파일 존재 유무 파악 _access

#include  

// Check for existence.
if( (_access( "crt_ACCESS.C", 0 )) != -1 )
{
    printf_s( "File crt_ACCESS.C exists.\n" );

    // Check for write permission.
    // Assume file is read-only.
    if( (_access( "crt_ACCESS.C", 2 )) == -1 )
        printf_s( "File crt_ACCESS.C does not have write permission.\n" );
}

_access 설명 보기

int _access( 
   const char *path, 
   int mode 
);


Parameters
path
    File or directory path.
mode
    Read/write attribute.


Return Value

Each function returns 0 if the file has the given mode. The function returns ?1 if the named file does not exist or does not have the given mode; in this case, errno is set as shown in the following table.

    EACCES
        Access denied: the file's permission setting does not allow specified access.

    ENOENT
        File name or path not found.

    EINVAL
        Invalid parameter.


Remark
    mode value    Checks file for
    00            Existence only
    02            Write-only
    04            Read-only
    06            Read and write

출처 : MSDN
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Original Post : http://neodreamer-dev.tistory.com/386