Is there a C function to get permissions of a file?

Question

I am writing a c program to be run on UNIX, and attempting to utilize the chmod command. After consulting the man pages, i know that chmod needs two parameters. first is the

Answer 1

The permission can be checked using stat(2), extracting information from S_* flags. Here a function using stat(2):

#include 
#include 
#include 
#include 


int getChmod(const char *path){
    struct stat ret;

    if (stat(path, &ret) == -1) {
        return -1;
    }

    return (ret.st_mode & S_IRUSR)|(ret.st_mode & S_IWUSR)|(ret.st_mode & S_IXUSR)|/*owner*/
        (ret.st_mode & S_IRGRP)|(ret.st_mode & S_IWGRP)|(ret.st_mode & S_IXGRP)|/*group*/
        (ret.st_mode & S_IROTH)|(ret.st_mode & S_IWOTH)|(ret.st_mode & S_IXOTH);/*other*/
}

int main(){

    printf("%0X\n",getChmod("/etc/passwd"));

    return 0;
}