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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2015 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "btrfs-util.h"
#include "string-util.h"
#include "util.h"
#include "import-util.h"
int import_url_last_component(const char *url, char **ret) {
const char *e, *p;
char *s;
e = strchrnul(url, '?');
while (e > url && e[-1] == '/')
e--;
p = e;
while (p > url && p[-1] != '/')
p--;
if (e <= p)
return -EINVAL;
s = strndup(p, e - p);
if (!s)
return -ENOMEM;
*ret = s;
return 0;
}
int import_url_change_last_component(const char *url, const char *suffix, char **ret) {
const char *e;
char *s;
assert(url);
assert(ret);
e = strchrnul(url, '?');
while (e > url && e[-1] == '/')
e--;
while (e > url && e[-1] != '/')
e--;
if (e <= url)
return -EINVAL;
s = new(char, (e - url) + strlen(suffix) + 1);
if (!s)
return -ENOMEM;
strcpy(mempcpy(s, url, e - url), suffix);
*ret = s;
return 0;
}
static const char* const import_verify_table[_IMPORT_VERIFY_MAX] = {
[IMPORT_VERIFY_NO] = "no",
[IMPORT_VERIFY_CHECKSUM] = "checksum",
[IMPORT_VERIFY_SIGNATURE] = "signature",
};
DEFINE_STRING_TABLE_LOOKUP(import_verify, ImportVerify);
int tar_strip_suffixes(const char *name, char **ret) {
const char *e;
char *s;
e = endswith(name, ".tar");
if (!e)
e = endswith(name, ".tar.xz");
if (!e)
e = endswith(name, ".tar.gz");
if (!e)
e = endswith(name, ".tar.bz2");
if (!e)
e = endswith(name, ".tgz");
if (!e)
e = strchr(name, 0);
if (e <= name)
return -EINVAL;
s = strndup(name, e - name);
if (!s)
return -ENOMEM;
*ret = s;
return 0;
}
int raw_strip_suffixes(const char *p, char **ret) {
static const char suffixes[] =
".xz\0"
".gz\0"
".bz2\0"
".raw\0"
".qcow2\0"
".img\0"
".bin\0";
_cleanup_free_ char *q = NULL;
q = strdup(p);
if (!q)
return -ENOMEM;
for (;;) {
const char *sfx;
bool changed = false;
NULSTR_FOREACH(sfx, suffixes) {
char *e;
e = endswith(q, sfx);
if (e) {
*e = 0;
changed = true;
}
}
if (!changed)
break;
}
*ret = q;
q = NULL;
return 0;
}
bool dkr_digest_is_valid(const char *digest) {
/* 7 chars for prefix, 64 chars for the digest itself */
if (strlen(digest) != 71)
return false;
return startswith(digest, "sha256:") && in_charset(digest + 7, "0123456789abcdef");
}
bool dkr_ref_is_valid(const char *ref) {
const char *colon;
if (isempty(ref))
return false;
colon = strchr(ref, ':');
if (!colon)
return filename_is_valid(ref);
return dkr_digest_is_valid(ref);
}
bool dkr_name_is_valid(const char *name) {
const char *slash, *p;
if (isempty(name))
return false;
slash = strchr(name, '/');
if (!slash)
return false;
if (!filename_is_valid(slash + 1))
return false;
p = strndupa(name, slash - name);
if (!filename_is_valid(p))
return false;
return true;
}
bool dkr_id_is_valid(const char *id) {
if (!filename_is_valid(id))
return false;
if (!in_charset(id, "0123456789abcdef"))
return false;
return true;
}
int import_assign_pool_quota_and_warn(const char *path) {
int r;
r = btrfs_subvol_auto_qgroup("/var/lib/machines", 0, true);
if (r == -ENOTTY) {
log_debug_errno(r, "Failed to set up default quota hierarchy for /var/lib/machines, as directory is not on btrfs or not a subvolume. Ignoring.");
return 0;
}
if (r < 0)
return log_error_errno(r, "Failed to set up default quota hierarchy for /var/lib/machines: %m");
if (r > 0)
log_info("Set up default quota hierarchy for /var/lib/machines.");
r = btrfs_subvol_auto_qgroup(path, 0, true);
if (r == -ENOTTY) {
log_debug_errno(r, "Failed to set up quota hierarchy for %s, as directory is not on btrfs or not a subvolume. Ignoring.", path);
return 0;
}
if (r < 0)
return log_error_errno(r, "Failed to set up default quota hierarchy for %s: %m", path);
if (r > 0)
log_info("Set up default quota hierarchy for %s.", path);
return 0;
}
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