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| author | Peter Lemenkov <lemenkov@gmail.com> | 2014-11-08 15:11:04 +0300 |
|---|---|---|
| committer | Peter Lemenkov <lemenkov@gmail.com> | 2014-12-15 21:05:05 +0300 |
| commit | 5cbad390e971ff92a7fb1b71757041ff9edeb81a (patch) | |
| tree | 5ea8891717e8d41ef64a351973e3a27608de50a2 /lib/kernel/src/os.erl | |
| parent | af87b1c3d4897840d8247589a88d3611106ecedc (diff) | |
| download | erlang-5cbad390e971ff92a7fb1b71757041ff9edeb81a.tar.gz | |
Introduce os:getenv/2
Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
Diffstat (limited to 'lib/kernel/src/os.erl')
| -rw-r--r-- | lib/kernel/src/os.erl | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/lib/kernel/src/os.erl b/lib/kernel/src/os.erl index 187fd0001b..8aaf13b3fd 100644 --- a/lib/kernel/src/os.erl +++ b/lib/kernel/src/os.erl @@ -26,7 +26,7 @@ %%% 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, timestamp/0, unsetenv/1]). -spec getenv() -> [string()]. @@ -39,6 +39,19 @@ 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(). |