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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/sunrpc/openchild.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.bz2 glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/sunrpc/openchild.c')
-rw-r--r-- | REORG.TODO/sunrpc/openchild.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/REORG.TODO/sunrpc/openchild.c b/REORG.TODO/sunrpc/openchild.c new file mode 100644 index 0000000000..29f274a8ad --- /dev/null +++ b/REORG.TODO/sunrpc/openchild.c @@ -0,0 +1,107 @@ +/* + * Copyright (c) 2010, Oracle America, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * * Neither the name of the "Oracle America, Inc." nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Open two pipes to a child process, one for reading, one for writing. + * The pipes are accessed by FILE pointers. This is NOT a public + * interface, but for internal use only! + */ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <rpc/rpc.h> +#include <rpc/clnt.h> + +#include <libio/iolibio.h> +#define fflush(s) _IO_fflush (s) +#define __fdopen(fd,m) _IO_fdopen (fd,m) + +/* + * returns pid, or -1 for failure + */ +int +_openchild (const char *command, FILE ** fto, FILE ** ffrom) +{ + int i; + int pid; + int pdto[2]; + int pdfrom[2]; + + if (__pipe (pdto) < 0) + goto error1; + if (__pipe (pdfrom) < 0) + goto error2; + switch (pid = __fork ()) + { + case -1: + goto error3; + + case 0: + /* + * child: read from pdto[0], write into pdfrom[1] + */ + __close (0); + __dup (pdto[0]); + __close (1); + __dup (pdfrom[1]); + fflush (stderr); + for (i = _rpc_dtablesize () - 1; i >= 3; i--) + __close (i); + fflush (stderr); + execlp (command, command, NULL); + perror ("exec"); + _exit (~0); + + default: + /* + * parent: write into pdto[1], read from pdfrom[0] + */ + *fto = __fdopen (pdto[1], "w"); + __close (pdto[0]); + *ffrom = __fdopen (pdfrom[0], "r"); + __close (pdfrom[1]); + break; + } + return pid; + + /* + * error cleanup and return + */ +error3: + __close (pdfrom[0]); + __close (pdfrom[1]); +error2: + __close (pdto[0]); + __close (pdto[1]); +error1: + return -1; +} |