C 开发札记
1 Executable programs or shell commands2 System calls (functions provided by the kernel)3 Library calls (functions within program libraries)4 Special files (usually found in /dev)5 File formats and conventions eg /etc/passwd6 Games7 Miscellaneous (including macro packages and conventions), e.g. man(7), groff(7)8 System administration commands (usually only for root)9 Kernel routines [Non standard]
? ? ?man 按章节顺序号查找，所以如果想查函数，直接用man 2 XX or man 3 XX。
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2 linux 支持的标准signal （man 7 signal）
Signal Value Action Comment ---------------------------------- SIGHUP 1 Term Hangup detected on controlling terminal or death of controlling process SIGINT 2 Term Interrupt from keyboard SIGQUIT 3 Core Quit from keyboard SIGILL 4 Core Illegal Instruction SIGABRT 6 Core Abort signal from abort(3) SIGFPE 8 Core Floating point exception SIGKILL 9 Term Kill signal SIGSEGV 11 Core Invalid memory reference SIGPIPE 13 Term Broken pipe: write to pipe with no readers SIGALRM 14 Term Timer signal from alarm(2) SIGTERM 15 Term Termination signal SIGUSR1 30,10,16 Term User-defined signal 1 SIGUSR2 31,12,17 Term User-defined signal 2 SIGCHLD 20,17,18 Ign Child stopped or terminated SIGCONT 19,18,25 Cont Continue if stopped SIGSTOP 17,19,23 Stop Stop process SIGTSTP 18,20,24 Stop Stop typed at tty SIGTTIN 21,21,26 Stop tty input for background process SIGTTOU 22,22,27 Stop tty output for background process The signals SIGKILL and SIGSTOP cannot be caught, blocked, or ignored.
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