libcgroup: Move parse_cgroup_data to separate .c file

From: Jan Safranek <jsafrane@redhat.com>

Cgclassify could benefit from parsing of -g command line option, let's move it
to separate file, where both cgexec and cgclassify can use it.

The data structures and function names are also more descriptive now.

I added also the copyright notice and license to the new files.

Signed-off-by: Jan Safranek <jsafrane@redhat.com>
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>



git-svn-id: https://libcg.svn.sourceforge.net/svnroot/libcg/trunk@339 4f4bb910-9a46-0410-90c8-c897d4f1cd53

1 files changed, 88 insertions, 0 deletions

diff --git a/tools-common.c b/tools-common.c
new file mode 100644
index 0000000..2cedf23
--- /dev/null
+++ b/tools-common.c
@@ -0,0 +1,88 @@
+/*
+ * 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, ":");
+	dbg("list of controllers is %s\n", cptr);
+	if (!cptr)
+		return -1;
+
+	/* Extract cgroup path */
+	pathptr = strtok(NULL, ":");
+	dbg("cgroup path is %s\n", pathptr);
+	if (!pathptr)
+		return -1;
+
+	/* instanciate cgroup_data. */
+	cdptr[i] = malloc(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;
+}