mkdir在C的OS X上出现代字号失败? [英] mkdir fails with tilde on OS X in C?

问题描述

我正在将C库移植到OSX，到目前为止，这还没有让我感到很头疼.在下一个功能中:

I'm porting a C library to OSX which haven't given me much of a headache until now. In the next function:

int createDirectory( char *directory ){

    int error;

    error = mkdir(directory, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);

    if( error < 0 ){

        if( errno != EEXIST ){       

            return errno;                           
        }            
    }

    return error;        
}

无论directory是什么，mkdir()始终会因EPERM失败(不允许操作).我不确定xcode可执行文件是否已沙盒化或缺少什么内容，但是传递给该函数的每条路径均失败.

No matter what directory is, mkdir() always fails with EPERM (Operation not permitted). I'm not sure if the xcode executable is sandboxed or if I'm missing something, but every path I pass to the function fails.

我尝试从终端mkdir，并且创建文件夹没有问题，所以我不确定问题出在哪里.此功能在Linux和Solaris上正常运行.

I've tried to mkdir from the terminal and the folders are created without a problem, so I'm not sure where the problem is. This function works fine in Linux and Solaris.

示例路径:

"~/Library/Application\\ Support/myApp"
"~/Desktop/myApp"

第一个是库应创建的目录的实际示例.

The first one is an actual example of a directory the library should create.

推荐答案

OSX不会像bash那样扩展'~'字符(尽管它使用了bash).

OSX does not expand the '~' character as bash does (although it uses bash).

给出该程序，该程序在/tmp中运行:

Given this program, running in /tmp:

#include <stdlib.h>
#include <sys/stat.h>
#include <stdio.h>

int main(void)
{
    char *given = "~/Library";
    char result[1024];
    char *s;
    mkdir("~", 0755);
    mkdir("~/Library", 0755);
    if ((s = realpath(given, result)) != 0) {
        printf ("%s\n", s);
    } else {
        perror("realpath");
    }
    return 0;
}

我在OSX上得到了这个结果:

I get this result on OSX:

/private/tmp/~/Library

我在Linux(Debian)以及Solaris 10上都得到了这个结果:

I get this result on Linux (Debian) as well as with Solaris 10:

/tmp/~/Library

如 中所述，为什么波浪号(〜)用双引号引起来吗? ，这最初是csh shell 功能，其中bash

As noted in Why doesn't the tilde (~) expand inside double quotes?, this was originally a csh shell feature which bash incorporated long ago (citing a page from 1994). It is not implemented in any of the given systems' runtime libraries.

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