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jehanne/sys/src/lib/c/9sys/pipe.c

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kernel: introduce devself Devself provides to each process access to its own structures. So far it contains four files: - pid - ppid - pipes used to implement pipe(2) - segments used to implement segattach, segdetach and segfree
2016-12-11 01:19:51 +01:00
/*
* This file is part of Jehanne.
*
* Copyright (C) 2015-2017 Giacomo Tesio <giacomo@tesio.it>
*
* Jehanne is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* Jehanne is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
*/
#include <u.h>
#include <libc.h>
int
libc: introduce "jehanne_" namespace With this commit all functions declared in libc.h have been renamed with the "jehanne_" prefix. This is done for several reason: - it removes conflicts during symbol resolution when linking standard C libraries like newlib or musl - it allows programs depending on a standard C library to directly link to a library depending on our non standard libc (eg libsec). To ease transiction two files are provided: - sys/include/lib9.h that can be included instead of <libc.h> to use the old names (via a simple set of macros) - sys/src/lib/c/lib9.c that can be compiled with a program where the macro provided by lib9.h are too dumb (see for example rc or grep). In the kernel port/lib.h has been modified accordingly and some of the functions it directly provides has been renamed too (eg malloc in qmalloc.c and print in devcons.c).
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jehanne_pipe(int pipes[2])
kernel: introduce devself Devself provides to each process access to its own structures. So far it contains four files: - pid - ppid - pipes used to implement pipe(2) - segments used to implement segattach, segdetach and segfree
2016-12-11 01:19:51 +01:00
{
kernel: move sysdup to libc
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FdPair pset;
purge syscall macros
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pset.aslong = sys_remove("#0/pipes");
kernel: move sysdup to libc
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if(pset.aslong == -1)
kernel: introduce devself Devself provides to each process access to its own structures. So far it contains four files: - pid - ppid - pipes used to implement pipe(2) - segments used to implement segattach, segdetach and segfree
2016-12-11 01:19:51 +01:00
return -1;
pipes[0] = pset.fd[0];
pipes[1] = pset.fd[1];
return 0;
}