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Linux C 念书之 #include <sys/types.h>的干用

时间:2018-12-03 02:43来源:[db:来源] 作者:[db:作者] 点击:
#include 根本体系数据典型 是Unix/Linux体系的根本体系数据典型的头文件,含拥有size_t,time_t,pid_t等典型。linux编程中日日用到的头文件。 NAME sys/types.h - data types SYNOPSIS #include DESCRIPTION

  #include

  根本体系数据典型

  是Unix/Linux体系的根本体系数据典型的头文件,含拥有size_t,time_t,pid_t等典型。linux编程中日日用到的头文件。

  NAME

  sys/types.h - data types

  SYNOPSIS

  #include

  DESCRIPTION

  The header shall include definitions for at least the following types:

  blkcnt_t

  Used for file block counts.

  blksize_t

  Used for block sizes.

  clock_t

  Used for system times in clock ticks or CLOCKS_PER_SEC; see .

  clockid_t

  Used for clock ID type in the clock and timer functions.

  dev_t?Used for device IDs.

  fsblkcnt_t

  Used for file system block counts.

  fsfilcnt_t

  Used for file system file counts.

  gid_t?Used for group IDs.

  id_t?Used as a general identifier; can be used to contain at least a pid_t, uid_t, or gid_t.

  ino_t?Used for file serial numbers.

  key_t?Used for XSI interprocess communication.

  mode_t Used for some file attributes.

  nlink_t

  Used for link counts.

  off_t?Used for file sizes.

  pid_t?Used for process IDs and process group IDs.

  size_t Used for sizes of objects.

  ssize_t

  Used for a count of bytes or an error indication.

  suseconds_t

  Used for time in microseconds.

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