c - Linux函数，为什么里面有数字？

Question

比如execve(2)是execve的函数 login(1)是login的函数，数字是什么意思？

标签： clinux

Answer 1

这些是手册部分编号。从手册：

 The table below shows the section numbers of the manual followed
 by the types of pages they contain.

   1   Executable programs or shell commands
   2   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, e.g. /etc/passwd
   6   Games
   7   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]