NetBSD/lib/libc/gen/posix_spawn_fileactions.c

174 lines
3.8 KiB
C

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