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#include <libcgroup.h>
#include <libcgroup-internal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pwd.h>
#include <sys/types.h>
#include <errno.h>
#include "tools-common.h"
int main(int argc, char *argv[])
{
int ret = 0;
int i, j;
char c;
/* Structure to get GID from group name */
struct group *grp = NULL;
char *grp_string = NULL;
/* Structure to get UID from user name */
struct passwd *pwd = NULL;
char *pwd_string = NULL;
uid_t tuid = CGRULE_INVALID, auid = CGRULE_INVALID;
gid_t tgid = CGRULE_INVALID, agid = CGRULE_INVALID;
struct cgroup_group_spec *cgroup_list[CG_HIER_MAX];
struct cgroup *cgroup;
struct cgroup_controller *cgc;
/* no parametr on input */
if (argc < 2) {
fprintf(stderr, "Usage is %s "
"-t <tuid>:<tgid> -a <agid>:<auid> "
"-g <list of controllers>:<relative path to cgroup>\n",
argv[0]);
return -1;
}
memset(cgroup_list, 0, sizeof(cgroup_list));
/* parse arguments */
while ((c = getopt(argc, argv, "a:t:g:")) > 0) {
switch (c) {
case 'a':
/* set admin uid/gid */
if (optarg[0] == ':')
grp_string = strtok(optarg, ":");
else {
pwd_string = strtok(optarg, ":");
if (pwd_string != NULL)
grp_string = strtok(NULL, ":");
}
if (pwd_string != NULL) {
pwd = getpwnam(pwd_string);
if (pwd != NULL) {
auid = pwd->pw_uid;
} else {
fprintf(stderr, "%s: "
"can't find uid of user %s.\n",
argv[0], pwd_string);
return -1;
}
}
if (grp_string != NULL) {
grp = getgrnam(grp_string);
if (grp != NULL)
agid = grp->gr_gid;
else {
fprintf(stderr, "%s: "
"can't find gid of group %s.\n",
argv[0], grp_string);
return -1;
}
}
break;
case 't':
/* set task uid/gid */
if (optarg[0] == ':')
grp_string = strtok(optarg, ":");
else {
pwd_string = strtok(optarg, ":");
if (pwd_string != NULL)
grp_string = strtok(NULL, ":");
}
if (pwd_string != NULL) {
pwd = getpwnam(pwd_string);
if (pwd != NULL) {
tuid = pwd->pw_uid;
} else {
fprintf(stderr, "%s: "
"can't find uid of user %s.\n",
argv[0], pwd_string);
return -1;
}
}
if (grp_string != NULL) {
grp = getgrnam(grp_string);
if (grp != NULL)
tgid = grp->gr_gid;
else {
fprintf(stderr, "%s: "
"can't find gid of group %s.\n",
argv[0], grp_string);
return -1;
}
}
break;
case 'g':
if (parse_cgroup_spec(cgroup_list, optarg)) {
fprintf(stderr, "%s: "
"cgroup controller and path"
"parsing failed (%s)\n",
argv[0], argv[optind]);
return -1;
}
break;
default:
fprintf(stderr, "%s: "
"invalid command line option\n",
argv[0]);
return -1;
break;
}
}
/* no cgroup name */
if (argv[optind]) {
fprintf(stderr, "%s: "
"wrong arguments (%s)\n",
argv[0], argv[optind]);
ret = -1;
goto err;
}
/* initialize libcg */
ret = cgroup_init();
if (ret) {
fprintf(stderr, "%s: "
"libcgroup initialization failed: %s\n",
argv[0], cgroup_strerror(ret));
goto err;
}
/* for each new cgroup */
for (i = 0; i < CG_HIER_MAX; i++) {
if (!cgroup_list[i])
break;
/* create the new cgroup structure */
cgroup = cgroup_new_cgroup(cgroup_list[i]->path);
if (!cgroup) {
ret = ECGFAIL;
fprintf(stderr, "%s: can't add new cgroup: %s\n",
argv[0], cgroup_strerror(ret));
goto err;
}
/* set uid and gid for the new cgroup based on input options */
ret = cgroup_set_uid_gid(cgroup, tuid, tgid, auid, agid);
if (ret)
goto err;
/* add controllers to the new cgroup */
j = 0;
while (cgroup_list[i]->controllers[j]) {
cgc = cgroup_add_controller(cgroup,
cgroup_list[i]->controllers[j]);
if (!cgc) {
ret = ECGINVAL;
fprintf(stderr, "%s: "
"controller %s can't be add\n",
argv[0],
cgroup_list[i]->controllers[j]);
cgroup_free(&cgroup);
goto err;
}
j++;
}
/* all variables set so create cgroup */
ret = cgroup_create_cgroup(cgroup, 0);
if (ret) {
fprintf(stderr, "%s: "
"can't create cgroup %s: %s\n",
argv[0], cgroup->name, cgroup_strerror(ret));
cgroup_free(&cgroup);
goto err;
}
cgroup_free(&cgroup);
}
err:
for (i = 0; i < CG_HIER_MAX; i++) {
if (cgroup_list[i])
cgroup_free_group_spec(cgroup_list[i]);
}
return ret;
}
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