175729fc2c
The cache.h header doesn't use any of the definitions in some of the headers it includes, ditch them and fix the fallout, where files were getting stuff they needed just because they were including it, sometimes not using what it really exports at all. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-l6r2bmj8h1g3e01wr981on0n@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
157 lines
3.4 KiB
C
157 lines
3.4 KiB
C
/*
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* Helper functions for handling target threads/cpus
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*
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* Copyright (C) 2012, LG Electronics, Namhyung Kim <namhyung.kim@lge.com>
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*
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* Released under the GPL v2.
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*/
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#include "target.h"
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#include "util.h"
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#include "debug.h"
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#include <pwd.h>
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#include <string.h>
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enum target_errno target__validate(struct target *target)
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{
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enum target_errno ret = TARGET_ERRNO__SUCCESS;
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if (target->pid)
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target->tid = target->pid;
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/* CPU and PID are mutually exclusive */
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if (target->tid && target->cpu_list) {
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target->cpu_list = NULL;
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if (ret == TARGET_ERRNO__SUCCESS)
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ret = TARGET_ERRNO__PID_OVERRIDE_CPU;
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}
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/* UID and PID are mutually exclusive */
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if (target->tid && target->uid_str) {
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target->uid_str = NULL;
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if (ret == TARGET_ERRNO__SUCCESS)
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ret = TARGET_ERRNO__PID_OVERRIDE_UID;
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}
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/* UID and CPU are mutually exclusive */
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if (target->uid_str && target->cpu_list) {
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target->cpu_list = NULL;
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if (ret == TARGET_ERRNO__SUCCESS)
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ret = TARGET_ERRNO__UID_OVERRIDE_CPU;
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}
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/* PID and SYSTEM are mutually exclusive */
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if (target->tid && target->system_wide) {
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target->system_wide = false;
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if (ret == TARGET_ERRNO__SUCCESS)
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ret = TARGET_ERRNO__PID_OVERRIDE_SYSTEM;
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}
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/* UID and SYSTEM are mutually exclusive */
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if (target->uid_str && target->system_wide) {
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target->system_wide = false;
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if (ret == TARGET_ERRNO__SUCCESS)
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ret = TARGET_ERRNO__UID_OVERRIDE_SYSTEM;
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}
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/* THREAD and SYSTEM/CPU are mutually exclusive */
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if (target->per_thread && (target->system_wide || target->cpu_list)) {
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target->per_thread = false;
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if (ret == TARGET_ERRNO__SUCCESS)
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ret = TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD;
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}
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return ret;
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}
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enum target_errno target__parse_uid(struct target *target)
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{
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struct passwd pwd, *result;
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char buf[1024];
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const char *str = target->uid_str;
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target->uid = UINT_MAX;
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if (str == NULL)
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return TARGET_ERRNO__SUCCESS;
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/* Try user name first */
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getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
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if (result == NULL) {
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/*
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* The user name not found. Maybe it's a UID number.
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*/
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char *endptr;
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int uid = strtol(str, &endptr, 10);
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if (*endptr != '\0')
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return TARGET_ERRNO__INVALID_UID;
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getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
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if (result == NULL)
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return TARGET_ERRNO__USER_NOT_FOUND;
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}
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target->uid = result->pw_uid;
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return TARGET_ERRNO__SUCCESS;
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}
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/*
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* This must have a same ordering as the enum target_errno.
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*/
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static const char *target__error_str[] = {
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"PID/TID switch overriding CPU",
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"PID/TID switch overriding UID",
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"UID switch overriding CPU",
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"PID/TID switch overriding SYSTEM",
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"UID switch overriding SYSTEM",
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"SYSTEM/CPU switch overriding PER-THREAD",
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"Invalid User: %s",
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"Problems obtaining information for user %s",
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};
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int target__strerror(struct target *target, int errnum,
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char *buf, size_t buflen)
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{
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int idx;
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const char *msg;
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BUG_ON(buflen == 0);
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if (errnum >= 0) {
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const char *err = str_error_r(errnum, buf, buflen);
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if (err != buf)
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scnprintf(buf, buflen, "%s", err);
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return 0;
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}
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if (errnum < __TARGET_ERRNO__START || errnum >= __TARGET_ERRNO__END)
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return -1;
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idx = errnum - __TARGET_ERRNO__START;
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msg = target__error_str[idx];
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switch (errnum) {
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case TARGET_ERRNO__PID_OVERRIDE_CPU ...
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TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD:
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snprintf(buf, buflen, "%s", msg);
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break;
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case TARGET_ERRNO__INVALID_UID:
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case TARGET_ERRNO__USER_NOT_FOUND:
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snprintf(buf, buflen, msg, target->uid_str);
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break;
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default:
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/* cannot reach here */
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break;
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}
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return 0;
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}
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