ref: 556618eb07d1ac6e2c629a60acd53c45d53261be
dir: /sys/src/9/port/auth.c/
#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(); } /* always mark it close on exec */ fd = newfd(ac, OCEXEC); if(fd < 0) error(Enofd); poperror(); /* ac */ 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); procsetuser("none"); return n; } /* * called by devcons() for host owner/domain * * writing hostowner also sets user */ long hostownerwrite(char *a, int n) { char buf[KNAMELEN]; if(!iseve()) error(Eperm); if(n <= 0) error(Ebadarg); if(n >= sizeof buf) error(Etoolong); memmove(buf, a, n); buf[n] = 0; renameuser(eve, buf); srvrenameuser(eve, buf); shrrenameuser(eve, buf); kstrdup(&eve, buf); procsetuser(buf); 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; }