【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);
}
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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