1、獲取當(dāng)前程序的絕對(duì)路徑

/proc/self/exe是一個(gè)符號(hào)鏈接，代表當(dāng)前程序的絕對(duì)路徑
用readlink讀取/proc/self/exe可以獲取當(dāng)前程序的絕對(duì)路徑

2、從字符串中獲取目錄

char dirname(char path);

3、改變當(dāng)前工作目錄

int chdir(const char *path );

4、完整示例

#include <unistd.h>
#include <linux/limits.h>
#include <libgen.h>void changeWorkDir()
{char exePath[PATH_MAX];memset(exePath, 0, sizeof(exePath));readlink("/proc/self/exe", exePath, sizeof(exePath));char *exeDir = dirname(exePath);chdir(exeDir);
}int main()
{changeWorkDir();return 0;
}