diff options
Diffstat (limited to 'libio/filedoalloc.c')
| -rw-r--r-- | libio/filedoalloc.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/libio/filedoalloc.c b/libio/filedoalloc.c index 1cabae83b5..c2e849a736 100644 --- a/libio/filedoalloc.c +++ b/libio/filedoalloc.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1993, 1997 Free Software Foundation, Inc. +/* Copyright (C) 1993, 1997, 2001 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -58,6 +58,8 @@ #ifdef _LIBC # undef isatty # define isatty(Fd) __isatty (Fd) + +# include <device-nrs.h> #endif /* @@ -73,7 +75,6 @@ _IO_file_doallocate (fp) _IO_FILE *fp; { _IO_size_t size; - int couldbetty; char *p; struct _G_stat64 st; @@ -82,31 +83,29 @@ _IO_file_doallocate (fp) function it points to. This is to make sure _IO_cleanup gets called on exit. We call it from _IO_file_doallocate, since that is likely to get called by any program that does buffered I/O. */ - if (_IO_cleanup_registration_needed) + if (__builtin_expect (_IO_cleanup_registration_needed != NULL, 0)) (*_IO_cleanup_registration_needed) (); #endif - if (fp->_fileno < 0 || _IO_SYSSTAT (fp, &st) < 0) + size = _IO_BUFSIZ; + if (fp->_fileno >= 0 && __builtin_expect (_IO_SYSSTAT (fp, &st), 0) >= 0) { - couldbetty = 0; - size = _IO_BUFSIZ; -#if 0 - /* do not try to optimise fseek() */ - fp->_flags |= __SNPT; + if (S_ISCHR (st.st_mode)) + { + /* Possibly a tty. */ + if ( +#ifdef DEV_TTY_P + DEV_TTY_P (st.st_rdev) || #endif - } - else - { - couldbetty = S_ISCHR (st.st_mode); + isatty (fp->_fileno)) + fp->_flags |= _IO_LINE_BUF; + } #if _IO_HAVE_ST_BLKSIZE - size = st.st_blksize <= 0 ? _IO_BUFSIZ : st.st_blksize; -#else - size = _IO_BUFSIZ; + if (st.st_blksize > 0) + size = st.st_blksize; #endif } ALLOC_BUF (p, size, EOF); _IO_setb (fp, p, p + size, 1); - if (couldbetty && isatty (fp->_fileno)) - fp->_flags |= _IO_LINE_BUF; return 1; } |