diff options
Diffstat (limited to 'sysdeps/freebsd/sem_limits.c')
| -rw-r--r-- | sysdeps/freebsd/sem_limits.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/sysdeps/freebsd/sem_limits.c b/sysdeps/freebsd/sem_limits.c new file mode 100644 index 00000000..c9a177de --- /dev/null +++ b/sysdeps/freebsd/sem_limits.c @@ -0,0 +1,120 @@ +/* $Id$ */ + +/* Copyright (C) 1998-99 Martin Baulig + This file is part of LibGTop 1.0. + + Contributed by Martin Baulig <martin@home-of-linux.org>, August 1998. + + LibGTop 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; either version 2 of the License, + or (at your option) any later version. + + LibGTop 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 LibGTop; see the file COPYING. If not, write to the + Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. +*/ + +#include <glibtop.h> +#include <glibtop/error.h> +#include <glibtop/sem_limits.h> + +#include <glibtop_suid.h> + +#if defined(__bsdi__) && (_BSDI_VERSION < 199700) +/* Older versions of BSDI don't seem to have this. */ + +void +glibtop_init_sem_limits_p (glibtop *server) +{ } + +void +glibtop_get_sem_limits_p (glibtop *server, glibtop_sem_limits *buf) +{ + glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_SEM_LIMITS), 0); + + memset (buf, 0, sizeof (glibtop_sem_limits)); +} + +#else + +/* #define KERNEL to get declaration of `struct seminfo'. */ + +#if (defined(__FreeBSD__) && (__FreeBSD_version < 410000)) || defined(__bsdi__) +#define KERNEL 1 +#else +#define _KERNEL 1 +#endif + +#include <sys/ipc.h> +#include <sys/sem.h> + +static unsigned long _glibtop_sysdeps_sem_limits = +(1L << GLIBTOP_IPC_SEMMAP) + (1L << GLIBTOP_IPC_SEMMNI) + +(1L << GLIBTOP_IPC_SEMMNS) + (1L << GLIBTOP_IPC_SEMMNU) + +(1L << GLIBTOP_IPC_SEMMSL) + (1L << GLIBTOP_IPC_SEMOPM) + +(1L << GLIBTOP_IPC_SEMUME) + (1L << GLIBTOP_IPC_SEMUSZ) + +(1L << GLIBTOP_IPC_SEMVMX) + (1L << GLIBTOP_IPC_SEMAEM); + +/* The values in this structure never change at runtime, so we only + * read it once during initialization. We have to use the name `_seminfo' + * since `seminfo' is already declared external in <sys/sem.h>. */ +static struct seminfo _seminfo; + +/* nlist structure for kernel access */ +static struct nlist nlst [] = { + { "_seminfo" }, + { 0 } +}; + +/* Init function. */ + +void +glibtop_init_sem_limits_p (glibtop *server) +{ + if (kvm_nlist (server->machine.kd, nlst) < 0) { + glibtop_warn_io_r (server, "kvm_nlist (sem_limits)"); + return; + } + + if (kvm_read (server->machine.kd, nlst [0].n_value, + &_seminfo, sizeof (_seminfo)) != sizeof (_seminfo)) { + glibtop_warn_io_r (server, "kvm_read (seminfo)"); + return; + } + + server->sysdeps.sem_limits = _glibtop_sysdeps_sem_limits; +} + +/* Provides information about sysv sem limits. */ + +void +glibtop_get_sem_limits_p (glibtop *server, glibtop_sem_limits *buf) +{ + glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_SEM_LIMITS), 0); + + memset (buf, 0, sizeof (glibtop_sem_limits)); + + if (server->sysdeps.sem_limits == 0) + return; + + buf->semmap = _seminfo.semmap; + buf->semmni = _seminfo.semmni; + buf->semmns = _seminfo.semmns; + buf->semmnu = _seminfo.semmnu; + buf->semmsl = _seminfo.semmsl; + buf->semopm = _seminfo.semopm; + buf->semvmx = _seminfo.semvmx; + buf->semaem = _seminfo.semaem; + + buf->flags = _glibtop_sysdeps_sem_limits; +} + +#endif /* either a newer BSDI or no BSDI at all. */ + |