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/*
** Copyright 1998-2003 University of Illinois Board of Trustees
** Copyright 1998-2003 Mark D. Roth
** All rights reserved.
**
** handle.c - libtar code for initializing a TAR handle
**
** Mark D. Roth <roth@uiuc.edu>
** Campus Information Technologies and Educational Services
** University of Illinois at Urbana-Champaign
*/
#include <libtarint/internal.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef STDC_HEADERS
# include <stdlib.h>
#endif
#if defined ( _MSC_VER) || defined(__WATCOMC__)
#include <io.h>
//Yogi: hack. this should work on windows where there is no O_ACCMODE defined
#ifndef O_ACCMODE
# define O_ACCMODE 0x0003
#endif
#endif
const char libtar_version[] = PACKAGE_VERSION;
struct libtar_fd_file
{
int fd;
};
static struct libtar_fd_file libtar_fd_file_pointer;
static int libtar_open(void* call_data, const char* pathname, int flags, mode_t mode)
{
struct libtar_fd_file* lf = (struct libtar_fd_file*)call_data;
lf->fd = open(pathname, flags, mode);
return lf->fd;
}
static int libtar_close(void* call_data)
{
struct libtar_fd_file* lf = (struct libtar_fd_file*)call_data;
return close(lf->fd);
}
static ssize_t libtar_read(void* call_data, void* buf, size_t count)
{
struct libtar_fd_file* lf = (struct libtar_fd_file*)call_data;
return (ssize_t)read(lf->fd, buf, (unsigned int)count);
}
static ssize_t libtar_write(void* call_data, const void* buf, size_t count)
{
struct libtar_fd_file* lf = (struct libtar_fd_file*)call_data;
return (ssize_t) write(lf->fd, buf, (unsigned int)count);
}
static tartype_t default_type = { libtar_open, libtar_close, libtar_read, libtar_write, &libtar_fd_file_pointer };
static int
tar_init(TAR **t, char *pathname, tartype_t *type,
int oflags, int mode, int options)
{
(void)mode;
if ((oflags & O_ACCMODE) == O_RDWR)
{
errno = EINVAL;
return -1;
}
*t = (TAR *)calloc(1, sizeof(TAR));
if (*t == NULL)
return -1;
(*t)->pathname = pathname;
(*t)->options = options;
(*t)->type = (type ? type : &default_type);
(*t)->oflags = oflags;
if ((oflags & O_ACCMODE) == O_RDONLY)
(*t)->h = libtar_hash_new(256,
(libtar_hashfunc_t)path_hashfunc);
else
(*t)->h = libtar_hash_new(16, (libtar_hashfunc_t)dev_hash);
if ((*t)->h == NULL)
{
free(*t);
return -1;
}
return 0;
}
/* open a new tarfile handle */
int
tar_open(TAR **t, char *pathname, tartype_t *type,
int oflags, int mode, int options)
{
int res;
if (tar_init(t, pathname, type, oflags, mode, options) == -1)
return -1;
if ((options & TAR_NOOVERWRITE) && (oflags & O_CREAT))
oflags |= O_EXCL;
#ifdef O_BINARY
oflags |= O_BINARY;
#endif
res = (*((*t)->type->openfunc))((*t)->type->call_data, pathname, oflags, mode);
if (res == -1)
{
free(*t);
return -1;
}
return 0;
}
int
tar_fdopen(TAR **t, int fd, char *pathname, tartype_t *type,
int oflags, int mode, int options)
{
if (tar_init(t, pathname, type, oflags, mode, options) == -1)
return -1;
if ( !type )
{
struct libtar_fd_file* lf = (struct libtar_fd_file*)((*t)->type->call_data);
lf->fd = fd;
}
return 0;
}
/* close tarfile handle */
int
tar_close(TAR *t)
{
int i;
i = (*(t->type->closefunc))(t->type->call_data);
if (t->h != NULL)
libtar_hash_free(t->h, ((t->oflags & O_ACCMODE) == O_RDONLY
? free
: (libtar_freefunc_t)tar_dev_free));
free(t);
return i;
}
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