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/* apk_io.h - Alpine Package Keeper (APK)
*
* Copyright (C) 2008-2011 Timo Teräs <timo.teras@iki.fi>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation. See http://www.gnu.org/ for details.
*/
#ifndef APK_IO
#define APK_IO
#include <sys/types.h>
#include <openssl/evp.h>
#include <fcntl.h>
#include "apk_defines.h"
#include "apk_blob.h"
#include "apk_hash.h"
struct apk_id_cache {
int root_fd;
unsigned int genid;
struct apk_hash uid_cache;
struct apk_hash gid_cache;
};
struct apk_file_info {
char *name;
char *link_target;
char *uname;
char *gname;
off_t size;
uid_t uid;
gid_t gid;
mode_t mode;
time_t mtime;
dev_t device;
struct apk_checksum csum;
};
struct apk_istream {
ssize_t (*read)(void *stream, void *ptr, size_t size);
void (*close)(void *stream);
};
#define APK_BSTREAM_SINGLE_READ 0x0001
#define APK_BSTREAM_EOF 0x0002
struct apk_bstream {
unsigned int flags;
apk_blob_t (*read)(void *stream, apk_blob_t token);
void (*close)(void *stream, size_t *size);
};
struct apk_ostream {
ssize_t (*write)(void *stream, const void *buf, size_t size);
int (*close)(void *stream);
};
#define APK_MPART_DATA 1 /* data processed so far */
#define APK_MPART_BOUNDARY 2 /* final part of data, before boundary */
#define APK_MPART_END 3 /* signals end of stream */
typedef int (*apk_multipart_cb)(void *ctx, int part, apk_blob_t data);
struct apk_istream *apk_bstream_gunzip_mpart(struct apk_bstream *,
apk_multipart_cb cb, void *ctx);
static inline struct apk_istream *apk_bstream_gunzip(struct apk_bstream *bs)
{
return apk_bstream_gunzip_mpart(bs, NULL, NULL);
}
struct apk_ostream *apk_ostream_gzip(struct apk_ostream *);
struct apk_ostream *apk_ostream_counter(off_t *);
struct apk_istream *apk_istream_from_fd_pid(int fd, pid_t pid, int (*translate_status)(int));
struct apk_istream *apk_istream_from_file(int atfd, const char *file);
struct apk_istream *apk_istream_from_file_gz(int atfd, const char *file);
struct apk_istream *apk_istream_from_fd_url(int atfd, const char *url);
struct apk_istream *apk_istream_from_url_gz(const char *url);
size_t apk_istream_skip(struct apk_istream *istream, size_t size);
#define APK_SPLICE_ALL 0xffffffff
size_t apk_istream_splice(void *stream, int fd, size_t size,
apk_progress_cb cb, void *cb_ctx);
static inline struct apk_istream *apk_istream_from_fd(int fd)
{
return apk_istream_from_fd_pid(fd, 0, NULL);
}
static inline struct apk_istream *apk_istream_from_url(const char *url)
{
return apk_istream_from_fd_url(AT_FDCWD, url);
}
struct apk_bstream *apk_bstream_from_istream(struct apk_istream *istream);
struct apk_bstream *apk_bstream_from_fd_pid(int fd, pid_t pid, int (*translate_status)(int));
struct apk_bstream *apk_bstream_from_file(int atfd, const char *file);
struct apk_bstream *apk_bstream_from_fd_url(int atfd, const char *url);
struct apk_bstream *apk_bstream_tee(struct apk_bstream *from, int atfd, const char *to,
apk_progress_cb cb, void *cb_ctx);
static inline struct apk_bstream *apk_bstream_from_fd(int fd)
{
return apk_bstream_from_fd_pid(fd, 0, NULL);
}
static inline struct apk_bstream *apk_bstream_from_url(const char *url)
{
return apk_bstream_from_fd_url(AT_FDCWD, url);
}
struct apk_ostream *apk_ostream_to_fd(int fd);
struct apk_ostream *apk_ostream_to_file(int atfd, const char *file, const char *tmpfile, mode_t mode);
struct apk_ostream *apk_ostream_to_file_gz(int atfd, const char *file, const char *tmpfile, mode_t mode);
size_t apk_ostream_write_string(struct apk_ostream *ostream, const char *string);
apk_blob_t apk_blob_from_istream(struct apk_istream *istream, size_t size);
apk_blob_t apk_blob_from_file(int atfd, const char *file);
#define APK_BTF_ADD_EOL 0x00000001
int apk_blob_to_file(int atfd, const char *file, apk_blob_t b, unsigned int flags);
#define APK_FI_NOFOLLOW 0x80000000
int apk_file_get_info(int atfd, const char *filename, unsigned int flags,
struct apk_file_info *fi);
typedef int apk_dir_file_cb(void *ctx, int dirfd, const char *entry);
int apk_dir_foreach_file(int dirfd, apk_dir_file_cb cb, void *ctx);
int apk_move_file(int atfd, const char *from, const char *to);
const char *apk_url_local_file(const char *url);
void apk_id_cache_init(struct apk_id_cache *idc, int root_fd);
void apk_id_cache_free(struct apk_id_cache *idc);
void apk_id_cache_reset(struct apk_id_cache *idc);
uid_t apk_resolve_uid(struct apk_id_cache *idc, const char *username, uid_t default_uid);
uid_t apk_resolve_gid(struct apk_id_cache *idc, const char *groupname, uid_t default_gid);
#endif
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