72648326ea
This adds a simply but powerful tool for downloading container images
from the most popular container solution used today. Use it like
this:
# systemd-import pull-dck mattdm/fedora
# systemd-nspawn -M fedora
This will donwload the layers for "mattdm/fedora", and make them
available locally as /var/lib/container/fedora.
The tool is pretty complete, as long as it's only about pulling down
images, or updating them. Pushing or searching is not supported yet.
74 lines
2 KiB
C
74 lines
2 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <ftw.h>
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#include "util.h"
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#include "aufs-util.h"
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static int nftw_cb(
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const char *fpath,
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const struct stat *sb,
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int flag,
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struct FTW *ftwbuf) {
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const char *fn, *original;
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char *p;
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int r;
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fn = fpath + ftwbuf->base;
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/* We remove all whiteout files, and all whiteouts */
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original = startswith(fn, ".wh.");
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if (!original)
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return FTW_CONTINUE;
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log_debug("Removing whiteout indicator %s.", fpath);
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r = rm_rf_dangerous(fpath, false, true, false);
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if (r < 0)
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return FTW_STOP;
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if (!startswith(fn, ".wh..wh.")) {
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p = alloca(ftwbuf->base + strlen(original));
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strcpy(mempcpy(p, fpath, ftwbuf->base), original);
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log_debug("Removing deleted file %s.", p);
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r = rm_rf_dangerous(p, false, true, false);
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if (r < 0)
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return FTW_STOP;
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}
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return FTW_CONTINUE;
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}
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int aufs_resolve(const char *path) {
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int r;
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errno = 0;
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r = nftw(path, nftw_cb, 64, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL);
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if (r == FTW_STOP)
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return errno ? -errno : -EIO;
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return 0;
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}
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