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85 lines
2.6 KiB
Diff
85 lines
2.6 KiB
Diff
From 9e991ba65c34da288d5e2cd317ee8a5263bec8a2 Mon Sep 17 00:00:00 2001
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From: Tias Guns <tias@ulyssis.org>
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Date: Sun, 5 Aug 2012 15:25:34 +0200
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Subject: [PATCH 10/33] android syscall (non-trivial): semctl
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needed by ipcs and ipcrm, also needed (but not sufficient) for syslogd and logread
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semctl from glibc
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patch from 'no-sys-shm,msg,sem' by Dan Drown
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http://dan.drown.org/android/src/busybox/
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Signed-off-by: Tias Guns <tias@ulyssis.org>
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---
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libbb/semctl.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 58 insertions(+)
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create mode 100644 libbb/semctl.c
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diff --git a/libbb/semctl.c b/libbb/semctl.c
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new file mode 100644
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index 000000000..2c600e4f0
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--- /dev/null
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+++ b/libbb/semctl.c
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@@ -0,0 +1,58 @@
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+/* Copyright (C) 1995,1997,1998,2000,2003,2004,2006
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+ Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+ Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, write to the Free
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+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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+ 02111-1307 USA. */
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+/* originally from glibc-2.14/sysdeps/unix/sysv/linux/semctl.c, modified */
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+
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+// syscall used by syslogd, ipcrm, ipcs
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+//kbuild:lib-y += semctl.o
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+
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+#include <sys/syscall.h> /* For __NR_xxx definitions */
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+#include <stdarg.h>
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+#include <sys/sem.h>
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+#include "libbb.h"
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+
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+/* code from GLIBC */
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+int semctl(int semid, int semnum, int cmd, ...) {
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+ union semun arg;
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+ va_list ap;
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+
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+ va_start (ap, cmd);
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+
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+ /* Get the argument only if required. */
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+ arg.buf = NULL;
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+ switch (cmd)
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+ {
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+ case SETVAL: /* arg.val */
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+ case GETALL: /* arg.array */
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+ case SETALL:
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+ case IPC_STAT: /* arg.buf */
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+ case IPC_SET:
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+ case SEM_STAT:
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+ case IPC_INFO: /* arg.__buf */
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+ case SEM_INFO:
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+ va_start (ap, cmd);
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+ arg = va_arg (ap, union semun);
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+ va_end (ap);
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+ break;
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+ }
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+
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+ va_end (ap);
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+
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+ return syscall(__NR_semctl, semid, semnum, cmd, arg);
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+}
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--
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2.30.0
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