Siddhesh Poyarekar ae5062201d ungetc: Guarantee single char pushback ... The C standard requires that ungetc guarantees at least one pushback, but the malloc call to allocate the pushback buffer could fail, thus violating that requirement. Fix this by adding a single byte pushback buffer in the FILE struct that the pushback can fall back to if malloc fails. The side-effect is that if the initial malloc fails and the 1-byte fallback buffer is used, future resizing (if it succeeds) will be 2-bytes, 4-bytes and so on, which is suboptimal but it's after a malloc failure, so maybe even desirable. A future optimization here could be to have the pushback code use the single byte buffer first and only fall back to malloc for subsequent calls. Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Reviewed-by: Maciej W. Rozycki <macro@redhat.com>		2024-12-17 17:42:55 -05:00
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bits	ungetc: Guarantee single char pushback	2024-12-17 17:42:55 -05:00
Depend	…
Makefile	libio: Fix crash in fputws [BZ #20632]	2024-10-25 15:05:06 -03:00
Versions	…
__fbufsize.c	…
__flbf.c	…
__fpending.c	…
__fpurge.c	…
__freadable.c	…
__freading.c	…
__fsetlocking.c	…
__fwritable.c	…
__fwriting.c	…
bug-fopena+.c	…
bug-fseek.c	…
bug-ftell.c	…
bug-memstream1.c	…
bug-mmap-fflush.c	…
bug-rewind.c	…
bug-rewind2.c	…
bug-ungetc.c	…
bug-ungetc2.c	…
bug-ungetc3.c	…
bug-ungetc4.c	…
bug-ungetwc1.c	…
bug-ungetwc2.c	…
bug-wfflush.c	…
bug-wmemstream1.c	…
bug-wsetpos.c	libio/bug-wsetpos: Make the error message match the causing function	2024-05-13 12:50:48 +01:00
clearerr.c	…
clearerr_u.c	…
fcloseall.c	…
feof.c	…
feof_u.c	…
ferror.c	…
ferror_u.c	…
filedoalloc.c	…
fileno.c	…
fileops.c	ungetc: Guarantee single char pushback	2024-12-17 17:42:55 -05:00
fmemopen.c	…
fputc.c	…
fputc_u.c	…
fputwc.c	…
fputwc_u.c	…
freopen.c	Fix freopen handling of ,ccs= (bug 23675)	2024-09-05 20:08:10 +00:00
freopen64.c	Fix freopen handling of ,ccs= (bug 23675)	2024-09-05 20:08:10 +00:00
fseek.c	…
fseeko.c	…
fseeko64.c	…
ftello.c	…
ftello64.c	…
fwide.c	…
fwprintf.c	…
fwscanf.c	…
genops.c	ungetc: Guarantee single char pushback	2024-12-17 17:42:55 -05:00
getc.c	…
getc_u.c	…
getchar.c	…
getchar_u.c	…
getwc.c	…
getwc_u.c	…
getwchar.c	…
getwchar_u.c	…
iofclose.c	…
iofdopen.c	Remove memory leak in fdopen (bug 31840)	2024-06-04 14:42:06 +02:00
iofflush.c	…
iofflush_u.c	…
iofgetpos.c	…
iofgetpos64.c	…
iofgets.c	…
iofgets_u.c	…
iofgetws.c	…
iofgetws_u.c	…
iofopen.c	…
iofopen64.c	…
iofopncook.c	…
iofputs.c	…
iofputs_u.c	…
iofputws.c	…
iofputws_u.c	…
iofread.c	…
iofread_u.c	…
iofsetpos.c	…
iofsetpos64.c	…
ioftell.c	…
iofwide.c	…
iofwrite.c	…
iofwrite_u.c	…
iogetdelim.c	…
iogetline.c	…
iogets.c	…
iogetwline.c	…
iolibio.h	…
iopadn.c	…
iopopen.c	Silence most -Wzero-as-null-pointer-constant diagnostics	2024-11-25 16:45:59 -03:00
ioputs.c	…
ioseekoff.c	…
ioseekpos.c	…
iosetbuffer.c	…
iosetvbuf.c	…
ioungetc.c	…
ioungetwc.c	…
iovdprintf.c	…
iovsprintf.c	…
iovsscanf.c	…
iovswscanf.c	…
iowpadn.c	…
libc_fatal.c	…
libio-macros.sym	…
libio.h	…
libioP.h	ungetc: Guarantee single char pushback	2024-12-17 17:42:55 -05:00
memstream.c	…
obprintf.c	…
oldfileops.c	ungetc: Guarantee single char pushback	2024-12-17 17:42:55 -05:00
oldfmemopen.c	…
oldiofclose.c	…
oldiofdopen.c	…
oldiofgetpos.c	…
oldiofgetpos64.c	…
oldiofopen.c	…
oldiofsetpos.c	…
oldiofsetpos64.c	…
oldiopopen.c	…
oldpclose.c	…
oldstdfiles.c	Change _IO_stderr_/_IO_stdin_/_IO_stdout to compat symbols [BZ #31766]	2024-05-21 10:12:25 -07:00
oldtmpfile.c	posix: Sync tempname with gnulib	2024-04-10 14:53:39 -03:00
pclose.c	…
peekc.c	…
putc.c	…
putc_u.c	…
putchar.c	…
putchar_u.c	…
putwc.c	…
putwc_u.c	…
putwchar.c	…
putwchar_u.c	…
rewind.c	…
setbuf.c	…
setlinebuf.c	…
stdfiles.c	Use a doubly-linked list for _IO_list_all (bug 27777)	2024-05-17 14:13:25 -07:00
stdio.c	…
stdio.h	<stdio.h>: Acknowledge that getdelim/getline are in POSIX	2024-06-11 22:17:12 +01:00
strfile.h	…
strops.c	…
swprintf.c	…
swscanf.c	…
test-fmemopen.c	…
test-fputs-unbuffered-full.c	libio: Fix crash in fputws [BZ #20632]	2024-10-25 15:05:06 -03:00
test-fputws-unbuffered-full.c	libio: Fix crash in fputws [BZ #20632]	2024-10-25 15:05:06 -03:00
test-freopen.c	…
test-freopen.sh	…
tst-atime.c	…
tst-bz22415.c	…
tst-bz24051.c	…
tst-bz24153.c	…
tst-bz24228.c	…
tst-bz24228.map	…
tst-bz28828.c	…
tst-bz28828.input	…
tst-cleanup-default-static.c	…
tst-cleanup-default.c	…
tst-cleanup-nostart-stop-gc-static.c	…
tst-cleanup-nostart-stop-gc.c	…
tst-cleanup-start-stop-gc-static.c	…
tst-cleanup-start-stop-gc.c	…
tst-cleanup.c	…
tst-cleanup.exp	…
tst-closeall.c	libio: handle opening a file when all files are closed (bug 31963)	2024-07-09 10:12:36 +02:00
tst-eof.c	…
tst-ext.c	…
tst-ext2.c	…
tst-fclose-unopened.c	Add another test for fclose on an unopened file	2024-09-20 10:32:35 -04:00
tst-fclose-unopened2.c	Add another test for fclose on an unopened file	2024-09-20 10:32:35 -04:00
tst-fclose-unopened2.input	Add another test for fclose on an unopened file	2024-09-20 10:32:35 -04:00
tst-fdopen-seek-failure.c	libio: Test for fdopen memory leak without SEEK_END support (bug 31840)	2024-06-04 16:09:33 +02:00
tst-fgetc-after-eof.c	…
tst-fgetwc.c	…
tst-fgetwc.input	…
tst-fgetws.c	…
tst-fopen-compat.c	libio: Set _vtable_offset before calling _IO_link_in [BZ #32148]	2024-10-01 07:31:25 +08:00
tst-fopenloc.c	…
tst-fopenloc2.c	…
tst-fputws.c	…
tst-freopen.c	…
tst-fseek.c	…
tst-ftell-active-handler.c	…
tst-ftell-append.c	…
tst-ftell-partial-wide.c	…
tst-fwrite-error.c	…
tst-getdelim.c	libio/tst-getdelim: Add new test covering NUL as a delimiter	2024-08-14 11:48:34 +02:00
tst-memstream.h	…
tst-memstream1.c	…
tst-memstream2.c	…
tst-memstream3.c	…
tst-memstream4.c	…
tst-mmap-eofsync.c	…
tst-mmap-fflushsync.c	…
tst-mmap-offend.c	…
tst-mmap-setvbuf.c	…
tst-mmap2-eofsync.c	…
tst-popen-fork.c	libio: Fix a deadlock after fork in popen	2024-10-23 13:40:16 +02:00
tst-popen1.c	…
tst-setvbuf1.c	…
tst-sprintf-chk-ub.c	…
tst-sprintf-ub.c	…
tst-sscanf.c	…
tst-stderr-compat.c	Add crt1-2.0.o for glibc 2.0 compatibility tests	2024-05-06 07:49:40 -07:00
tst-swscanf.c	…
tst-ungetwc1.c	…
tst-ungetwc2.c	…
tst-vtables-common.c	…
tst-vtables-interposed.c	…
tst-vtables.c	…
tst-wfile-sync.c	…
tst-widetext.c	…
tst-widetext.input	…
tst-wmemstream1.c	…
tst-wmemstream2.c	…
tst-wmemstream3.c	…
tst-wmemstream4.c	…
tst-wmemstream5.c	…
tst_getwc.c	…
tst_getwc.input	…
tst_putwc.c	…
tst_swprintf.c	…
tst_swscanf.c	…
tst_wprintf.c	…
tst_wprintf2.c	…
tst_wscanf.c	…
tst_wscanf.input	…
vasprintf.c	…
vscanf.c	…
vsnprintf.c	…
vswprintf.c	…
vtables.c	…
vwprintf.c	…
vwscanf.c	…
wfiledoalloc.c	…
wfileops.c	ungetc: Guarantee single char pushback	2024-12-17 17:42:55 -05:00
wgenops.c	Silence most -Wzero-as-null-pointer-constant diagnostics	2024-11-25 16:45:59 -03:00
wmemstream.c	…
wprintf.c	…
wscanf.c	…
wstrops.c	…