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/* $Id: afssys.c,v 1.1 1995/12/14 06:52:46 tholo Exp $ */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <setjmp.h>
#include <errno.h>
#include <kerberosIV/krb.h>
#include <kerberosIV/kafs.h>
#include "afssysdefs.h"
#define AUTH_SUPERUSER "afs"
/*
* Here only ASCII characters are relevant.
*/
#define IsAsciiUpper(c) ('A' <= (c) && (c) <= 'Z')
#define ToAsciiLower(c) ((c) - 'A' + 'a')
static void
folddown(a, b)
char *a, *b;
{
for (; *b; a++, b++)
if (IsAsciiUpper(*b))
*a = ToAsciiLower(*b);
else
*a = *b;
*a = '\0';
}
#if !defined(linux) /* won't work there -- no SIGSYS, no syscall */
int
k_afsklog(realm)
char *realm;
{
int k_errno;
CREDENTIALS c;
KTEXT_ST ticket;
char username[256];
char krealm[REALM_SZ];
if (!k_hasafs())
return KSUCCESS;
if (realm == 0 || realm[0] == 0)
{
k_errno = krb_get_lrealm(krealm, 0);
if (k_errno != KSUCCESS)
return k_errno;
realm = krealm;
}
k_errno = krb_get_cred(AUTH_SUPERUSER, "", realm, &c);
if (k_errno != KSUCCESS)
{
k_errno = krb_mk_req(&ticket, AUTH_SUPERUSER, "", realm, 0);
if (k_errno == KSUCCESS)
k_errno = krb_get_cred(AUTH_SUPERUSER, "", realm, &c);
}
if (k_errno == KSUCCESS)
{
char cell[256];
struct ViceIoctl parms;
struct ClearToken ct;
int32_t sizeof_x;
char buf[2048], *t;
folddown(cell, realm);
/*
* Build a struct ClearToken
*/
ct.AuthHandle = c.kvno;
bcopy((char *)c.session, ct.HandShakeKey, sizeof(c.session));
ct.ViceId = getuid(); /* is this always valid? */
ct.BeginTimestamp = 1 + c.issue_date;
ct.EndTimestamp = krb_life_to_time(c.issue_date, c.lifetime);
t = buf;
/*
* length of secret token followed by secret token
*/
sizeof_x = c.ticket_st.length;
bcopy((char *)&sizeof_x, t, sizeof(sizeof_x));
t += sizeof(sizeof_x);
bcopy((char *)c.ticket_st.dat, t, sizeof_x);
t += sizeof_x;
/*
* length of clear token followed by clear token
*/
sizeof_x = sizeof(ct);
bcopy((char *)&sizeof_x, t, sizeof(sizeof_x));
t += sizeof(sizeof_x);
bcopy((char *)&ct, t, sizeof_x);
t += sizeof_x;
/*
* do *not* mark as primary cell
*/
sizeof_x = 0;
bcopy((char *)&sizeof_x, t, sizeof(sizeof_x));
t += sizeof(sizeof_x);
/*
* follow with cell name
*/
sizeof_x = strlen(cell) + 1;
bcopy(cell, t, sizeof_x);
t += sizeof_x;
/*
* Build argument block
*/
parms.in = buf;
parms.in_size = t - buf;
parms.out = 0;
parms.out_size = 0;
(void) k_pioctl(0, VIOCSETTOK, &parms, 0);
}
return k_errno;
}
#define NO_ENTRY_POINT 0
#define SINGLE_ENTRY_POINT 1
#define MULTIPLE_ENTRY_POINT 2
#define SINGLE_ENTRY_POINT2 3
#define AIX_ENTRY_POINTS 4
#define UNKNOWN_ENTRY_POINT 5
static int afs_entry_point = UNKNOWN_ENTRY_POINT;
int
k_pioctl(a_path, o_opcode, a_paramsP, a_followSymlinks)
char *a_path;
int o_opcode;
struct ViceIoctl *a_paramsP;
int a_followSymlinks;
{
#ifdef AFS_SYSCALL
if (afs_entry_point == SINGLE_ENTRY_POINT)
return syscall(AFS_SYSCALL, AFSCALL_PIOCTL,
a_path, o_opcode, a_paramsP, a_followSymlinks);
#endif
#ifdef AFS_PIOCTL
if (afs_entry_point == MULTIPLE_ENTRY_POINT)
return syscall(AFS_PIOCTL,
a_path, o_opcode, a_paramsP, a_followSymlinks);
#endif
#ifdef AFS_SYSCALL2
if (afs_entry_point == SINGLE_ENTRY_POINT2)
return syscall(AFS_SYSCALL2, AFSCALL_PIOCTL,
a_path, o_opcode, a_paramsP, a_followSymlinks);
#endif
#ifdef _AIX
if (afs_entry_point == AIX_ENTRY_POINTS)
return lpioctl(a_path, o_opcode, a_paramsP, a_followSymlinks);
#endif
errno = ENOSYS;
kill(getpid(), SIGSYS); /* You loose! */
return -1;
}
int
k_unlog()
{
struct ViceIoctl parms;
bzero((char *)&parms, sizeof(parms));
return k_pioctl(0, VIOCUNLOG, &parms, 0);
}
int
k_setpag()
{
#ifdef AFS_SYSCALL
if (afs_entry_point == SINGLE_ENTRY_POINT)
return syscall(AFS_SYSCALL, AFSCALL_SETPAG);
#endif
#ifdef AFS_SETPAG
if (afs_entry_point == MULTIPLE_ENTRY_POINT)
return syscall(AFS_SETPAG);
#endif
#ifdef AFS_SYSCALL2
if (afs_entry_point == SINGLE_ENTRY_POINT2)
return syscall(AFS_SYSCALL2, AFSCALL_SETPAG);
#endif
#ifdef _AIX
if (afs_entry_point == AIX_ENTRY_POINTS)
return lsetpag();
#endif
errno = ENOSYS;
kill(getpid(), SIGSYS); /* You loose! */
return -1;
}
#endif /* defined(linux) */
static jmp_buf catch_SIGSYS;
static void
SIGSYS_handler()
{
errno = 0;
longjmp(catch_SIGSYS, 1);
}
int
k_hasafs()
{
int saved_errno;
void (*saved_func)();
struct ViceIoctl parms;
#if defined(linux)
return 0;
#else
/*
* Already checked presence of AFS syscalls?
*/
if (afs_entry_point != UNKNOWN_ENTRY_POINT)
return afs_entry_point != NO_ENTRY_POINT;
/*
* Probe kernel for AFS specific syscalls,
* they (currently) come in two flavors.
* If the syscall is absent we recive a SIGSYS.
*/
afs_entry_point = NO_ENTRY_POINT;
bzero(&parms, sizeof(parms));
saved_errno = errno;
saved_func = signal(SIGSYS, SIGSYS_handler);
#ifdef AFS_SYSCALL
if (setjmp(catch_SIGSYS) == 0)
{
syscall(AFS_SYSCALL, AFSCALL_PIOCTL,
0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (errno == EINVAL)
{
afs_entry_point = SINGLE_ENTRY_POINT;
goto done;
}
}
#endif /* AFS_SYSCALL */
#ifdef AFS_PIOCTL
if (setjmp(catch_SIGSYS) == 0)
{
syscall(AFS_PIOCTL,
0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (errno == EINVAL)
{
afs_entry_point = MULTIPLE_ENTRY_POINT;
goto done;
}
}
#endif /* AFS_PIOCTL */
#ifdef AFS_SYSCALL2
if (setjmp(catch_SIGSYS) == 0)
{
syscall(AFS_SYSCALL2, AFSCALL_PIOCTL,
0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (errno == EINVAL)
{
afs_entry_point = SINGLE_ENTRY_POINT2;
goto done;
}
}
#endif /* AFS_SYSCALL */
#ifdef _AIX
if (setjmp(catch_SIGSYS) == 0)
{
lpioctl(0, 0, 0, 0);
if (errno == EINVAL)
{
afs_entry_point = AIX_ENTRY_POINTS;
goto done;
}
}
#endif
done:
(void) signal(SIGSYS, saved_func);
errno = saved_errno;
return afs_entry_point != NO_ENTRY_POINT;
#endif /* linux */
}
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