diff options
| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-06-04 23:14:46 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-06-04 23:14:46 +0200 |
| commit | 4cb90fceb779dbf33cfd9bcf28c66ffc737537f2 (patch) | |
| tree | 5892ac09e6e04b262d89b6d23cd77eee894db36d /trans/streamio.c | |
| parent | a8b8ece4ff36fca27492f0a4e925e2f4453ee483 (diff) | |
Do not make io_select return errors on unsupported READ/WRITE mode
The descriptor is valid, it is just the mode which is not available.
* console-client/kbd-repeat.c (repeater_select): Drop SELECT_URG flag from
`type'. Return 0 instead of EINVAL if `type' contains SELECT_WRITE.
* console-client/pc-mouse (repeater_select): Likewise.
* trans/mtab.c (trivfs_S_io_select): Return 0 instead of EBADF when the
openmodes do not match the requested modes in `type'.
* trans/new-fifo.c (io_select_common): Likewise.
* trans/fifo.c (io_select_common): Likewise.
* trans/null.c (trivfs_S_io_select): Likewise.
* trans/streamio.c (io_select_common): Likewise.
Diffstat (limited to 'trans/streamio.c')
| -rw-r--r-- | trans/streamio.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/trans/streamio.c b/trans/streamio.c index a80975f3..5539c8ea 100644 --- a/trans/streamio.c +++ b/trans/streamio.c @@ -560,9 +560,6 @@ io_select_common (struct trivfs_protid *cred, if (!cred) return EOPNOTSUPP; - if (!(cred->po->openmodes & O_WRITE) && (*type & SELECT_WRITE)) - return EBADF; - *type &= SELECT_READ | SELECT_WRITE; if (*type == 0) @@ -575,11 +572,10 @@ io_select_common (struct trivfs_protid *cred, pthread_mutex_lock (&global_lock); if ((*type & SELECT_READ) && buffer_readable (input_buffer)) available |= SELECT_READ; - if (output_buffer) - { - if ((*type & SELECT_WRITE) && buffer_writable (output_buffer)) - available |= SELECT_WRITE; - } + if ((*type & SELECT_WRITE) && + (!(cred->po->openmodes & O_WRITE) || + (buffer_writable && buffer_writable (output_buffer)))) + available |= SELECT_WRITE; if (available) { |