sys/kern/uipc_sem.c

117 static int	ksem_create(struct thread *td, const char *path,
124 static void	ksem_insert(char *path, Fnv32_t fnv, struct ksem *ks);
125 static struct ksem *ksem_lookup(char *path, Fnv32_t fnv);
128 static int	ksem_remove(char *path, Fnv32_t fnv, struct ucred *ucred);
262 	const char *path, *pr_path;
275 			path = ks->ks_path;
280 				if (strncmp(path, pr_path, pr_pathlen) == 0 &&
281 				    path[pr_pathlen] == '/')
282 					path += pr_pathlen;
284 			strlcpy(kif->kf_path, path, sizeof(kif->kf_path));
366  * paths to semaphore objects.  We use the FNV hash on the path to
370 ksem_lookup(char *path, Fnv32_t fnv)
377 		if (strcmp(map->km_path, path) == 0)
385 ksem_insert(char *path, Fnv32_t fnv, struct ksem *ks)
390 	map->km_path = path;
393 	ks->ks_path = path;
398 ksem_remove(char *path, Fnv32_t fnv, struct ucred *ucred)
406 		if (strcmp(map->km_path, path) == 0) {
464 	char *path;
502 		path = malloc(MAXPATHLEN, M_KSEM, M_WAITOK);
507 		    : strlcpy(path, pr_path, MAXPATHLEN);
508 		error = copyinstr(name, path + pr_pathlen,
512 		if (error == 0 && path[pr_pathlen] != '/')
517 			free(path, M_KSEM);
521 		fnv = fnv_32_str(path, FNV1_32_INIT);
523 		ks = ksem_lookup(path, fnv);
531 					ksem_insert(path, fnv, ks);
532 					path = NULL;
560 		if (path)
561 			free(path, M_KSEM);
647 	char *path;
653 	path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
656 	    : strlcpy(path, pr_path, MAXPATHLEN);
657 	error = copyinstr(uap->name, path + pr_pathlen, MAXPATHLEN - pr_pathlen,
660 		free(path, M_TEMP);
664 	fnv = fnv_32_str(path, FNV1_32_INIT);
666 	error = ksem_remove(path, fnv, td->td_ucred);
668 	free(path, M_TEMP);