I think we should support Mac OS

[Jzow]

When I fork local the following errors occur when compiling locally. The error log probably means that my cargo source cannot find the corresponding os

   Compiling procfs v0.12.0
error[E0433]: failed to resolve: could not find `linux` in `os`
  --> /Users/jameszow/.cargo/registry/src/github.com-1ecc6299db9ec823/procfs-0.12.0/src/process/mod.rs:66:14
   |
66 | use std::os::linux::fs::MetadataExt;
   |              ^^^^^ could not find `linux` in `os`

error[E0425]: cannot find function `stat64` in crate `libc`
   --> /Users/jameszow/.cargo/registry/src/github.com-1ecc6299db9ec823/procfs-0.12.0/src/process/namespaces.rs:25:31
    |
25  |             if unsafe { libc::stat64(cstr.as_ptr(), &mut stat) } != 0 {
    |                               ^^^^^^ help: a function with a similar name exists: `stat`
    |
   ::: /Users/jameszow/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.126/src/unix/mod.rs:726:5
    |
726 |     pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
    |     ----------------------------------------------------------- similarly named function `stat` defined here

   Compiling http-body v0.1.0
error[E0599]: no method named `st_mode` found for struct `Metadata` in the current scope
   --> /Users/jameszow/.cargo/registry/src/github.com-1ecc6299db9ec823/procfs-0.12.0/src/process/mod.rs:701:23
    |
701 |             mode: (md.st_mode() as libc::mode_t) & libc::S_IRWXU,
    |                       ^^^^^^^ method not found in `Metadata`
    |
   ::: /Users/jameszow/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/src/rust/library/std/src/os/macos/fs.rs:34:8
    |
34  |     fn st_mode(&self) -> u32;
    |        ------- the method is available for `Metadata` here
    |
    = help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
    |
55  | use std::os::macos::fs::MetadataExt;
    |

error[E0599]: no method named `st_uid` found for struct `Metadata` in the current scope
   --> /Users/jameszow/.cargo/registry/src/github.com-1ecc6299db9ec823/procfs-0.12.0/src/process/mod.rs:759:23
    |
759 |             owner: md.st_uid(),
    |                       ^^^^^^ method not found in `Metadata`
    |
   ::: /Users/jameszow/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/src/rust/library/std/src/os/macos/fs.rs:38:8
    |
38  |     fn st_uid(&self) -> u32;
    |        ------ the method is available for `Metadata` here
    |
    = help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
    |
55  | use std::os::macos::fs::MetadataExt;
    |

error[E0599]: no method named `st_mode` found for struct `Metadata` in the current scope
   --> /Users/jameszow/.cargo/registry/src/github.com-1ecc6299db9ec823/procfs-0.12.0/src/process/mod.rs:994:31
    |
994 |                     mode: (md.st_mode() as libc::mode_t) & libc::S_IRWXU,
    |                               ^^^^^^^ method not found in `Metadata`
    |
   ::: /Users/jameszow/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/src/rust/library/std/src/os/macos/fs.rs:34:8
    |
34  |     fn st_mode(&self) -> u32;
    |        ------- the method is available for `Metadata` here
    |
    = help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
    |
55  | use std::os::macos::fs::MetadataExt;
    |

Some errors have detailed explanations: E0425, E0433, E0599.
For more information about an error, try `rustc --explain E0425`.
error: could not compile `procfs` due to 5 previous errors

[xiaoquanju]

tat-agent 依赖了procfs，这个库目前不支持mac。tat-agent用来支持云上的虚拟机，mac暂时不能在云上运行。所以支持mac意义不大。 你可以开一个linux 虚拟机或者在云上买一台开发机。