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(__argp_fmtstream_printf): Correct check for snprintf return value.

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This commit is contained in:
Ulrich Drepper 1999-11-10 08:13:45 +00:00
parent 52f5ad999e
commit 301321dbbf
1 changed files with 7 additions and 4 deletions
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11
argp/argp-fmtstream.c
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@ -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;