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.\"
.\" Copyright (c) 1993 Michael Haardt (michael@moria.de),
.\" Fri Apr 2 11:32:09 MET DST 1993
.\"
.\" This is free documentation; 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.
.\"
.\" The GNU General Public License's references to "object code"
.\" and "executables" are to be interpreted as the output of any
.\" document formatting or typesetting system, including
.\" intermediate and printed output.
.\"
.\" This manual 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 this manual; if not, write to the Free
.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
.\" USA.
.\"
.\" Tue Jul 6 12:42:46 MDT 1993 <dminer@nyx.cs.du.edu>
.\" Added "Calling Directly" and supporting paragraphs
.\"
.\" Modified Sat Jul 24 15:19:12 1993 by Rik Faith <faith@cs.unc.edu>
.\"
.\" Modified 21 Aug 1994 by Michael Chastain <mec@shell.portal.com>:
.\" Added explanation of arg stacking when 6 or more args.
.\"
.\" Modified 10 June 1995 by Andries Brouwer <aeb@cwi.nl>
.\"
.\" 2007-10-23 mtk: created as a new page, by taking the content
.\" specific to the _syscall() macros from intro(2).
.\"
.\" Japanese Version Copyright (c) 2008 Akihiro MOTOKI
.\" all rights reserved.
.\" Translated 2008-02-11, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.TH _SYSCALL 2 2007-12-19 "Linux" "Linux Programmer's Manual"
.SH ̾
_syscall \- 饤֥ΥݡȤʤǥƥॳư (Τˡ)
.SH
.B #include <linux/unistd.h>
A _syscall macro
desired system call
.SH
ƥॳ˴ؤƤΥץȥפΤ뤳ȤפǤ롣
θĿη֤ͤηΤɬפ롣
ºݤλѤˤäƤϡƥॳƥ˸ƤӽФ䤹뤿ˡ
7 ĤΥޥѰդƤ롣ΥޥϰʲηǤ롣
.sp
.RS
.RI _syscall X ( type , name , type1 , arg1 , type2 , arg2 ,...)
.RE
.PP
.IP
\fIX\fP 06 ǡƥॳ뤬θĿǤ롣
.IP
\fItype\fP ϥƥॳ֤ͤηǤ롣
.IP
\fIname\fP ϥƥॳ̾Ǥ롣
.IP
\fItypeN\fP N ܤΰηǤ롣
.IP
\fIargN\fP N ܤΰ̾Ǥ롣
.PP
Υޥϡꤷ \fIname\fP Ȥ̾δؿ롣
٥ե _syscall() 롼ɤƤȡ
Υƥॳ \fIname\fP Ȥ̾ǸƤ֤ȤǤ롣
.SH ե
.I /usr/include/linux/unistd.h
.SH
Υޥ Linux ͭǤꡢλѤ侩Ǥ롣
.SH
ͥ 2.6.18 ꤫顢_syscall ޥϥ桼֤Ф
إåե뤫줿
.BR syscall (2)
Ѥ뤳ȡ
(ĤΥƥ㡢ä ia64Ǥϡޤ _syscall ޥ
줿ȤϤʤΤ褦ʥƥǤϡ
.BR syscall (2)
ɬפǤä)
_syscall() ޥϥץȥפʤס
桼ϥץȥפʬǽʤФʤʤ⤷ʤ
Ȥ櫓 C++ 桼ξϤǤ
ƥॳϡΥ顼ɤΤߡޤΥ顼ɤΤߤ֤褦
ƤǤϤʤΥƥॳ뤬ɤΤ褦ʥ顼ɤ֤
ǧˤϡΥɤɤɬפ롣ƤξϡɸΥ顼
ɤˤΤǤ (㤨 \-\fBEPERM\fP)
_syscall() ޥϡΥƥॳ֤ \fIr\fP Ǥʤ硢
Τޤ֤\fIr\fP ξˤϡѿ
.I errno
\-\fIr\fP ꤷ\-1 ֤
顼ɤˤĤƤ
.BR errno (3)
ȡ
ƥॳݡηϤ (by-value)
(¤ΤΤ褦˽Ūʥǡξ) ݥϤ (by-pointer)
ǤʤФʤʤ
.\" The preferred way to invoke system calls that glibc does not know
.\" about yet is via
.\" .BR syscall (2).
.\" However, this mechanism can only be used if using a libc
.\" (such as glibc) that supports
.\" .BR syscall (2),
.\" and if the
.\" .I <sys/syscall.h>
.\" header file contains the required SYS_foo definition.
.\" Otherwise, the use of a _syscall macro is required.
.\"
.SH
.nf
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <linux/unistd.h> /* for _syscallX macros/related stuff */
#include <linux/kernel.h> /* for struct sysinfo */
_syscall1(int, sysinfo, struct sysinfo *, info);
/* Note: nroff Υե뤫ľܥԡݤˤϡ
printf ʸ;ʬʥХåå˺줺˺褦ˡ */
int
main(void)
{
struct sysinfo s_info;
int error;
error = sysinfo(&s_info);
printf("code error = %d\\n", error);
printf("Uptime = %lds\\nLoad: 1 min %lu / 5 min %lu / 15 min %lu\\n"
"RAM: total %lu / free %lu / shared %lu\\n"
"Memory in buffers = %lu\\nSwap: total %lu / free %lu\\n"
"Number of processes = %d\\n",
s_info.uptime, s_info.loads[0],
s_info.loads[1], s_info.loads[2],
s_info.totalram, s_info.freeram,
s_info.sharedram, s_info.bufferram,
s_info.totalswap, s_info.freeswap,
s_info.procs);
exit(EXIT_SUCCESS);
}
.fi
.SS "Sample Output"
.nf
code error = 0
uptime = 502034s
Load: 1 min 13376 / 5 min 5504 / 15 min 1152
RAM: total 15343616 / free 827392 / shared 8237056
Memory in buffers = 5066752
Swap: total 27881472 / free 24698880
Number of processes = 40
.fi
.SH Ϣ
.BR intro (2),
.BR syscall (2),
.BR errno (3)
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