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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | /* * Helper functions for handling target threads/cpus * * Copyright (C) 2012, LG Electronics, Namhyung Kim <namhyung.kim@lge.com> * * Released under the GPL v2. */ #include "target.h" #include "debug.h" #include <pwd.h> #include <string.h> enum perf_target_errno perf_target__validate(struct perf_target *target) { enum perf_target_errno ret = PERF_ERRNO_TARGET__SUCCESS; if (target->pid) target->tid = target->pid; /* CPU and PID are mutually exclusive */ if (target->tid && target->cpu_list) { target->cpu_list = NULL; if (ret == PERF_ERRNO_TARGET__SUCCESS) ret = PERF_ERRNO_TARGET__PID_OVERRIDE_CPU; } /* UID and PID are mutually exclusive */ if (target->tid && target->uid_str) { target->uid_str = NULL; if (ret == PERF_ERRNO_TARGET__SUCCESS) ret = PERF_ERRNO_TARGET__PID_OVERRIDE_UID; } /* UID and CPU are mutually exclusive */ if (target->uid_str && target->cpu_list) { target->cpu_list = NULL; if (ret == PERF_ERRNO_TARGET__SUCCESS) ret = PERF_ERRNO_TARGET__UID_OVERRIDE_CPU; } /* PID and SYSTEM are mutually exclusive */ if (target->tid && target->system_wide) { target->system_wide = false; if (ret == PERF_ERRNO_TARGET__SUCCESS) ret = PERF_ERRNO_TARGET__PID_OVERRIDE_SYSTEM; } /* UID and SYSTEM are mutually exclusive */ if (target->uid_str && target->system_wide) { target->system_wide = false; if (ret == PERF_ERRNO_TARGET__SUCCESS) ret = PERF_ERRNO_TARGET__UID_OVERRIDE_SYSTEM; } return ret; } enum perf_target_errno perf_target__parse_uid(struct perf_target *target) { struct passwd pwd, *result; char buf[1024]; const char *str = target->uid_str; target->uid = UINT_MAX; if (str == NULL) return PERF_ERRNO_TARGET__SUCCESS; /* Try user name first */ getpwnam_r(str, &pwd, buf, sizeof(buf), &result); if (result == NULL) { /* * The user name not found. Maybe it's a UID number. */ char *endptr; int uid = strtol(str, &endptr, 10); if (*endptr != '\0') return PERF_ERRNO_TARGET__INVALID_UID; getpwuid_r(uid, &pwd, buf, sizeof(buf), &result); if (result == NULL) return PERF_ERRNO_TARGET__USER_NOT_FOUND; } target->uid = result->pw_uid; return PERF_ERRNO_TARGET__SUCCESS; } /* * This must have a same ordering as the enum perf_target_errno. */ static const char *perf_target__error_str[] = { "PID/TID switch overriding CPU", "PID/TID switch overriding UID", "UID switch overriding CPU", "PID/TID switch overriding SYSTEM", "UID switch overriding SYSTEM", "Invalid User: %s", "Problems obtaining information for user %s", }; int perf_target__strerror(struct perf_target *target, int errnum, char *buf, size_t buflen) { int idx; const char *msg; BUG_ON(buflen == 0); if (errnum >= 0) { const char *err = strerror_r(errnum, buf, buflen); if (err != buf) { size_t len = strlen(err); memcpy(buf, err, min(buflen - 1, len)); *(buf + min(buflen - 1, len)) = '\0'; } return 0; } if (errnum < __PERF_ERRNO_TARGET__START || errnum >= __PERF_ERRNO_TARGET__END) return -1; idx = errnum - __PERF_ERRNO_TARGET__START; msg = perf_target__error_str[idx]; switch (errnum) { case PERF_ERRNO_TARGET__PID_OVERRIDE_CPU ... PERF_ERRNO_TARGET__UID_OVERRIDE_SYSTEM: snprintf(buf, buflen, "%s", msg); break; case PERF_ERRNO_TARGET__INVALID_UID: case PERF_ERRNO_TARGET__USER_NOT_FOUND: snprintf(buf, buflen, msg, target->uid_str); break; default: /* cannot reach here */ break; } return 0; } |