Question

我使用 dll 从C程序运行一些fortran源代码。我想在Fortran中使用 CALL GETCWD（DIRNAME）来访问文件。当前工作目录（CWD）是我的fortran dll所在的目录还是我的C代码所在的目录？

Answer 1

CWD 表示 C urrent W orking D irectory ，并且（通常）是启动当前进程的目录。检查[man7]: GETCWD(3)了解更多详情。我准备了一个小例子，以更好地了解发生了什么。

code.c ：

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

#define PATH_SIZE 0x0200


int main() {
    char buf[PATH_SIZE];
    if (getcwd(buf, PATH_SIZE) == NULL) {
        printf("Error %d getting CWD\n", errno);
        return 1;
    }
    printf("CWD: [%s]\n", buf);
    return 0;
}

输出：

[cfati@cfati-ubtu16x64-0:~/Work/Dev/StackOverflow/q054306561]> ls
code.c
[cfati@cfati-ubtu16x64-0:~/Work/Dev/StackOverflow/q054306561]> gcc -o cwd code.c
[cfati@cfati-ubtu16x64-0:~/Work/Dev/StackOverflow/q054306561]> ls
code.c  cwd
[cfati@cfati-ubtu16x64-0:~/Work/Dev/StackOverflow/q054306561]> ./cwd
CWD: [/home/cfati/Work/Dev/StackOverflow/q054306561]
[cfati@cfati-ubtu16x64-0:~/Work/Dev/StackOverflow/q054306561]> pushd .. && ./q054306561/cwd && popd
~/Work/Dev/StackOverflow ~/Work/Dev/StackOverflow/q054306561
CWD: [/home/cfati/Work/Dev/StackOverflow]
~/Work/Dev/StackOverflow/q054306561
[cfati@cfati-ubtu16x64-0:~/Work/Dev/StackOverflow/q054306561]> mkdir test && pushd test && ../cwd && popd
~/Work/Dev/StackOverflow/q054306561/test ~/Work/Dev/StackOverflow/q054306561
CWD: [/home/cfati/Work/Dev/StackOverflow/q054306561/test]
~/Work/Dev/StackOverflow/q054306561

执行dll时的当前工作目录

1 个答案: