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Implement os_system_version_get_current_version

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This commit is contained in:
Ariel Abreu 2021-05-05 15:42:26 -04:00
parent e60a45a711
commit 2dac15634f
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GPG Key ID: BB20848279B910AC
1 changed files with 48 additions and 15 deletions
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63
src/misc.m
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@ -24,6 +24,24 @@
#import <dispatch/mach_private.h>
#import <os/voucher_private.h>
#include <sys/sysctl.h>
struct os_system_version {
unsigned int major;
unsigned int minor;
unsigned int patch;
};
XPC_EXPORT
struct os_system_version _system_version_fallback = {
.major = 10,
.minor = 15,
.patch = 0,
};
static struct os_system_version current_version = {0};
static dispatch_once_t current_version_once;
XPC_EXPORT
bool _availability_version_check(size_t version_count, dyld_build_version_t* versions) {
// i'm *pretty* sure the second argument is an array of `dyld_build_version_t`
@ -43,26 +61,41 @@ bool _system_version_copy_string_plist(char* out_string) {
return false;
};
// provided string MUST have at least 48 characters
XPC_EXPORT
bool _system_version_copy_string_sysctl(char* out_string) {
xpc_stub();
return false;
};
XPC_EXPORT uint32_t _system_version_fallback[] = { 10, 15, 0 };
XPC_EXPORT
bool _system_version_parse_string(const char* string, uint32_t* out_version) {
// `version` is an array of 3 `uint32_t`s (or `int`s)
xpc_stub();
return false;
size_t out_string_length = 48;
return sysctlbyname("kern.osproductversion", out_string, &out_string_length, NULL, 0) == 0;
};
XPC_EXPORT
int os_system_version_get_current_version(uint32_t* out_version) {
// parameter 1's type is a good guess, but i'm unsure
xpc_stub();
return -1;
bool _system_version_parse_string(const char* string, struct os_system_version* out_version) {
sscanf(string, "%u.%u.%u", &out_version->major, &out_version->minor, &out_version->patch);
return true;
};
XPC_EXPORT
int os_system_version_get_current_version(struct os_system_version* out_version) {
dispatch_once(&current_version_once, ^{
char version_string[48] = {0};
if (!_system_version_copy_string_sysctl(version_string)) {
goto fallback;
}
if (!_system_version_parse_string(version_string, &current_version)) {
goto fallback;
}
return;
fallback:
memcpy(&current_version, &_system_version_fallback, sizeof(struct os_system_version));
});
memcpy(out_version, &current_version, sizeof(struct os_system_version));
return 0;
};
XPC_EXPORT