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author | Zack Weinberg <zackw@panix.com> | 2018-03-07 14:32:03 -0500 |
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committer | Gabriel F. T. Gomes <gabriel@inconstante.eti.br> | 2018-12-05 18:15:43 -0200 |
commit | 4e2f43f842ef5e253cc23383645adbaa03cedb86 (patch) | |
tree | ca359423ba6ed4bb4d5ec247905a6ee13d456864 /stdio-common/tstscanf.c | |
parent | 124fc732c15ef37b7ee9db25b1e9f9b20c799623 (diff) | |
download | glibc-4e2f43f842ef5e253cc23383645adbaa03cedb86.tar.gz glibc-4e2f43f842ef5e253cc23383645adbaa03cedb86.tar.xz glibc-4e2f43f842ef5e253cc23383645adbaa03cedb86.zip |
Use PRINTF_FORTIFY instead of _IO_FLAGS2_FORTIFY (bug 11319)
The _chk variants of all of the printf functions become much simpler. This is the last thing that we needed _IO_acquire_lock_clear_flags2 for, so it can go as well. I took the opportunity to make the headers included and the names of all local variables consistent across all the affected files. Since we ultimately want to get rid of __no_long_double as well, it must be possible to get all of the nontrivial effects of the _chk functions by calling the _internal functions with appropriate flags. For most of the __(v)xprintf_chk functions, this is covered by PRINTF_FORTIFY plus some up-front argument checks that can be duplicated. However, __(v)sprintf_chk installs a custom jump table so that it can crash instead of overflowing the output buffer. This functionality is moved to __vsprintf_internal, which now has a 'maxlen' argument like __vsnprintf_internal; to get the unsafe behavior of ordinary (v)sprintf, pass -1 for that argument. obstack_printf_chk and obstack_vprintf_chk are no longer in the same file. As a side-effect of the unification of both fortified and non-fortified vdprintf initialization, this patch fixes bug 11319 for __dprintf_chk and __vdprintf_chk, which was previously fixed only for dprintf and vdprintf by the commit commit 7ca890b88e6ab7624afb1742a9fffb37ad5b3fc3 Author: Ulrich Drepper <drepper@redhat.com> Date: Wed Feb 24 16:07:57 2010 -0800 Fix reporting of I/O errors in *dprintf functions. This patch adds a test case to avoid regressions. Tested for powerpc and powerpc64le.
Diffstat (limited to 'stdio-common/tstscanf.c')
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