用户信息获取程序例子

#include <stdio.h>
#include <pwd.h>

int main()
{
    struct passwd * pw;
    char *username = "root";
    pw = getpwnam(username);
    if (!pw) {
        printf("%s is not exist\n", username);
        return -1;
    }

    printf("pw->pw_name   = %s\n", pw->pw_name);
    printf("pw->pw_passwd = %s\n", pw->pw_passwd);
    printf("pw->pw_uid    = %d\n", pw->pw_uid);
    printf("pw->pw_gid    = %d\n", pw->pw_gid);
    printf("pw->pw_gecos = %s\n", pw->pw_gecos);
    printf("pw->pw_dir    = %s\n", pw->pw_dir);
    printf("pw->pw_shell = %s\n", pw->pw_shell);
}