174 lines
3.8 KiB
C
174 lines
3.8 KiB
C
/*-
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* Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: posix_spawn_fileactions.c,v 1.4 2014/02/02 14:54:39 martin Exp $");
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#include "namespace.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <sched.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <spawn.h>
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#define MIN_SIZE 16
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/*
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* File descriptor actions
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*/
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int
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posix_spawn_file_actions_init(posix_spawn_file_actions_t *fa)
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{
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if (fa == NULL)
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return EINVAL;
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fa->fae = malloc(MIN_SIZE * sizeof(struct posix_spawn_file_actions_entry));
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if (fa->fae == NULL)
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return ENOMEM;
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fa->size = MIN_SIZE;
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fa->len = 0;
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return 0;
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}
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int
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posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *fa)
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{
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unsigned int i;
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if (fa == NULL)
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return EINVAL;
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for (i = 0; i < fa->len; i++) {
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if (fa->fae[i].fae_action == FAE_OPEN)
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free(fa->fae[i].fae_path);
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}
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free(fa->fae);
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return 0;
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}
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static int
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posix_spawn_file_actions_getentry(posix_spawn_file_actions_t *fa,
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unsigned int *i)
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{
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posix_spawn_file_actions_entry_t *fae;
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if (fa == NULL)
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return EINVAL;
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if (fa->len < fa->size)
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goto out;
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fae = realloc(fa->fae, (fa->size + MIN_SIZE) * sizeof(*fa->fae));
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if (fae == NULL)
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return ENOMEM;
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fa->fae = fae;
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fa->size += MIN_SIZE;
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out:
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*i = fa->len;
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return 0;
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}
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int
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posix_spawn_file_actions_addopen(posix_spawn_file_actions_t * __restrict fa,
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int fildes, const char * __restrict path, int oflag, mode_t mode)
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{
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char *faepath;
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unsigned int i;
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int error;
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if (fildes < 0)
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return EBADF;
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error = posix_spawn_file_actions_getentry(fa, &i);
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if (error)
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return error;
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faepath = strdup(path);
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if (faepath == NULL)
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return ENOMEM;
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fa->fae[i].fae_action = FAE_OPEN;
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fa->fae[i].fae_path = faepath;
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fa->fae[i].fae_fildes = fildes;
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fa->fae[i].fae_oflag = oflag;
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fa->fae[i].fae_mode = mode;
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fa->len++;
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return 0;
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}
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int
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posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa,
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int fildes, int newfildes)
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{
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unsigned int i;
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int error;
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if (fildes < 0 || newfildes < 0)
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return EBADF;
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error = posix_spawn_file_actions_getentry(fa, &i);
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if (error)
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return error;
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fa->fae[i].fae_action = FAE_DUP2;
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fa->fae[i].fae_fildes = fildes;
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fa->fae[i].fae_newfildes = newfildes;
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fa->len++;
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return 0;
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}
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int
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posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *fa,
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int fildes)
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{
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unsigned int i;
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int error;
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if (fildes < 0)
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return EBADF;
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error = posix_spawn_file_actions_getentry(fa, &i);
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if (error)
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return error;
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fa->fae[i].fae_action = FAE_CLOSE;
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fa->fae[i].fae_fildes = fildes;
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fa->len++;
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return 0;
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}
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