17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate * 227c478bd9Sstevel@tonic-gate * Copyright 1997 Sun Microsystems, Inc. All rights reserved. 237c478bd9Sstevel@tonic-gate * Use is subject to license terms. 247c478bd9Sstevel@tonic-gate */ 257c478bd9Sstevel@tonic-gate 267c478bd9Sstevel@tonic-gate #ifndef _SYS_PATHCONF_H 277c478bd9Sstevel@tonic-gate #define _SYS_PATHCONF_H 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate /* pathconf.h 1.9 89/06/26 SMI */ 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate #include <sys/unistd.h> 327c478bd9Sstevel@tonic-gate #include <sys/types.h> 337c478bd9Sstevel@tonic-gate 347c478bd9Sstevel@tonic-gate #ifdef __cplusplus 357c478bd9Sstevel@tonic-gate extern "C" { 367c478bd9Sstevel@tonic-gate #endif 377c478bd9Sstevel@tonic-gate 387c478bd9Sstevel@tonic-gate /* 397c478bd9Sstevel@tonic-gate * POSIX pathconf information 407c478bd9Sstevel@tonic-gate * 417c478bd9Sstevel@tonic-gate * static pathconf kludge notes: 427c478bd9Sstevel@tonic-gate * For NFSv2 servers, we've added a vop (vop_cntl) to dig out pathconf 437c478bd9Sstevel@tonic-gate * information. The mount program asked for the information from 447c478bd9Sstevel@tonic-gate * a remote mountd daemon. If it gets it, it passes the info 457c478bd9Sstevel@tonic-gate * down in a new args field. The info is passed in the struct below 467c478bd9Sstevel@tonic-gate * in nfsargs.pathconf. There's a new NFS mount flag so that you know 477c478bd9Sstevel@tonic-gate * this is happening. NFS stores the information locally; when a 487c478bd9Sstevel@tonic-gate * pathconf request is made, the request is intercepted at the client 497c478bd9Sstevel@tonic-gate * and the information is retrieved from the struct passed down by 507c478bd9Sstevel@tonic-gate * mount. It's a kludge that will go away as soon 517c478bd9Sstevel@tonic-gate * as we can ask the nfs protocol these sorts of questions (NFSr3). 527c478bd9Sstevel@tonic-gate * All code is noted by "static pathconf kludge" comments and is 537c478bd9Sstevel@tonic-gate * restricted to nfs code in the kernel. 547c478bd9Sstevel@tonic-gate */ 557c478bd9Sstevel@tonic-gate 567c478bd9Sstevel@tonic-gate #define _BITS (8 * sizeof (short)) 577c478bd9Sstevel@tonic-gate #define _PC_N ((_PC_LAST + _BITS - 1) / _BITS) 587c478bd9Sstevel@tonic-gate #define _PC_ISSET(n, a) (a[(n) / _BITS] & (1 << ((n) % _BITS))) 597c478bd9Sstevel@tonic-gate #define _PC_SET(n, a) (a[(n) / _BITS] |= (1 << ((n) % _BITS))) 607c478bd9Sstevel@tonic-gate #define _PC_ERROR 0 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate struct pathcnf { 637c478bd9Sstevel@tonic-gate /* 647c478bd9Sstevel@tonic-gate * pathconf() information 657c478bd9Sstevel@tonic-gate */ 667c478bd9Sstevel@tonic-gate int pc_link_max; /* max links allowed */ 677c478bd9Sstevel@tonic-gate short pc_max_canon; /* max line len for a tty */ 687c478bd9Sstevel@tonic-gate short pc_max_input; /* input a tty can eat all once */ 697c478bd9Sstevel@tonic-gate short pc_name_max; /* max file name length (dir entry) */ 707c478bd9Sstevel@tonic-gate short pc_path_max; /* path name len (/x/y/z/...) */ 717c478bd9Sstevel@tonic-gate short pc_pipe_buf; /* size of a pipe (bytes) */ 727c478bd9Sstevel@tonic-gate uchar_t pc_vdisable; /* safe char to turn off c_cc[i] */ 737c478bd9Sstevel@tonic-gate char pc_xxx; /* alignment padding; cc_t == char */ 747c478bd9Sstevel@tonic-gate short pc_mask[_PC_N]; /* see below */ 757c478bd9Sstevel@tonic-gate #ifdef _KERNEL 767c478bd9Sstevel@tonic-gate short pc_refcnt; /* number of mounts that use this */ 777c478bd9Sstevel@tonic-gate struct pathcnf *pc_next; /* linked list */ 787c478bd9Sstevel@tonic-gate #endif 797c478bd9Sstevel@tonic-gate }; 807c478bd9Sstevel@tonic-gate 817c478bd9Sstevel@tonic-gate #ifdef _SYSCALL32 827c478bd9Sstevel@tonic-gate struct pathcnf32 { 837c478bd9Sstevel@tonic-gate /* 847c478bd9Sstevel@tonic-gate * pathconf() information 857c478bd9Sstevel@tonic-gate */ 867c478bd9Sstevel@tonic-gate int32_t pc_link_max; /* max links allowed */ 877c478bd9Sstevel@tonic-gate int16_t pc_max_canon; /* max line len for a tty */ 887c478bd9Sstevel@tonic-gate int16_t pc_max_input; /* input a tty can eat all once */ 897c478bd9Sstevel@tonic-gate int16_t pc_name_max; /* max file name length (dir entry) */ 907c478bd9Sstevel@tonic-gate int16_t pc_path_max; /* path name len (/x/y/z/...) */ 917c478bd9Sstevel@tonic-gate int16_t pc_pipe_buf; /* size of a pipe (bytes) */ 927c478bd9Sstevel@tonic-gate uint8_t pc_vdisable; /* safe char to turn off c_cc[i] */ 937c478bd9Sstevel@tonic-gate int8_t pc_xxx; /* alignment padding; cc_t == char */ 947c478bd9Sstevel@tonic-gate int16_t pc_mask[_PC_N]; /* see below */ 957c478bd9Sstevel@tonic-gate #ifdef _KERNEL 967c478bd9Sstevel@tonic-gate int16_t pc_refcnt; /* number of mounts that use this */ 977c478bd9Sstevel@tonic-gate caddr32_t pc_next; /* linked list */ 987c478bd9Sstevel@tonic-gate #endif 997c478bd9Sstevel@tonic-gate }; 1007c478bd9Sstevel@tonic-gate #endif /* _SYSCALL32 */ 1017c478bd9Sstevel@tonic-gate 1027c478bd9Sstevel@tonic-gate /* 1037c478bd9Sstevel@tonic-gate * pc_mask is used to encode either 1047c478bd9Sstevel@tonic-gate * a) boolean values (for chown_restricted and no_trunc) 1057c478bd9Sstevel@tonic-gate * b) errno on/off (for link, canon, input, name, path, and pipe) 1067c478bd9Sstevel@tonic-gate * The _PC_XXX values are defined in unistd.h; they start at 1 and go up 1077c478bd9Sstevel@tonic-gate * sequentially. 1087c478bd9Sstevel@tonic-gate * _PC_ERROR is used as the first bit to indicate total failure 1097c478bd9Sstevel@tonic-gate * (all info invalid). 1107c478bd9Sstevel@tonic-gate * To check for an error something like 1117c478bd9Sstevel@tonic-gate * _PC_ISSET(_PC_PATHMAX, foo.pc_mask) != 0 1127c478bd9Sstevel@tonic-gate * is used. 1137c478bd9Sstevel@tonic-gate */ 1147c478bd9Sstevel@tonic-gate 1157c478bd9Sstevel@tonic-gate /* 1167c478bd9Sstevel@tonic-gate * The size of the non-kernel part of the struct. 1177c478bd9Sstevel@tonic-gate */ 1187c478bd9Sstevel@tonic-gate #ifdef _KERNEL 119*ad9a7bd3SRichard Lowe #define PCSIZ ((size_t)(&(((struct pathcnf *)0)->pc_refcnt))) 1207c478bd9Sstevel@tonic-gate #define PCCMP(p1, p2) bcmp((char *)p1, (char *)p2, PCSIZ) 1217c478bd9Sstevel@tonic-gate #endif 1227c478bd9Sstevel@tonic-gate 1237c478bd9Sstevel@tonic-gate #ifdef __cplusplus 1247c478bd9Sstevel@tonic-gate } 1257c478bd9Sstevel@tonic-gate #endif 1267c478bd9Sstevel@tonic-gate 1277c478bd9Sstevel@tonic-gate #endif /* _SYS_PATHCONF_H */ 128