Subversion Repositories SvarDOS

/*

 * simple unzip tool that unzips the content of a zip archive to current directory

 * returns 0 on success

 *

 * this file is part of pkg (SvarDOS)

 * copyright (C) 2021 Mateusz Viste

 */

#include <stdio.h>

#include "fileexst.h"

#include "helpers.h"

#include "kprintf.h"

#include "libunzip.h"

#include "unzip.h"

int unzip(const char *zipfile) {

  struct ziplist *zlist, *znode;

  FILE *fd;

  int r = 0;

  fd = fopen(zipfile, "rb");

  if (fd == NULL) {

    kitten_puts(10, 1, "ERROR: Failed to open the archive file");

    return(1);

  }

  zlist = zip_listfiles(fd);

  if (zlist == NULL) {

    kitten_puts(10, 2, "ERROR: Invalid ZIP archive");

    fclose(fd);

    return(-1);

  }

  /* examine the list of zipped files - make sure that no file currently

   * exists and that files are neither encrypted nor compressed with an

   * unsupported method */

  for (znode = zlist; znode != NULL; znode = znode->nextfile) {

    int zres;

    /* convert slash to backslash, print filename and create the directories path */

    slash2backslash(znode->filename);

    printf("%s ", znode->filename);

    mkpath(znode->filename);

    /* if a dir, we good already */

    if (znode->flags == ZIP_FLAG_ISADIR) goto OK;

    /* file already exists? */

    if (fileexists(znode->filename) != 0) {

      kitten_puts(10, 3, "ERROR: File already exists");

      r = 1;

      continue;

    }

    /* uncompress */

    zres = zip_unzip(fd, znode, znode->filename);

    if (zres != 0) {

      kitten_printf(10, 4, "ERROR: unzip failure (%d)", zres);

      puts("");

      continue;

    }

    OK:

    kitten_puts(10, 0, "OK");

  }

  zip_freelist(&zlist);

  fclose(fd);

  return(r);

}