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/*-
* Copyright (c) 2003-2004 Tim Kientzle
* 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
* in this position and unchanged.
* 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(S) ``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(S) 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 "archive_platform.h"
__FBSDID("$FreeBSD$");
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "archive.h"
#include "archive_private.h"
struct read_file_data {
int fd;
size_t block_size;
void *buffer;
mode_t st_mode; /* Mode bits for opened file. */
char filename[1]; /* Must be last! */
};
static int file_close(struct archive *, void *);
static int file_open(struct archive *, void *);
static ssize_t file_read(struct archive *, void *, const void **buff);
int
archive_read_open_file(struct archive *a, const char *filename,
size_t block_size)
{
struct read_file_data *mine;
if (filename == NULL || filename[0] == '\0') {
mine = malloc(sizeof(*mine));
if (mine == NULL) {
archive_set_error(a, ENOMEM, "No memory");
return (ARCHIVE_FATAL);
}
mine->filename[0] = '\0';
} else {
mine = malloc(sizeof(*mine) + strlen(filename));
if (mine == NULL) {
archive_set_error(a, ENOMEM, "No memory");
return (ARCHIVE_FATAL);
}
strcpy(mine->filename, filename);
}
mine->block_size = block_size;
mine->buffer = NULL;
mine->fd = -1;
return (archive_read_open(a, mine, file_open, file_read, file_close));
}
static int
file_open(struct archive *a, void *client_data)
{
struct read_file_data *mine = client_data;
struct stat st;
mine->buffer = malloc(mine->block_size);
if (mine->buffer == NULL) {
archive_set_error(a, ENOMEM, "No memory");
return (ARCHIVE_FATAL);
}
if (mine->filename[0] != '\0')
mine->fd = open(mine->filename, O_RDONLY);
else
mine->fd = 0; /* Fake "open" for stdin. */
if (mine->fd < 0) {
archive_set_error(a, errno, "Failed to open '%s'",
mine->filename);
return (ARCHIVE_FATAL);
}
if (fstat(mine->fd, &st) == 0) {
/* Set dev/ino of archive file so extract won't overwrite. */
a->skip_file_dev = st.st_dev;
a->skip_file_ino = st.st_ino;
/* Remember mode so close can decide whether to flush. */
mine->st_mode = st.st_mode;
} else {
if (mine->filename[0] == '\0')
archive_set_error(a, errno, "Can't stat stdin");
else
archive_set_error(a, errno, "Can't stat '%s'",
mine->filename);
return (ARCHIVE_FATAL);
}
return (0);
}
static ssize_t
file_read(struct archive *a, void *client_data, const void **buff)
{
struct read_file_data *mine = client_data;
ssize_t bytes_read;
(void)a; /* UNUSED */
*buff = mine->buffer;
bytes_read = read(mine->fd, mine->buffer, mine->block_size);
if (bytes_read < 0) {
if (mine->filename[0] == '\0')
archive_set_error(a, errno, "Error reading stdin");
else
archive_set_error(a, errno, "Error reading '%s'",
mine->filename);
}
return (bytes_read);
}
static int
file_close(struct archive *a, void *client_data)
{
struct read_file_data *mine = client_data;
(void)a; /* UNUSED */
/*
* Sometimes, we should flush the input before closing.
* Regular files: faster to just close without flush.
* Devices: must not flush (user might need to
* read the "next" item on a non-rewind device).
* Pipes and sockets: must flush (otherwise, the
* program feeding the pipe or socket may complain).
* Here, I flush everything except for regular files and
* device nodes.
*/
if (!S_ISREG(mine->st_mode)
&& !S_ISCHR(mine->st_mode)
&& !S_ISBLK(mine->st_mode)) {
ssize_t bytesRead;
do {
bytesRead = read(mine->fd, mine->buffer,
mine->block_size);
} while (bytesRead > 0);
}
/* If a named file was opened, then it needs to be closed. */
if (mine->filename[0] != '\0')
close(mine->fd);
if (mine->buffer != NULL)
free(mine->buffer);
free(mine);
return (ARCHIVE_OK);
}
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