diff options
Diffstat (limited to 'file_io/unix/pipe.c')
| -rw-r--r-- | file_io/unix/pipe.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/file_io/unix/pipe.c b/file_io/unix/pipe.c new file mode 100644 index 0000000..7be16e5 --- /dev/null +++ b/file_io/unix/pipe.c @@ -0,0 +1,292 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "apr_arch_file_io.h" +#include "apr_strings.h" +#include "apr_portable.h" + +#include "apr_arch_inherit.h" + +/* Figure out how to get pipe block/nonblock on BeOS... + * Basically, BONE7 changed things again so that ioctl didn't work, + * but now fcntl does, hence we need to do this extra checking. + * The joys of beta programs. :-) + */ +#if defined(BEOS) +#if !defined(BONE7) +# define BEOS_BLOCKING 1 +#else +# define BEOS_BLOCKING 0 +#endif +#endif + +static apr_status_t pipeblock(apr_file_t *thepipe) +{ +#if !defined(BEOS) || !BEOS_BLOCKING + int fd_flags; + + fd_flags = fcntl(thepipe->filedes, F_GETFL, 0); +# if defined(O_NONBLOCK) + fd_flags &= ~O_NONBLOCK; +# elif defined(O_NDELAY) + fd_flags &= ~O_NDELAY; +# elif defined(O_FNDELAY) + fd_flags &= ~O_FNDELAY; +# else + /* XXXX: this breaks things, but an alternative isn't obvious...*/ + return APR_ENOTIMPL; +# endif + if (fcntl(thepipe->filedes, F_SETFL, fd_flags) == -1) { + return errno; + } +#else /* BEOS_BLOCKING */ + +# if BEOS_BONE /* This only works on BONE 0-6 */ + int on = 0; + if (ioctl(thepipe->filedes, FIONBIO, &on, sizeof(on)) < 0) { + return errno; + } +# else /* "classic" BeOS doesn't support this at all */ + return APR_ENOTIMPL; +# endif + +#endif /* !BEOS_BLOCKING */ + + thepipe->blocking = BLK_ON; + return APR_SUCCESS; +} + +static apr_status_t pipenonblock(apr_file_t *thepipe) +{ +#if !defined(BEOS) || !BEOS_BLOCKING + int fd_flags = fcntl(thepipe->filedes, F_GETFL, 0); + +# if defined(O_NONBLOCK) + fd_flags |= O_NONBLOCK; +# elif defined(O_NDELAY) + fd_flags |= O_NDELAY; +# elif defined(O_FNDELAY) + fd_flags |= O_FNDELAY; +# else + /* XXXX: this breaks things, but an alternative isn't obvious...*/ + return APR_ENOTIMPL; +# endif + if (fcntl(thepipe->filedes, F_SETFL, fd_flags) == -1) { + return errno; + } + +#else /* BEOS_BLOCKING */ + +# if BEOS_BONE /* This only works on BONE 0-6 */ + int on = 1; + if (ioctl(thepipe->filedes, FIONBIO, &on, sizeof(on)) < 0) { + return errno; + } +# else /* "classic" BeOS doesn't support this at all */ + return APR_ENOTIMPL; +# endif + +#endif /* !BEOS_BLOCKING */ + + thepipe->blocking = BLK_OFF; + return APR_SUCCESS; +} + +APR_DECLARE(apr_status_t) apr_file_pipe_timeout_set(apr_file_t *thepipe, apr_interval_time_t timeout) +{ + if (thepipe->is_pipe == 1) { + thepipe->timeout = timeout; + if (timeout >= 0) { + if (thepipe->blocking != BLK_OFF) { /* blocking or unknown state */ + return pipenonblock(thepipe); + } + } + else { + if (thepipe->blocking != BLK_ON) { /* non-blocking or unknown state */ + return pipeblock(thepipe); + } + } + return APR_SUCCESS; + } + return APR_EINVAL; +} + +APR_DECLARE(apr_status_t) apr_file_pipe_timeout_get(apr_file_t *thepipe, apr_interval_time_t *timeout) +{ + if (thepipe->is_pipe == 1) { + *timeout = thepipe->timeout; + return APR_SUCCESS; + } + return APR_EINVAL; +} + +APR_DECLARE(apr_status_t) apr_os_pipe_put_ex(apr_file_t **file, + apr_os_file_t *thefile, + int register_cleanup, + apr_pool_t *pool) +{ + int *dafile = thefile; + + (*file) = apr_pcalloc(pool, sizeof(apr_file_t)); + (*file)->pool = pool; + (*file)->eof_hit = 0; + (*file)->is_pipe = 1; + (*file)->blocking = BLK_UNKNOWN; /* app needs to make a timeout call */ + (*file)->timeout = -1; + (*file)->ungetchar = -1; /* no char avail */ + (*file)->filedes = *dafile; + if (!register_cleanup) { + (*file)->flags = APR_FOPEN_NOCLEANUP; + } + (*file)->buffered = 0; +#if APR_HAS_THREADS + (*file)->thlock = NULL; +#endif + if (register_cleanup) { + apr_pool_cleanup_register((*file)->pool, (void *)(*file), + apr_unix_file_cleanup, + apr_pool_cleanup_null); + } +#ifndef WAITIO_USES_POLL + /* Start out with no pollset. apr_wait_for_io_or_timeout() will + * initialize the pollset if needed. + */ + (*file)->pollset = NULL; +#endif + return APR_SUCCESS; +} + +APR_DECLARE(apr_status_t) apr_os_pipe_put(apr_file_t **file, + apr_os_file_t *thefile, + apr_pool_t *pool) +{ + return apr_os_pipe_put_ex(file, thefile, 0, pool); +} + +static apr_status_t file_pipe_create(apr_file_t **in, apr_file_t **out, + apr_pool_t *pool_in, apr_pool_t *pool_out) +{ + int filedes[2]; + + if (pipe(filedes) == -1) { + return errno; + } + + (*in) = (apr_file_t *)apr_pcalloc(pool_in, sizeof(apr_file_t)); + (*in)->pool = pool_in; + (*in)->filedes = filedes[0]; + (*in)->is_pipe = 1; + (*in)->fname = NULL; + (*in)->buffered = 0; + (*in)->blocking = BLK_ON; + (*in)->timeout = -1; + (*in)->ungetchar = -1; + (*in)->flags = APR_INHERIT; +#if APR_HAS_THREADS + (*in)->thlock = NULL; +#endif +#ifndef WAITIO_USES_POLL + (*in)->pollset = NULL; +#endif + (*out) = (apr_file_t *)apr_pcalloc(pool_out, sizeof(apr_file_t)); + (*out)->pool = pool_out; + (*out)->filedes = filedes[1]; + (*out)->is_pipe = 1; + (*out)->fname = NULL; + (*out)->buffered = 0; + (*out)->blocking = BLK_ON; + (*out)->flags = APR_INHERIT; + (*out)->timeout = -1; +#if APR_HAS_THREADS + (*out)->thlock = NULL; +#endif +#ifndef WAITIO_USES_POLL + (*out)->pollset = NULL; +#endif + apr_pool_cleanup_register((*in)->pool, (void *)(*in), apr_unix_file_cleanup, + apr_pool_cleanup_null); + apr_pool_cleanup_register((*out)->pool, (void *)(*out), apr_unix_file_cleanup, + apr_pool_cleanup_null); + return APR_SUCCESS; +} + +static void file_pipe_block(apr_file_t **in, apr_file_t **out, apr_int32_t blocking) +{ + switch (blocking) { + case APR_FULL_BLOCK: + break; + case APR_READ_BLOCK: + apr_file_pipe_timeout_set(*out, 0); + break; + case APR_WRITE_BLOCK: + apr_file_pipe_timeout_set(*in, 0); + break; + default: + apr_file_pipe_timeout_set(*out, 0); + apr_file_pipe_timeout_set(*in, 0); + break; + } +} + +APR_DECLARE(apr_status_t) apr_file_pipe_create(apr_file_t **in, + apr_file_t **out, apr_pool_t *pool) +{ + return file_pipe_create(in, out, pool, pool); +} + +APR_DECLARE(apr_status_t) apr_file_pipe_create_ex(apr_file_t **in, + apr_file_t **out, + apr_int32_t blocking, + apr_pool_t *pool) +{ + apr_status_t status; + + if ((status = file_pipe_create(in, out, pool, pool)) != APR_SUCCESS) { + return status; + } + + file_pipe_block(in, out, blocking); + + return APR_SUCCESS; +} + +APR_DECLARE(apr_status_t) apr_file_pipe_create_pools(apr_file_t **in, + apr_file_t **out, apr_int32_t blocking, apr_pool_t *pool_in, apr_pool_t *pool_out) +{ + apr_status_t status; + + if ((status = file_pipe_create(in, out, pool_in, pool_out)) != APR_SUCCESS) { + return status; + } + + file_pipe_block(in, out, blocking); + + return APR_SUCCESS; +} + +APR_DECLARE(apr_status_t) apr_file_namedpipe_create(const char *filename, + apr_fileperms_t perm, apr_pool_t *pool) +{ + mode_t mode = apr_unix_perms2mode(perm); + + if (mkfifo(filename, mode) == -1) { + return errno; + } + return APR_SUCCESS; +} + + + |