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lxc-unshare: Move functions to determine clone flags from command line options to namespace.c

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In order to be able to reuse code in lxc-attach, the functions
lxc_namespace_2_cloneflag and lxc_fill_namespace_flags are moved from
lxc_unshare.c to namespace.c.

Signed-off-by: Christian Seiler <christian@iwakd.de>
Cc: Daniel Lezcano <daniel.lezcano@free.fr>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
This commit is contained in:
Christian Seiler 2012-08-22 00:03:14 +02:00 committed by Stéphane Graber
parent fc763ab77d
commit 39a5d5feee
3 changed files with 48 additions and 45 deletions
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45
src/lxc/lxc_unshare.c
View File

@ -84,51 +84,6 @@ static uid_t lookup_user(const char *optarg)
return uid;
}
static char *namespaces_list[] = {
"MOUNT", "PID", "UTSNAME", "IPC",
"USER", "NETWORK"
};
static int cloneflags_list[] = {
CLONE_NEWNS, CLONE_NEWPID, CLONE_NEWUTS, CLONE_NEWIPC,
CLONE_NEWUSER, CLONE_NEWNET
};
static int lxc_namespace_2_cloneflag(char *namespace)
{
int i, len;
len = sizeof(namespaces_list)/sizeof(namespaces_list[0]);
for (i = 0; i < len; i++)
if (!strcmp(namespaces_list[i], namespace))
return cloneflags_list[i];
ERROR("invalid namespace name %s", namespace);
return -1;
}
static int lxc_fill_namespace_flags(char *flaglist, int *flags)
{
char *token, *saveptr = NULL;
int aflag;
if (!flaglist) {
ERROR("need at least one namespace to unshare");
return -1;
}
token = strtok_r(flaglist, "|", &saveptr);
while (token) {
aflag = lxc_namespace_2_cloneflag(token);
if (aflag < 0)
return -1;
*flags |= aflag;
token = strtok_r(NULL, "|", &saveptr);
}
return 0;
}
struct start_arg {
char ***args;

45
src/lxc/namespace.c
View File

@ -69,3 +69,48 @@ pid_t lxc_clone(int (*fn)(void *), void *arg, int flags)
return ret;
}
static char *namespaces_list[] = {
"MOUNT", "PID", "UTSNAME", "IPC",
"USER", "NETWORK"
};
static int cloneflags_list[] = {
CLONE_NEWNS, CLONE_NEWPID, CLONE_NEWUTS, CLONE_NEWIPC,
CLONE_NEWUSER, CLONE_NEWNET
};
int lxc_namespace_2_cloneflag(char *namespace)
{
int i, len;
len = sizeof(namespaces_list)/sizeof(namespaces_list[0]);
for (i = 0; i < len; i++)
if (!strcmp(namespaces_list[i], namespace))
return cloneflags_list[i];
ERROR("invalid namespace name %s", namespace);
return -1;
}
int lxc_fill_namespace_flags(char *flaglist, int *flags)
{
char *token, *saveptr = NULL;
int aflag;
if (!flaglist) {
ERROR("need at least one namespace to unshare");
return -1;
}
token = strtok_r(flaglist, "|", &saveptr);
while (token) {
aflag = lxc_namespace_2_cloneflag(token);
if (aflag < 0)
return -1;
*flags |= aflag;
token = strtok_r(NULL, "|", &saveptr);
}
return 0;
}

3
src/lxc/namespace.h
View File

@ -54,4 +54,7 @@ int clone(int (*fn)(void *), void *child_stack,
extern pid_t lxc_clone(int (*fn)(void *), void *arg, int flags);
extern int lxc_namespace_2_cloneflag(char *namespace);
extern int lxc_fill_namespace_flags(char *flaglist, int *flags);
#endif