diff options
Diffstat (limited to 'lib/kernel/src/os.erl')
| -rw-r--r-- | lib/kernel/src/os.erl | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/lib/kernel/src/os.erl b/lib/kernel/src/os.erl index 187fd0001b..3647545777 100644 --- a/lib/kernel/src/os.erl +++ b/lib/kernel/src/os.erl @@ -26,7 +26,8 @@ %%% BIFs --export([getenv/0, getenv/1, getpid/0, putenv/2, timestamp/0, unsetenv/1]). +-export([getenv/0, getenv/1, getenv/2, getpid/0, putenv/2, system_time/0, system_time/1, + timestamp/0, unsetenv/1]). -spec getenv() -> [string()]. @@ -39,6 +40,19 @@ getenv() -> erlang:nif_error(undef). getenv(_) -> erlang:nif_error(undef). +-spec getenv(VarName, DefaultValue) -> Value when + VarName :: string(), + DefaultValue :: string(), + Value :: string(). + +getenv(VarName, DefaultValue) -> + case os:getenv(VarName) of + false -> + DefaultValue; + Value -> + Value + end. + -spec getpid() -> Value when Value :: string(). @@ -52,6 +66,17 @@ getpid() -> putenv(_, _) -> erlang:nif_error(undef). +-spec system_time() -> integer(). + +system_time() -> + erlang:nif_error(undef). + +-spec system_time(Unit) -> integer() when + Unit :: erlang:time_unit(). + +system_time(_Unit) -> + erlang:nif_error(undef). + -spec timestamp() -> Timestamp when Timestamp :: erlang:timestamp(). @@ -85,10 +110,7 @@ version() -> Name :: string(), Filename :: string(). find_executable(Name) -> - case os:getenv("PATH") of - false -> find_executable(Name, []); - Path -> find_executable(Name, Path) - end. + find_executable(Name, os:getenv("PATH", "")). -spec find_executable(Name, Path) -> Filename | 'false' when Name :: string(), |