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#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include <authsrv.h>
char *eve;
char hostdomain[DOMLEN];
/*
* return true if current user is eve
*/
int
iseve(void)
{
return strcmp(eve, up->user) == 0;
}
uintptr
sysfversion(va_list list)
{
int msize, arglen, fd;
char *vers;
Chan *c;
fd = va_arg(list, int);
msize = va_arg(list, int);
vers = va_arg(list, char*);
arglen = va_arg(list, int);
validaddr((uintptr)vers, arglen, 1);
/* check there's a NUL in the version string */
if(arglen <= 0 || memchr(vers, 0, arglen) == nil)
error(Ebadarg);
c = fdtochan(fd, ORDWR, 0, 1);
if(waserror()){
cclose(c);
nexterror();
}
msize = mntversion(c, vers, msize, arglen);
cclose(c);
poperror();
return msize;
}
uintptr
sys_fsession(va_list list)
{
int fd;
char *str;
uint len;
/* deprecated; backwards compatibility only */
fd = va_arg(list, int);
str = va_arg(list, char*);
len = va_arg(list, uint);
if(len == 0)
error(Ebadarg);
validaddr((uintptr)str, len, 1);
*str = '\0';
USED(fd);
return 0;
}
uintptr
sysfauth(va_list list)
{
Chan *c, *ac;
char *aname;
int fd;
fd = va_arg(list, int);
aname = va_arg(list, char*);
validaddr((uintptr)aname, 1, 0);
aname = validnamedup(aname, 1);
if(waserror()){
free(aname);
nexterror();
}
c = fdtochan(fd, ORDWR, 0, 1);
if(waserror()){
cclose(c);
nexterror();
}
ac = mntauth(c, aname);
/* at this point ac is responsible for keeping c alive */
poperror(); /* c */
cclose(c);
poperror(); /* aname */
free(aname);
if(waserror()){
cclose(ac);
nexterror();
}
fd = newfd(ac);
if(fd < 0)
error(Enofd);
poperror(); /* ac */
/* always mark it close on exec */
ac->flag |= CCEXEC;
return (uintptr)fd;
}
/*
* called by devcons() for user device
*
* anyone can become none
*/
long
userwrite(char *a, int n)
{
if(n!=4 || strncmp(a, "none", 4)!=0)
error(Eperm);
kstrdup(&up->user, "none");
up->basepri = PriNormal;
return n;
}
/*
* called by devcons() for host owner/domain
*
* writing hostowner also sets user
*/
long
hostownerwrite(char *a, int n)
{
char buf[128];
if(!iseve())
error(Eperm);
if(n <= 0 || n >= sizeof buf)
error(Ebadarg);
memmove(buf, a, n);
buf[n] = 0;
renameuser(eve, buf);
srvrenameuser(eve, buf);
shrrenameuser(eve, buf);
kstrdup(&eve, buf);
kstrdup(&up->user, buf);
up->basepri = PriNormal;
return n;
}
long
hostdomainwrite(char *a, int n)
{
char buf[DOMLEN];
if(!iseve())
error(Eperm);
if(n <= 0 || n >= DOMLEN)
error(Ebadarg);
memset(buf, 0, DOMLEN);
strncpy(buf, a, n);
if(buf[0] == 0)
error(Ebadarg);
memmove(hostdomain, buf, DOMLEN);
return n;
}
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