2 * Helper functions for handling target threads/cpus
4 * Copyright (C) 2012, LG Electronics, Namhyung Kim <namhyung.kim@lge.com>
6 * Released under the GPL v2.
16 enum target_errno target__validate(struct target *target)
18 enum target_errno ret = TARGET_ERRNO__SUCCESS;
21 target->tid = target->pid;
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;
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;
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;
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;
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;
61 enum target_errno target__parse_uid(struct target *target)
63 struct passwd pwd, *result;
65 const char *str = target->uid_str;
67 target->uid = UINT_MAX;
69 return TARGET_ERRNO__SUCCESS;
71 /* Try user name first */
72 getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
76 * The user name not found. Maybe it's a UID number.
79 int uid = strtol(str, &endptr, 10);
82 return TARGET_ERRNO__INVALID_UID;
84 getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
87 return TARGET_ERRNO__USER_NOT_FOUND;
90 target->uid = result->pw_uid;
91 return TARGET_ERRNO__SUCCESS;
95 * This must have a same ordering as the enum target_errno.
97 static const char *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",
104 "Problems obtaining information for user %s",
107 int target__strerror(struct target *target, int errnum,
108 char *buf, size_t buflen)
116 const char *err = strerror_r(errnum, buf, buflen);
119 size_t len = strlen(err);
120 memcpy(buf, err, min(buflen - 1, len));
121 *(buf + min(buflen - 1, len)) = '\0';
127 if (errnum < __TARGET_ERRNO__START || errnum >= __TARGET_ERRNO__END)
130 idx = errnum - __TARGET_ERRNO__START;
131 msg = target__error_str[idx];
134 case TARGET_ERRNO__PID_OVERRIDE_CPU ... TARGET_ERRNO__UID_OVERRIDE_SYSTEM:
135 snprintf(buf, buflen, "%s", msg);
138 case TARGET_ERRNO__INVALID_UID:
139 case TARGET_ERRNO__USER_NOT_FOUND:
140 snprintf(buf, buflen, msg, target->uid_str);
144 /* cannot reach here */