Retrieve the contents of the named xattr

Retrieve the contents of the named xattr

get_xattr(path, name, follow_symlinks = TRUE)

Arguments

path	target path (file or dir); this is auto-expanded
name	xattr name to retrieve
follow_symlinks	if FALSE get xattr of the symlink vs the target it references

Note

You should really use get_xattr_raw()

Examples

# Create a temp file for the example
tf <- tempfile(fileext = ".csv")
write.csv(mtcars, tf)

# has attributes? (shld be FALSE)
has_xattrs(tf)
#> [1] FALSE
get_xattr(tf, "is.rud.setting")
#> character(0)

# set an attribute
set_xattr(tf, "is.rud.setting.a", "first attribut")
get_xattr(tf, "is.rud.setting.a")
#> [1] "first attribut"
get_xattr_size(tf, "is.rud.setting.a")
#> [1] 14

# shld be TRUE
has_xattrs(tf)
#> [1] TRUE

set_xattr(tf, "is.rud.setting.b", "second attribute")
get_xattr(tf, "is.rud.setting.b")
#> [1] "second attribute"
get_xattr_size(tf, "is.rud.setting.b")
#> [1] 16

# overwrite an attribute
set_xattr(tf, "is.rud.setting.a", "first attribute")
get_xattr(tf, "is.rud.setting.a")
#> [1] "first attribute"
get_xattr_size(tf, "is.rud.setting.a")
#> [1] 15

# see all the attributes
list_xattrs(tf)
#> [1] "is.rud.setting.a" "is.rud.setting.b"

# data frame vs individual functions
get_xattr_df(tf)
#> # A tibble: 2 x 3
#>   name              size contents  
#>   <chr>            <dbl> <list>    
#> 1 is.rud.setting.a    15 <raw [15]>
#> 2 is.rud.setting.b    16 <raw [16]>

# remove attribute
rm_xattr(tf, "is.rud.setting")
get_xattr(tf, "is.rud.setting")
#> character(0)

# cleanup
unlink(tf)