[PATCH v2 0/3] More ls improvements

[Glenn Washburn]

Currently when given a path to a file, ls will open the file to determine
if its is valid and then run the appropriate print function, in contrast to
directory arguments that use the directory iterator and callback on each
file. One issue with this is that opening a file does not allow access to
its modification time information, whereas the info object from the callback
called by the directory iterator does and the longlist print function will
print the modification time if present. The result is that when longlisting
ls arguments, directory arguments show moditication times but file arguments
do not. Patch 1 rectifies this an in the process simplifies the code path
by using the directory iterator for file arguments as well.

Patches 2 and 3 aim to make the output of GRUB's ls look more like GNU's
ls output. And patch 3 also fixes an issue where there are blank lines
between consecutive file arguments.

v2:
 * Remove first patch of v1
 * Reset grub_errno in grub_ls_list_files instead

Glenn Washburn (3):
  commands/ls: Allow printing mtime for file arguments
  commands/ls: Add directory header for dir args and print full paths
    for file args
  commands/ls: Proper line breaks between arguments

 grub-core/commands/ls.c | 123 ++++++++++++++++++++++++----------------
 1 file changed, 75 insertions(+), 48 deletions(-)

Range-diff against v1:
1:  c9066a31480c < -:  ------------ disk: Reset grub_errno upon entering 
grub_disk_read()
2:  8947f5257962 ! 1:  187a173d6e8a commands/ls: Allow printing mtime for file 
arguments
    @@ grub-core/commands/ls.c: grub_ls_list_files (char *dirname, int 
longlist, int al
            if (grub_errno == GRUB_ERR_BAD_FILE_TYPE
          && path[grub_strlen (path) - 1] != '/')
        {
    -     /* PATH might be a regular file.  */
    +-    /* PATH might be a regular file.  */
     -    char *p;
     -    grub_file_t file;
     -    struct grub_dirhook_info info;
    @@ grub-core/commands/ls.c: grub_ls_list_files (char *dirname, int 
longlist, int al
     -      goto fail;
     -
     -    grub_file_close (file);
    --
    ++    /*
    ++     * Reset errno as it is currently set, but will cause subsequent code
    ++     * to think there is an error.
    ++     */
    ++    grub_errno = GRUB_ERR_NONE;
    + 
     -    p = grub_strrchr (dirname, '/') + 1;
     -    ctx.dirname = grub_strndup (dirname, p - dirname);
    ++    /* PATH might be a regular file.  */
     +    ctx.filename = grub_strrchr (dirname, '/') + 1;
     +    ctx.dirname = grub_strndup (dirname, ctx.filename - dirname);
          if (ctx.dirname == NULL)
3:  ce655165f508 ! 2:  cd02a1fa4512 commands/ls: Add directory header for dir 
args and print full paths for file args
    @@ grub-core/commands/ls.c: grub_ls_list_files (char *dirname, int 
longlist, int al
      
            (fs->fs_dir) (dev, path, print_files, &ctx);
     @@ grub-core/commands/ls.c: grub_ls_list_files (char *dirname, int 
longlist, int all, int human)
    -     && path[grub_strlen (path) - 1] != '/')
    -   {
    +     grub_errno = GRUB_ERR_NONE;
    + 
          /* PATH might be a regular file.  */
     +    ctx.print_dirhdr = 0;
          ctx.filename = grub_strrchr (dirname, '/') + 1;
4:  1a14220825c2 = 3:  6988321447be commands/ls: Proper line breaks between 
arguments
-- 
2.34.1