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/*
* Copyright Red Hat, Inc. 2009
*
* Author: Vivek Goyal <vgoyal@redhat.com>
* Jan Safranek <jsafrane@redhat.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
*/
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <libcgroup.h>
#include "tools-common.h"
int parse_cgroup_spec(struct cgroup_group_spec *cdptr[], char *optarg)
{
struct cgroup_group_spec *ptr;
int i, j;
char *cptr, *pathptr, *temp;
ptr = *cdptr;
/* Find first free entry inside the cgroup data array */
for (i = 0; i < CG_HIER_MAX; i++, ptr++) {
if (!cdptr[i])
break;
}
if (i == CG_HIER_MAX) {
/* No free slot found */
fprintf(stderr, "Max allowed hierarchies %d reached\n",
CG_HIER_MAX);
return -1;
}
/* Extract list of controllers */
cptr = strtok(optarg, ":");
cgroup_dbg("list of controllers is %s\n", cptr);
if (!cptr)
return -1;
/* Extract cgroup path */
pathptr = strtok(NULL, ":");
cgroup_dbg("cgroup path is %s\n", pathptr);
if (!pathptr)
return -1;
/* instanciate cgroup_data. */
cdptr[i] = calloc(1, sizeof(struct cgroup_group_spec));
if (!cdptr[i]) {
fprintf(stderr, "%s\n", strerror(errno));
return -1;
}
/* Convert list of controllers into an array of strings. */
j = 0;
do {
if (j == 0)
temp = strtok(cptr, ",");
else
temp = strtok(NULL, ",");
if (temp) {
cdptr[i]->controllers[j] = strdup(temp);
if (!cdptr[i]->controllers[j]) {
free(cdptr[i]);
fprintf(stderr, "%s\n", strerror(errno));
return -1;
}
}
j++;
} while (temp);
/* Store path to the cgroup */
strncpy(cdptr[i]->path, pathptr, FILENAME_MAX);
cdptr[i]->path[FILENAME_MAX-1] = '\0';
return 0;
}
/**
* Free a single cgroup_group_spec structure
* <--->@param cl The structure to free from memory.
*/
void cgroup_free_group_spec(struct cgroup_group_spec *cl)
{
/* Loop variable */
int i = 0;
/* Make sure our structure is not NULL, first. */
if (!cl) {
cgroup_dbg("Warning: Attempted to free NULL rule.\n");
return;
}
/* We must free any used controller strings, too. */
for (i = 0; i < CG_CONTROLLER_MAX; i++) {
if (cl->controllers[i])
free(cl->controllers[i]);
}
free(cl);
}
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