【前言】
工作目录与程序所在目录的区别:
~$ 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
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
#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)
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。
#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。
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);
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。
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);
*** walker * Updated 2015-7-10 ***
本文出自 “walker的流水账” 博客,请务必保留此出处http://walkerqt.blog.51cto.com/1310630/1029395