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cpermissionsposixmkdir

mkdir system call occasionally creates unreadable directory

I'm taking in an ouput folder name as an argument with argv[] and then executing the following code:

mkdir(outputname, "0777");

And sometimes it will work fine and create the folder with the correct permissions but occasionally the folder will get created and I won't be able to access the folder. Is this a common problem problem with a simple fix?

Solution

  • You're sending a string to mkdir for the mode, and this is the wrong type. If you include the correct headers the compiler should warn you about this. The fix is simple enough,

    #include <sys/stat.h>
#include <sys/types.h>
...
mkdir(outputname, 0777);