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.\" -*- nroff -*-
.\"
.\" (C)opyright 1993 by Dan Miner (dminer@nyx.cs.du.edu)
.\"
.\" Permission is granted to freely distribute or modify this file
.\" for the purpose of improving Linux or its documentation efforts.
.\" If you modify this file, please put a date stamp and HOW you
.\" changed this file. Thanks. -DM
.\"
.\" Modified Sat Jul 24 12:35:12 1993 by Rik Faith <faith@cs.unc.edu>
.\" Modified Tue Oct 22 22:29:51 1996 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified Mon Aug 25 16:06:11 1997 by Nicols Lichtmaier <nick@debian.org>
.\"
.TH SYSINFO 2 "25/08/1997" "Linux 2.0" "Manual do Programador Linux"
.SH NOME
sysinfo \- devolve informaes sobre todas as estatistcas do sistema
.SH SINOPSE
.B #include <sys/sysinfo.h>
.sp
.BI "int sysinfo(struct sysinfo *" info );
.SH DESCRIO
At o Linux 2.3.16,
.B sysinfo
era usado para devolver informaes na seguinte estrutura:
.RS
.nf
struct sysinfo {
long uptime; /* Seconds since boot */
unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
unsigned long totalram; /* Total usable main memory size */
unsigned long freeram; /* Available memory size */
unsigned long sharedram; /* Amount of shared memory */
unsigned long bufferram; /* Memory used by buffers */
unsigned long totalswap; /* Total swap space size */
unsigned long freeswap; /* swap space still available */
unsigned short procs; /* Number of current processes */
char _f[22]; /* Pads structure to 64 bytes */
};
.fi
.RE
e o tamanho era dado em bytes. Mas a partir do Linux 2.3.23 (i386), 2.3.48
(todas as arquiteturas) a estrutura
.RS
.nf
struct sysinfo {
long uptime; /* Seconds since boot */
unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
unsigned long totalram; /* Total usable main memory size */
unsigned long freeram; /* Available memory size */
unsigned long sharedram; /* Amount of shared memory */
unsigned long bufferram; /* Memory used by buffers */
unsigned long totalswap; /* Total swap space size */
unsigned long freeswap; /* swap space still available */
unsigned short procs; /* Number of current processes */
unsigned long totalhigh; /* Total high memory size */
unsigned long freehigh; /* Available high memory size */
unsigned int mem_unit; /* Memory unit size in bytes */
char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding for libc5 */
};
.fi
.RE
e os tamanhos so dados como mltiplo de \fImem_unit\fP bytes.
.B sysinfo
prov um meio simples de obteno de todas as estatsticas do sistema. Isto mais
portvel que ler \fI/dev/kmem\fP.
Para um exemplo de uso, veja intro(2).
.SH "VALORES RETORNADOS"
Em caso de sucesso, zero retornado. Caso contrrio, \-1 retornado, e
.I errno
selecionado adequadamente.
.SH ERROS
.TP
.B EFAULT
aponta para uma \fIstruct\ sysinfo\fP invlida
.SH "DE ACORDO COM"
Esta funo especfica do Linux, e no deveria ser usada em programas que
pretendem ser portveis.
.sp
O kernel do linux tem uma chamada de sistema sysinfo desde o 0.98.pl6.
A libc do linux contm uma rotina sysinfo() desde 5.3.5, e
a glibc a tem desde a verso 1.90.
.SH "VEJA TAMBM"
.BR proc (5)
.SH TRADUZIDO POR LDP-BR em 21/08/2000
\&\fR\&\f(CWAndr L. Fassone Canova <lonelywolf@blv.com.br> (traduo)\fR
\&\fR\&\f(CWxxxxxxxxxxxxxxxxxxxxxxxxx <xxx@xxxxxx.xxx.xx> (reviso)\fR
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