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add field for kvm descriptor.

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* glibtop_machine.h: add field for kvm descriptor.

        * open.c: add code for opening kernel name space.

        * shm_limits.c: implemented.

The real implementation will have this code in the daemon, since process
needs to be setgid sys to be able to read kernel symbols.
This commit is contained in:
Drazen Kacar
1999-04-29 20:42:17 +00:00
parent a567adcce5
commit 2868191440
4 changed files with 42 additions and 2 deletions
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29
sysdeps/solaris/shm_limits.c
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@@ -24,14 +24,25 @@
#include <glibtop.h>
#include <glibtop/shm_limits.h>
static const unsigned long _glibtop_sysdeps_shm_limits = 0;
#include <kvm.h>
#include <sys/shm.h>
static struct nlist nlst[] = { {"shminfo"}, {NULL} };
static const unsigned long _glibtop_sysdeps_shm_limits =
(1L << GLIBTOP_IPC_SHMMAX) + (1L << GLIBTOP_IPC_SHMMIN) +
(1L << GLIBTOP_IPC_SHMMNI) + (1L << GLIBTOP_IPC_SHMSEG);
/* Init function. */
void
glibtop_init_shm_limits_s (glibtop *server)
{
server->sysdeps.shm_limits = _glibtop_sysdeps_shm_limits;
kvm_t *kd = server->machine.kd;
if(kd && !kvm_nlist(kd, nlst))
server->sysdeps.shm_limits = _glibtop_sysdeps_shm_limits;
else
server->sysdeps.shm_limits = 0;
}
/* Provides information about sysv ipc limits. */
@@ -39,5 +50,19 @@ glibtop_init_shm_limits_s (glibtop *server)
void
glibtop_get_shm_limits_s (glibtop *server, glibtop_shm_limits *buf)
{
kvm_t *kd = server->machine.kd;
struct shminfo sinfo;
memset (buf, 0, sizeof (glibtop_shm_limits));
if(!(server->sysdeps.shm_limits))
return;
if(kvm_read(kd, nlst[0].n_value, (void *)&sinfo,
sizeof(struct shminfo)) != sizeof(struct shminfo))
return;
buf->shmmax = sinfo.shmmax;
buf->shmmin = sinfo.shmmin;
buf->shmmni = sinfo.shmmni;
buf->shmseg = sinfo.shmseg;
buf->flags = _glibtop_sysdeps_shm_limits;
}