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Merge pull request #10781 from MarcZX10/marc/fix-printf-s-closed-stdout

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fix(libc): fail printf_s on a closed standard output with EBADF
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Dean authored and GitHub committed 2026-10-27 09:04:40 +13:00
2 parents da1d222d52 2562a7d9d1
commit fd0da73ec5
2 files changed
+6
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core/libs/prx/libc/src/Formatting.cpp
+2
View File
@@ -714,6 +714,7 @@ int APS5_VABI snprintf_s_nid_postfix(char* buffer, size_t size, const char* form
}
int APS5_VABI printf_s_nid_postfix(const char* format, ...) {
if (!_Stdout_nid_postfix.IsOpen()) { errno = 9; return -1; }
__builtin_sysv_va_list args;
__builtin_sysv_va_start(args, format);
const int result = LibcDetail::PrintWindows(format, args);
@@ -754,6 +755,7 @@ int APS5_VABI snprintf_s_nid_postfix(char* buffer, size_t size, const char* form
}
int APS5_VABI printf_s_nid_postfix(const char* format, ...) {
if (!_Stdout_nid_postfix.IsOpen()) { errno = 9; return -1; }
std::va_list args;
va_start(args, format);
const int result = RequiresGuestFormatting(format) ? LibcDetail::PrintWindows(format, args) : std::vfprintf(GuestStandardOutputFile_nid_no_patch(), format, args);
core/libs/tests/GuestStandardStreams.cpp
+4
View File
@@ -575,6 +575,10 @@ static int CheckClosedStandardOutput() {
Require(printf_nid_postfix("%d", 1) == -1 && *__error_nid_postfix() == 9);
Require(puts_nid_postfix("text") == -1 && *__error_nid_postfix() == 9);
Require(PrintStandard("%d", 1) == -1 && *__error_nid_postfix() == 9);
*__error_nid_postfix() = 0;
Require(printf_s_nid_postfix("%d", 1) == -1 && *__error_nid_postfix() == 9);
*__error_nid_postfix() = 0;
Require(printf_s_nid_postfix("%p", nullptr) == -1 && *__error_nid_postfix() == 9);
Require(fputs_nid_postfix("text", __stdoutp_nid_postfix) == -1 && *__error_nid_postfix() == 9);
*__error_nid_postfix() = 0;
Require(wprintf_nid_postfix(u"%d", 1) == -1 && *__error_nid_postfix() == 9);