Loading...
1/*
2 * Helper functions for handling target threads/cpus
3 *
4 * Copyright (C) 2012, LG Electronics, Namhyung Kim <namhyung.kim@lge.com>
5 *
6 * Released under the GPL v2.
7 */
8
9#include "target.h"
10#include "debug.h"
11
12#include <pwd.h>
13#include <string.h>
14
15
16enum target_errno target__validate(struct target *target)
17{
18 enum target_errno ret = TARGET_ERRNO__SUCCESS;
19
20 if (target->pid)
21 target->tid = target->pid;
22
23 /* CPU and PID are mutually exclusive */
24 if (target->tid && target->cpu_list) {
25 target->cpu_list = NULL;
26 if (ret == TARGET_ERRNO__SUCCESS)
27 ret = TARGET_ERRNO__PID_OVERRIDE_CPU;
28 }
29
30 /* UID and PID are mutually exclusive */
31 if (target->tid && target->uid_str) {
32 target->uid_str = NULL;
33 if (ret == TARGET_ERRNO__SUCCESS)
34 ret = TARGET_ERRNO__PID_OVERRIDE_UID;
35 }
36
37 /* UID and CPU are mutually exclusive */
38 if (target->uid_str && target->cpu_list) {
39 target->cpu_list = NULL;
40 if (ret == TARGET_ERRNO__SUCCESS)
41 ret = TARGET_ERRNO__UID_OVERRIDE_CPU;
42 }
43
44 /* PID and SYSTEM are mutually exclusive */
45 if (target->tid && target->system_wide) {
46 target->system_wide = false;
47 if (ret == TARGET_ERRNO__SUCCESS)
48 ret = TARGET_ERRNO__PID_OVERRIDE_SYSTEM;
49 }
50
51 /* UID and SYSTEM are mutually exclusive */
52 if (target->uid_str && target->system_wide) {
53 target->system_wide = false;
54 if (ret == TARGET_ERRNO__SUCCESS)
55 ret = TARGET_ERRNO__UID_OVERRIDE_SYSTEM;
56 }
57
58 /* THREAD and SYSTEM/CPU are mutually exclusive */
59 if (target->per_thread && (target->system_wide || target->cpu_list)) {
60 target->per_thread = false;
61 if (ret == TARGET_ERRNO__SUCCESS)
62 ret = TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD;
63 }
64
65 return ret;
66}
67
68enum target_errno target__parse_uid(struct target *target)
69{
70 struct passwd pwd, *result;
71 char buf[1024];
72 const char *str = target->uid_str;
73
74 target->uid = UINT_MAX;
75 if (str == NULL)
76 return TARGET_ERRNO__SUCCESS;
77
78 /* Try user name first */
79 getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
80
81 if (result == NULL) {
82 /*
83 * The user name not found. Maybe it's a UID number.
84 */
85 char *endptr;
86 int uid = strtol(str, &endptr, 10);
87
88 if (*endptr != '\0')
89 return TARGET_ERRNO__INVALID_UID;
90
91 getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
92
93 if (result == NULL)
94 return TARGET_ERRNO__USER_NOT_FOUND;
95 }
96
97 target->uid = result->pw_uid;
98 return TARGET_ERRNO__SUCCESS;
99}
100
101/*
102 * This must have a same ordering as the enum target_errno.
103 */
104static const char *target__error_str[] = {
105 "PID/TID switch overriding CPU",
106 "PID/TID switch overriding UID",
107 "UID switch overriding CPU",
108 "PID/TID switch overriding SYSTEM",
109 "UID switch overriding SYSTEM",
110 "SYSTEM/CPU switch overriding PER-THREAD",
111 "Invalid User: %s",
112 "Problems obtaining information for user %s",
113};
114
115int target__strerror(struct target *target, int errnum,
116 char *buf, size_t buflen)
117{
118 int idx;
119 const char *msg;
120
121 BUG_ON(buflen == 0);
122
123 if (errnum >= 0) {
124 const char *err = strerror_r(errnum, buf, buflen);
125
126 if (err != buf)
127 scnprintf(buf, buflen, "%s", err);
128
129 return 0;
130 }
131
132 if (errnum < __TARGET_ERRNO__START || errnum >= __TARGET_ERRNO__END)
133 return -1;
134
135 idx = errnum - __TARGET_ERRNO__START;
136 msg = target__error_str[idx];
137
138 switch (errnum) {
139 case TARGET_ERRNO__PID_OVERRIDE_CPU ...
140 TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD:
141 snprintf(buf, buflen, "%s", msg);
142 break;
143
144 case TARGET_ERRNO__INVALID_UID:
145 case TARGET_ERRNO__USER_NOT_FOUND:
146 snprintf(buf, buflen, msg, target->uid_str);
147 break;
148
149 default:
150 /* cannot reach here */
151 break;
152 }
153
154 return 0;
155}
1/*
2 * Helper functions for handling target threads/cpus
3 *
4 * Copyright (C) 2012, LG Electronics, Namhyung Kim <namhyung.kim@lge.com>
5 *
6 * Released under the GPL v2.
7 */
8
9#include "target.h"
10#include "debug.h"
11
12#include <pwd.h>
13#include <string.h>
14
15
16enum perf_target_errno perf_target__validate(struct perf_target *target)
17{
18 enum perf_target_errno ret = PERF_ERRNO_TARGET__SUCCESS;
19
20 if (target->pid)
21 target->tid = target->pid;
22
23 /* CPU and PID are mutually exclusive */
24 if (target->tid && target->cpu_list) {
25 target->cpu_list = NULL;
26 if (ret == PERF_ERRNO_TARGET__SUCCESS)
27 ret = PERF_ERRNO_TARGET__PID_OVERRIDE_CPU;
28 }
29
30 /* UID and PID are mutually exclusive */
31 if (target->tid && target->uid_str) {
32 target->uid_str = NULL;
33 if (ret == PERF_ERRNO_TARGET__SUCCESS)
34 ret = PERF_ERRNO_TARGET__PID_OVERRIDE_UID;
35 }
36
37 /* UID and CPU are mutually exclusive */
38 if (target->uid_str && target->cpu_list) {
39 target->cpu_list = NULL;
40 if (ret == PERF_ERRNO_TARGET__SUCCESS)
41 ret = PERF_ERRNO_TARGET__UID_OVERRIDE_CPU;
42 }
43
44 /* PID and SYSTEM are mutually exclusive */
45 if (target->tid && target->system_wide) {
46 target->system_wide = false;
47 if (ret == PERF_ERRNO_TARGET__SUCCESS)
48 ret = PERF_ERRNO_TARGET__PID_OVERRIDE_SYSTEM;
49 }
50
51 /* UID and SYSTEM are mutually exclusive */
52 if (target->uid_str && target->system_wide) {
53 target->system_wide = false;
54 if (ret == PERF_ERRNO_TARGET__SUCCESS)
55 ret = PERF_ERRNO_TARGET__UID_OVERRIDE_SYSTEM;
56 }
57
58 return ret;
59}
60
61enum perf_target_errno perf_target__parse_uid(struct perf_target *target)
62{
63 struct passwd pwd, *result;
64 char buf[1024];
65 const char *str = target->uid_str;
66
67 target->uid = UINT_MAX;
68 if (str == NULL)
69 return PERF_ERRNO_TARGET__SUCCESS;
70
71 /* Try user name first */
72 getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
73
74 if (result == NULL) {
75 /*
76 * The user name not found. Maybe it's a UID number.
77 */
78 char *endptr;
79 int uid = strtol(str, &endptr, 10);
80
81 if (*endptr != '\0')
82 return PERF_ERRNO_TARGET__INVALID_UID;
83
84 getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
85
86 if (result == NULL)
87 return PERF_ERRNO_TARGET__USER_NOT_FOUND;
88 }
89
90 target->uid = result->pw_uid;
91 return PERF_ERRNO_TARGET__SUCCESS;
92}
93
94/*
95 * This must have a same ordering as the enum perf_target_errno.
96 */
97static const char *perf_target__error_str[] = {
98 "PID/TID switch overriding CPU",
99 "PID/TID switch overriding UID",
100 "UID switch overriding CPU",
101 "PID/TID switch overriding SYSTEM",
102 "UID switch overriding SYSTEM",
103 "Invalid User: %s",
104 "Problems obtaining information for user %s",
105};
106
107int perf_target__strerror(struct perf_target *target, int errnum,
108 char *buf, size_t buflen)
109{
110 int idx;
111 const char *msg;
112
113 if (errnum >= 0) {
114 strerror_r(errnum, buf, buflen);
115 return 0;
116 }
117
118 if (errnum < __PERF_ERRNO_TARGET__START ||
119 errnum >= __PERF_ERRNO_TARGET__END)
120 return -1;
121
122 idx = errnum - __PERF_ERRNO_TARGET__START;
123 msg = perf_target__error_str[idx];
124
125 switch (errnum) {
126 case PERF_ERRNO_TARGET__PID_OVERRIDE_CPU
127 ... PERF_ERRNO_TARGET__UID_OVERRIDE_SYSTEM:
128 snprintf(buf, buflen, "%s", msg);
129 break;
130
131 case PERF_ERRNO_TARGET__INVALID_UID:
132 case PERF_ERRNO_TARGET__USER_NOT_FOUND:
133 snprintf(buf, buflen, msg, target->uid_str);
134 break;
135
136 default:
137 /* cannot reach here */
138 break;
139 }
140
141 return 0;
142}