【前言】
工作目录与程序所在目录的区别:
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~$ ls -l /proc/self/cwd lrwxrwxrwx 1 walker walker 0 7月 10 10:12 /proc/self/cwd -> /home/walker
~$ ls -l /proc/self/exe lrwxrwxrwx 1 walker walker 0 7月 10 10:12 /proc/self/exe -> /bin/ls
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上面示例中/home/walker为ls程序当前工作目录,/bin/ls为ls程序实际所在目录。
1、Shell版
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#获取当前脚本所在绝对路径,需在脚本文件里方能执行 cur_dir=$( cd "$(dirname " $0 ")" ; pwd )
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2、C语言版
方法一:用realpath函数。这种方法用于开机启动程序获取自身目录会出错。
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#include <stdio.h> #include <string.h> #include <stdlib.h> #include <limits.h> #define MAX_SIZE (PATH_MAX+1) int main()
{ char current_absolute_path[MAX_SIZE];
//获取当前目录绝对路径
if (NULL == realpath( "./" , current_absolute_path))
{
printf ( "***Error***" );
exit (-1);
}
strcat (current_absolute_path, "/" );
printf ( "current absolute path:%s\n" , current_absolute_path);
exit (0);
} |
方法二:用getcwd函数。这种方法用于开机启动程序获取自身目录会出错。
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char current_absolute_path[MAX_SIZE];
//获取当前目录绝对路径 if (NULL == getcwd(current_absolute_path, MAX_SIZE))
{ printf ( "***Error***\n" );
exit (-1);
} printf ( "current absolute path:%s\n" , current_absolute_path);
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方法三:用readlink函数。这种方法最可靠,可用于开机启动程序获取自身目录。
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char current_absolute_path[MAX_SIZE];
//获取当前程序绝对路径 int cnt = readlink( "/proc/self/exe" , current_absolute_path, MAX_SIZE);
if (cnt < 0 || cnt >= MAX_SIZE)
{ printf ( "***Error***\n" );
exit (-1);
} //获取当前目录绝对路径,即去掉程序名 int i;
for (i = cnt; i >=0; --i)
{ if (current_absolute_path[i] == '/' )
{
current_absolute_path[i+1] = '\0' ;
break ;
}
} printf ( "current absolute path:%s\n" , current_absolute_path);
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*** walker * Updated 2015-7-10 ***
本文转自walker snapshot博客51CTO博客,原文链接http://blog.51cto.com/walkerqt/1029395如需转载请自行联系原作者
RQSLT