readRegistry
Read a Windows Registry Hive
On Windows, read values of keys in the Windows Registry, and optionally whole hives.
- Keywords
- utilities
Usage
readRegistry(key, hive = c("HLM", "HCR", "HCU", "HU", "HCC", "HPD"),
maxdepth = 1, view = c("default", "32-bit", "64-bit"))Arguments
- key
character string, the path to the key in the Windows Registry.
- hive
The ‘hive’ containing the key. The abbreviations are for
HKEY_LOCAL_MACHINE,HKEY_CLASSES_ROOT.HKEY_CURRENT_USER,HKEY_USERS,HKEY_CURRENT_CONFIGandHKEY_PERFORMANCE_DATA- maxdepth
How far to recurse into the subkeys of the key. By default only the values of the key and the names of subkeys are returned.
- view
On 64-bit Windows, the view of the Registry to be used: see ‘Details’.
Details
Registry access is done using the security settings of the current R
session: this means that some Registry keys may not be accessible even
if they exist. This may result in NULL values in the object
returned, and, possibly, empty element names.
On 64-bit Windows, this will by default read the 32-bit view of the Registry when run from 32-bit R, and the 64-bit view when run from 64-bit R: see https://msdn.microsoft.com/en-us/library/aa384232(VS.85).aspx.
Value
A named list of values and subkeys (which may themselves be named lists). The default value (if any) precedes named values which precede subkeys, and both the latter sets are sorted alphabetically.
Note
This is only available on Windows.
Examples
library(utils)
# NOT RUN {
if(.Platform$OS.type == "windows") withAutoprint({
## only in HLM if set in an admin-mode install.
try(readRegistry("SOFTWARE\\R-core", maxdepth = 3))
gmt <- file.path("SOFTWARE", "Microsoft", "Windows NT",
"CurrentVersion", "Time Zones",
"GMT Standard Time", fsep = "\\")
readRegistry(gmt, "HLM")
})
# }
# NOT RUN {
<!-- %donttest -->
# }
# NOT RUN {
## on a 64-bit R need this to find 32-bit JAGS
readRegistry("SOFTWARE\\JAGS", maxdepth = 3, view = "32")
## See if there is a 64-bit user install
readRegistry("SOFTWARE\\R-core\\R64", "HCU", maxdepth = 2)
# }