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glibc/stdio-common
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Adhemerval Zanella b65b205fbc libio: Fix fmemopen append mode failure (BZ# 20012) 
The fmemopen implementation does not account the file position correctly in
append mode. The following example shows the failure:

===
int main ()
{
  char buf[10] = "test";
  FILE *fp = fmemopen (buf, 10, "a+");
  fseek (fp, 0, SEEK_SET);

  int gr;
  if ((gr = getc (fp)) != 't' ||
      (gr = getc (fp)) != 'e' ||
      (gr = getc (fp)) != 's' ||
      (gr = getc (fp)) != 't' ||
      (gr = getc (fp)) != EOF)
    {
      printf ("%s: getc failed returned %i\n", __FUNCTION__, gr);
      return 1;
    }

  return 0;
}
===

This is due both how read and write operation update the buffer position,
taking in consideration buffer lenght instead of maximum position defined
by the open mode.  This patch fixes it and also fixes fseek not returning
EINVAL for invalid whence modes.

Tested on x86_64 and i686.

	[BZ #20012]
	* libio/fmemopen.c (fmemopen_read): Use buffer maximum position, not
	length to calculate the buffer to read.
	(fmemopen_write): Set the buffer position based on bytes written.
	(fmemopen_seek): Return EINVAL for invalid whence modes.
2016-04-29 19:25:17 -03:00
..
bits Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
_i18n_number.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
_itoa.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
_itowa.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
_itowa.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
asprintf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bug1.c Update. 1999-07-17 23:56:47 +00:00
bug1.input
bug2.c
bug3.c
bug4.c
bug5.c Update. 1998-07-04 10:39:13 +00:00
bug6.c
bug6.input
bug7.c
bug8.c
bug9.c
bug10.c
bug11.c
bug12.c Update. 1998-06-15 14:55:03 +00:00
bug13.c Update. 2000-07-29 06:45:51 +00:00
bug14.c Update. 2003-01-28 07:32:19 +00:00
bug16.c Remove trailing whitespace. 2013-06-05 20:44:03 +00:00
bug17.c [BZ #3902] 2007-01-22 16:18:03 +00:00
bug18.c * libio/wstrops.c (_IO_wstr_underflow): Clear errno before 2007-07-07 21:38:43 +00:00
bug18a.c * libio/wstrops.c (_IO_wstr_underflow): Clear errno before 2007-07-07 21:38:43 +00:00
bug19.c * stdio-common/vfscanf.c (_IO_vfscanf): Add additional test for EOF 2007-07-08 04:41:34 +00:00
bug19a.c * stdio-common/vfscanf.c (_IO_vfscanf): Add additional test for EOF 2007-07-08 04:41:34 +00:00
bug20.c * stdio-common/Makefile (tests): Add bug20. 2007-10-28 16:45:27 +00:00
bug21.c Add macros for diagnostic control, use for scanf %a tests. 2014-12-10 00:41:19 +00:00
bug22.c Bump up stdio bug22 timeout from 30 seconds to 60 seconds 2012-05-17 12:59:08 -04:00
bug23-2.c CVE-2012-3406: Stack overflow in vfprintf [BZ #16617] 2014-12-15 10:09:33 +01:00
bug23-3.c CVE-2012-3406: Stack overflow in vfprintf [BZ #16617] 2014-12-15 10:09:33 +01:00
bug23-4.c CVE-2012-3406: Stack overflow in vfprintf [BZ #16617] 2014-12-15 10:09:33 +01:00
bug23.c Fix allocation when handling positional parameters in printf. 2011-02-20 07:59:49 -05:00
bug24.c Add test for BZ 13114 2011-08-20 09:22:16 -04:00
bug25.c 2012-05-24 Jeff Law <law@redhat.com> 2012-05-24 21:30:43 -06:00
bug26.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bug-vfprintf-nargs.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ctermid.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
cuserid.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Depend Update. 2000-07-29 06:45:51 +00:00
dprintf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
errlist.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
errnobug.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
flockfile.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fprintf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fscanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ftrylockfile.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
funlockfile.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fxprintf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
getline.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
getw.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
isoc99_fscanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
isoc99_scanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
isoc99_sscanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
isoc99_vfscanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
isoc99_vscanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
isoc99_vsscanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
itoa-digits.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
itoa-udigits.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
itowa-digits.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Makefile libio: Update internal fmemopen position after write (BZ #20005) 2016-04-26 17:40:25 -03:00
perror.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
printf_fp.c Fix strfmon_l: Use specified locale for number formatting [BZ #19633] 2016-04-14 12:21:53 +02:00
printf_fphex.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
printf_size.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
printf-parse.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
printf-parsemb.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
printf-parsewc.c Update. 2003-06-11 23:22:36 +00:00
printf-prs.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
printf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
printf.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
psiginfo-data.h Fix typos. 2013-10-12 14:47:50 +02:00
psiginfo-define.h * locale/langinfo.h: nl_langinfo_l is in POSIX 2008. 2009-02-26 06:18:24 +00:00
psiginfo.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
psignal.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
putw.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
reg-modifier.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
reg-printf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
reg-type.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
remove.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
rename.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
renameat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
scanf1.c
scanf2.c
scanf3.c
scanf4.c Eliminate -Wno-format from printf/scanf tests. 2014-12-11 13:47:44 -08:00
scanf5.c * tst-trans.c: Include <stdlib.h> and <string.h>. 2000-06-21 12:39:22 +00:00
scanf7.c Eliminate -Wno-format from printf/scanf tests. 2014-12-11 13:47:44 -08:00
scanf8.c
scanf9.c Update. 2000-12-15 16:03:57 +00:00
scanf10.c
scanf11.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
scanf12.c Update. 2000-07-22 07:26:13 +00:00
scanf12.input Update. 1999-02-07 00:06:12 +00:00
scanf13.c Avoid warning in scanf test. 2009-10-30 09:23:24 -07:00
scanf14.c Add macros for diagnostic control, use for scanf %a tests. 2014-12-10 00:41:19 +00:00
scanf15.c Don't include <bits/stdio-lock.h> from installed <libio.h>. 2015-09-03 20:24:54 +00:00
scanf16.c * libio/stdio.h (vscanf): Fix -std=c99 redirect. 2008-05-24 18:14:36 +00:00
scanf17.c Don't include <bits/stdio-lock.h> from installed <libio.h>. 2015-09-03 20:24:54 +00:00
scanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
siglist.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
snprintf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sprintf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sscanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
stdio_ext.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
stdio_lim.h.in Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tempnam.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tempname.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
temptest.c * malloc/memusagestat.c (main): Use return instead of exit to 2000-12-31 10:52:32 +00:00
test_rdwr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-fseek.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-fwrite.c Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
test-popen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-vfprintf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tfformat.c Avoid use of "register" as optimization hint. 2013-06-07 22:24:35 +00:00
tiformat.c Update. 2000-06-17 19:22:43 +00:00
tllformat.c Update. 1999-02-14 20:03:55 +00:00
tmpfile64.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tmpfile.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tmpnam_r.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tmpnam.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-cookie.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-fdopen.c Update. 2002-12-17 10:34:02 +00:00
tst-ferror.c Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
tst-ferror.input
tst-fgets.c * posix/tst-execle1.c (do_test): Add a const. 2005-12-27 22:50:12 +00:00
tst-fileno.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-fmemopen2.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-fmemopen3.c libio: Fix fmemopen append mode failure (BZ# 20012) 2016-04-29 19:25:17 -03:00
tst-fmemopen4.c libio: Update internal fmemopen position after write (BZ #20005) 2016-04-26 17:40:25 -03:00
tst-fmemopen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-fphex-wide.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-fphex.c Clean up tst-fphex test 2012-03-08 03:02:24 -05:00
tst-fseek.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-fwrite.c [BZ #1078] 2005-09-27 19:40:49 +00:00
tst-gets.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-gets.input Update. 2001-02-15 19:57:43 +00:00
tst-grouping.c Fix grouping when rounding increases number of integer digits. 2011-01-12 20:37:51 -05:00
tst-long-dbl-fphex.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-obprintf.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-perror.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-popen2.c * libio/iopopen.c (_IO_new_proc_open): Don't close child_std_end 2007-07-19 17:03:08 +00:00
tst-popen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-printf-bz18872.sh Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-printf-round.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-printf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-printf.sh Make shebang interpreter directives consistent 2016-01-07 04:03:21 -05:00
tst-printfsz.c Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
tst-put-error.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-rndseek.c 2002-10-12 Roland McGrath <roland@redhat.com> 2002-10-12 18:45:26 +00:00
tst-setvbuf1.c * stdio-common/Makefile: Add rules to build and run tst-setvbuf1. 2008-07-08 16:32:55 +00:00
tst-setvbuf1.expect * stdio-common/Makefile: Add rules to build and run tst-setvbuf1. 2008-07-08 16:32:55 +00:00
tst-sprintf2.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-sprintf3.c Increase internal precision of ldbl-128ibm decimal printf [BZ #19853] 2016-03-31 12:14:33 -05:00
tst-sprintf.c stdio-common: Include <libc-internal.h> in some tests 2014-12-15 11:29:09 -06:00
tst-sscanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-swprintf.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-swscanf.c * stdio-common/Makefile (tests): Add tst-swscanf. 2007-02-18 09:21:24 +00:00
tst-tmpnam.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-unbputc.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-unbputc.sh Make shebang interpreter directives consistent 2016-01-07 04:03:21 -05:00
tst-ungetc.c Update. 2002-12-19 09:18:01 +00:00
tst-unlockedio.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-vfprintf-width-prec.c vfprintf: Fix memory with large width and precision [BZ #19931] 2016-04-25 14:10:26 +02:00
tst-wc-printf.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tstdiomisc.c Eliminate -Wno-format from printf/scanf tests. 2014-12-11 13:47:44 -08:00
tstgetln.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tstgetln.input
tstscanf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tstscanf.input
Versions Add missing } in Versions file. 2014-02-28 11:07:43 -08:00
vfprintf.c vfprintf: Fix memory with large width and precision [BZ #19931] 2016-04-25 14:10:26 +02:00
vfscanf.c Silence some false positive warnings for gcc 4.7 2016-01-21 09:11:17 -05:00
vfwprintf.c Update. 1999-06-16 22:55:47 +00:00
vfwscanf.c Update. 2000-06-29 04:12:28 +00:00
vprintf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
xbug.c Convert 703 function definitions to prototype style. 2015-10-16 20:21:49 +00:00