Oct 11, 2018
系统编程
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进程通信
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对象
ipc
种类
消息队列
共享内存
信号量
消息队列
错误处理
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curedump机制, 产生core文件
命令
ulimit
目录
/proc/[pid]/
fork
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介绍
子线程
epoll
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介绍
多路复用io接口，提高大量并发连接中只有少量活跃情况下系统cpu利用率
signals
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介绍
unix系统中出错时显示的错误码（通常是拼在最后）
http://people.cs.pitt.edu/~alanjawi/cs449/code/shell/UnixSignals.htm
SIGHUP 1 Exit Hangup
SIGINT 2 Exit Interrupt
SIGQUIT 3 Core Quit
SIGILL 4 Core Illegal Instruction
SIGTRAP 5 Core Trace/Breakpoint Trap
SIGABRT 6 Core Abort
SIGEMT 7 Core Emulation Trap
SIGFPE 8 Core Arithmetic Exception
SIGKILL 9 Exit Killed
SIGBUS 10 Core Bus Error
SIGSEGV 11 Core Segmentation Fault
SIGSYS 12 Core Bad System Call
SIGPIPE 13 Exit Broken Pipe
SIGALRM 14 Exit Alarm Clock
SIGTERM 15 Exit Terminated
SIGUSR1 16 Exit User Signal 1
SIGUSR2 17 Exit User Signal 2
SIGCHLD 18 Ignore Child Status
SIGPWR 19 Ignore Power Fail/Restart
SIGWINCH 20 Ignore Window Size Change
SIGURG 21 Ignore Urgent Socket Condition
SIGPOLL 22 Ignore Socket I/O Possible
SIGSTOP 23 Stop Stopped (signal)
SIGTSTP 24 Stop Stopped (user)
SIGCONT 25 Ignore Continued
SIGTTIN 26 Stop Stopped (tty input)
SIGTTOU 27 Stop Stopped (tty output)
SIGVTALRM 28 Exit Virtual Timer Expired
SIGPROF 29 Exit Profiling Timer Expired
SIGXCPU 30 Core CPU time limit exceeded
SIGXFSZ 31 Core File size limit exceeded
SIGWAITING 32 Ignore All LWPs blocked
SIGLWP 33 Ignore Virtual Interprocessor Interrupt for Threads Library
SIGAIO 34 Ignore Asynchronous I/O
pf-kernel
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介绍
是linux kernel 的fork, pf代表post-factum, 是作者的nickname
libev
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libevent
介绍
是linux kernel 的fork, pf代表post-factum, 是作者的nickname