[Info-vax] scp or sftp: file is "raw", needs to be parsed - possible to work around that?

[John Reagan]

On Thursday, May 20, 2021 at 2:14:54 PM UTC-4, Craig A. Berry wrote:

> Right. Although it might be surprising to some people that compiling 
> with /DEFINE=(_USE_STD_STAT=1) gives you a stat struct that conforms to 
> an older standard rather than any recent one. And it's still a 
> portability problem. 
> 

Huh?  The latest POSIX standard (issue 7, 2018) says:

The <sys/stat.h> header shall define the stat structure, which shall include at least the following members:

dev_t st_dev            Device ID of device containing file. 
ino_t st_ino            File serial number. 
mode_t st_mode          Mode of file (see below). 
nlink_t st_nlink        Number of hard links to the file. 
uid_t st_uid            User ID of file. 
gid_t st_gid            Group ID of file. 
[XSI][Option Start]
dev_t st_rdev           Device ID (if file is character or block special). 
[Option End]
off_t st_size           For regular files, the file size in bytes. 
                        For symbolic links, the length in bytes of the 
                        pathname contained in the symbolic link. 
[SHM][Option Start]
                        For a shared memory object, the length in bytes. 
[Option End]
[TYM][Option Start]
                        For a typed memory object, the length in bytes. 
[Option End]
                        For other file types, the use of this field is 
                        unspecified. 
struct timespec st_atim Last data access timestamp. 
struct timespec st_mtim Last data modification timestamp. 
struct timespec st_ctim Last file status change timestamp. 
[XSI][Option Start]
blksize_t st_blksize    A file system-specific preferred I/O block size 
                        for this object. In some file system types, this 
                        may vary from file to file. 
blkcnt_t st_blocks      Number of blocks allocated for this object. 
[Option End]

Notice that it says "shall include at least the following members".

>From the current <stat.h> in the __USING_STD_STAT section

struct stat {
    __dev_t     st_dev;     /* device id */
    __ino_t     st_ino;     /* file number */
    __mode_t    st_mode;    /* file mode */
    __MODEFILL( st_mode)
    __nlink_t   st_nlink;   /* number of hard links */
    __uid_t     st_uid;     /* user id */
    __gid_t     st_gid;     /* group id */
    __dev_t     st_rdev;
    __off_t     st_size;    /* file size in bytes */
    __time_t    st_atime;   /* file access time */
    __TIMEFILL( st_atime)
    __time_t    st_mtime;   /* file mod time */
    __TIMEFILL( st_mtime)
    __time_t    st_ctime;   /* file creation time */
    __TIMEFILL( st_ctime)
    char        st_fab_rfm; /* record format */
    char        st_fab_rat; /* record attributes */
    char        st_fab_fsz; /* fixed header size */
    char        st_fabFill;
    unsigned    st_fab_mrs; /* record size */
    blksize_t   st_blksize; /* filesystem-specific preferred I/O block size for this file */
    blkcnt_t    st_blocks;  /* number of blocks allocated for this file */
    char        st_reserved[sizeof(__int64)*__STD_STAT_QWORDS_RESERVED];
};

#   pragma __member_alignment __restore

#else /* end of __USING_STD_STAT section */

We provide every field that POSIX defines plus a few more.