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