posix_spawn_fileactions.c revision 1.2.2.3
1 1.2.2.2 yamt /*- 2 1.2.2.2 yamt * Copyright (c) 2008 Ed Schouten <ed (at) FreeBSD.org> 3 1.2.2.2 yamt * All rights reserved. 4 1.2.2.2 yamt * 5 1.2.2.2 yamt * Redistribution and use in source and binary forms, with or without 6 1.2.2.2 yamt * modification, are permitted provided that the following conditions 7 1.2.2.2 yamt * are met: 8 1.2.2.2 yamt * 1. Redistributions of source code must retain the above copyright 9 1.2.2.2 yamt * notice, this list of conditions and the following disclaimer. 10 1.2.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 11 1.2.2.2 yamt * notice, this list of conditions and the following disclaimer in the 12 1.2.2.2 yamt * documentation and/or other materials provided with the distribution. 13 1.2.2.2 yamt * 14 1.2.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 1.2.2.2 yamt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 1.2.2.2 yamt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 1.2.2.2 yamt * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 1.2.2.2 yamt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 1.2.2.2 yamt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 1.2.2.2 yamt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 1.2.2.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 1.2.2.2 yamt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 1.2.2.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 1.2.2.2 yamt * SUCH DAMAGE. 25 1.2.2.2 yamt */ 26 1.2.2.2 yamt 27 1.2.2.2 yamt #include <sys/cdefs.h> 28 1.2.2.3 yamt __RCSID("$NetBSD: posix_spawn_fileactions.c,v 1.2.2.3 2014/05/22 11:36:52 yamt Exp $"); 29 1.2.2.2 yamt 30 1.2.2.2 yamt #include "namespace.h" 31 1.2.2.2 yamt 32 1.2.2.2 yamt #include <errno.h> 33 1.2.2.2 yamt #include <fcntl.h> 34 1.2.2.2 yamt #include <sched.h> 35 1.2.2.2 yamt #include <signal.h> 36 1.2.2.2 yamt #include <stdlib.h> 37 1.2.2.2 yamt #include <string.h> 38 1.2.2.2 yamt #include <unistd.h> 39 1.2.2.2 yamt #include <spawn.h> 40 1.2.2.2 yamt 41 1.2.2.2 yamt #define MIN_SIZE 16 42 1.2.2.2 yamt 43 1.2.2.2 yamt /* 44 1.2.2.2 yamt * File descriptor actions 45 1.2.2.2 yamt */ 46 1.2.2.2 yamt 47 1.2.2.2 yamt int 48 1.2.2.2 yamt posix_spawn_file_actions_init(posix_spawn_file_actions_t *fa) 49 1.2.2.2 yamt { 50 1.2.2.2 yamt if (fa == NULL) 51 1.2.2.3 yamt return EINVAL; 52 1.2.2.2 yamt 53 1.2.2.2 yamt fa->fae = malloc(MIN_SIZE * sizeof(struct posix_spawn_file_actions_entry)); 54 1.2.2.2 yamt if (fa->fae == NULL) 55 1.2.2.3 yamt return ENOMEM; 56 1.2.2.2 yamt fa->size = MIN_SIZE; 57 1.2.2.2 yamt fa->len = 0; 58 1.2.2.2 yamt 59 1.2.2.3 yamt return 0; 60 1.2.2.2 yamt } 61 1.2.2.2 yamt 62 1.2.2.2 yamt int 63 1.2.2.2 yamt posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *fa) 64 1.2.2.2 yamt { 65 1.2.2.2 yamt unsigned int i; 66 1.2.2.2 yamt 67 1.2.2.2 yamt if (fa == NULL) 68 1.2.2.3 yamt return EINVAL; 69 1.2.2.2 yamt 70 1.2.2.2 yamt for (i = 0; i < fa->len; i++) { 71 1.2.2.2 yamt if (fa->fae[i].fae_action == FAE_OPEN) 72 1.2.2.2 yamt free(fa->fae[i].fae_path); 73 1.2.2.2 yamt } 74 1.2.2.2 yamt 75 1.2.2.2 yamt free(fa->fae); 76 1.2.2.3 yamt return 0; 77 1.2.2.2 yamt } 78 1.2.2.2 yamt 79 1.2.2.2 yamt static int 80 1.2.2.3 yamt posix_spawn_file_actions_getentry(posix_spawn_file_actions_t *fa, 81 1.2.2.3 yamt unsigned int *i) 82 1.2.2.2 yamt { 83 1.2.2.3 yamt posix_spawn_file_actions_entry_t *fae; 84 1.2.2.3 yamt 85 1.2.2.2 yamt if (fa == NULL) 86 1.2.2.3 yamt return EINVAL; 87 1.2.2.2 yamt 88 1.2.2.2 yamt if (fa->len < fa->size) 89 1.2.2.3 yamt goto out; 90 1.2.2.2 yamt 91 1.2.2.3 yamt fae = realloc(fa->fae, (fa->size + MIN_SIZE) * sizeof(*fa->fae)); 92 1.2.2.3 yamt if (fae == NULL) 93 1.2.2.3 yamt return ENOMEM; 94 1.2.2.2 yamt 95 1.2.2.3 yamt fa->fae = fae; 96 1.2.2.2 yamt fa->size += MIN_SIZE; 97 1.2.2.2 yamt 98 1.2.2.3 yamt out: 99 1.2.2.3 yamt *i = fa->len; 100 1.2.2.3 yamt return 0; 101 1.2.2.2 yamt } 102 1.2.2.2 yamt 103 1.2.2.2 yamt int 104 1.2.2.2 yamt posix_spawn_file_actions_addopen(posix_spawn_file_actions_t * __restrict fa, 105 1.2.2.2 yamt int fildes, const char * __restrict path, int oflag, mode_t mode) 106 1.2.2.2 yamt { 107 1.2.2.3 yamt char *faepath; 108 1.2.2.3 yamt unsigned int i; 109 1.2.2.3 yamt int error; 110 1.2.2.2 yamt 111 1.2.2.2 yamt if (fildes < 0) 112 1.2.2.3 yamt return EBADF; 113 1.2.2.2 yamt 114 1.2.2.3 yamt error = posix_spawn_file_actions_getentry(fa, &i); 115 1.2.2.3 yamt if (error) 116 1.2.2.3 yamt return error; 117 1.2.2.3 yamt 118 1.2.2.3 yamt faepath = strdup(path); 119 1.2.2.3 yamt if (faepath == NULL) 120 1.2.2.3 yamt return ENOMEM; 121 1.2.2.2 yamt 122 1.2.2.2 yamt fa->fae[i].fae_action = FAE_OPEN; 123 1.2.2.3 yamt fa->fae[i].fae_path = faepath; 124 1.2.2.2 yamt fa->fae[i].fae_fildes = fildes; 125 1.2.2.2 yamt fa->fae[i].fae_oflag = oflag; 126 1.2.2.2 yamt fa->fae[i].fae_mode = mode; 127 1.2.2.2 yamt fa->len++; 128 1.2.2.2 yamt 129 1.2.2.3 yamt return 0; 130 1.2.2.2 yamt } 131 1.2.2.2 yamt 132 1.2.2.2 yamt int 133 1.2.2.2 yamt posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa, 134 1.2.2.2 yamt int fildes, int newfildes) 135 1.2.2.2 yamt { 136 1.2.2.3 yamt unsigned int i; 137 1.2.2.3 yamt int error; 138 1.2.2.2 yamt 139 1.2.2.2 yamt if (fildes < 0 || newfildes < 0) 140 1.2.2.3 yamt return EBADF; 141 1.2.2.2 yamt 142 1.2.2.3 yamt error = posix_spawn_file_actions_getentry(fa, &i); 143 1.2.2.3 yamt if (error) 144 1.2.2.3 yamt return error; 145 1.2.2.2 yamt 146 1.2.2.2 yamt fa->fae[i].fae_action = FAE_DUP2; 147 1.2.2.2 yamt fa->fae[i].fae_fildes = fildes; 148 1.2.2.2 yamt fa->fae[i].fae_newfildes = newfildes; 149 1.2.2.2 yamt fa->len++; 150 1.2.2.2 yamt 151 1.2.2.3 yamt return 0; 152 1.2.2.2 yamt } 153 1.2.2.2 yamt 154 1.2.2.2 yamt int 155 1.2.2.2 yamt posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *fa, 156 1.2.2.2 yamt int fildes) 157 1.2.2.2 yamt { 158 1.2.2.3 yamt unsigned int i; 159 1.2.2.3 yamt int error; 160 1.2.2.2 yamt 161 1.2.2.2 yamt if (fildes < 0) 162 1.2.2.3 yamt return EBADF; 163 1.2.2.2 yamt 164 1.2.2.3 yamt error = posix_spawn_file_actions_getentry(fa, &i); 165 1.2.2.3 yamt if (error) 166 1.2.2.3 yamt return error; 167 1.2.2.2 yamt 168 1.2.2.2 yamt fa->fae[i].fae_action = FAE_CLOSE; 169 1.2.2.2 yamt fa->fae[i].fae_fildes = fildes; 170 1.2.2.2 yamt fa->len++; 171 1.2.2.2 yamt 172 1.2.2.3 yamt return 0; 173 1.2.2.2 yamt } 174
Indexes created Mon Sep 22 13:09:51 GMT 2025