openbsd-compat/bsd-cray.c

/* 
 * $Id: bsd-cray.c,v 1.10 2003/05/02 21:32:56 dtucker Exp $
 *
 * bsd-cray.c
 *
 * Copyright (c) 2002, Cray Inc.  (Wendy Palm <wendyp@cray.com>)
 * Significant portions provided by 
 *          Wayne Schroeder, SDSC <schroeder@sdsc.edu>
 *          William Jones, UTexas <jones@tacc.utexas.edu>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Created: Apr 22 16.34:00 2002 wp
 *
 * This file contains functions required for proper execution
 * on UNICOS systems.
 *
 */
#ifdef _UNICOS

#include <udb.h>
#include <tmpdir.h>
#include <unistd.h>
#include <sys/category.h>
#include <utmp.h>
#include <sys/jtab.h>
#include <signal.h>
#include <sys/priv.h>
#include <sys/secparm.h>
#include <sys/tfm.h>
#include <sys/usrv.h>
#include <sys/sysv.h>
#include <sys/sectab.h>
#include <sys/secstat.h>
#include <sys/stat.h>
#include <sys/session.h>
#include <stdlib.h>
#include <pwd.h>
#include <fcntl.h>
#include <errno.h>
#include <ia.h>
#include <urm.h>
#include "ssh.h"
#include "log.h"
#include "servconf.h"
#include "bsd-cray.h"

#define MAXACID 80

extern ServerOptions options;

char cray_tmpdir[TPATHSIZ+1];		    /* job TMPDIR path */

struct		sysv sysv;	/* system security structure */
struct		usrv usrv;      /* user   security structure */

/*
 * Functions.
 */
void cray_retain_utmp(struct utmp *, int);
void cray_delete_tmpdir(char *, int, uid_t);
void cray_init_job(struct passwd *);
void cray_set_tmpdir(struct utmp *);
void cray_login_failure(char *, int);
int cray_setup(uid_t, char *, const char *);
int cray_access_denied(char *);

void
cray_login_failure(char *username, int errcode)
{
	struct udb	*ueptr;		/* UDB pointer for username */
	ia_failure_t	fsent;		/* ia_failure structure */
	ia_failure_ret_t fret;		/* ia_failure return stuff */
	struct jtab	jtab;		/* job table structure */
	int		jid = 0;	/* job id */

	if ((jid = getjtab(&jtab)) < 0) {
		debug("cray_login_failure(): getjtab error");
	}
	getsysudb();
	if ((ueptr = getudbnam(username)) == UDB_NULL) {
		debug("cray_login_failure(): getudbname() returned NULL");
	}
	endudb();
	fsent.revision	= 0;
	fsent.uname	= username;
	fsent.host	= (char *)get_canonical_hostname(options.verify_reverse_mapping);
	fsent.ttyn	= "sshd";
	fsent.caller	= IA_SSHD;
	fsent.flags	= IA_INTERACTIVE;
	fsent.ueptr	= ueptr;
	fsent.jid	= jid;
	fsent.errcode	= errcode;
	fsent.pwdp	= NULL;
	fsent.exitcode	= 0;	/* dont exit in ia_failure() */

	fret.revision	= 0;
	fret.normal	= 0;

	/*
	 * Call ia_failure because of an login failure.
	 */
	ia_failure(&fsent,&fret);
}

/*
 *  Cray access denied
 */
int
cray_access_denied(char *username)
{
	struct udb	*ueptr;		/* UDB pointer for username */
	int 		errcode;	/* IA errorcode */

	errcode = 0;
	getsysudb();
	if ((ueptr = getudbnam(username)) == UDB_NULL) {
		debug("cray_login_failure(): getudbname() returned NULL");
	}
	endudb();
	if (ueptr && ueptr->ue_disabled)
		errcode = IA_DISABLED;
	if (errcode)
		cray_login_failure(username, errcode);
	return (errcode);
}

/*
 * record_failed_login: generic "login failed" interface function
 */
void
record_failed_login(const char *user, const char *ttyname)
{
	cray_login_failure((char *)user, IA_UDBERR);
}

int
cray_setup (uid_t uid, char *username, const char *command)
{
	extern struct udb *getudb();
	extern char *setlimits();

	int err;                      /* error return */
	time_t		system_time;	/* current system clock */
	time_t		expiration_time; /* password expiration time */
	int		maxattempts;	/* maximum no. of failed login attempts */
	int		SecureSys;	/* unicos security flag */
	int		minslevel = 0;	/* system minimum security level */
	int		i, j;
	int		valid_acct = -1; /* flag for reading valid acct */
	char acct_name[MAXACID]  = { "" }; /* used to read acct name */
	struct		jtab jtab;	/* Job table struct */
	struct		udb ue;		/* udb entry for logging-in user */
	struct		udb *up;	/* pointer to UDB entry */
	struct		secstat secinfo; /* file  security attributes */
	struct          servprov init_info; /* used for sesscntl() call */
	int		jid;		/* job ID */
	int		pid;		/* process ID */
	char		*sr;            /* status return from setlimits() */
	char		*ttyn = NULL;	/* ttyname or command name*/
	char		hostname[MAXHOSTNAMELEN];
	passwd_t	pwdacm,
			pwddialup,
			pwdudb,
			pwdwal,
			pwddce;		/* passwd stuff for ia_user */
	ia_user_ret_t	uret;		/* stuff returned from ia_user */
	ia_user_t	usent;		/* ia_user main structure */
	int		ia_rcode;	/* ia_user return code */
	ia_failure_t	fsent;		/* ia_failure structure */
	ia_failure_ret_t fret;		/* ia_failure return stuff */
	ia_success_t	ssent;		/* ia_success structure */
	ia_success_ret_t sret;		/* ia_success return stuff */
	int		ia_mlsrcode;    /* ia_mlsuser return code */
	int		secstatrc;      /* [f]secstat return code */

	if (SecureSys = (int)sysconf(_SC_CRAY_SECURE_SYS)) {
		getsysv(&sysv, sizeof(struct sysv));
		minslevel = sysv.sy_minlvl;
		if (getusrv(&usrv) < 0) {
			debug("getusrv() failed, errno = %d",errno);
			exit(1);
		}
	}
	hostname[0] = '\0';
	strncpy(hostname,
	   (char *)get_canonical_hostname(options.verify_reverse_mapping),
	   MAXHOSTNAMELEN);
        /*
         *  Fetch user's UDB entry.
         */
        getsysudb();
        if ((up = getudbnam(username)) == UDB_NULL) {
                debug("cannot fetch user's UDB entry");
                exit(1);
        }

        /*
         *  Prevent any possible fudging so perform a data
         *  safety check and compare the supplied uid against
         *  the udb's uid.
         */
        if (up->ue_uid != uid) {
                debug("IA uid missmatch");
                exit(1);
        }
	endudb();

	if ((jid = getjtab (&jtab)) < 0) {
		debug("getjtab");
		return -1;
	}
	pid = getpid();
	ttyn = ttyname(0);
	if (SecureSys) {
		if (ttyn) {
			secstatrc = secstat(ttyn, &secinfo);
		} else {
			secstatrc = fsecstat(1, &secinfo);
		}
		if (secstatrc == 0) {
			debug("[f]secstat() successful");
		} else {
			debug("[f]secstat() error, rc = %d", secstatrc);
			exit(1);
		}
	}
	if ((ttyn == NULL) && ((char *)command != NULL))
		ttyn = (char *)command;
        /*
         *  Initialize all structures to call ia_user
         */
        usent.revision = 0;
        usent.uname    = username;
        usent.host     = hostname;
        usent.ttyn     = ttyn;
        usent.caller   = IA_SSHD; 
        usent.pswdlist = &pwdacm;
        usent.ueptr    = &ue;
        usent.flags    = IA_INTERACTIVE | IA_FFLAG;
        pwdacm.atype   = IA_SECURID;
        pwdacm.pwdp    = NULL;
        pwdacm.next    = &pwdudb;

        pwdudb.atype   = IA_UDB;
        pwdudb.pwdp    = NULL;
        pwdudb.next    = &pwddce;

        pwddce.atype   = IA_DCE;
        pwddce.pwdp    = NULL;
        pwddce.next    = &pwddialup;

        pwddialup.atype = IA_DIALUP;
        pwddialup.pwdp  = NULL;
        /* pwddialup.next  = &pwdwal; */
        pwddialup.next  = NULL;

        pwdwal.atype = IA_WAL;
        pwdwal.pwdp  = NULL;
        pwdwal.next  = NULL;

        uret.revision = 0;
        uret.pswd     = NULL;
        uret.normal   = 0;

        ia_rcode = ia_user(&usent, &uret);

        switch (ia_rcode) {
                /*
                 *  These are acceptable return codes from ia_user()
                 */
                case IA_UDBWEEK:        /* Password Expires in 1 week */
		     expiration_time = ue.ue_pwage.time + ue.ue_pwage.maxage;
		     printf ("WARNING - your current password will expire %s\n",
                     ctime((const time_t *)&expiration_time));
                     break;
                case IA_UDBEXPIRED:
		     if (ttyname(0) != NULL) {
		     /* Force a password change */
		         printf("Your password has expired; Choose a new one.\n");
		         execl("/bin/passwd", "passwd", username, 0);
		         exit(9);
		     }

		     break;
                case IA_NORMAL:         /* Normal Return Code */
                     break;
                case IA_BACKDOOR:
                     strcpy(ue.ue_name, "root");
                     strcpy(ue.ue_passwd, "");
                     strcpy(ue.ue_dir, "/");
                     strcpy(ue.ue_shell, "/bin/sh");
                     strcpy(ue.ue_age, "");
                     strcpy(ue.ue_comment, "");
                     strcpy(ue.ue_loghost, "");
                     strcpy(ue.ue_logline, "");
                     ue.ue_uid=-1;
                     ue.ue_nice[UDBRC_INTER]=0;
                     for (i=0;i<MAXVIDS;i++)
                         ue.ue_gids[i]=0;
                     ue.ue_logfails=0;
                     ue.ue_minlvl=minslevel; 
                     ue.ue_maxlvl=minslevel;
                     ue.ue_deflvl=minslevel;
                     ue.ue_defcomps=0;
                     ue.ue_comparts=0;
                     ue.ue_permits=0;
                     ue.ue_trap=0;
                     ue.ue_disabled=0;
                     ue.ue_logtime=0;
                     break;
                case IA_CONSOLE:        /* Superuser not from Console */
		case IA_TRUSTED:	/* Trusted user */
		     if (options.permit_root_login > PERMIT_NO)
                     	break;		/* Accept root login */
   	        default:
                /*
                 *  These are failed return codes from ia_user()
                 */
		     switch (ia_rcode) 
		       {
		       case IA_BADAUTH:
			 printf ("Bad authorization, access denied.\n");
			 break;
		       case IA_DIALUPERR:
			 break;
		       case IA_DISABLED:
			 printf ("Your login has been disabled. Contact the system ");
			 printf ("administrator for assistance.\n");
			 break;
		       case IA_GETSYSV:
			 printf ("getsysv() failed - errno = %d\n", errno);
			 break;
		       case IA_LOCALHOST:
			 break;
		       case IA_MAXLOGS:
			 printf ("Maximum number of failed login attempts exceeded.\n");
			 printf ("Access denied.\n");
			 break;
		       case IA_NOPASS:
			 break;
		       case IA_PUBLIC:
			 break;
		       case IA_SECURIDERR:
			 break;
		       case IA_CONSOLE:
			 break;
		       case IA_TRUSTED:
			 break;
		       case IA_UDBERR:
			 break;
		       case IA_UDBPWDNULL:
			 /* 
			  * NULL password not allowed on MLS systems
			  */
			 if (SecureSys) {
			   printf("NULL Password not allowed on MLS systems.\n");
			 }
			 break;
		       case IA_UNKNOWN:
			 break;
		       case IA_UNKNOWNYP:
			 break;
		       case IA_WALERR:
			 break;
		       default:
			 /* nothing special */
			 ;
		       }   /* 2. switch  (ia_rcode) */
		     /*
		      *  Authentication failed.
		      */
		     printf("sshd: Login incorrect, (0%o)\n",
			    ia_rcode-IA_ERRORCODE);
		     
		     /*
		      *  Initialize structure for ia_failure
		      *  which will exit.
		      */
		     fsent.revision = 0;
		     fsent.uname    = username;
		     fsent.host     = hostname;
		     fsent.ttyn     = ttyn;
		     fsent.caller   = IA_SSHD;
		     fsent.flags    = IA_INTERACTIVE;
		     fsent.ueptr    = &ue;
		     fsent.jid      = jid;
		     fsent.errcode  = ia_rcode;
		     fsent.pwdp     = uret.pswd;
		     fsent.exitcode = 1;
		     
		     fret.revision  = 0;
		     fret.normal    = 0;
		     
		     /*
		      *  Call ia_failure because of an IA failure.
		      *  There is no return because ia_failure exits.
		      */
	
		     ia_failure(&fsent,&fret);

		     exit(1); 
	}   /* 1. switch  (ia_rcode) */
	ia_mlsrcode = IA_NORMAL;
	if (SecureSys) {
		debug("calling ia_mlsuser()");
		ia_mlsrcode = ia_mlsuser (&ue, &secinfo, &usrv, NULL, 0);
	}
	if (ia_mlsrcode != IA_NORMAL) {
		printf("sshd: Login incorrect, (0%o)\n",
		ia_mlsrcode-IA_ERRORCODE);
		/*
 		 *  Initialize structure for ia_failure
 		 *  which will exit.
		*/
		fsent.revision = 0;
		fsent.uname    = username;
		fsent.host     = hostname;
		fsent.ttyn     = ttyn;
		fsent.caller   = IA_SSHD;
		fsent.flags    = IA_INTERACTIVE;
		fsent.ueptr    = &ue;
		fsent.jid      = jid;
		fsent.errcode  = ia_mlsrcode;
		fsent.pwdp     = uret.pswd;
		fsent.exitcode = 1;
		fret.revision  = 0;
		fret.normal    = 0;

		/*
		*  Call ia_failure because of an IA failure.
		*  There is no return because ia_failure exits.
		*/
		ia_failure(&fsent,&fret);
		exit(1); 
	}

        /* Provide login status information */
        if (options.print_lastlog && ue.ue_logtime != 0) {
            printf("Last successful login was : %.*s ",
                    19, (char *)ctime(&ue.ue_logtime));
  
           if (*ue.ue_loghost != '\0')
                printf("from %.*s\n", sizeof(ue.ue_loghost), ue.ue_loghost);
 
            else printf("on %.*s\n", sizeof(ue.ue_logline), ue.ue_logline);
 
            if ( SecureSys && (ue.ue_logfails != 0)) 
                printf("  followed by %d failed attempts\n", ue.ue_logfails);
        }

	
	/*
	 * Call ia_success to process successful I/A.
	 */
	ssent.revision = 0;
	ssent.uname = username;
	ssent.host = hostname;
	ssent.ttyn = ttyn;
	ssent.caller = IA_SSHD;
	ssent.flags = IA_INTERACTIVE;
	ssent.ueptr = &ue;
	ssent.jid = jid;
	ssent.errcode = ia_rcode;
	ssent.us = NULL;
	ssent.time = 1;      		 /* Set ue_logtime */

	sret.revision = 0;
	sret.normal = 0;

	ia_success(&ssent,&sret);

        /*
         * Query for account, iff > 1 valid acid & askacid permbit
         */
        if (((ue.ue_permbits & PERMBITS_ACCTID) ||
             (ue.ue_acids[0] >= 0) && (ue.ue_acids[1] >= 0)) &&
            ue.ue_permbits & PERMBITS_ASKACID) {
		if (ttyname(0) != NULL) {
		  debug("cray_setup: ttyname true case, %.100s", ttyname);
                  while (valid_acct == -1) {
                        printf("Account (? for available accounts)"
                               " [%s]: ", acid2nam(ue.ue_acids[0]));
                        gets(acct_name);
                        switch (acct_name[0]) {
                        case EOF:
                                exit(0);
                                break;
                        case '\0':
                                valid_acct = ue.ue_acids[0];
                                strcpy(acct_name, acid2nam(valid_acct));
                                break;
                        case '?':
                                /* Print the list 3 wide */
                                for (i = 0, j = 0; i < MAXVIDS; i++) {
                                        if (ue.ue_acids[i] == -1) {
                                                printf("\n");
                                                break;
                                        }
                                        if (++j == 4) {
                                                j = 1;
                                                printf("\n");
                                        }
                                        printf(" %s",
                                               acid2nam(ue.ue_acids[i]));
                                }
                                if (ue.ue_permbits & PERMBITS_ACCTID)
                                        printf("\"acctid\" permbit also allows"
                                               " you to select any valid "
                                               "account name.\n");
                                printf("\n");
                                break;
                        default:
                                if ((valid_acct = nam2acid(acct_name)) == -1)                                        printf("Account id not found for"
                                               " account name \"%s\"\n\n",
                                               acct_name);
                                break;
                        }
                        /*
                         * If an account was given, search the user's
                         * acids array to verify they can use this account.
                         */
                        if ((valid_acct != -1) &&
                            !(ue.ue_permbits & PERMBITS_ACCTID)) {
                                for (i = 0; i < MAXVIDS; i++) {
                                        if (ue.ue_acids[i] == -1)
                                                break;
                                        if (valid_acct == ue.ue_acids[i])
                                                break;
                                }
                                if (i == MAXVIDS ||
                                    ue.ue_acids[i] == -1) {
                                        fprintf(stderr, "Cannot set"
                                                " account name to "
                                                "\"%s\", permission "
                                                "denied\n\n", acct_name);
                                        valid_acct = -1;
                                }
                        }
                  }
		} else {
			/*
			 * The client isn't connected to a terminal and can't
			 * respond to an acid prompt.  Use default acid.
			 */
			debug("cray_setup: ttyname false case, %.100s", ttyname);
			valid_acct = ue.ue_acids[0];
		}
        } else {
                /*
                 * The user doesn't have the askacid permbit set or
                 * only has one valid account to use.
                 */
                valid_acct = ue.ue_acids[0];
        }
        if (acctid(0, valid_acct) < 0) {
                printf ("Bad account id: %d\n", valid_acct);
                exit(1);
        }

/* set up shares and quotas */
/* Now set shares, quotas, limits, including CPU time for the (interactive) 
 * job and process, and set up permissions (for chown etc), etc.
 */
	if (setshares(ue.ue_uid, valid_acct, printf, 0, 0)) {
		printf("Unable to give %d shares to <%s>(%d/%d)\n", ue.ue_shares, ue.ue_name, ue.ue_uid, valid_acct);
		exit(1);
        }

	sr = setlimits(username, C_PROC, pid, UDBRC_INTER);
	if (sr != NULL) {
		debug("%.200s", sr);
		exit(1);
	}
	sr = setlimits(username, C_JOB, jid, UDBRC_INTER);
	if (sr != NULL) {
		debug("%.200s", sr);
		exit(1);
	}
	/*
 	 * Place the service provider information into
	 * the session table (Unicos) or job table (Unicos/mk).
	 * There exist double defines for the job/session table in
	 * unicos/mk (jtab.h) so no need for a compile time switch.
	 */
	bzero((char *)&init_info, sizeof(struct servprov));
	init_info.s_sessinit.si_id  = URM_SPT_LOGIN;
	init_info.s_sessinit.si_pid = getpid();
	init_info.s_sessinit.si_sid = jid;
	init_info.s_routing.seqno = 0;
	init_info.s_routing.iadrs = 0;
	sesscntl(0, S_SETSERVPO, (int)&init_info);

	/*
	 * Set user and controlling tty security attributes.
	 */
	if (SecureSys) {
		if (setusrv(&usrv) == -1) {
			debug("setusrv() failed, errno = %d",errno);
			exit(1);
		}
	}

        return(0);
}

/*
 * The rc.* and /etc/sdaemon methods of starting a program on unicos/unicosmk
 * can have pal privileges that sshd can inherit which
 * could allow a user to su to root with out a password.
 * This subroutine clears all privileges.
 */
void
drop_cray_privs()
{
#if defined(_SC_CRAY_PRIV_SU)
	priv_proc_t*		  privstate;
	int			  result;
	extern	    int		  priv_set_proc();
	extern	    priv_proc_t*  priv_init_proc();

	/*
	 * If ether of theses two flags are not set
	 * then don't allow this version of ssh to run.
	 */
	if (!sysconf(_SC_CRAY_PRIV_SU))
		fatal("Not PRIV_SU system.");
	if (!sysconf(_SC_CRAY_POSIX_PRIV))
		fatal("Not POSIX_PRIV.");

	debug("Setting MLS labels.");;

	if (sysconf(_SC_CRAY_SECURE_MAC)) {
		usrv.sv_minlvl = SYSLOW;
		usrv.sv_actlvl = SYSHIGH;
		usrv.sv_maxlvl = SYSHIGH;
	} else {
		usrv.sv_minlvl = sysv.sy_minlvl;
		usrv.sv_actlvl = sysv.sy_minlvl;
		usrv.sv_maxlvl = sysv.sy_maxlvl;
	}       
	usrv.sv_actcmp = 0;
	usrv.sv_valcmp = sysv.sy_valcmp;

	usrv.sv_intcat = TFM_SYSTEM;
	usrv.sv_valcat |= (TFM_SYSTEM | TFM_SYSFILE);

	if (setusrv(&usrv) < 0)
		fatal("%s(%d): setusrv(): %s", __FILE__, __LINE__,
		    strerror(errno));

	if ((privstate = priv_init_proc()) != NULL) {
		result = priv_set_proc(privstate);
		if (result != 0 )
			fatal("%s(%d): priv_set_proc(): %s",
			    __FILE__, __LINE__, strerror(errno));
		priv_free_proc(privstate);
	}
	debug ("Privileges should be cleared...");
#else
	/* XXX: do this differently */
#	error Cray systems must be run with _SC_CRAY_PRIV_SU on!
#endif
}


/*
 *  Retain utmp/wtmp information - used by cray accounting.
 */
void
cray_retain_utmp(struct utmp *ut, int pid)
{
	int fd;
	struct utmp utmp;

	if ((fd = open(UTMP_FILE, O_RDONLY)) != -1) {
		while (read(fd, (char *)&utmp, sizeof(utmp)) == sizeof(utmp)) {
			if (pid == utmp.ut_pid) {
				ut->ut_jid = utmp.ut_jid;
				strncpy(ut->ut_tpath, utmp.ut_tpath, sizeof(utmp.ut_tpath));
				strncpy(ut->ut_host, utmp.ut_host, sizeof(utmp.ut_host));
				strncpy(ut->ut_name, utmp.ut_name, sizeof(utmp.ut_name));
				break;
			}
		}
		close(fd);
	}
	else
	fatal("Unable to open utmp file");
}

/*
 * tmpdir support.
 */

/*
 * find and delete jobs tmpdir.
 */
void
cray_delete_tmpdir(char *login, int jid, uid_t uid)
{
	int child;
	static char jtmp[TPATHSIZ];
	struct stat statbuf;
	int c;
	int wstat;

	for (c = 'a'; c <= 'z'; c++) {
		snprintf(jtmp, TPATHSIZ, "%s/jtmp.%06d%c", JTMPDIR, jid, c);
		if (stat(jtmp, &statbuf) == 0 && statbuf.st_uid == uid)
			break;
	}

	if (c > 'z')
		return;

	if ((child = fork()) == 0) {
		execl(CLEANTMPCMD, CLEANTMPCMD, login, jtmp, (char *)NULL);
		fatal("cray_delete_tmpdir: execl of CLEANTMPCMD failed");
	}

	while (waitpid(child, &wstat, 0) == -1 && errno == EINTR)
		;
}

/*
 * Remove tmpdir on job termination.
 */
void
cray_job_termination_handler(int sig)
{
	int jid;
	char *login = NULL;
	struct jtab jtab;

	debug("received signal %d",sig);

	if ((jid = waitjob(&jtab)) == -1 ||
	    (login = uid2nam(jtab.j_uid)) == NULL)
		return;

	cray_delete_tmpdir(login, jid, jtab.j_uid);
}

/*
 * Set job id and create tmpdir directory.
 */
void
cray_init_job(struct passwd *pw)
{
	int jid;
	int c;

	jid = setjob(pw->pw_uid, WJSIGNAL);
	if (jid < 0)
		fatal("System call setjob failure");

	for (c = 'a'; c <= 'z'; c++) {
		snprintf(cray_tmpdir, TPATHSIZ, "%s/jtmp.%06d%c", JTMPDIR, jid, c);
		if (mkdir(cray_tmpdir, JTMPMODE) != 0)
			continue;
		if (chown(cray_tmpdir,	pw->pw_uid, pw->pw_gid) != 0) {
			rmdir(cray_tmpdir);
			continue;
		}
		break;
	}

	if (c > 'z')
		cray_tmpdir[0] = '\0';
}

void
cray_set_tmpdir(struct utmp *ut)
{
	int jid;
	struct jtab jbuf;

	if ((jid = getjtab(&jbuf)) < 0)
		return;

	/*
	 * Set jid and tmpdir in utmp record.
	 */
	ut->ut_jid = jid;
	strncpy(ut->ut_tpath, cray_tmpdir, TPATHSIZ);
}
#endif