Add the parser of process name in /etc/cgrules.conf.

Hi,

Changelog of v6:
================
 * The definations of CGROUP_RULE_MAXKEY and CGROUP_RULE_MAXLINE are
   moved to libcgroup-internal.h since no one from outside should be
   using them.

Changelog of v5:
================
 * Rebase the patch to the latest code.

Changelog of v4:
================
 * Use more safety length of a user name for the buffer "username".
 * Move the macros min()/max() to src/libcgroup-internal.h for using
   in src/api.c also.

Changelog of v3:
================
 * Fix unclear buffer of user by memset().

Changelog of v2:
================
 * Remove unnecessary memset().
 * Some cleanups.

Description:
============
This patch adds the parser of process name in /etc/cgrules.conf.

A new rule based on process name is as the following, and the process
name is stored into the member "procname" in struct cgroup_rule.
  <user>:<process name>  <controllers>   <destination>

Thanks
Ken'ichi Ohmichi

Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/libcgroup-internal.h b/src/libcgroup-internal.h
index fac82a1..fa92048 100644
--- a/src/libcgroup-internal.h
+++ b/src/libcgroup-internal.h
@@ -30,12 +30,22 @@ __BEGIN_DECLS
 
 #define CGROUP_BUFFER_LEN (5 * FILENAME_MAX)
 
+/* Maximum length of a key(<user>:<process name>) in the daemon config file */
+#define CGROUP_RULE_MAXKEY	(LOGIN_NAME_MAX + FILENAME_MAX + 1)
+
+/* Maximum length of a line in the daemon config file */
+#define CGROUP_RULE_MAXLINE	(FILENAME_MAX + CGROUP_RULE_MAXKEY + \
+	CG_CONTROLLER_MAX + 3)
+
 #ifdef CGROUP_DEBUG
 #define cgroup_dbg(x...) printf(x)
 #else
 #define cgroup_dbg(x...) do {} while (0)
 #endif
 
+#define max(x,y) ((y)<(x)?(x):(y))
+#define min(x,y) ((y)>(x)?(x):(y))
+
 struct control_value {
 	char name[FILENAME_MAX];
 	char value[CG_VALUE_MAX];
@@ -77,6 +87,7 @@ struct cgroup_rules_data {
 struct cgroup_rule {
 	uid_t uid;
 	gid_t gid;
+	char *procname;
 	char username[LOGIN_NAME_MAX];
 	char destination[FILENAME_MAX];
 	char *controllers[MAX_MNT_ELEMENTS];