error.h: make errno number reading easier

Trying to match error number with enum requires manual effort. Make it
easier by adding a comment with errno for every enum value.

Signed-off-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
(cherry picked from commit a6f3fd339e2f104a64979196648086d996cb4409)

diff --git a/include/libcgroup/error.h b/include/libcgroup/error.h
index 14a6e16818c0a241cc173a3e8b86113a9e01c94a..5d727dc5b9c25b9d32c11aebfda0b9eaed5afd11 100644 (file)
--- a/include/libcgroup/error.h
+++ b/include/libcgroup/error.h
@@ -30,50 +30,50 @@ extern "C" {
 
 enum {
        ECGROUPNOTCOMPILED = 50000,
-       ECGROUPNOTMOUNTED,
-       ECGROUPNOTEXIST,
-       ECGROUPNOTCREATED,
-       ECGROUPSUBSYSNOTMOUNTED,
-       ECGROUPNOTOWNER,
+       ECGROUPNOTMOUNTED,              /* 50001 */
+       ECGROUPNOTEXIST,                /* 50002 */
+       ECGROUPNOTCREATED,              /* 50003 */
+       ECGROUPSUBSYSNOTMOUNTED,        /* 50004 */
+       ECGROUPNOTOWNER,                /* 50005 */
        /** Controllers bound to different mount points */
-       ECGROUPMULTIMOUNTED,
+       ECGROUPMULTIMOUNTED,            /* 50006 */
        /* This is the stock error. Default error. @todo really? */
-       ECGROUPNOTALLOWED,
-       ECGMAXVALUESEXCEEDED,
-       ECGCONTROLLEREXISTS,
-       ECGVALUEEXISTS,
-       ECGINVAL,
-       ECGCONTROLLERCREATEFAILED,
-       ECGFAIL,
-       ECGROUPNOTINITIALIZED,
-       ECGROUPVALUENOTEXIST,
+       ECGROUPNOTALLOWED,              /* 50007 */
+       ECGMAXVALUESEXCEEDED,           /* 50008 */
+       ECGCONTROLLEREXISTS,            /* 50009 */
+       ECGVALUEEXISTS,                 /* 50010 */
+       ECGINVAL,                       /* 50011 */
+       ECGCONTROLLERCREATEFAILED,      /* 50012 */
+       ECGFAIL,                        /* 50013 */
+       ECGROUPNOTINITIALIZED,          /* 50014 */
+       ECGROUPVALUENOTEXIST,           /* 50015 */
        /**
         * Represents error coming from other libraries like glibc. @c libcgroup
         * users need to check cgroup_get_last_errno() upon encountering this
         * error.
         */
-       ECGOTHER,
-       ECGROUPNOTEQUAL,
-       ECGCONTROLLERNOTEQUAL,
+       ECGOTHER,                       /* 50016 */
+       ECGROUPNOTEQUAL,                /* 50017 */
+       ECGCONTROLLERNOTEQUAL,          /* 50018 */
        /** Failed to parse rules configuration file. */
-       ECGROUPPARSEFAIL,
+       ECGROUPPARSEFAIL,               /* 50019 */
        /** Rules list does not exist. */
-       ECGROUPNORULES,
-       ECGMOUNTFAIL,
+       ECGROUPNORULES,                 /* 50020 */
+       ECGMOUNTFAIL,                   /* 50021 */
        /**
         * Not an real error, it just indicates that iterator has come to end
         * of sequence and no more items are left.
         */
        ECGEOF = 50023,
        /** Failed to parse config file (cgconfig.conf). */
-       ECGCONFIGPARSEFAIL,
-       ECGNAMESPACEPATHS,
-       ECGNAMESPACECONTROLLER,
-       ECGMOUNTNAMESPACE,
-       ECGROUPUNSUPP,
-       ECGCANTSETVALUE,
+       ECGCONFIGPARSEFAIL,             /* 50024 */
+       ECGNAMESPACEPATHS,              /* 50025 */
+       ECGNAMESPACECONTROLLER,         /* 50026 */
+       ECGMOUNTNAMESPACE,              /* 50027 */
+       ECGROUPUNSUPP,                  /* 50028 */
+       ECGCANTSETVALUE,                /* 50029 */
        /** Removing of a group failed because it was not empty. */
-       ECGNONEMPTY,
+       ECGNONEMPTY,                    /* 50030 */
 };
 
 /**