diff options
Diffstat (limited to 'gnulib/lib/fseeko.c')
| -rw-r--r-- | gnulib/lib/fseeko.c | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/gnulib/lib/fseeko.c b/gnulib/lib/fseeko.c index e11e49ad1..7ba8e5843 100644 --- a/gnulib/lib/fseeko.c +++ b/gnulib/lib/fseeko.c @@ -1,5 +1,5 @@ /* An fseeko() function that, together with fflush(), is POSIX compliant. - Copyright (C) 2007-2008 Free Software Foundation, Inc. + Copyright (C) 2007-2009 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by @@ -86,7 +86,14 @@ rpl_fseeko (FILE *fp, off_t offset, int whence) #error "Please port gnulib fseeko.c to your platform! Look at the code in fpurge.c, then report this to bug-gnulib." #endif { - off_t pos = lseek (fileno (fp), offset, whence); + /* We get here when an fflush() call immediately preceded this one. We + know there are no buffers. + POSIX requires us to modify the file descriptor's position. + But we cannot position beyond end of file here. */ + off_t pos = + lseek (fileno (fp), + whence == SEEK_END && offset > 0 ? 0 : offset, + whence); if (pos == -1) { #if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */ @@ -94,20 +101,22 @@ rpl_fseeko (FILE *fp, off_t offset, int whence) #endif return -1; } - else - { -#if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */ - fp_->_offset = pos; - fp_->_flags |= __SOFF; - fp_->_flags &= ~__SEOF; + +#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ + fp->_flags &= ~_IO_EOF_SEEN; +#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */ + fp_->_offset = pos; + fp_->_flags |= __SOFF; + fp_->_flags &= ~__SEOF; #elif defined __EMX__ /* emx+gcc */ - fp->_flags &= ~_IOEOF; + fp->_flags &= ~_IOEOF; #elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */ - fp->_flag &= ~_IOEOF; + fp->_flag &= ~_IOEOF; #endif - return 0; - } + /* If we were not requested to position beyond end of file, we're + done. */ + if (!(whence == SEEK_END && offset > 0)) + return 0; } - else - return fseeko (fp, offset, whence); + return fseeko (fp, offset, whence); } |