diff options
Diffstat (limited to 'mailbox/file_stream.c')
| -rw-r--r-- | mailbox/file_stream.c | 43 |
1 files changed, 39 insertions, 4 deletions
diff --git a/mailbox/file_stream.c b/mailbox/file_stream.c index 13a582a4e..f474a9df5 100644 --- a/mailbox/file_stream.c +++ b/mailbox/file_stream.c @@ -55,6 +55,13 @@ _file_read (stream_t stream, char *optr, size_t osize, size_t n; int err = 0; + if (!fs->file) + { + if (nbytes) + *nbytes = 0; + return 0; + } + if (fs->offset != offset) { if (fseek (fs->file, offset, SEEK_SET) != 0) @@ -84,6 +91,13 @@ _file_readline (stream_t stream, char *optr, size_t osize, size_t n = 0; int err = 0; + if (!fs->file) + { + if (nbytes) + *nbytes = 0; + return 0; + } + if (fs->offset != offset) { if (fseek (fs->file, offset, SEEK_SET) != 0) @@ -117,6 +131,13 @@ _file_write (stream_t stream, const char *iptr, size_t isize, size_t n; int err = 0; + if (!fs->file) + { + if (nbytes) + *nbytes = 0; + return 0; + } + if (fs->offset != offset) { if (fseek (fs->file, offset, SEEK_SET) != 0) @@ -144,7 +165,7 @@ static int _file_truncate (stream_t stream, off_t len) { struct _file_stream *fs = stream_get_owner (stream); - if (ftruncate (fileno(fs->file), len) != 0) + if (fs->file && ftruncate (fileno(fs->file), len) != 0) return errno; return 0; } @@ -154,6 +175,12 @@ _file_size (stream_t stream, off_t *psize) { struct _file_stream *fs = stream_get_owner (stream); struct stat stbuf; + if (!fs->file) + { + if (psize) + *psize = 0; + return 0; + } fflush (fs->file); if (fstat(fileno(fs->file), &stbuf) == -1) return errno; @@ -166,16 +193,24 @@ static int _file_flush (stream_t stream) { struct _file_stream *fs = stream_get_owner (stream); - return fflush (fs->file); + if (fs->file) + return fflush (fs->file); + return 0; } static int _file_get_fd (stream_t stream, int *pfd) { struct _file_stream *fs = stream_get_owner (stream); + int status = 0; if (pfd) - *pfd = fileno (fs->file); - return 0; + { + if (fs->file) + *pfd = fileno (fs->file); + else + status = EINVAL; + } + return status; } static int |