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296 mateuszvis 1 
/*
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 * simple unzip tool that unzips the content of a zip archive to current directory
1889 mateusz.vi 3 
 * if listonly is set to a non-zero value then unzip() only lists the files
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 * returns 0 on success
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 *
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 * this file is part of pkg (SvarDOS)
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 * copyright (C) 2021-2024 Mateusz Viste
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 */
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#include <stdio.h>
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#include "fileexst.h"
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#include "helpers.h"
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#include "kprintf.h"
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#include "libunzip.h"
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#include "svarlang.lib\svarlang.h"
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#include "unzip.h"
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int unzip(const char *zipfile, unsigned char listonly) {
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  struct ziplist *zlist, *znode;
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  FILE *fd;
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  int r = 0;
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  fd = fopen(zipfile, "rb");
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  if (fd == NULL) {
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    puts(svarlang_str(10, 1)); /* "ERROR: Failed to open the archive file" */
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    return(1);
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  }
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  zlist = zip_listfiles(fd);
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  if (zlist == NULL) {
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    puts(svarlang_str(10, 2)); /* "ERROR: Invalid ZIP archive" */
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    fclose(fd);
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    return(-1);
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  }
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  if (listonly != 0) {
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    /* just list the files inside the archive */
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    for (znode = zlist; znode != NULL; znode = znode->nextfile) {
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      puts(znode->filename);
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    }
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  } else {
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    /* examine the list of zipped files - make sure that no file currently
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     * exists and that files are neither encrypted nor compressed with an
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     * unsupported method */
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    for (znode = zlist; znode != NULL; znode = znode->nextfile) {
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      int zres;
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      /* convert slash to backslash, print filename and create the directories path */
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      slash2backslash(znode->filename);
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      printf("%s ", znode->filename);
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      mkpath(znode->filename);
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      /* if a dir, we good already */
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      if (znode->flags == ZIP_FLAG_ISADIR) goto OK;
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      /* file already exists? */
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      if (fileexists(znode->filename) != 0) {
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        puts(svarlang_str(10, 3)); /* "ERROR: File already exists" */
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        r = 1;
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        continue;
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      }
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      /* uncompress */
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      zres = zip_unzip(fd, znode, znode->filename);
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      if (zres != 0) {
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        kitten_printf(10, 4, "ERROR: unzip failure (%d)", zres);
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        puts("");
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        continue;
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      }
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      OK:
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      puts(svarlang_str(10, 0)); /* "OK" */
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    }
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  }
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  zip_freelist(&zlist);
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  fclose(fd);
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  return(r);
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}