1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 23 #include <libzfs.h> 24 25 #include "libzfs_impl.h" 26 27 #ifndef F_SETPIPE_SZ 28 #define F_SETPIPE_SZ (F_SETLEASE + 7) 29 #endif /* F_SETPIPE_SZ */ 30 31 #ifndef F_GETPIPE_SZ 32 #define F_GETPIPE_SZ (F_GETLEASE + 7) 33 #endif /* F_GETPIPE_SZ */ 34 35 void libzfs_set_pipe_max(int infd)36libzfs_set_pipe_max(int infd) 37 { 38 FILE *procf = fopen("/proc/sys/fs/pipe-max-size", "r"); 39 40 if (procf != NULL) { 41 unsigned long max_psize; 42 long cur_psize; 43 if (fscanf(procf, "%lu", &max_psize) > 0) { 44 cur_psize = fcntl(infd, F_GETPIPE_SZ); 45 if (cur_psize > 0 && 46 max_psize > (unsigned long) cur_psize) 47 fcntl(infd, F_SETPIPE_SZ, 48 max_psize); 49 } 50 fclose(procf); 51 } 52 } 53