which returns the pathnames of the files (or links) which would be executed in the currente

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最新推荐文章于 2024-10-22 21:39:55 发布

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分类专栏： c/c++_debug

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本文介绍了一个实用的命令行工具which，用于查找并返回指定命令在当前环境中的完整路径。which遵循POSIX标准，通过搜索PATH环境变量来定位命令文件。

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langu@langu:~/linuxk/link/libstatic$ which gcc
/usr/bin/gcc

WHICH(1) WHICH(1)

NAME
       which - locate a command

SYNOPSIS
       which [-a] filename ...

DESCRIPTION
       which returns the pathnames of the files (or links) which would be executed in the current
       environment, had its arguments been given as commands in a strictly POSIX-conformant
       shell.   It does this by searching the PATH for executable files matching the names of the
       arguments. It does not follow symbolic links.

OPTIONS
       -a     print all matching pathnames of each argument

EXIT STATUS
       0      if all specified commands are found and executable

       1      if one or more specified commands is nonexistent or not executable

       2      if an invalid option is specified

Debian                                      1 May 2009                                   WHICH(1)