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#include <u.h>
#include <libc.h>
#include <auth.h>
/*
* become the authenticated user
*/
int
auth_chuid(AuthInfo *ai, char *ns)
{
int rv, fd;
if(ai == nil || ai->cap == nil){
werrstr("no capability");
return -1;
}
/* change uid */
fd = open("#¤/capuse", OWRITE);
if(fd < 0){
werrstr("opening #¤/capuse: %r");
return -1;
}
rv = write(fd, ai->cap, strlen(ai->cap));
close(fd);
if(rv < 0){
werrstr("writing %s to #¤/capuse: %r", ai->cap);
return -1;
}
/* get a link to factotum as new user */
fd = open("/srv/factotum", ORDWR);
if(fd >= 0)
mount(fd, -1, "/mnt", MREPL, "");
/* set up new namespace */
return newns(ai->cuid, ns);
}
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