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authorUlrich Drepper <drepper@redhat.com>1999-11-10 08:15:19 +0000
committerUlrich Drepper <drepper@redhat.com>1999-11-10 08:15:19 +0000
commitb9d3d9f726a79f0c1091e80cfb21e27eaed130c0 (patch)
treeb4bffa1c2f8ab000bc31b745dfbfab91f6410c4d /argp/argp-fmtstream.c
parent2864e767053317538feafa815046fff89e5a16be (diff)
downloadglibc-b9d3d9f726a79f0c1091e80cfb21e27eaed130c0.tar.gz
Update.
1999-11-10 Andreas Jaeger <aj@suse.de> * string/strsignal.c (strsignal): Correct check for snprintf return value. * argp/argp-fmtstream.c (__argp_fmtstream_printf): Likewise. * misc/efgcvt_r.c (APPEND): Correct check for too small buffer according to changed snprintf return value. Reported by Lawrence K. Chen <lchen@opentext.com>. * misc/tst-efgcvt.c (special): Add tests for a too small buffer for ecvt_r and fcvt_r.
Diffstat (limited to 'argp/argp-fmtstream.c')
-rw-r--r--argp/argp-fmtstream.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/argp/argp-fmtstream.c b/argp/argp-fmtstream.c
index d563c31b8e..ae547b0acb 100644
--- a/argp/argp-fmtstream.c
+++ b/argp/argp-fmtstream.c
@@ -1,5 +1,5 @@
/* Word-wrapping and line-truncating streams
- Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Miles Bader <miles@gnu.ai.mit.edu>.
@@ -362,6 +362,7 @@ ssize_t
__argp_fmtstream_printf (struct argp_fmtstream *fs, const char *fmt, ...)
{
int out;
+ size_t avail;
size_t size_guess = PRINTF_SIZE_GUESS; /* How much space to reserve. */
do
@@ -370,13 +371,15 @@ __argp_fmtstream_printf (struct argp_fmtstream *fs, const char *fmt, ...)
if (! __argp_fmtstream_ensure (fs, size_guess))
return -1;
- size_guess += size_guess;
va_start (args, fmt);
- out = __vsnprintf (fs->p, fs->end - fs->p, fmt, args);
+ avail = fs->end - fs->p;
+ out = __vsnprintf (fs->p, avail, fmt, args);
va_end (args);
+ if (out >= avail)
+ size_guess = out + 1;
}
- while (out == -1);
+ while (out >= avail);
fs->p += out;