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https://github.com/boykopovar/AnyPS5.git
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Opensource55
d09671fecb
The UCRT drops a stream's read buffer before its `lseek` to a negative target fails with `EINVAL`, so a rejected `fseeko` or `fsetpos` left the stream at the descriptor's read-ahead offset: after 4 of 8 buffered bytes, a rejected `fsetpos` to -1 reported the position as 8 and the next read returned EOF. FreeBSD 11.4's `_fseeko` keeps the buffer and the position when `_sseek` fails. `fseeko` now rejects a target before the start of the file before the host stream is touched, computing the base from `_ftelli64` for `SEEK_CUR` and `_filelengthi64` for `SEEK_END`, and answers `EINVAL` with the stream unchanged. A target that is not negative still goes to `_fseeki64`, and a host seek that fails for another reason behaves as before. `file_position` gains the three rejected targets: `fsetpos` to -1 after 4 buffered bytes, `fseeko` with `SEEK_CUR` past the start, and `fseeko` with `SEEK_END` past the start; each asserts `EINVAL`, an unchanged `fgetpos` and the next byte read.
118 lines
4.3 KiB
C++
118 lines
4.3 KiB
C++
#include "prx/libc/include/Api.hpp"
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#include "prx/libc/include/FileStream.hpp"
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#include "prx/libc/include/general/VabiMacros.hpp"
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#include "tests/TemporaryFile.hpp"
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#include <cerrno>
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#ifdef _WIN32
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#include <fcntl.h>
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#include <io.h>
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#include <windows.h>
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#else
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#include <unistd.h>
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#endif
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static void Check(bool value, int line) {
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if (!value) {
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std::fprintf(stderr, "File position check failed at line %d\n", line);
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std::abort();
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}
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}
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#define Require(value) Check((value), __LINE__)
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static void CheckFseekBounds() {
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FileStream file(TemporaryFile::Open());
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Require(fwrite_nid_postfix("0123456789", 1, 10, &file) == 10);
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rewind_nid_postfix(&file);
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errno = 0;
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Require(fseek_nid_postfix(&file, -1, SEEK_SET) == -1 && errno == EINVAL);
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Require(ftello_nid_postfix(&file) == 0);
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Require(fseek_nid_postfix(&file, -3, SEEK_END) == 0 && ftello_nid_postfix(&file) == 7);
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Require(fgetc_nid_postfix(&file) == '7');
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Require(fseek_nid_postfix(&file, 100, SEEK_SET) == 0 && ftello_nid_postfix(&file) == 100);
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Require(fgetc_nid_postfix(&file) == EOF && feof_nid_postfix(&file) != 0);
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file.Close();
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}
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static void CheckFailedSeekKeepsPosition() {
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FileStream file(TemporaryFile::Open());
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Require(fwrite_nid_postfix("01234567", 1, 8, &file) == 8);
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rewind_nid_postfix(&file);
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for (const char expected : {'0', '1', '2', '3'}) Require(fgetc_nid_postfix(&file) == expected);
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std::int64_t position = -1;
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Require(fgetpos_nid_postfix(&file, &position) == 0 && position == 4);
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const std::int64_t negative = -1;
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errno = 0;
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Require(fsetpos_nid_postfix(&file, &negative) == -1 && errno == EINVAL);
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Require(fgetpos_nid_postfix(&file, &position) == 0 && position == 4);
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Require(fgetc_nid_postfix(&file) == '4');
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errno = 0;
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Require(fseeko_nid_postfix(&file, -6, SEEK_CUR) == -1 && errno == EINVAL);
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Require(fgetpos_nid_postfix(&file, &position) == 0 && position == 5);
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Require(fgetc_nid_postfix(&file) == '5');
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errno = 0;
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Require(fseeko_nid_postfix(&file, -9, SEEK_END) == -1 && errno == EINVAL);
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Require(fgetpos_nid_postfix(&file, &position) == 0 && position == 6);
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Require(fgetc_nid_postfix(&file) == '6');
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file.Close();
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}
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int main() {
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CheckFseekBounds();
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CheckFailedSeekKeepsPosition();
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FileStream file(TemporaryFile::Open());
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Require(std::fputs("position", file.GetHandle()) >= 0);
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std::int64_t position = -1;
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Require(fgetpos_nid_postfix(&file, &position) == 0);
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Require(position == 8);
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const std::int64_t beginning = 0;
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Require(fsetpos_nid_postfix(&file, &beginning) == 0);
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Require(std::fgetc(file.GetHandle()) == 'p');
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Require(fgetpos_nid_postfix(&file, &position) == 0 && position == 1);
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file.Close();
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FileStream reread(TemporaryFile::Open());
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Require(std::fputs("position", reread.GetHandle()) >= 0);
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Require(fsetpos_nid_postfix(&reread, &beginning) == 0);
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for (const char expected : {'p', 'o', 's'}) Require(fgetc_nid_postfix(&reread) == expected);
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Require(fgetpos_nid_postfix(&reread, &position) == 0 && position == 3);
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const std::int64_t third = position;
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while (fgetc_nid_postfix(&reread) != EOF) {}
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Require(feof_nid_postfix(&reread) != 0);
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Require(fsetpos_nid_postfix(&reread, &third) == 0);
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Require(feof_nid_postfix(&reread) == 0);
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Require(fgetc_nid_postfix(&reread) == 'i');
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const std::int64_t negative = -1;
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errno = 0;
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Require(fsetpos_nid_postfix(&reread, &negative) != 0);
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Require(errno == EINVAL);
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reread.Close();
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int descriptors[2];
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#ifdef _WIN32
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Require(_pipe(descriptors, 4096, _O_BINARY) == 0);
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FileStream pipe(_fdopen(descriptors[0], "rb"));
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Require(_close(descriptors[1]) == 0);
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Require(CloseHandle(reinterpret_cast<HANDLE>(_get_osfhandle(descriptors[0]))) != 0);
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#else
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Require(::pipe(descriptors) == 0);
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FileStream pipe(::fdopen(descriptors[0], "rb"));
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Require(::close(descriptors[1]) == 0);
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#endif
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Require(ftello_nid_postfix(&pipe) == -1);
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const int expectedError = errno;
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Require(expectedError != 0);
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position = 123;
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errno = 0;
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Require(fgetpos_nid_postfix(&pipe, &position) != 0);
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Require(errno == expectedError);
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Require(position == 123);
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#ifdef _WIN32
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Require(std::fclose(pipe.GetHandle()) == EOF);
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#else
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pipe.Close();
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#endif
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}
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