c copy file permissions from another file

问题:

What's the simplest way to copy the unix file permissions of a file and set them to another file? Is there a way to store a file's permissions to a variable and then use that variable to set those permissions to another file?

回答1:

Sure. Use stat() and chmod() (may need root).

#include <sys/stat.h>

struct stat st;
stat("/foo/bar.txt", &st);
chmod("/baz/quirk.jpg", st.st_mode);