mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
2cc7bad0ae
C99 specifies that the EOF condition on a file is "sticky": once EOF has been encountered, all subsequent reads should continue to return EOF until the file is closed or something clears the "end-of-file indicator" (e.g. fseek, clearerr). This is arguably a change from C89, where the wording was ambiguous; the BSDs always had sticky EOF, but the System V lineage would attempt to read from the underlying fd again. GNU libc has followed System V for as long as we've been using libio, but nowadays C99 conformance and BSD compatibility are more important than System V compatibility. You might wonder if changing the _underflow impls is sufficient to apply the C99 semantics to all of the many stdio functions that perform input. It should be enough to cover all paths to _IO_SYSREAD, and the only other functions that call _IO_SYSREAD are the _seekoff impls, which is OK because seeking clears EOF, and the _xsgetn impls, which, as far as I can tell, are unused within glibc. The test programs in this patch use a pseudoterminal to set up the necessary conditions. To facilitate this I added a new test-support function that sets up a pair of pty file descriptors for you; it's almost the same as BSD openpty, the only differences are that it allocates the optionally-returned tty pathname with malloc, and that it crashes if anything goes wrong. [BZ #1190] [BZ #19476] * libio/fileops.c (_IO_new_file_underflow): Return EOF immediately if the _IO_EOF_SEEN bit is already set; update commentary. * libio/oldfileops.c (_IO_old_file_underflow): Likewise. * libio/wfileops.c (_IO_wfile_underflow): Likewise. * support/support_openpty.c, support/tty.h: New files. * support/Makefile (libsupport-routines): Add support_openpty. * libio/tst-fgetc-after-eof.c, wcsmbs/test-fgetwc-after-eof.c: New test cases. * libio/Makefile (tests): Add tst-fgetc-after-eof. * wcsmbs/Makefile (tests): Add tst-fgetwc-after-eof.
231 lines
8.4 KiB
Makefile
231 lines
8.4 KiB
Makefile
# Copyright (C) 1995-2018 Free Software Foundation, Inc.
|
|
# This file is part of the GNU C Library.
|
|
|
|
# The GNU C Library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Lesser General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2.1 of the License, or (at your option) any later version.
|
|
|
|
# The GNU C Library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with the GNU C Library; if not, see
|
|
# <http://www.gnu.org/licenses/>.
|
|
|
|
#
|
|
# Specific makefile for libio.
|
|
#
|
|
subdir := libio
|
|
|
|
include ../Makeconfig
|
|
|
|
headers := stdio.h \
|
|
bits/stdio.h bits/stdio2.h bits/sys_errlist.h bits/stdio-ldbl.h \
|
|
bits/types/FILE.h bits/types/__FILE.h bits/types/struct_FILE.h \
|
|
bits/types/__fpos_t.h bits/types/__fpos64_t.h \
|
|
bits/types/cookie_io_functions_t.h
|
|
|
|
routines := \
|
|
filedoalloc iofclose iofdopen iofflush iofgetpos iofgets iofopen \
|
|
iofopncook iofputs iofread iofsetpos ioftell wfiledoalloc \
|
|
iofwrite iogetdelim iogetline iogets iopadn iopopen ioputs \
|
|
ioseekoff ioseekpos iosetbuffer iosetvbuf ioungetc \
|
|
iovsprintf iovsscanf \
|
|
iofgetpos64 iofopen64 iofsetpos64 \
|
|
fputwc fputwc_u getwc getwc_u getwchar getwchar_u iofgetws iofgetws_u \
|
|
iofputws iofputws_u iogetwline iowpadn ioungetwc putwc putwc_u \
|
|
putwchar putwchar_u putchar putchar_u fwprintf swprintf vwprintf \
|
|
wprintf wscanf fwscanf vwscanf vswprintf iovswscanf swscanf wgenops \
|
|
wstrops wfileops iofwide fwide wmemstream \
|
|
\
|
|
clearerr feof ferror fileno fputc freopen fseek getc getchar \
|
|
memstream pclose putc putchar rewind setbuf setlinebuf vasprintf \
|
|
iovdprintf vscanf vsnprintf obprintf fcloseall fseeko ftello \
|
|
freopen64 fseeko64 ftello64 \
|
|
\
|
|
__fbufsize __freading __fwriting __freadable __fwritable __flbf \
|
|
__fpurge __fpending __fsetlocking \
|
|
\
|
|
libc_fatal fmemopen oldfmemopen vtables
|
|
|
|
tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc \
|
|
tst_wprintf2 tst-widetext test-fmemopen tst-ext tst-ext2 \
|
|
tst-fgetws tst-ungetwc1 tst-ungetwc2 tst-swscanf tst-sscanf \
|
|
tst-mmap-setvbuf bug-ungetwc1 bug-ungetwc2 tst-atime tst-eof \
|
|
tst-freopen bug-rewind bug-rewind2 bug-ungetc bug-fseek \
|
|
tst-mmap-eofsync tst-mmap-fflushsync bug-mmap-fflush \
|
|
tst-mmap2-eofsync tst-mmap-offend bug-fopena+ bug-wfflush \
|
|
bug-ungetc2 bug-ftell bug-ungetc3 bug-ungetc4 tst-fopenloc2 \
|
|
tst-memstream1 tst-memstream2 tst-memstream3 \
|
|
tst-wmemstream1 tst-wmemstream2 tst-wmemstream3 \
|
|
bug-memstream1 bug-wmemstream1 \
|
|
tst-setvbuf1 tst-popen1 tst-fgetwc bug-wsetpos tst-fseek \
|
|
tst-fwrite-error tst-ftell-partial-wide tst-ftell-active-handler \
|
|
tst-ftell-append tst-fputws tst-bz22415 tst-fgetc-after-eof
|
|
|
|
ifeq (yes,$(build-shared))
|
|
# Add test-fopenloc only if shared library is enabled since it depends on
|
|
# shared localedata objects.
|
|
tests += tst-fopenloc
|
|
endif
|
|
test-srcs = test-freopen
|
|
|
|
ifeq ($(build-shared),yes)
|
|
routines += oldiofopen oldiofdopen oldiofclose oldiopopen oldpclose \
|
|
oldtmpfile oldiofgetpos oldiofgetpos64 oldiofsetpos \
|
|
oldiofsetpos64
|
|
endif
|
|
|
|
ifeq (yes,$(libc-reentrant))
|
|
routines += clearerr_u feof_u ferror_u fputc_u getc_u getchar_u \
|
|
iofflush_u putc_u putchar_u peekc iofread_u iofwrite_u iofgets_u \
|
|
iofputs_u
|
|
endif
|
|
|
|
CPPFLAGS += $(libio-mtsafe)
|
|
|
|
# Support for exception handling.
|
|
CFLAGS-fileops.c += -fexceptions
|
|
CFLAGS-fputc.c += -fexceptions
|
|
CFLAGS-fputwc.c += -fexceptions
|
|
CFLAGS-freopen64.c += -fexceptions
|
|
CFLAGS-freopen.c += -fexceptions
|
|
CFLAGS-fseek.c += -fexceptions
|
|
CFLAGS-fseeko64.c += -fexceptions
|
|
CFLAGS-fseeko.c += -fexceptions
|
|
CFLAGS-ftello64.c += -fexceptions
|
|
CFLAGS-ftello.c += -fexceptions
|
|
CFLAGS-fwide.c += -fexceptions
|
|
CFLAGS-genops.c += -fexceptions
|
|
CFLAGS-getc.c += -fexceptions
|
|
CFLAGS-getchar.c += -fexceptions
|
|
CFLAGS-getwc.c += -fexceptions
|
|
CFLAGS-getwchar.c += -fexceptions
|
|
CFLAGS-iofclose.c += -fexceptions
|
|
CFLAGS-iofflush.c += -fexceptions
|
|
CFLAGS-iofgetpos64.c += -fexceptions
|
|
CFLAGS-iofgetpos.c += -fexceptions
|
|
CFLAGS-iofgets.c += -fexceptions
|
|
CFLAGS-iofgetws.c += -fexceptions
|
|
CFLAGS-iofputs.c += -fexceptions
|
|
CFLAGS-iofputws.c += -fexceptions
|
|
CFLAGS-iofread.c += -fexceptions
|
|
CFLAGS-iofsetpos64.c += -fexceptions
|
|
CFLAGS-iofsetpos.c += -fexceptions
|
|
CFLAGS-ioftell.c += -fexceptions
|
|
CFLAGS-iofwrite.c += -fexceptions
|
|
CFLAGS-iogetdelim.c += -fexceptions
|
|
CFLAGS-iogetline.c += -fexceptions
|
|
CFLAGS-iogets.c += -fexceptions
|
|
CFLAGS-iogetwline.c += -fexceptions
|
|
CFLAGS-ioputs.c += -fexceptions
|
|
CFLAGS-ioseekoff.c += -fexceptions
|
|
CFLAGS-ioseekpos.c += -fexceptions
|
|
CFLAGS-iosetbuffer.c += -fexceptions
|
|
CFLAGS-iosetvbuf.c += -fexceptions
|
|
CFLAGS-ioungetc.c += -fexceptions
|
|
CFLAGS-ioungetwc.c += -fexceptions
|
|
CFLAGS-oldfileops.c += -fexceptions
|
|
CFLAGS-oldiofclose.c += -fexceptions
|
|
CFLAGS-oldiofgetpos64.c += -fexceptions
|
|
CFLAGS-oldiofgetpos.c += -fexceptions
|
|
CFLAGS-oldiofsetpos64.c += -fexceptions
|
|
CFLAGS-oldiofsetpos.c += -fexceptions
|
|
CFLAGS-peekc.c += -fexceptions
|
|
CFLAGS-putc.c += -fexceptions
|
|
CFLAGS-putchar.c += -fexceptions
|
|
CFLAGS-putwc.c += -fexceptions
|
|
CFLAGS-putwchar.c += -fexceptions
|
|
CFLAGS-rewind.c += -fexceptions
|
|
CFLAGS-wfileops.c += -fexceptions
|
|
CFLAGS-wgenops.c += -fexceptions
|
|
CFLAGS-oldiofopen.c += -fexceptions
|
|
CFLAGS-iofopen.c += -fexceptions
|
|
CFLAGS-iofopen64.c += -fexceptions
|
|
CFLAGS-oldtmpfile.c += -fexceptions
|
|
# XXX Do we need filedoalloc and wfiledoalloc? Others?
|
|
|
|
CFLAGS-tst_putwc.c += -DOBJPFX=\"$(objpfx)\"
|
|
|
|
tst_wprintf2-ARGS = "Some Text"
|
|
|
|
test-fmemopen-ENV = MALLOC_TRACE=$(objpfx)test-fmemopen.mtrace
|
|
tst-fopenloc-ENV = MALLOC_TRACE=$(objpfx)tst-fopenloc.mtrace
|
|
tst-bz22415-ENV = MALLOC_TRACE=$(objpfx)tst-bz22415.mtrace
|
|
|
|
generated += test-fmemopen.mtrace test-fmemopen.check
|
|
generated += tst-fopenloc.mtrace tst-fopenloc.check
|
|
generated += tst-bz22415.mtrace tst-bz22415.check
|
|
|
|
aux := fileops genops stdfiles stdio strops
|
|
|
|
ifeq ($(build-shared),yes)
|
|
aux += oldfileops oldstdfiles
|
|
endif
|
|
|
|
shared-only-routines = oldiofopen oldiofdopen oldiofclose oldfileops \
|
|
oldstdfiles oldiopopen oldpclose oldtmpfile \
|
|
oldiofgetpos oldiofgetpos64 oldiofsetpos \
|
|
oldiofsetpos64
|
|
|
|
ifeq ($(run-built-tests),yes)
|
|
tests-special += $(objpfx)test-freopen.out $(objpfx)test-fmemopen-mem.out \
|
|
$(objpfx)tst-bz22415-mem.out
|
|
ifeq (yes,$(build-shared))
|
|
# Run tst-fopenloc-cmp.out and tst-openloc-mem.out only if shared
|
|
# library is enabled since they depend on tst-fopenloc.out.
|
|
tests-special += $(objpfx)tst-fopenloc-cmp.out $(objpfx)tst-fopenloc-mem.out
|
|
endif
|
|
endif
|
|
|
|
include ../Rules
|
|
|
|
ifeq ($(run-built-tests),yes)
|
|
LOCALES := de_DE.ISO-8859-1 de_DE.UTF-8 en_US.ISO-8859-1 en_US.UTF-8 \
|
|
ja_JP.EUC-JP ja_JP.UTF-8
|
|
include ../gen-locales.mk
|
|
|
|
$(objpfx)bug-ftell.out: $(gen-locales)
|
|
$(objpfx)bug-ungetwc1.out: $(gen-locales)
|
|
$(objpfx)bug-ungetwc2.out: $(gen-locales)
|
|
$(objpfx)tst-fgetwc.out: $(gen-locales)
|
|
$(objpfx)tst-fgetws.out: $(gen-locales)
|
|
$(objpfx)tst-fopenloc.out: $(gen-locales)
|
|
$(objpfx)tst-fputws.out: $(gen-locales)
|
|
$(objpfx)tst-fseek.out: $(gen-locales)
|
|
$(objpfx)tst-ftell-active-handler.out: $(gen-locales)
|
|
$(objpfx)tst-ftell-append.out: $(gen-locales)
|
|
$(objpfx)tst-ftell-partial-wide.out: $(gen-locales)
|
|
$(objpfx)tst-setvbuf1.out: $(gen-locales)
|
|
$(objpfx)tst-swscanf.out: $(gen-locales)
|
|
$(objpfx)tst-ungetwc1.out: $(gen-locales)
|
|
$(objpfx)tst-ungetwc2.out: $(gen-locales)
|
|
$(objpfx)tst-widetext.out: $(gen-locales)
|
|
$(objpfx)tst_wprintf2.out: $(gen-locales)
|
|
endif
|
|
|
|
$(objpfx)test-freopen.out: test-freopen.sh $(objpfx)test-freopen
|
|
$(SHELL) $< $(common-objpfx) '$(test-program-prefix)' \
|
|
$(common-objpfx)libio/ > $@; \
|
|
$(evaluate-test)
|
|
|
|
$(objpfx)tst-fopenloc-cmp.out: ../iconvdata/testdata/ISO-8859-1..UTF8 \
|
|
$(objpfx)tst-fopenloc.out
|
|
cmp $^ > $@; \
|
|
$(evaluate-test)
|
|
|
|
$(objpfx)test-fmemopen-mem.out: $(objpfx)test-fmemopen.out
|
|
$(common-objpfx)malloc/mtrace $(objpfx)test-fmemopen.mtrace > $@; \
|
|
$(evaluate-test)
|
|
|
|
$(objpfx)tst-fopenloc-mem.out: $(objpfx)tst-fopenloc.out
|
|
$(common-objpfx)malloc/mtrace $(objpfx)tst-fopenloc.mtrace > $@; \
|
|
$(evaluate-test)
|
|
|
|
$(objpfx)tst-bz22415-mem.out: $(objpfx)tst-bz22415.out
|
|
$(common-objpfx)malloc/mtrace $(objpfx)tst-bz22415.mtrace > $@; \
|
|
$(evaluate-test)
|