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);
}