plash import-tar

Usage

plash import-tar [ TARFILE ]

Description

Create a container from a tar file.
If the TARFILE argument is ommited, the tar file is read from stdin.

Tested Behaviour

#!/bin/sh

set -ex

tar=$(mktemp)

plash b export-tar -f 1 --run 'touch /myperson' -- $tar

• importing tar file succeeds

new=$(plash import-tar $tar)

plash with-mount $new ls ./myperson

• can import file from stdin

cat $tar | plash import-tar

• importing invalid or missing file fails

(! plash import-tar /doesnotexistssssh_really_4423487)

badtar=$(mktemp)

(! plash import-tar $badtar)

• importing invalid file from stdin fails

(! echo 'invalid' | plash import-tar)

Source Code

#define USAGE "usage: plash import-tar [ TARFILE ]\n"

#include <plash.h>
#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>

int import_tar_main(int argc, char *argv[]) {
  char *tarfile = argv[1];
  if (tarfile == NULL) {
    tarfile = "-";
  }
  char *tmpdir = pl_call("mkdtemp");
  pl_run("/proc/self/exe", "sudo", "tar", "-C", tmpdir, "-xf", tarfile);
  execlp("/proc/self/exe", "plash", "add-layer", "0", tmpdir, NULL);
  pl_fatal("execlp");
  return EXIT_FAILURE;
}