1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
#ifndef _LIBCGROUP_ERROR_H
#define _LIBCGROUP_ERROR_H
#ifndef _LIBCGROUP_H_INSIDE
#error "Only <libcgroup.h> should be included directly."
#endif
#include <features.h>
__BEGIN_DECLS
/**
* @defgroup group_errors 6. Error handling
* @{
*
* @name Error handling
* @{
* Unless states otherwise in documentation of a function, all functions
* return @c int, which is zero (0) when the function succeeds, and positive
* number if the function fails.
*
* The returned integer is one of the ECG* values described below. Value
* #ECGOTHER means that the error was caused by underlying OS and the real
* cause can be found by calling cgroup_get_last_errno().
*/
enum {
ECGROUPNOTCOMPILED = 50000,
ECGROUPNOTMOUNTED,
ECGROUPNOTEXIST,
ECGROUPNOTCREATED,
ECGROUPSUBSYSNOTMOUNTED,
ECGROUPNOTOWNER,
/** Controllers bound to different mount points */
ECGROUPMULTIMOUNTED,
/* This is the stock error. Default error. @todo really? */
ECGROUPNOTALLOWED,
ECGMAXVALUESEXCEEDED,
ECGCONTROLLEREXISTS,
ECGVALUEEXISTS,
ECGINVAL,
ECGCONTROLLERCREATEFAILED,
ECGFAIL,
ECGROUPNOTINITIALIZED,
ECGROUPVALUENOTEXIST,
/**
* 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,
/** Failed to parse rules configuration file. */
ECGROUPPARSEFAIL,
/** Rules list does not exist. */
ECGROUPNORULES,
ECGMOUNTFAIL,
/**
* Not an real error, just a auxiliary mark in the enum.
* Please insert further error codes above this.
*/
ECGSENTINEL,
/**
* Not an real error, it just indicates that iterator has come to end
* of sequence and no more items are left.
*/
ECGEOF,
/** Failed to parse config file (cgconfig.conf). */
ECGCONFIGPARSEFAIL,
ECGNAMESPACEPATHS,
ECGNAMESPACECONTROLLER,
ECGMOUNTNAMESPACE,
};
/**
* Legacy definition of ECGRULESPARSEFAIL error code.
*/
#define ECGRULESPARSEFAIL ECGROUPPARSEFAIL
/**
* Format error code to a human-readable English string. No internationalization
* is currently done. Returned pointer leads to @c libcgroup memory and
* must not be freed nor modified. The memory is rewritten by subsequent
* call to this function.
* @param code Error code for which the corresponding error string is
* returned. When #ECGOTHER is used, text with glibc's description of
* cgroup_get_last_errno() value is returned.
*/
const char *cgroup_strerror(int code);
/**
* Return last errno, which caused ECGOTHER error.
*/
int cgroup_get_last_errno(void);
/**
* @}
* @}
*/
__END_DECLS
#endif /* _LIBCGROUP_INIT_H */
|
