diff options
Diffstat (limited to 'lib/libarchive/archive_read_open_filename.c')
| -rw-r--r-- | lib/libarchive/archive_read_open_filename.c | 272 |
1 files changed, 0 insertions, 272 deletions
diff --git a/lib/libarchive/archive_read_open_filename.c b/lib/libarchive/archive_read_open_filename.c deleted file mode 100644 index 3d6c5dc..0000000 --- a/lib/libarchive/archive_read_open_filename.c +++ /dev/null @@ -1,272 +0,0 @@ -/*- - * Copyright (c) 2003-2007 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. - * 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("$FreeBSD$"); - -#ifdef HAVE_SYS_STAT_H -#include <sys/stat.h> -#endif -#ifdef HAVE_ERRNO_H -#include <errno.h> -#endif -#ifdef HAVE_FCNTL_H -#include <fcntl.h> -#endif -#ifdef HAVE_IO_H -#include <io.h> -#endif -#ifdef HAVE_STDLIB_H -#include <stdlib.h> -#endif -#ifdef HAVE_STRING_H -#include <string.h> -#endif -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#include "archive.h" - -#ifndef O_BINARY -#define O_BINARY 0 -#endif - -struct read_file_data { - int fd; - size_t block_size; - void *buffer; - mode_t st_mode; /* Mode bits for opened file. */ - char can_skip; /* This file supports skipping. */ - char filename[1]; /* Must be last! */ -}; - -static int file_close(struct archive *, void *); -static ssize_t file_read(struct archive *, void *, const void **buff); -#if ARCHIVE_API_VERSION < 2 -static ssize_t file_skip(struct archive *, void *, size_t request); -#else -static off_t file_skip(struct archive *, void *, off_t request); -#endif - -int -archive_read_open_file(struct archive *a, const char *filename, - size_t block_size) -{ - return (archive_read_open_filename(a, filename, block_size)); -} - -int -archive_read_open_filename(struct archive *a, const char *filename, - size_t block_size) -{ - struct stat st; - struct read_file_data *mine; - void *b; - int fd; - - archive_clear_error(a); - if (filename == NULL || filename[0] == '\0') { - /* We used to invoke archive_read_open_fd(a,0,block_size) - * here, but that doesn't (and shouldn't) handle the - * end-of-file flush when reading stdout from a pipe. - * Basically, read_open_fd() is intended for folks who - * are willing to handle such details themselves. This - * API is intended to be a little smarter for folks who - * want easy handling of the common case. - */ - filename = ""; /* Normalize NULL to "" */ - fd = 0; -#if defined(__CYGWIN__) || defined(_WIN32) - setmode(0, O_BINARY); -#endif - } else { - fd = open(filename, O_RDONLY | O_BINARY); - if (fd < 0) { - archive_set_error(a, errno, - "Failed to open '%s'", filename); - return (ARCHIVE_FATAL); - } - } - if (fstat(fd, &st) != 0) { - archive_set_error(a, errno, "Can't stat '%s'", filename); - return (ARCHIVE_FATAL); - } - - mine = (struct read_file_data *)calloc(1, - sizeof(*mine) + strlen(filename)); - b = malloc(block_size); - if (mine == NULL || b == NULL) { - archive_set_error(a, ENOMEM, "No memory"); - free(mine); - free(b); - return (ARCHIVE_FATAL); - } - strcpy(mine->filename, filename); - mine->block_size = block_size; - mine->buffer = b; - mine->fd = fd; - /* Remember mode so close can decide whether to flush. */ - mine->st_mode = st.st_mode; - /* If we're reading a file from disk, ensure that we don't - overwrite it with an extracted file. */ - if (S_ISREG(st.st_mode)) { - archive_read_extract_set_skip_file(a, st.st_dev, st.st_ino); - /* - * Enabling skip here is a performance optimization - * for anything that supports lseek(). On FreeBSD - * (and probably many other systems), only regular - * files and raw disk devices support lseek() (on - * other input types, lseek() returns success but - * doesn't actually change the file pointer, which - * just completely screws up the position-tracking - * logic). In addition, I've yet to find a portable - * way to determine if a device is a raw disk device. - * So I don't see a way to do much better than to only - * enable this optimization for regular files. - */ - mine->can_skip = 1; - } - return (archive_read_open2(a, mine, - NULL, file_read, file_skip, file_close)); -} - -static ssize_t -file_read(struct archive *a, void *client_data, const void **buff) -{ - struct read_file_data *mine = (struct read_file_data *)client_data; - ssize_t bytes_read; - - *buff = mine->buffer; - for (;;) { - bytes_read = read(mine->fd, mine->buffer, mine->block_size); - if (bytes_read < 0) { - if (errno == EINTR) - continue; - else 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); - } -} - -#if ARCHIVE_API_VERSION < 2 -static ssize_t -file_skip(struct archive *a, void *client_data, size_t request) -#else -static off_t -file_skip(struct archive *a, void *client_data, off_t request) -#endif -{ - struct read_file_data *mine = (struct read_file_data *)client_data; - off_t old_offset, new_offset; - - if (!mine->can_skip) /* We can't skip, so ... */ - return (0); /* ... skip zero bytes. */ - - /* Reduce request to the next smallest multiple of block_size */ - request = (request / mine->block_size) * mine->block_size; - if (request == 0) - return (0); - - /* - * Hurray for lazy evaluation: if the first lseek fails, the second - * one will not be executed. - */ - if (((old_offset = lseek(mine->fd, 0, SEEK_CUR)) < 0) || - ((new_offset = lseek(mine->fd, request, SEEK_CUR)) < 0)) - { - /* If skip failed once, it will probably fail again. */ - mine->can_skip = 0; - - if (errno == ESPIPE) - { - /* - * Failure to lseek() can be caused by the file - * descriptor pointing to a pipe, socket or FIFO. - * Return 0 here, so the compression layer will use - * read()s instead to advance the file descriptor. - * It's slower of course, but works as well. - */ - return (0); - } - /* - * There's been an error other than ESPIPE. This is most - * likely caused by a programmer error (too large request) - * or a corrupted archive file. - */ - if (mine->filename[0] == '\0') - /* - * Should never get here, since lseek() on stdin ought - * to return an ESPIPE error. - */ - archive_set_error(a, errno, "Error seeking in stdin"); - else - archive_set_error(a, errno, "Error seeking in '%s'", - mine->filename); - return (-1); - } - return (new_offset - old_offset); -} - -static int -file_close(struct archive *a, void *client_data) -{ - struct read_file_data *mine = (struct read_file_data *)client_data; - - (void)a; /* UNUSED */ - - /* Only flush and close if open succeeded. */ - if (mine->fd >= 0) { - /* - * 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); - } - free(mine->buffer); - free(mine); - return (ARCHIVE_OK); -} |
