Re: [patch] Fix handling of overlength pathname in AF_UNIX sun_path

On Thursday 2012-04-19 12:33, Michael Kerrisk (man-pages) wrote:

Anyway, I've dug deeper, looking at hat happens on other platforms.
It's a mess: the BSDs don't even guarantee  that sun_path is
null_terminated. So, here's how one has to portably deal with the
variations:

addrlen = sizeof(struct sockaddr_un);
cfd = accept(lfd, &addr, &addlen);

printf("%.*s", addrlen - offsetof(struct sockaddr_un, sun_path), addr.sun_path);

What operating system made you write that?


I just ask for fun and the record. Solaris's dirent is also
constructed such that using sizeof(...) is useless.

typedef struct dirent {
        ino_t           d_ino;          /* "inode number" of entry */
        off_t           d_off;          /* offset of disk directory entry */
        unsigned short  d_reclen;       /* length of this record */
        char            d_name[1];      /* name of file */
} dirent_t;