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The offset computation in write mode uses the fact that _IO_read_end is kept in sync with the external file offset. This however is not true when O_APPEND is in effect since switching to write mode ought to send the external file offset to the end of file without making the necessary adjustment to _IO_read_end. Hence in append mode, offset computation when writing should only consider the effect of unflushed writes, i.e. from _IO_write_base to _IO_write_ptr. The wiki has a detailed document that describes the rationale for offsets returned by ftell in various conditions: https://sourceware.org/glibc/wiki/File%20offsets%20in%20a%20stdio%20stream%20and%20ftell
203 lines
7.4 KiB
Makefile
203 lines
7.4 KiB
Makefile
# Copyright (C) 1995-2014 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Specific makefile for libio.
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#
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subdir := libio
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include ../Makeconfig
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headers := stdio.h libio.h _G_config.h bits/stdio.h bits/stdio-lock.h \
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bits/sys_errlist.h bits/stdio2.h bits/stdio-ldbl.h bits/libio-ldbl.h
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routines := \
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filedoalloc iofclose iofdopen iofflush iofgetpos iofgets iofopen \
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iofopncook iofputs iofread iofsetpos ioftell wfiledoalloc \
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iofwrite iogetdelim iogetline iogets iopadn iopopen ioputs \
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ioseekoff ioseekpos iosetbuffer iosetvbuf ioungetc \
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iovsprintf iovsscanf \
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iofgetpos64 iofopen64 iofsetpos64 \
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fputwc fputwc_u getwc getwc_u getwchar getwchar_u iofgetws iofgetws_u \
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iofputws iofputws_u iogetwline iowpadn ioungetwc putwc putwc_u \
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putwchar putwchar_u putchar putchar_u fwprintf swprintf vwprintf \
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wprintf wscanf fwscanf vwscanf vswprintf iovswscanf swscanf wgenops \
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wstrops wfileops iofwide fwide wmemstream \
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\
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clearerr feof ferror fileno fputc freopen fseek getc getchar \
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memstream pclose putc putchar rewind setbuf setlinebuf vasprintf \
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iovdprintf vscanf vsnprintf obprintf fcloseall fseeko ftello \
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freopen64 fseeko64 ftello64 \
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\
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__fbufsize __freading __fwriting __freadable __fwritable __flbf \
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__fpurge __fpending __fsetlocking \
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\
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libc_fatal fmemopen
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tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc \
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tst_wprintf2 tst-widetext test-fmemopen tst-ext tst-ext2 \
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tst-fgetws tst-ungetwc1 tst-ungetwc2 tst-swscanf tst-sscanf \
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tst-mmap-setvbuf bug-ungetwc1 bug-ungetwc2 tst-atime tst-eof \
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tst-freopen bug-rewind bug-rewind2 bug-ungetc bug-fseek \
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tst-mmap-eofsync tst-mmap-fflushsync bug-mmap-fflush \
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tst-mmap2-eofsync tst-mmap-offend bug-fopena+ bug-wfflush \
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bug-ungetc2 bug-ftell bug-ungetc3 bug-ungetc4 tst-fopenloc2 \
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tst-memstream1 tst-memstream2 \
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tst-wmemstream1 tst-wmemstream2 \
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bug-memstream1 bug-wmemstream1 \
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tst-setvbuf1 tst-popen1 tst-fgetwc bug-wsetpos tst-fseek \
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tst-fwrite-error tst-ftell-partial-wide tst-ftell-active-handler \
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tst-ftell-append
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ifeq (yes,$(build-shared))
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# Add test-fopenloc only if shared library is enabled since it depends on
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# shared localedata objects.
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tests += tst-fopenloc
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endif
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test-srcs = test-freopen
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ifeq ($(build-shared),yes)
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routines += oldiofopen oldiofdopen oldiofclose oldiopopen oldpclose \
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oldtmpfile oldiofgetpos oldiofgetpos64 oldiofsetpos \
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oldiofsetpos64
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endif
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ifeq (yes,$(libc-reentrant))
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routines += clearerr_u feof_u ferror_u fputc_u getc_u getchar_u \
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iofflush_u putc_u putchar_u peekc iofread_u iofwrite_u iofgets_u \
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iofputs_u
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endif
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CPPFLAGS += $(libio-mtsafe)
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# Support for exception handling.
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CFLAGS-fileops.c = $(exceptions)
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CFLAGS-fputc.c = $(exceptions)
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CFLAGS-fputwc.c = $(exceptions)
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CFLAGS-freopen64.c = $(exceptions)
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CFLAGS-freopen.c = $(exceptions)
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CFLAGS-fseek.c = $(exceptions)
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CFLAGS-fseeko64.c = $(exceptions)
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CFLAGS-fseeko.c = $(exceptions)
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CFLAGS-ftello64.c = $(exceptions)
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CFLAGS-ftello.c = $(exceptions)
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CFLAGS-fwide.c = $(exceptions)
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CFLAGS-genops.c = $(exceptions)
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CFLAGS-getc.c = $(exceptions)
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CFLAGS-getchar.c = $(exceptions)
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CFLAGS-getwc.c = $(exceptions)
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CFLAGS-getwchar.c = $(exceptions)
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CFLAGS-iofclose.c = $(exceptions)
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CFLAGS-iofflush.c = $(exceptions)
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CFLAGS-iofgetpos64.c = $(exceptions)
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CFLAGS-iofgetpos.c = $(exceptions)
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CFLAGS-iofgets.c = $(exceptions)
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CFLAGS-iofgetws.c = $(exceptions)
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CFLAGS-iofputs.c = $(exceptions)
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CFLAGS-iofputws.c = $(exceptions)
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CFLAGS-iofread.c = $(exceptions)
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CFLAGS-iofsetpos64.c = $(exceptions)
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CFLAGS-iofsetpos.c = $(exceptions)
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CFLAGS-ioftell.c = $(exceptions)
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CFLAGS-iofwrite.c = $(exceptions)
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CFLAGS-iogetdelim.c = $(exceptions)
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CFLAGS-iogetline.c = $(exceptions)
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CFLAGS-iogets.c = $(exceptions)
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CFLAGS-iogetwline.c = $(exceptions)
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CFLAGS-ioputs.c = $(exceptions)
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CFLAGS-ioseekoff.c = $(exceptions)
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CFLAGS-ioseekpos.c = $(exceptions)
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CFLAGS-iosetbuffer.c = $(exceptions)
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CFLAGS-iosetvbuf.c = $(exceptions)
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CFLAGS-ioungetc.c = $(exceptions)
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CFLAGS-ioungetwc.c = $(exceptions)
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CFLAGS-oldfileops.c = $(exceptions)
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CFLAGS-oldiofclose.c = $(exceptions)
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CFLAGS-oldiofgetpos64.c = $(exceptions)
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CFLAGS-oldiofgetpos.c = $(exceptions)
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CFLAGS-oldiofsetpos64.c = $(exceptions)
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CFLAGS-oldiofsetpos.c = $(exceptions)
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CFLAGS-peekc.c = $(exceptions)
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CFLAGS-putc.c = $(exceptions)
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CFLAGS-putchar.c = $(exceptions)
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CFLAGS-putwc.c = $(exceptions)
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CFLAGS-putwchar.c = $(exceptions)
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CFLAGS-rewind.c = $(exceptions)
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CFLAGS-wfileops.c = $(exceptions)
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CFLAGS-wgenops.c = $(exceptions)
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CFLAGS-oldiofopen.c = $(exceptions)
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CFLAGS-iofopen.c = $(exceptions)
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CFLAGS-iofopen64.c = $(exceptions)
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CFLAGS-oldtmpfile.c = $(exceptions)
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# XXX Do we need filedoalloc and wfiledoalloc? Others?
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CFLAGS-tst_putwc.c = -DOBJPFX=\"$(objpfx)\"
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tst_wprintf2-ARGS = "Some Text"
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tst-widetext-ENV = LOCPATH=$(common-objpfx)localedata LANGUAGE=C
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tst-fopenloc-ENV = LOCPATH=$(common-objpfx)localedata \
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MALLOC_TRACE=$(objpfx)tst-fopenloc.mtrace
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tst-fgetws-ENV = LOCPATH=$(common-objpfx)localedata
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tst-ungetwc1-ENV = LOCPATH=$(common-objpfx)localedata
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tst-ungetwc2-ENV = LOCPATH=$(common-objpfx)localedata
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bug-ungetwc2-ENV = LOCPATH=$(common-objpfx)localedata
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tst-swscanf-ENV = LOCPATH=$(common-objpfx)localedata
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bug-ftell-ENV = LOCPATH=$(common-objpfx)localedata
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tst-fgetwc-ENV = LOCPATH=$(common-objpfx)localedata
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tst-fseek-ENV = LOCPATH=$(common-objpfx)localedata
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tst-ftell-partial-wide-ENV = LOCPATH=$(common-objpfx)localedata
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tst-ftell-active-handler-ENV = LOCPATH=$(common-objpfx)localedata
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tst-ftell-append-ENV = LOCPATH=$(common-objpfx)localedata
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generated += tst-fopenloc.mtrace tst-fopenloc.check
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aux := fileops genops stdfiles stdio strops
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ifeq ($(build-shared),yes)
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aux += oldfileops oldstdfiles
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endif
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shared-only-routines = oldiofopen oldiofdopen oldiofclose oldfileops \
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oldstdfiles oldiopopen oldpclose oldtmpfile \
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oldiofgetpos oldiofgetpos64 oldiofsetpos \
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oldiofsetpos64
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ifeq ($(run-built-tests),yes)
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tests-special += $(objpfx)test-freopen.out
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ifeq (yes,$(build-shared))
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# Run tst-fopenloc-cmp.out and tst-openloc-mem.out only if shared
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# library is enabled since they depend on tst-fopenloc.out.
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tests-special += $(objpfx)tst-fopenloc-cmp.out $(objpfx)tst-fopenloc-mem.out
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endif
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endif
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include ../Rules
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$(objpfx)test-freopen.out: test-freopen.sh $(objpfx)test-freopen
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$(SHELL) $< $(common-objpfx) '$(test-program-prefix)' \
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$(common-objpfx)libio/; \
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$(evaluate-test)
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$(objpfx)tst-fopenloc-cmp.out: ../iconvdata/testdata/ISO-8859-1..UTF8 \
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$(objpfx)tst-fopenloc.out
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cmp $^ > $@; \
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$(evaluate-test)
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$(objpfx)tst-fopenloc-mem.out: $(objpfx)tst-fopenloc.out
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$(common-objpfx)malloc/mtrace $(objpfx)tst-fopenloc.mtrace > $@; \
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$(evaluate-test)
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