获取程序当前执行绝对路径

获取程序当前执行绝对路径

源码

#include <unistd.h>
#include <stdio.h>
#include <string.h>

static char* get_app_path()
{
	const int MAX_PATHSIZE = 256;
	static char cur_app_path[MAX_PATHSIZE] = {0};
	if(cur_app_path[0]) return cur_app_path;
	
	//获取当前程序的绝对路径
	ssize_t length = ::readlink("/proc/self/exe",cur_app_path,MAX_PATHSIZE-1);
	
	int path_len = strlen(cur_app_path);
	//获取当前目录绝对路径，即去掉程序名
	for(int i = path_len; i>=0; --i)
	{
		if(cur_app_path[i] == '/' || cur_app_path[i] == '\\')
		{
			cur_app_path[i+1] = '\0';
			break;
		}
	}
	printf("cur_app_path=%s\n",cur_app_path);
	return cur_app_path;
}

int main()
{
	get_app_path();
	return 0;
}

运行

[banting@localhost test]$ g++ -g app_path.cpp -o app_path
[banting@localhost test]$ ./app_path
cur_app_path=/home/banting/test/
[banting@localhost test]$ pwd
/home/banting/test
[banting@localhost test]$