usr/src/lib/libcmdutils/libcmdutils.h

   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  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 /*
  26  * Copyright (c) 2013 RackTop Systems.
  27  */
  28 /*
  29  * Copyright 2017 Joyent, Inc.
  30  */
  31
  32 /*
  33  * Declarations for the functions in libcmdutils.
  34  */
  35
  36 #ifndef _LIBCMDUTILS_H
  37 #define _LIBCMDUTILS_H
  38
  39 #if !defined(_LP64) && \
  40         !((_FILE_OFFSET_BITS == 64) || defined(_LARGEFILE64_SOURCE))
  41 #error "libcmdutils.h can only be used in a largefile compilation environment"
  42 #endif
  43
  44 /*
  45  * This is a private header file.  Applications should not directly include
  46  * this file.
  47  */
  48
  49 #include <stdio.h>
  50 #include <unistd.h>
  51 #include <stdlib.h>
  52 #include <stdarg.h>
  53 #include <errno.h>
  54 #include <fcntl.h>
  55 #include <limits.h>
  56 #include <libintl.h>
  57 #include <string.h>
  58 #include <dirent.h>
  59 #include <attr.h>
  60 #include <sys/avl.h>
  61 #include <sys/types.h>
  62 #include <sys/stat.h>
  63 #include <sys/mman.h>
  64 #include <libnvpair.h>
  65
  66 #ifdef  __cplusplus
  67 extern "C" {
  68 #endif
  69
  70 /* extended system attribute support */
  71 #define _NOT_SATTR      0
  72 #define _RO_SATTR       1
  73 #define _RW_SATTR       2
  74
  75 #define MAXMAPSIZE      (1024*1024*8)   /* map at most 8MB */
  76 #define SMALLFILESIZE   (32*1024)       /* don't use mmap on little file */
  77
  78 /* Type used for a node containing a device id and inode number */
  79
  80 #if defined(_LP64) || (_FILE_OFFSET_BITS == 64)
  81 typedef struct tree_node {
  82         dev_t           node_dev;
  83         ino_t           node_ino;
  84         avl_node_t      avl_link;
  85 } tree_node_t;
  86 #else
  87 typedef struct tree_node {
  88         dev_t           node_dev;
  89         ino64_t         node_ino;
  90         avl_node_t      avl_link;
  91 } tree_node_t;
  92 #endif
  93
  94                 /* extended system attribute support */
  95
  96 /* Determine if a file is the name of an extended system attribute file */
  97 extern int sysattr_type(char *);
  98
  99 /* Determine if the underlying file system supports system attributes */
 100 extern int sysattr_support(char *, int);
 101
 102 /* Copies the content of the source file to the target file */
 103 #if defined(_LP64) || (_FILE_OFFSET_BITS == 64)
 104 extern int writefile(int, int, char *, char *, char *, char *,
 105         struct stat *, struct stat *);
 106 #else
 107 extern int writefile(int, int, char *, char *, char *, char *,
 108         struct stat64 *, struct stat64 *);
 109 #endif
 110
 111 /* Gets file descriptors of the source and target attribute files */
 112 extern int get_attrdirs(int, int, char *, int *, int *);
 113
 114 /* Move extended attribute and extended system attribute */
 115 extern int mv_xattrs(char *, char *, char *, int, int);
 116
 117 /* Returns non default extended system attribute list */
 118 extern nvlist_t *sysattr_list(char *, int, char *);
 119
 120
 121
 122                 /* avltree */
 123
 124 /*
 125  * Used to compare two nodes.  We are attempting to match the 1st
 126  * argument (node) against the 2nd argument (a node which
 127  * is already in the search tree).
 128  */
 129
 130 extern int tnode_compare(const void *, const void *);
 131
 132 /*
 133  * Used to add a single node (containing the input device id and
 134  * inode number) to the specified search tree.  The calling
 135  * application must set the tree pointer to NULL before calling
 136  * add_tnode() for the first time.
 137  */
 138 #if defined(_LP64) || (_FILE_OFFSET_BITS == 64)
 139 extern int add_tnode(avl_tree_t **, dev_t, ino_t);
 140 #else
 141 extern int add_tnode(avl_tree_t **, dev_t, ino64_t);
 142 #endif
 143
 144 /*
 145  * Used to destroy a whole tree (all nodes) without rebalancing.
 146  * The calling application is responsible for setting the tree
 147  * pointer to NULL upon return.
 148  */
 149 extern void destroy_tree(avl_tree_t *);
 150
 151
 152
 153                 /* user/group id helpers */
 154
 155 /*
 156  * Used to get the next available user id in given range.
 157  */
 158 extern int findnextuid(uid_t, uid_t, uid_t *);
 159
 160 /*
 161  * Used to get the next available group id in given range.
 162  */
 163 extern int findnextgid(gid_t, gid_t, gid_t *);
 164
 165
 166
 167                 /* dynamic string utilities */
 168
 169 typedef struct custr custr_t;
 170
 171 /*
 172  * Allocate and free a "custr_t" dynamic string object.  Returns 0 on success
 173  * and -1 otherwise.
 174  */
 175 extern int custr_alloc(custr_t **);
 176 extern void custr_free(custr_t *);
 177
 178 /*
 179  * Allocate a "custr_t" dynamic string object that operates on a fixed external
 180  * buffer.
 181  */
 182 extern int custr_alloc_buf(custr_t **, void *, size_t);
 183
 184 /*
 185  * Append a single character, or a NUL-terminated string of characters, to a
 186  * dynamic string.  Returns 0 on success and -1 otherwise.  The dynamic string
 187  * will be unmodified if the function returns -1.
 188  */
 189 extern int custr_appendc(custr_t *, char);
 190 extern int custr_append(custr_t *, const char *);
 191
 192 /*
 193  * Append a format string and arguments as though the contents were being parsed
 194  * through snprintf. Returns 0 on success and -1 otherwise.  The dynamic string
 195  * will be unmodified if the function returns -1.
 196  */
 197 extern int custr_append_printf(custr_t *, const char *, ...);
 198 extern int custr_append_vprintf(custr_t *, const char *, va_list);
 199
 200 /*
 201  * Determine the length in bytes, not including the NUL terminator, of the
 202  * dynamic string.
 203  */
 204 extern size_t custr_len(custr_t *);
 205
 206 /*
 207  * Clear the contents of a dynamic string.  Does not free the underlying
 208  * memory.
 209  */
 210 extern void custr_reset(custr_t *);
 211
 212 /*
 213  * Retrieve a const pointer to a NUL-terminated string version of the contents
 214  * of the dynamic string.  Storage for this string should not be freed, and
 215  * the pointer will be invalidated by any mutations to the dynamic string.
 216  */
 217 extern const char *custr_cstr(custr_t *str);
 218
 219 #ifdef  __cplusplus
 220 }
 221 #endif
 222
 223 #endif /* _LIBCMDUTILS_H */