redis作为一个服务器,它的启动是从main函数开始的。redis.c
1. 进程重命名
定义在config.h
(defined __NetBSD__ || defined __FreeBSD__ || defined __OpenBSD__) //bsd(unix的变种)宏定义
USE_SETPROCTITLE
<span style="color: #0000ff;">#define USE_SETPROCTITLE
<span style="color: #0000ff;">#define INIT_SETPROCTITLE_REPLACEMENT
<span style="color: #0000ff;">void spt_init(<span style="color: #0000ff;">int argc,<span style="color: #0000ff;">char <span style="color: #000000;">argv[]);
<span style="color: #0000ff;">void setproctitle(<span style="color: #0000ff;">const <span style="color: #0000ff;">char <span style="color: #000000;">fmt,...);
<span style="color: #0000ff;">#endif
<span style="color: #0000ff;">#if
(defined linux || defined APPLE__) //linux和苹果的宏定义<span style="color: #0000ff;">#define USE_SETPROCTITLE
<span style="color: #0000ff;">#define INIT_SETPROCTITLE_REPLACEMENT
<span style="color: #0000ff;">void spt_init(<span style="color: #0000ff;">int argc,<span style="color: #0000ff;">char <span style="color: #000000;">argv[]);
<span style="color: #0000ff;">void setproctitle(<span style="color: #0000ff;">const <span style="color: #0000ff;">char <span style="color: #000000;">fmt,...);
<span style="color: #0000ff;">#endif
http://www.baike.com/wiki/BSD
BSD的开源後裔 不同的BSD操作系统针对不同的用途及用户,可应用于多种硬件构架。在政府机构中常能看到BSD的身影。虽然下面的BSD功能可能并非独有,但每种BSD在各自的领域,都逐渐具有了良好声誉,有的专注于性能,有的则以安全见长。是最年轻的BSD,专门提供比FreeBSD更优秀的系统,并使内核直接支持SSI集群,以取得更好的计算效果。这个项目在此方向上,才开始数年,主要关注i386平台。 FreeBSD在BSD家族中以易用性与高性能而着称,由于主要用作微处理器架构,如i386、AMD's 64-bit i386扩展,所以FreeBSD非常关注多处理器。FreeBSD在i386和amd64服务器上,运行地非常好,当然,它也可以在其他硬件构架上运行。 NetBSD拥有特别出色的可移植性,能在多达54种平台上运行,小到嵌入式的掌上设备,大到服务器群,NetBSD甚至还在国际空间站中服务。OpenBSD在密码学和安全方面特别出众,可移植性也很好,当然略逊于NetBSD。安全功能如OpenSSH,是由OpenBSD率先开创的。OpenBSD作为安全请求机器(security demanding machines)运行,受到好评。必须注意的是,上面所罗列的,更多地是基于感性认识,并针对其开发焦点,并没有严格地比较规则。实际而言,每种具体的BSD都可担当许多角色任务。
2. 设置locale
setlocale(LC_COLLATE,);
http://manpages.ubuntu.com/manpages/lucid/en/man3/setlocale.3.html
NAME
setlocale - set the current locale
SYNOPSIS
#include<strong>char</strong> <strong>*setlocale(int</strong> <span style="text-decoration: underline;">category</span><strong>,</strong> <strong>const</strong> <strong>char</strong> <strong>*</strong><span style="text-decoration: underline;">locale</span><strong>);</strong>
DESCRIPTION
The setlocale() function is used to set or query the program’s current locale.If <span style="text-decoration: underline;">locale</span> is not NULL,the program’s current locale is modified according to the arguments. The argument <span style="text-decoration: underline;">category</span> determines which parts of the program’s current locale should be modified. <strong>LC_ALL</strong> for all of the locale. <strong>LC_COLLATE</strong> for regular expression matching (it determines the meaning of range expressions and equivalence classes) and string collation. <strong>LC_CTYPE</strong> for regular expression matching,character classification,conversion,case-sensitive comparison,and wide character functions. <strong>LC_MESSAGES</strong> for localizable natural-language messages. <strong>LC_MONETARY</strong> for monetary formatting. <strong>LC_NUMERIC</strong> for number formatting (such as the decimal point and the thousands separator). <strong>LC_TIME</strong> for time and date formatting. The argument <span style="text-decoration: underline;">locale</span> is a pointer to a character string containing the required setting of <span style="text-decoration: underline;">category</span>. Such a string is either a well-known constant like "C" or "da_DK" (see below),or an opaque string that was returned by another call of <strong>setlocale</strong>(). If <span style="text-decoration: underline;">locale</span> is <strong>""</strong>,each part of the locale that should be modified is set according to the environment variables. The details are implementation-dependent. For glibc,first (regardless of <span style="text-decoration: underline;">category</span>),the environment variable <strong>LC_ALL</strong> is inspected,next the environment variable with the same name as the category (<strong>LC_COLLATE</strong>,<strong>LC_CTYPE</strong>,<strong>LC_MESSAGES</strong>,<strong>LC_MONETARY</strong>,<strong>LC_NUMERIC</strong>,<strong>LC_TIME</strong>) and finally the environment variable <strong>LANG</strong>. The first existing environment variable is used. If its value is not a valid locale specification,the locale is unchanged,and <strong>setlocale</strong>() returns NULL. The locale <strong>"C"</strong> or <strong>"POSIX"</strong> is a portable locale; its <strong>LC_CTYPE</strong> part corresponds to the 7-bit ASCII character set. A locale name is typically of the form <span style="text-decoration: underline;">language</span>[_<span style="text-decoration: underline;">territory</span>][.<span style="text-decoration: underline;">codeset</span>][@<span style="text-decoration: underline;">modifier</span>],where <span style="text-decoration: underline;">language</span> is an ISO 639 language code,<span style="text-decoration: underline;">territory</span> is an ISO 3166 country code,and <span style="text-decoration: underline;">codeset</span> is a character set or encoding identifier like <strong>ISO-8859-1</strong> or <strong>UTF-8</strong>. For a list of all supported locales,try "locale -a",cf. <strong><a href="http://manpages.ubuntu.com/manpages/lucid/en/man1/locale.1.html">locale</a></strong>(1). If <span style="text-decoration: underline;">locale</span> is NULL,the current locale is only queried,not modified. On startup of the main program,the portable <strong>"C"</strong> locale is selected as default. A program may be made portable to all locales by calling: setlocale(LC_ALL,""); after program initialization,by using the values returned from a <strong><a href="http://manpages.ubuntu.com/manpages/lucid/en/man3/localeconv.3.html">localeconv</a></strong>(3) call for locale-dependent information,by using the multi-byte and wide character functions for text processing if <strong>MB_CUR_MAX</strong> <strong>></strong> <strong>1</strong>,and by using <strong><a href="http://manpages.ubuntu.com/manpages/lucid/en/man3/strcoll.3.html">strcoll</a></strong>(3),<strong><a href="http://manpages.ubuntu.com/manpages/lucid/en/man3/wcscoll.3.html">wcscoll</a></strong>(3) or <strong><a href="http://manpages.ubuntu.com/manpages/lucid/en/man3/strxfrm.3.html">strxfrm</a></strong>(3),<strong><a href="http://manpages.ubuntu.com/manpages/lucid/en/man3/wcsxfrm.3.html">wcsxfrm</a></strong>(3) to compare strings.
RETURN VALUE
A successful call to setlocale() returns an opaque string that corresponds to the locale set. This string may be allocated in static storage. The string returned is such that a subsequent call with that string and its associated category will restore that part of the process’s locale. The return value is NULL if the request cannot be honored.
CONFORMING TO
C89,C99,POSIX.1-2001.
NOTES
Linux (that is,glibc) supports the portable locales "C" and "POSIX".
In the good old days there used to be support for the European Latin-1
"ISO-8859-1" locale (e.g.,in libc-4.5.21 and libc-4.6.27),and the
Russian "KOI-8" (more precisely,"koi-8r") locale (e.g.,in
libc-4.6.27),so that having an environment variable
sufficed to make (3) return the right
answer. These days non-English speaking Europeans have to work a bit
harder,and must install actual locale files.
SEE ALSO
(1),(1),(3),(3),(3),(3),(3),(3),(7),(7)
COLOPHON
This page is part of release 3.23 of the Linux project. A
description of the project,and information about reporting bugs,can
be found at .