1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2018 Mariusz Zaborski <oshogbo@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _FILEARGS_H_ 30 #define _FILEARGS_H_ 31 32 #include <sys/cdefs.h> 33 #include <sys/dnv.h> 34 #include <sys/nv.h> 35 36 #include <stdbool.h> 37 38 #define FA_OPEN 1 39 #define FA_LSTAT 2 40 #define FA_REALPATH 4 41 42 #ifdef WITH_CASPER 43 struct fileargs; 44 typedef struct fileargs fileargs_t; 45 struct stat; 46 47 __BEGIN_DECLS 48 49 fileargs_t *fileargs_init(int argc, char *argv[], int flags, mode_t mode, 50 cap_rights_t *rightsp, int operations); 51 fileargs_t *fileargs_cinit(cap_channel_t *cas, int argc, char *argv[], 52 int flags, mode_t mode, cap_rights_t *rightsp, int operations); 53 fileargs_t *fileargs_initnv(nvlist_t *limits); 54 fileargs_t *fileargs_cinitnv(cap_channel_t *cas, nvlist_t *limits); 55 int fileargs_lstat(fileargs_t *fa, const char *name, struct stat *sb); 56 int fileargs_open(fileargs_t *fa, const char *name); 57 char *fileargs_realpath(fileargs_t *fa, const char *pathname, 58 char *reserved_path); 59 void fileargs_free(fileargs_t *fa); 60 FILE *fileargs_fopen(fileargs_t *fa, const char *name, const char *mode); 61 62 fileargs_t *fileargs_wrap(cap_channel_t *chan, int fdflags); 63 cap_channel_t *fileargs_unwrap(fileargs_t *fa, int *fdflags); 64 65 __END_DECLS 66 67 #else 68 typedef struct fileargs { 69 int fa_flags; 70 mode_t fa_mode; 71 } fileargs_t; 72 73 static inline fileargs_t * 74 fileargs_init(int argc __unused, char *argv[] __unused, int flags, mode_t mode, 75 cap_rights_t *rightsp __unused, int operations __unused) { 76 fileargs_t *fa; 77 78 fa = malloc(sizeof(*fa)); 79 if (fa != NULL) { 80 fa->fa_flags = flags; 81 fa->fa_mode = mode; 82 } 83 84 return (fa); 85 } 86 87 static inline fileargs_t * 88 fileargs_cinit(cap_channel_t *cas __unused, int argc, char *argv[], int flags, 89 mode_t mode, cap_rights_t *rightsp, int operations) 90 { 91 92 return (fileargs_init(argc, argv, flags, mode, rightsp, operations)); 93 } 94 95 static inline fileargs_t * 96 fileargs_initnv(nvlist_t *limits) 97 { 98 fileargs_t *fa; 99 100 fa = fileargs_init(0, NULL, 101 nvlist_get_number(limits, "flags"), 102 dnvlist_get_number(limits, "mode", 0), 103 NULL, 104 nvlist_get_number(limits, "operations")); 105 nvlist_destroy(limits); 106 107 return (fa); 108 } 109 110 static inline fileargs_t * 111 fileargs_cinitnv(cap_channel_t *cas __unused, nvlist_t *limits) 112 { 113 114 return (fileargs_initnv(limits)); 115 } 116 117 #define fileargs_lstat(fa, name, sb) \ 118 lstat(name, sb) 119 #define fileargs_open(fa, name) \ 120 open(name, fa->fa_flags, fa->fa_mode) 121 #define fileargs_realpath(fa, pathname, reserved_path) \ 122 realpath(pathname, reserved_path) 123 124 static inline 125 FILE *fileargs_fopen(fileargs_t *fa, const char *name, const char *mode) 126 { 127 (void) fa; 128 return (fopen(name, mode)); 129 } 130 #define fileargs_free(fa) (free(fa)) 131 132 static inline fileargs_t * 133 fileargs_wrap(cap_channel_t *chan, int fdflags) 134 { 135 136 cap_close(chan); 137 return (fileargs_init(0, NULL, fdflags, 0, NULL, 0)); 138 } 139 140 static inline cap_channel_t * 141 fileargs_unwrap(fileargs_t *fa, int *fdflags) 142 { 143 144 if (fdflags != NULL) { 145 *fdflags = fa->fa_flags; 146 } 147 fileargs_free(fa); 148 return (cap_init()); 149 } 150 151 #endif 152 153 #endif /* !_FILEARGS_H_ */ 154