unix: Network entry API

libc-test/semver/linux-gnu.txt

@@ -611,6 +611,9 @@ getentropy
 getgrent_r
 getloadavg
 getmntent_r
+getnetbyaddr_r
+getnetbyname_r
+getnetent_r
 getpt
 getpwent_r
 getpwnam_r

libc-test/semver/linux.txt

@@ -4073,6 +4073,7 @@ dup3
 duplocale
 endgrent
 endmntent
+endnetent
 endpwent
 endservent
 endspent
@@ -4152,6 +4153,9 @@ getifaddrs
 getline
 getmntent
 getnameinfo
+getnetbyaddr
+getnetbyname
+getnetent
 getopt_long
 getpriority
 getpwent
@@ -4281,6 +4285,7 @@ msgsnd
 msqid_ds
 name_t
 name_to_handle_at
+netent
 newlocale
 nice
 nl_item
@@ -4471,6 +4476,7 @@ setgrent
 setgroups
 sethostname
 setmntent
+setnetent
 setns
 setpriority
 setpwent

src/unix/linux_like/linux/gnu/mod.rs

@@ -1136,6 +1136,30 @@ extern "C" {
         buflen: size_t,
         result: *mut *mut crate::group,
     ) -> c_int;
+    pub fn getnetent_r(
+        result_buf: *mut crate::netent,
+        buf: *mut c_char,
+        buflen: size_t,
+        result: *mut *mut crate::netent,
+        h_errnop: *mut c_int,
+    ) -> c_int;
+    pub fn getnetbyname_r(
+        name: *const c_char,
+        result_buf: *mut crate::netent,
+        buf: *mut c_char,
+        buflen: size_t,
+        result: *mut *mut crate::netent,
+        h_errnop: *mut c_int,
+    ) -> c_int;
+    pub fn getnetbyaddr_r(
+        net: u32,
+        type_: c_int,
+        result_buf: *mut crate::netent,
+        buf: *mut c_char,
+        buflen: size_t,
+        result: *mut *mut crate::netent,
+        h_errnop: *mut c_int,
+    ) -> c_int;
 
     pub fn putpwent(p: *const crate::passwd, stream: *mut crate::FILE) -> c_int;
     pub fn putgrent(grp: *const crate::group, stream: *mut crate::FILE) -> c_int;

src/unix/linux_like/linux/mod.rs

@@ -1128,6 +1128,14 @@ s! {
         pub ifi_flags: c_uint,
         pub ifi_change: c_uint,
     }
+
+    // netdb.h
+    pub struct netent {
+        pub n_name: *mut c_char,
+        pub n_aliases: *mut *mut c_char,
+        pub n_addrtype: c_int,
+        pub n_net: u32,
+    }
 }
 
 cfg_if! {
@@ -4088,6 +4096,11 @@ extern "C" {
         flags: c_int,
     ) -> c_int;
     pub fn open_by_handle_at(mount_fd: c_int, handle: *mut file_handle, flags: c_int) -> c_int;
+    pub fn getnetbyname(name: *const c_char) -> *mut netent;
+    pub fn getnetbyaddr(net: u32, type_: c_int) -> *mut netent;
+    pub fn getnetent() -> *mut netent;
+    pub fn setnetent(stayopen: c_int);
+    pub fn endnetent();
 }
 
 // LFS64 extensions