linux daemon() Ó÷¨
Ãû³Æ
daemon-ÔËÐÐÓÚºǫ́
¸ÅÒª
#include <unistd.h>
int daemon(int nochdir, int noclose);
ÃèÊö
daemon()º¯Êý£¬Ö÷ÒªÓÃÓÚijЩ³ÌÐòÏ£Íû×Ô¼ºÍÑÀëÖն˵ĿØÖƶøÔËÐÐÓÚºǫ́µÄÇé¿ö¡£
³ý·ÇnochdirΪ·ÇÁãÖµ£¬Èç¹ûnochdirΪ0£¬ÄÇôdaemon»á´Óµ±Ç°Ä¿Â¼£¬¸ü¸Äµ½¸ùĿ¼£¨“/”£©ÏÂÔËÐС£
³ý·ÇnocloseΪ·ÇÁãÖµ£¬Èç¹ûnocloseΪ0£¬ÄÇôdaemon»á½«±ê×¼ÊäÈ룬±ê×¼Êä³ö£¬±ê×¼´íÎóÊä³öÖØ¶¨Ïòµ½/dev/null¡£
·µ»ØÖµ
³É¹¦·µ»Ø0£¬Ê§°Ü·µ»Ø-1¡£
NAME
daemon - run in the background
SYNOPSIS
#include <unistd.h>
int daemon(int nochdir, int noclose);
DESCRIPTION
The daemon() function is for programs wishing to detach themselves
from the controlling terminal and run in the background as system
daemons.
Unless the argument nochdir is non-zero, daemon() changes the current
working directory to the root ("/").
Unless the argument noclose is non-zero, daemon() will redirect stan-
dard input, standard output and standard error to /dev/null.
RETURN VALUE
(This function forks, and if the fork() succeeds, the parent does
_exit(0), so that further errors are seen by the child only.) On
success zero will be returned. If an error occurs, daemon() returns
&nb
Ïà¹ØÎĵµ£º
1. HCI²ãÐÒé¸ÅÊö£º
HCIÌṩһÌ×ͳһµÄ·½·¨À´·ÃÎÊBluetoothµ×²ã¡£ÈçͼËùʾ£º
´ÓͼÉÏ¿ÉÒÔ¿´³ö£¬Host Controller Interface(HCI) ¾ÍÊÇÓÃÀ´¹µÍ¨HostºÍModule¡£Hostͨ³£¾ÍÊÇPC£¬ ModuleÔòÊÇÒÔ¸÷ÖÖÎïÀíÁ¬½ÓÐÎʽ£¨USB,serial,pc-cardµÈ£©Á¬½Óµ½PCÉϵÄbluetooth Dongle¡£
ÔÚHostÕâÒ»¶Ë£ºapplication,SDP,L2capµÈÐÒé ......
LINUXÏ mysql¿Í»§¶Ë²»ÄÜÊäÈëÖÐÎÄ
½ñÌìÓöµ½ÁËÕâ¸öÎÊÌ⣬ÔÚLINUXÏÂÊäÈëÖÐÎÄ£¬Ã»ÓÐÎÊÌ⣬µ«ÔÚMYSQL¿Í»§¶ËÉÏÎÞ·¨ÊäÈëÖÐÎÄ£¬ºÜÆæ¹Ö£¿
ÕÒÁ˺ܶà×ÊÁÏÖÕÓÚ½â¾öÁËÕâ¸öÎÊÌ⣬ÆäʵÕâ¸öºÍ×Ö·û¼¯Î޹ء£Í¨³£³öÏÖÔÚ×Ô¼º±àÒëµÄmysql°æ±¾ÉÏ£¬Èç¹ûÊÇREDHATµÄ»°£¬ÇëʹÓÃϵͳ×Ô´øMYSQL¿Í»§¶Ë¡£ÏµÍ³Ä¬ÈÏrpm°²×°µÄmysqlÔòûÓÐÕâ¸öÎÊÌâ³öÏÖ¡£
Á ......
#ifdef XP_UNIX
/*
* Set up the plugin function table that Netscape will use to
* call us. Netscape needs to know about our version and size
* and have a UniversalProcPointer for every function we
* implement.
*/
pluginFuncs->version = (NP_VERSION_MAJOR << 8) + NP_VERSION_MINOR;
......
linuxÄÚºËinit½ø³Ìº¯ÊýµÄ²¿·Ö´úÂëÈçÏ£º 01 if (execute_command)
02 run_init_process(execute_command);
03
04 run_init_process("/sbin/init");
05 run_init_process("/etc/init");
06 run_init_process("/bin/init");
07 run_init_process("/ ......