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#include "common/sysctl.h"
#include <stdlib.h>
#ifdef __OpenBSD__
const char* ffSysctlGetString(int mib1, int mib2, FFstrbuf* result) {
size_t neededLength;
if (sysctl((int[]) { mib1, mib2 }, 2, NULL, &neededLength, NULL, 0) != 0 || neededLength == 1) { // neededLength is 1 for empty strings, because of the null terminator
return "sysctl() length query failed";
}
ffStrbufEnsureFree(result, (uint32_t) neededLength - 1);
if (sysctl((int[]) { mib1, mib2 }, 2, result->chars + result->length, &neededLength, NULL, 0) != 0) {
return "sysctl() failed to retrieve string data";
}
result->length += (uint32_t) neededLength - 1;
result->chars[result->length] = '\0';
return NULL;
}
int ffSysctlGetInt(int mib1, int mib2, int defaultValue) {
int result;
size_t neededLength = sizeof(result);
if (sysctl((int[]) { mib1, mib2 }, 2, &result, &neededLength, NULL, 0) != 0) {
return defaultValue;
}
return result;
}
int64_t ffSysctlGetInt64(int mib1, int mib2, int64_t defaultValue) {
int64_t result;
size_t neededLength = sizeof(result);
if (sysctl((int[]) { mib1, mib2 }, 2, &result, &neededLength, NULL, 0) != 0) {
return defaultValue;
}
return result;
}
#else
const char* ffSysctlGetString(const char* propName, FFstrbuf* result) {
size_t neededLength;
if (sysctlbyname(propName, NULL, &neededLength, NULL, 0) != 0 || neededLength == 1) { // neededLength is 1 for empty strings, because of the null terminator
return "sysctlbyname() failed";
}
ffStrbufEnsureFree(result, (uint32_t) neededLength - 1);
if (sysctlbyname(propName, result->chars + result->length, &neededLength, NULL, 0) != 0) {
return "sysctlbyname() failed to retrieve string data";
}
result->length += (uint32_t) neededLength - 1;
result->chars[result->length] = '\0';
return NULL;
}
int ffSysctlGetInt(const char* propName, int defaultValue) {
int result;
size_t neededLength = sizeof(result);
if (sysctlbyname(propName, &result, &neededLength, NULL, 0) != 0) {
return defaultValue;
}
return result;
}
int64_t ffSysctlGetInt64(const char* propName, int64_t defaultValue) {
int64_t result;
size_t neededLength = sizeof(result);
if (sysctlbyname(propName, &result, &neededLength, NULL, 0) != 0) {
return defaultValue;
}
return result;
}
#endif // OpenBSD
void* ffSysctlGetData(int* request, u_int requestLength, size_t* resultLength) {
if (sysctl(request, requestLength, NULL, resultLength, NULL, 0) != 0) {
return NULL;
}
void* data = malloc(*resultLength);
if (sysctl(request, requestLength, data, resultLength, NULL, 0) != 0) {
free(data);
return NULL;
}
return data;
}
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