diff options
Diffstat (limited to 'lib/kernel/src/os.erl')
| -rw-r--r-- | lib/kernel/src/os.erl | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/lib/kernel/src/os.erl b/lib/kernel/src/os.erl index d1feae771d..f6769df585 100644 --- a/lib/kernel/src/os.erl +++ b/lib/kernel/src/os.erl @@ -24,7 +24,10 @@ -include("file.hrl"). --spec type() -> 'vxworks' | {'unix',atom()} | {'win32',atom()} | {'ose',atom()}. +-spec type() -> vxworks | {Osfamily, Osname} when + Osfamily :: unix | win32, + Osname :: atom(). + type() -> case erlang:system_info(os_type) of {vxworks, _} -> @@ -32,18 +35,27 @@ type() -> Else -> Else end. --spec version() -> string() | {non_neg_integer(),non_neg_integer(),non_neg_integer()}. +-spec version() -> VersionString | {Major, Minor, Release} when + VersionString :: string(), + Major :: non_neg_integer(), + Minor :: non_neg_integer(), + Release :: non_neg_integer(). version() -> erlang:system_info(os_version). --spec find_executable(string()) -> string() | 'false'. +-spec find_executable(Name) -> Filename | 'false' when + Name :: string(), + Filename :: string(). find_executable(Name) -> case os:getenv("PATH") of false -> find_executable(Name, []); Path -> find_executable(Name, Path) end. --spec find_executable(string(), string()) -> string() | 'false'. +-spec find_executable(Name, Path) -> Filename | 'false' when + Name :: string(), + Path :: string(), + Filename :: string(). find_executable(Name, Path) -> Extensions = extensions(), case filename:pathtype(Name) of @@ -147,7 +159,8 @@ extensions() -> end. %% Executes the given command in the default shell for the operating system. --spec cmd(atom() | string() | [string()]) -> string(). +-spec cmd(Command) -> string() when + Command :: atom() | io_lib:chars(). cmd(Cmd) -> validate(Cmd), case type() of |