Linux C 获取当前应用程序的绝对路径

1. 使用getcwd()获取的是当前工作路径，而不一定是程序的路径

#include <stdio.h>#include <stdlib.h>#include <unistd.h>#define MAXBUFSIZE 1024int main ( int argc, char * argv[] ){char buf[ MAXBUFSIZE ];getcwd(buf, MAXBUFSIZE);printf("\n");printf(buf);printf("\n");return 0;}

2. 下面这个是一个 x86_64 GNU/Linux Kernel 3.2.0-67-generic 系统中利用proc获取绝对路径的例子

    利用 readlink()

#include <stdio.h>#include <stdlib.h>#include <unistd.h>#define MAXBUFSIZE 1024int main ( int argc, char * argv[] ){char buf[ MAXBUFSIZE ];int count;count = readlink( "/proc/self/exe", buf, MAXBUFSIZE );if ( count < 0 || count >= MAXBUFSIZE ){ printf( "Failed\n" );return( EXIT_FAILURE );} buf[ count ] = '\0';printf( "/proc/self/exe -> [%s]\n", buf );return( EXIT_SUCCESS );}