diff options
| author | Thomas Koenig <Thomas.Koenig@online.de> | 2005-07-12 19:52:19 +0000 |
|---|---|---|
| committer | Thomas Koenig <tkoenig@gcc.gnu.org> | 2005-07-12 19:52:19 +0000 |
| commit | 5133e4b923b5648cc7fc2f27bb03f02855dbbe94 (patch) | |
| tree | da374bb9ec1399b596949ba90944c887ee748ce6 /libgfortran/io | |
| parent | 04be5ce5ec84b1dab39372f89d59888988a3195e (diff) | |
| download | gcc-5133e4b923b5648cc7fc2f27bb03f02855dbbe94.tar.gz | |
io/unix.c: Add member special_file to type unix_stream.
2005-07-12 Thomas Koenig <Thomas.Koenig@online.de>
io/unix.c: Add member special_file to type unix_stream.
(fd_truncate): Don't call ftruncate or chsize if
s refers to a special file.
(fd_to_stream): initialize s->special_file.
2005-07-12 Thomas Koenig <Thomas.Koenig@online.de>
gfortran.dg/dev_null.f90: Remove targets.
From-SVN: r101937
Diffstat (limited to 'libgfortran/io')
| -rw-r--r-- | libgfortran/io/unix.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/libgfortran/io/unix.c b/libgfortran/io/unix.c index 1158458879e..b35182d6169 100644 --- a/libgfortran/io/unix.c +++ b/libgfortran/io/unix.c @@ -138,6 +138,8 @@ typedef struct int prot; int ndirty; /* Dirty bytes starting at dirty_offset */ + int special_file; /* =1 if the fd refers to a special file */ + unsigned unbuffered:1, mmaped:1; char small_buffer[BUFFER_SIZE]; @@ -509,13 +511,14 @@ fd_truncate (unix_stream * s) return FAILURE; /* non-seekable files, like terminals and fifo's fail the lseek. - the fd is a regular file at this point */ - + Using ftruncate on a seekable special file (like /dev/null) + is undefined, so we treat it as if the ftruncate failed. + */ #ifdef HAVE_FTRUNCATE - if (ftruncate (s->fd, s->logical_offset)) + if (s->special_file || ftruncate (s->fd, s->logical_offset)) #else #ifdef HAVE_CHSIZE - if (chsize (s->fd, s->logical_offset)) + if (s->special_file || chsize (s->fd, s->logical_offset)) #endif #endif { @@ -915,6 +918,7 @@ fd_to_stream (int fd, int prot, int avoid_mmap) fstat (fd, &statbuf); s->file_length = S_ISREG (statbuf.st_mode) ? statbuf.st_size : -1; + s->special_file = !S_ISREG (statbuf.st_mode); #if HAVE_MMAP if (avoid_mmap) |