPLEN);/* get local host name */
- myLocalHost = cpystr ((host_name = gethostbyname (tmp)) ?
- host_name->h_name : tmp);
- }
- return myLocalHost;
- }
- /* Return my home directory name
- * Returns: my home directory name
- */
- char *myhomedir ()
- {
- if (!myHomeDir) myusername ();/* initialize if first time */
- return myHomeDir ? myHomeDir : "";
- }
- /* Return system standard INBOX
- * Accepts: buffer string
- */
- char *sysinbox ()
- {
- char tmp[MAILTMPLEN];
- if (!sysInbox) { /* initialize if first time */
- sprintf (tmp,"%s/%s",MAILSPOOL,myusername ());
- sysInbox = cpystr (tmp); /* system inbox is from mail spool */
- }
- return sysInbox;
- }
- /* Return mailbox directory name
- * Accepts: destination buffer
- * directory prefix
- * name in directory
- * Returns: file name or NIL if error
- */
- char *mailboxdir (char *dst,char *dir,char *name)
- {
- char tmp[MAILTMPLEN];
- if (dir || name) { /* if either argument provided */
- if (dir) strcpy (tmp,dir); /* write directory prefix */
- else tmp[0] = ' '; /* otherwise null string */
- if (name) strcat (tmp,name);/* write name in directory */
- /* validate name, return its name */
- if (!mailboxfile (dst,tmp)) return NIL;
- }
- else strcpy (dst,myhomedir());/* no arguments, wants home directory */
- return dst; /* return the name */
- }
- /* Return mailbox file name
- * Accepts: destination buffer
- * mailbox name
- * Returns: file name or empty string for driver-selected INBOX or NIL if error
- */
- char *mailboxfile (char *dst,char *name)
- {
- struct passwd *pw;
- char *dir = myhomedir ();
- *dst = ' '; /* default to empty string */
- /* check invalid name */
- if (!name || !*name || (*name == '{')) return NIL;
- /* check for INBOX */
- if (((name[0] == 'I') || (name[0] == 'i')) &&
- ((name[1] == 'N') || (name[1] == 'n')) &&
- ((name[2] == 'B') || (name[2] == 'b')) &&
- ((name[3] == 'O') || (name[3] == 'o')) &&
- ((name[4] == 'X') || (name[4] == 'x')) && !name[5]) {
- /* if restricted, canonicalize name of INBOX */
- if (anonymous || blackBox) name = "INBOX";
- else return dst; /* else driver selects the INBOX name */
- }
- /* restricted name? */
- else if ((*name == '#') || anonymous || blackBox) {
- if (strstr (name,"..") || strstr (name,"//") || strstr (name,"/~"))
- return NIL; /* none of these allowed when restricted */
- switch (*name) { /* what kind of restricted name? */
- case '#': /* namespace name */
- if (((name[1] == 'f') || (name[1] == 'F')) &&
- ((name[2] == 't') || (name[2] == 'T')) &&
- ((name[3] == 'p') || (name[3] == 'P')) &&
- (name[4] == '/') && (dir = ftpHome)) name += 5;
- else if (((name[1] == 'p') || (name[1] == 'P')) &&
- ((name[2] == 'u') || (name[2] == 'U')) &&
- ((name[3] == 'b') || (name[3] == 'B')) &&
- ((name[4] == 'l') || (name[4] == 'L')) &&
- ((name[5] == 'i') || (name[5] == 'I')) &&
- ((name[6] == 'c') || (name[6] == 'C')) &&
- (name[7] == '/') && (dir = publicHome)) name += 8;
- else if (!anonymous && ((name[1] == 's') || (name[1] == 'S')) &&
- ((name[2] == 'h') || (name[2] == 'H')) &&
- ((name[3] == 'a') || (name[3] == 'A')) &&
- ((name[4] == 'r') || (name[4] == 'R')) &&
- ((name[5] == 'e') || (name[5] == 'E')) &&
- ((name[6] == 'd') || (name[6] == 'D')) &&
- (name[7] == '/') && (dir = sharedHome)) name += 8;
- else return NIL; /* unknown namespace name */
- break;
- case '/': /* rooted restricted name */
- if (anonymous) return NIL;/* anonymous can't do this */
- dir = blackBoxDir; /* base is black box directory */
- name++; /* skip past delimiter */
- break;
- }
- }
- /* absolute path name? */
- else if (*name == '/') return strcpy (dst,name);
- /* some home directory? */
- else if ((*name == '~') && *++name) {
- if (*name == '/') name++; /* yes, my home directory? */
- else { /* no, copy user name */
- for (dir = dst; *name && (*name != '/'); *dir++ = *name++);
- *dir++ = ' '; /* tie off user name, look up in passwd file */
- if (!((pw = getpwnam (dst)) && (dir = pw->pw_dir))) return NIL;
- if (*name) name++; /* skip past the slash */
- }
- }
- /* build resulting name */
- sprintf (dst,"%s/%s",dir,name);
- return dst; /* return it */
- }
- /* Dot-lock file locker
- * Accepts: file name to lock
- * destination buffer for lock file name
- * open file description on file name to lock
- * Returns: T if success, NIL if failure
- */
- long dotlock_lock (char *file,DOTLOCK *base,int fd)
- {
- int ld,j;
- int i = locktimeout * 60 - 1;
- char *s,hitch[MAILTMPLEN],tmp[MAILTMPLEN];
- time_t t;
- struct stat sb;
- /* flush absurd file name */
- if (strlen (file) > 512) return NIL;
- /* build lock filename */
- sprintf (base->lock,"%s.lock",file);
- /* assume no pipe */
- base->pipei = base->pipeo = -1;
- /* until OK or out of tries */
- if (j = chk_notsymlink (base->lock,&sb)) do {
- t = time (0); /* get the time now */
- #ifdef NFSKLUDGE
- /* SUN-OS had an NFS, As kludgy as an albatross;
- * And everywhere that it was installed, It was a total loss.
- * -- MRC 9/25/91
- */
- /* time out old locks */
- if ((j > 0) && (t >= (sb.st_ctime + locktimeout * 60))) unlink(base->lock);
- /* build hitching post file name */
- sprintf (hitch,"%s.%lu.%d.",base->lock,(unsigned long) time (0),getpid ());
- j = strlen (hitch); /* append local host name */
- gethostname (hitch + j,(MAILTMPLEN - j) - 1);
- /* try to get hitching-post file */
- if ((ld = open (hitch,O_WRONLY|O_CREAT|O_EXCL,(int)lock_protection)) >= 0){
- close (ld); /* close the hitching-post */
- link (hitch,base->lock); /* tie hitching-post to lock, ignore failure */
- /* success if link count now 2 */
- ld = (!stat (hitch,&sb) && (sb.st_nlink == 2)) ? 0 : -1;
- unlink (hitch); /* flush hitching post */
- }
- #else
- /* time out old locks */
- if ((j > 0) && (t >= (sb.st_ctime + locktimeout * 60))) {
- unlink (base->lock); /* flush extant old lock */
- j = O_WRONLY | O_CREAT; /* try to grab it for ourselves */
- }
- else j = O_WRONLY | O_CREAT | O_EXCL;
- /* try to get the lock */
- if ((ld = open (strcpy (hitch,base->lock),j,(int) lock_protection)) >= 0)
- close (ld); /* close the lock file */
- #endif
- else switch (errno) { /* what happened? */
- case EACCES: /* protection fail */
- if (stat (hitch,&sb)) { /* file exists, fall into EEXIST case */
- int pi[2],po[2];
- /* make command pipes */
- if (!stat (LOCKPGM,&sb) && pipe (pi) >= 0) {
- if (pipe (po) >= 0) {
- /* make inferior process */
- if (!(j = fork ())) {
- if (!fork ()) { /* make grandchild so it's inherited by init */
- char *argv[4];/* prepare argument vector for */
- sprintf (tmp,"%d",fd);
- argv[0] = LOCKPGM; argv[1] = tmp;
- argv[2] = file; argv[3] = NIL;
- /* set parent's I/O to my O/I */
- dup2 (pi[1],1); dup2 (pi[1],2); dup2 (po[0],0);
- /* close all unnecessary descriptors */
- for (j = max (20,max (max (pi[0],pi[1]),max (po[0],po[1])));
- j >= 3; --j) if (j != fd) close (j);
- /* be our own process group */
- setpgrp (0,getpid ());
- /* now run it */
- execv (argv[0],argv);
- }
- _exit (1); /* child is done */
- }
- else if (j > 0) { /* reap child; grandchild now owned by init */
- grim_pid_reap (j,NIL);
- /* read response from locking program */
- if ((read (pi[0],tmp,1) == 1) && (tmp[0] == '+')) {
- /* success, record pipes */
- base->pipei = pi[0]; base->pipeo = po[1];
- /* close child's side of the pipes */
- close (pi[1]); close (po[0]);
- return LONGT;
- }
- }
- close (po[0]); close (po[1]);
- }
- close (pi[0]); close (pi[1]);
- }
- if (lockEaccesError) {/* punt silently if paranoid site */
- sprintf (tmp,"Mailbox vulnerable - directory %.80s",hitch);
- if (s = strrchr (tmp,'/')) *s = ' ';
- strcat (tmp," must have 1777 protection");
- mm_log (tmp,WARN);
- }
- base->lock[0] = ' '; /* give up on lock file */
- }
- case EEXIST: /* file already exists */
- break; /* try again */
- default: /* some other failure */
- sprintf (tmp,"Mailbox vulnerable - error creating %.80s: %s",
- hitch,strerror (errno));
- mm_log (tmp,WARN); /* this is probably not good */
- base->lock[0] = ' '; /* don't use lock files */
- break;
- }
- /* if failed to make lock file and retry OK */
- if ((ld < 0) && base->lock) {
- if (!(i%15)) { /* time to notify? */
- sprintf (tmp,"Mailbox %.80s is locked, will override in %d seconds...",
- file,i);
- mm_log (tmp,WARN);
- }
- sleep (1); /* wait 1 second before next try */
- }
- } while (i-- && (ld < 0) && base->lock[0]);
- /* failed if no longer a lock name */
- if (!base->lock[0]) return NIL;
- /* make sure others can break the lock */
- chmod (base->lock,(int) lock_protection);
- return LONGT;
- }
- /* Dot-lock file unlocker
- * Accepts: lock file name
- * Returns: T if success, NIL if failure
- */
- long dotlock_unlock (DOTLOCK *base)
- {
- long ret = LONGT;
- if (base && base->lock[0]) {
- if (base->pipei >= 0) { /* if running through a pipe unlocker */
- ret = (write (base->pipeo,"+",1) == 1);
- /* nuke the pipes */
- close (base->pipei); close (base->pipeo);
- }
- else ret = !unlink (base->lock);
- }
- return ret;
- }
- /* Lock file name
- * Accepts: scratch buffer
- * file name
- * type of locking operation (LOCK_SH or LOCK_EX)
- * pointer to return PID of locker
- * Returns: file descriptor of lock or negative if error
- */
- int lockname (char *lock,char *fname,int op,long *pid)
- {
- struct stat sbuf;
- *pid = 0; /* no locker PID */
- return stat (fname,&sbuf) ? -1 : lock_work (lock,&sbuf,op,pid);
- }
- /* Lock file descriptor
- * Accepts: file descriptor
- * lock file name buffer
- * type of locking operation (LOCK_SH or LOCK_EX)
- * Returns: file descriptor of lock or negative if error
- */
- int lockfd (int fd,char *lock,int op)
- {
- struct stat sbuf;
- return fstat (fd,&sbuf) ? -1 : lock_work (lock,&sbuf,op,NIL);
- }
- /* Lock file name worker
- * Accepts: lock file name
- * pointer to stat() buffer
- * type of locking operation (LOCK_SH or LOCK_EX)
- * pointer to return PID of locker
- * Returns: file descriptor of lock or negative if error
- */
- int lock_work (char *lock,void *sb,int op,long *pid)
- {
- struct stat lsb,fsb;
- struct stat *sbuf = sb;
- char tmp[MAILTMPLEN];
- long i;
- int fd;
- if (pid) *pid = 0; /* initialize return PID */
- /* make temporary lock file name */
- sprintf (lock,"/tmp/.%lx.%lx",(unsigned long) sbuf->st_dev,
- (unsigned long) sbuf->st_ino);
- while (T) { /* until get a good lock */
- do switch ((int) chk_notsymlink (lock,&lsb)) {
- case 1: /* exists just once */
- if (((fd = open (lock,O_RDWR,lock_protection)) >= 0) ||
- (errno != ENOENT) || (chk_notsymlink (lock,&lsb) >= 0)) break;
- case -1: /* name doesn't exist */
- fd = open (lock,O_RDWR|O_CREAT|O_EXCL,lock_protection);
- break;
- default: /* multiple hard links */
- mm_log ("hard link to lock name",ERROR);
- syslog (LOG_CRIT,"SECURITY PROBLEM: hard link to lock name: %.80s",lock);
- case 0: /* symlink (already did syslog) */
- return -1; /* fail: no lock file */
- } while ((fd < 0) && (errno == EEXIST));
- if (fd < 0) { /* failed to get file descriptor */
- syslog (LOG_INFO,"Mailbox lock file %s open failure: %s",lock,
- strerror (errno));
- return -1; /* fail: can't open lock file */
- }
- /* non-blocking form */
- if (op & LOCK_NB) i = flock (fd,op);
- else { /* blocking form */
- (*mailblocknotify) (BLOCK_FILELOCK,NIL);
- i = flock (fd,op);
- (*mailblocknotify) (BLOCK_NONE,NIL);
- }
- if (i) { /* failed, get other process' PID */
- if (pid && !fstat (fd,&fsb) && (i = min (fsb.st_size,MAILTMPLEN-1)) &&
- (read (fd,tmp,i) == i) && !(tmp[i] = 0) && ((i = atol (tmp)) > 0))
- *pid = i;
- close (fd); /* failed, give up on lock */
- return -1; /* fail: can't lock */
- }
- /* make sure this lock is good for us */
- if (!lstat (lock,&lsb) && ((lsb.st_mode & S_IFMT) != S_IFLNK) &&
- !fstat (fd,&fsb) && (lsb.st_dev == fsb.st_dev) &&
- (lsb.st_ino == fsb.st_ino) && (fsb.st_nlink == 1)) break;
- close (fd); /* lock not right, drop fd and try again */
- }
- /* make sure mode OK (don't use fchmod()) */
- chmod (lock,(int) lock_protection);
- return fd; /* success */
- }
- /* Check to make sure not a symlink
- * Accepts: file name
- * stat buffer
- * Returns: -1 if doesn't exist, NIL if symlink, else number of hard links
- */
- long chk_notsymlink (char *name,void *sb)
- {
- struct stat *sbuf = sb;
- /* name exists? */
- if (lstat (name,sbuf)) return -1;
- /* forbid symbolic link */
- if ((sbuf->st_mode & S_IFMT) == S_IFLNK) {
- mm_log ("symbolic link on lock name",ERROR);
- syslog (LOG_CRIT,"SECURITY PROBLEM: symbolic link on lock name: %.80s",
- name);
- return NIL;
- }
- return (long) sbuf->st_nlink; /* return number of hard links */
- }
- /* Unlock file descriptor
- * Accepts: file descriptor
- * lock file name from lockfd()
- */
- void unlockfd (int fd,char *lock)
- {
- /* delete the file if no sharers */
- if (!flock (fd,LOCK_EX|LOCK_NB)) unlink (lock);
- flock (fd,LOCK_UN); /* unlock it */
- close (fd); /* close it */
- }
- /* Set proper file protection for mailbox
- * Accepts: mailbox name
- * actual file path name
- * Returns: T, always
- */
- long set_mbx_protections (char *mailbox,char *path)
- {
- struct stat sbuf;
- int mode = (int) mbx_protection;
- if (*mailbox == '#') { /* possible namespace? */
- if (((mailbox[1] == 'f') || (mailbox[1] == 'F')) &&
- ((mailbox[2] == 't') || (mailbox[2] == 'T')) &&
- ((mailbox[3] == 'p') || (mailbox[3] == 'P')) &&
- (mailbox[4] == '/')) mode = (int) ftp_protection;
- else if (((mailbox[1] == 'p') || (mailbox[1] == 'P')) &&
- ((mailbox[2] == 'u') || (mailbox[2] == 'U')) &&
- ((mailbox[3] == 'b') || (mailbox[3] == 'B')) &&
- ((mailbox[4] == 'l') || (mailbox[4] == 'L')) &&
- ((mailbox[5] == 'i') || (mailbox[5] == 'I')) &&
- ((mailbox[6] == 'c') || (mailbox[6] == 'C')) &&
- (mailbox[7] == '/')) mode = (int) public_protection;
- else if (((mailbox[1] == 's') || (mailbox[1] == 'S')) &&
- ((mailbox[2] == 'h') || (mailbox[2] == 'H')) &&
- ((mailbox[3] == 'a') || (mailbox[3] == 'A')) &&
- ((mailbox[4] == 'r') || (mailbox[4] == 'R')) &&
- ((mailbox[5] == 'e') || (mailbox[5] == 'E')) &&
- ((mailbox[6] == 'd') || (mailbox[6] == 'D')) &&
- (mailbox[7] == '/')) mode = (int) shared_protection;
- }
- /* if a directory */
- if (!stat (path,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) {
- /* set owner search if allow read or write */
- if (mode & 0600) mode |= 0100;
- if (mode & 060) mode |= 010;/* set group search if allow read or write */
- if (mode & 06) mode |= 01; /* set world search if allow read or write */
- }
- chmod (path,mode); /* set the new protection, ignore failure */
- return LONGT;
- }
- /* Determine default prototype stream to user
- * Accepts: type (NIL for create, T for append)
- * Returns: default prototype stream
- */
- MAILSTREAM *default_proto (long type)
- {
- myusername (); /* make sure initialized */
- /* return default driver's prototype */
- return type ? appendProto : createProto;
- }
- /* Set up user flags for stream
- * Accepts: MAIL stream
- * Returns: MAIL stream with user flags set up
- */
- MAILSTREAM *user_flags (MAILSTREAM *stream)
- {
- int i;
- myusername (); /* make sure initialized */
- for (i = 0; i < NUSERFLAGS && userFlags[i]; ++i)
- if (!stream->user_flags[i]) stream->user_flags[i] = cpystr (userFlags[i]);
- return stream;
- }
- /* Return nth user flag
- * Accepts: user flag number
- * Returns: flag
- */
- char *default_user_flag (unsigned long i)
- {
- myusername (); /* make sure initialized */
- return userFlags[i];
- }
- /* Process rc file
- * Accepts: file name
- * .mminit flag
- * Don't even think of using this feature.
- */
- void dorc (char *file,long flag)
- {
- int i;
- char *s,*t,*k,tmp[MAILTMPLEN],tmpx[MAILTMPLEN];
- extern MAILSTREAM CREATEPROTO;
- extern MAILSTREAM EMPTYPROTO;
- DRIVER *d;
- FILE *f = fopen (file,"r");
- /* no file or ill-advised usage */
- if (!(f && (s = fgets (tmp,MAILTMPLEN,f)) && (t = strchr (s,'n')) &&
- (flag ||
- (!strcmp (s,"I accept the risk for IMAP toolkit 4.1.n") &&
- (s = fgets (tmp,MAILTMPLEN,f)) && (t = strchr (s,'n')))))) return;
- do {
- *t++ = ' '; /* tie off line, find second space */
- if ((k = strchr (s,' ')) && (k = strchr (++k,' '))) {
- *k++ = ' '; /* tie off two words*/
- lcase (s); /* make case-independent */
- if (!(userFlags[0] || strcmp (s,"set keywords"))) {
- k = strtok (k,", "); /* yes, get first keyword */
- /* copy keyword list */
- for (i = 0; k && i < NUSERFLAGS; ++i) {
- if (userFlags[i]) fs_give ((void **) &userFlags[i]);
- userFlags[i] = cpystr (k);
- k = strtok (NIL,", ");
- }
- }
- else if (!flag) { /* none of these valid in .mminit */
- if (!(createProto || strcmp (s,"set new-folder-format"))) {
- if (!strcmp (lcase (k),"same-as-inbox"))
- createProto = ((d = mail_valid (NIL,"INBOX",NIL)) &&
- strcmp (d->name,"dummy")) ?
- ((*d->open) (NIL)) : &CREATEPROTO;
- else if (!strcmp (k,"system-standard")) createProto = &CREATEPROTO;
- else { /* see if a driver name */
- for (d = (DRIVER *) mail_parameters (NIL,GET_DRIVERS,NIL);
- d && strcmp (d->name,k); d = d->next);
- if (d) createProto = (*d->open) (NIL);
- else { /* duh... */
- sprintf (tmpx,"Unknown new folder format in %s: %s",file,k);
- mm_log (tmpx,WARN);
- }
- }
- }
- if (!(appendProto || strcmp (s,"set empty-folder-format"))) {
- if (!strcmp (lcase (k),"same-as-inbox"))
- appendProto = ((d = mail_valid (NIL,"INBOX",NIL)) &&
- strcmp (d->name,"dummy")) ?
- ((*d->open) (NIL)) : &EMPTYPROTO;
- else if (!strcmp (k,"system-standard")) appendProto = &EMPTYPROTO;
- else { /* see if a driver name */
- for (d = (DRIVER *) mail_parameters (NIL,GET_DRIVERS,NIL);
- d && strcmp (d->name,k); d = d->next);
- if (d) appendProto = (*d->open) (NIL);
- else { /* duh... */
- sprintf (tmpx,"Unknown empty folder format in %s: %s",file,k);
- mm_log (tmpx,WARN);
- }
- }
- }
- else if (!strcmp (s,"set from-widget"))
- mail_parameters (NIL,SET_FROMWIDGET,strcmp (lcase (k),"header-only")
- ? (void *) T : NIL);
- else if (!strcmp (s,"set black-box-directory")) {
- if (blackBoxDir) /* users aren't allowed to do this */
- mm_log ("Can't set black-box-directory in user init",ERROR);
- else blackBoxDir = cpystr (k);
- }
- else if (!strcmp (s,"set black-box-default-home-directory")) {
- if (!blackBoxDir)
- mm_log ("Must set black-box-directory before default-home",ERROR);
- else if (blackBoxDefaultHome)
- mm_log ("Can't set black-box-default-home-directory in user init",
- ERROR);
- else blackBoxDefaultHome = cpystr (k);
- }
- else if (!strcmp (s,"set local-host")) {
- fs_give ((void **) &myLocalHost);
- myLocalHost = cpystr (k);
- }
- else if (!strcmp (s,"set news-active-file")) {
- fs_give ((void **) &newsActive);
- newsActive = cpystr (k);
- }
- else if (!strcmp (s,"set news-spool-directory")) {
- fs_give ((void **) &newsSpool);
- newsSpool = cpystr (k);
- }
- else if (!strcmp (s,"set news-state-file")) {
- fs_give ((void **) &myNewsrc);
- myNewsrc = cpystr (k);
- }
- else if (!strcmp (s,"set anonymous-home-directory")) {
- fs_give ((void **) &anonymousHome);
- anonymousHome = cpystr (k);
- }
- else if (!strcmp (s,"set ftp-export-directory")) {
- fs_give ((void **) &ftpHome);
- ftpHome = cpystr (k);
- }
- else if (!strcmp (s,"set public-home-directory")) {
- fs_give ((void **) &publicHome);
- publicHome = cpystr (k);
- }
- else if (!strcmp (s,"set shared-home-directory")) {
- fs_give ((void **) &sharedHome);
- sharedHome = cpystr (k);
- }
- else if (!strcmp (s,"set system-inbox")) {
- fs_give ((void **) &sysInbox);
- sysInbox = cpystr (k);
- }
- else if (!strcmp (s,"set rsh-command"))
- mail_parameters (NIL,SET_RSHCOMMAND,(void *) k);
- else if (!strcmp (s,"set rsh-path"))
- mail_parameters (NIL,SET_RSHPATH,(void *) k);
- else if (!strcmp (s,"set tcp-open-timeout"))
- mail_parameters (NIL,SET_OPENTIMEOUT,(void *) atol (k));
- else if (!strcmp (s,"set tcp-read-timeout"))
- mail_parameters (NIL,SET_READTIMEOUT,(void *) atol (k));
- else if (!strcmp (s,"set tcp-write-timeout"))
- mail_parameters (NIL,SET_WRITETIMEOUT,(void *) atol (k));
- else if (!strcmp (s,"set rsh-timeout"))
- mail_parameters (NIL,SET_RSHTIMEOUT,(void *) atol (k));
- else if (!strcmp (s,"set maximum-login-trials"))
- mail_parameters (NIL,SET_MAXLOGINTRIALS,(void *) atol (k));
- else if (!strcmp (s,"set lookahead"))
- mail_parameters (NIL,SET_LOOKAHEAD,(void *) atol (k));
- else if (!strcmp (s,"set prefetch"))
- mail_parameters (NIL,SET_PREFETCH,(void *) atol (k));
- else if (!strcmp (s,"set close-on-error"))
- mail_parameters (NIL,SET_CLOSEONERROR,(void *) atol (k));
- else if (!strcmp (s,"set imap-port"))
- mail_parameters (NIL,SET_IMAPPORT,(void *) atol (k));
- else if (!strcmp (s,"set pop3-port"))
- mail_parameters (NIL,SET_POP3PORT,(void *) atol (k));
- else if (!strcmp (s,"set uid-lookahead"))
- mail_parameters (NIL,SET_UIDLOOKAHEAD,(void *) atol (k));
- else if (!strcmp (s,"set mailbox-protection"))
- mbx_protection = atol (k);
- else if (!strcmp (s,"set directory-protection"))
- dir_protection = atol (k);
- else if (!strcmp (s,"set lock-protection"))
- lock_protection = atol (k);
- else if (!strcmp (s,"set ftp-protection"))
- ftp_protection = atol (k);
- else if (!strcmp (s,"set public-protection"))
- public_protection = atol (k);
- else if (!strcmp (s,"set shared-protection"))
- shared_protection = atol (k);
- else if (!strcmp (s,"set dot-lock-file-timeout"))
- locktimeout = atol (k);
- else if (!strcmp (s,"set disable-fcntl-locking"))
- disableFcntlLock = atol (k);
- else if (!strcmp (s,"set lock-eacces-error"))
- lockEaccesError = atol (k);
- else if (!strcmp (s,"set list-maximum-level"))
- list_max_level = atol (k);
- else if (!strcmp (s,"set allowed-login-attempts"))
- logtry = atoi (k);
- else if (!strcmp (s,"set try-alt-driver-first"))
- mail_parameters (NIL,SET_TRYALTFIRST,(void *) atol (k));
- else if (!strcmp (s,"set allow-reverse-dns"))
- mail_parameters (NIL,SET_ALLOWREVERSEDNS,(void *) atol (k));
- }
- }
- }
- while ((s = fgets (tmp,MAILTMPLEN,f)) && (t = strchr (s,'n')));
- fclose (f); /* flush the file */
- }
- /* INBOX create function for tmail/dmail use only
- * Accepts: mail stream
- * path name buffer, preloaded with driver-dependent path
- * Returns: T on success, NIL on failure
- *
- * This routine is evil and a truly incredible kludge. It is private for
- * tmail/dmail and is not supported for any other application.
- */
- long path_create (MAILSTREAM *stream,char *path)
- {
- long ret;
- /* do the easy thing if not a black box */
- if (!blackBox) return mail_create (stream,path);
- /* toss out driver dependent names */
- printf (path,"%s/INBOX",myhomedir ());
- blackBox = NIL; /* well that's evil - evil is going on */
- ret = mail_create (stream,path);
- blackBox = T; /* restore the box */
- return ret;
- }
- /* Default block notify routine
- * Accepts: reason for calling
- * data
- * Returns: data
- */
- void *mm_blocknotify (int reason,void *data)
- {
- void *ret = data;
- switch (reason) {
- case BLOCK_SENSITIVE: /* entering sensitive code */
- data = (void *) max (alarm (0),1);
- break;
- case BLOCK_NONSENSITIVE: /* exiting sensitive code */
- if ((unsigned int) data) alarm ((unsigned int) data);
- break;
- default: /* ignore all other reasons */
- break;
- }
- return ret;
- }