linux 系调用手册

linux 系调用手册哪家强？原来梦里寻她千百度，默然回首，竞在man处

运行下面的命令，会有新发现，也助于记忆在何处寻找她
   ls /usr/share/man/man2

如何使用呢？
   man 2 systemscall_name
如:man 2 open

输出：

OPEN(2)                    Linux Programmer's Manual                   OPEN(2)


NAME
       open, creat - open and possibly create a file or device


SYNOPSIS
       #include
       #include
       #include


       int open(const char *pathname, int flags);
       int open(const char *pathname, int flags, mode_t mode);


       int creat(const char *pathname, mode_t mode);


DESCRIPTION
       Given a pathname for a file, open() returns a file descriptor, a small,
       nonnegative integer  for  use  in  subsequent  system  calls  (read(2),
       write(2), lseek(2), fcntl(2), etc.).  The file descriptor returned by a
       successful call will be the lowest-numbered file  descriptor  not  cur‐
       rently open for the process.


       By  default,  the  new  file descriptor is set to remain open across an
 Manual page open(2) line 1 (press h for help or q to quit)

清晰明了，特此分享，与君享用