Hey;
I'm trying to change the mode of a file in Linux system.
I know I must use chmod(const char* path, mode_t mode) but I don't really know how to handle the mode. How can I manipulate mode_t variable to apply my own mode?
Tellalca
19
Posting Whiz in Training
Tellalca
19
Posting Whiz in Training
thierrypin
0
Newbie Poster
I don't really know how to handle the mode. How can I manipulate mode_t variable to apply my own mode?
mode_t is simply an unsigned int. chmod checks its last 9 bits. Each 3 bits are for read, write, execute. The first three are for user, then for group and last for everyone else.
e.g.: If I want to allow "rwx------", id make mode be like [... 1 1 1 0 0 0 0 0 0]. This way:
mode = 256|128|64.If you want to make it allow everything for everyone, you do:
mode = 256|128|64|32....or simply:
511
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