Other helper routines. */
| 462 | |
| 463 | /* Other helper routines. */ |
| 464 | static int |
| 465 | ksem_create(struct thread *td, const char *name, semid_t *semidp, mode_t mode, |
| 466 | unsigned int value, int flags, int compat32) |
| 467 | { |
| 468 | struct pwddesc *pdp; |
| 469 | struct ksem *ks; |
| 470 | struct file *fp; |
| 471 | char *path; |
| 472 | const char *pr_path; |
| 473 | size_t pr_pathlen; |
| 474 | Fnv32_t fnv; |
| 475 | int error, fd; |
| 476 | |
| 477 | AUDIT_ARG_FFLAGS(flags); |
| 478 | AUDIT_ARG_MODE(mode); |
| 479 | AUDIT_ARG_VALUE(value); |
| 480 | |
| 481 | if (value > SEM_VALUE_MAX) |
| 482 | return (EINVAL); |
| 483 | |
| 484 | pdp = td->td_proc->p_pd; |
| 485 | mode = (mode & ~pdp->pd_cmask) & ACCESSPERMS; |
| 486 | error = falloc(td, &fp, &fd, O_CLOEXEC); |
| 487 | if (error) { |
| 488 | if (name == NULL) |
| 489 | error = ENOSPC; |
| 490 | return (error); |
| 491 | } |
| 492 | |
| 493 | /* |
| 494 | * Go ahead and copyout the file descriptor now. This is a bit |
| 495 | * premature, but it is a lot easier to handle errors as opposed |
| 496 | * to later when we've possibly created a new semaphore, etc. |
| 497 | */ |
| 498 | error = ksem_create_copyout_semid(td, semidp, fd, compat32); |
| 499 | if (error) { |
| 500 | fdclose(td, fp, fd); |
| 501 | fdrop(fp, td); |
| 502 | return (error); |
| 503 | } |
| 504 | |
| 505 | if (name == NULL) { |
| 506 | /* Create an anonymous semaphore. */ |
| 507 | ks = ksem_alloc(td->td_ucred, mode, value); |
| 508 | if (ks == NULL) |
| 509 | error = ENOSPC; |
| 510 | else |
| 511 | ks->ks_flags |= KS_ANONYMOUS; |
| 512 | } else { |
| 513 | path = malloc(MAXPATHLEN, M_KSEM, M_WAITOK); |
| 514 | pr_path = td->td_ucred->cr_prison->pr_path; |
| 515 | |
| 516 | /* Construct a full pathname for jailed callers. */ |
| 517 | pr_pathlen = strcmp(pr_path, "/") == 0 ? 0 |
| 518 | : strlcpy(path, pr_path, MAXPATHLEN); |
| 519 | error = copyinstr(name, path + pr_pathlen, |
| 520 | MAXPATHLEN - pr_pathlen, NULL); |
| 521 |
no test coverage detected