Portable way to check if directory exists Windows Linux C

Question

I would like to check if a given directory exists  I know how to do this on Windows    BOOL DirectoryExists LPCTSTR szPath      DWORD dwAttrib   GetFileAttributes szPath      return  dwAttrib    INVALID FILE ATTRIBUTES  amp  amp             dwAttrib  amp  FILE ATTRIBUTE DIRECTORY        and Linux   DIR  dir   opendir  mydir    if  dir           Directory exists         closedir dir     else if  ENOENT    errno           Directory does not exist       else          opendir   failed for some other reason         But I need a portable way of doing this    Is there any way to check if a directory exists no matter what OS Im using  Maybe C standard library way    I know that I can use preprocessors directives and call those functions on different OSes but thats not the solution Im asking for   I END UP WITH THIS  AT LEAST FOR NOW    include  lt sys types h gt   include  lt sys stat h gt   include  lt stdio h gt   include  lt stdlib h gt   int dirExists const char  path        struct stat info       if stat  path   amp info      0          return 0      else if info st mode  amp  S IFDIR          return 1      else         return 0     int main int argc  char   argv        const char  path      TEST        printf   d n   dirExists path        return 0

User · Answer

With C  17 you can use std  filesystem  is directory function  https   en cppreference com w cpp filesystem is directory   It accepts a std  filesystem  path object which can be constructed with a unicode path

User · Answer

stat   works on Linux   UNIX and Windows as well    include  lt sys types h gt   include  lt sys stat h gt   struct stat info   if  stat  pathname   amp info      0       printf   cannot access  s n   pathname    else if  info st mode  amp  S IFDIR       S ISDIR   doesn t exist on my windows      printf    s is a directory n   pathname    else     printf    s is no directory n   pathname

User · Answer

Since I found that the above approved answer lacks some clarity and the op provides an incorrect solution that he she will use   I therefore hope that the below example will help others   The solution is more or less portable as well                                                                                      Checks to see if a directory exists  Note  This method only checks the    existence of the full path AND if path leaf is a dir         return   gt 0 if dir exists AND is a dir               0 if dir does not exist OR exists but not a dir               lt 0 if an error occurred  errno is also set                                                                                  int dirExists const char  const path        struct stat info       int statRC   stat  path   amp info        if  statRC    0                 if  errno    ENOENT     return 0       something along the path does not exist         if  errno    ENOTDIR    return 0       something in path prefix is not a dir         return -1             return   info st mode  amp  S IFDIR     1   0

User · Answer

You can use the GTK glib to abstract from OS stuff   glib provides a g dir open   function which should do the trick

User · Answer

Use boost  filesystem  that will give you a portable way of doing those kinds of things and abstract away all ugly details for you

[c] Portable way to check if directory exists [Windows/Linux, C]

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