1 files changed, 92 insertions, 0 deletions
diff --git a/node_modules/detect-libc/lib/detect-libc.js b/node_modules/detect-libc/lib/detect-libc.js
new file mode 100644
index 00000000..1855fe18
--- /dev/null
+++ b/node_modules/detect-libc/lib/detect-libc.js
@@ -0,0 +1,92 @@
+'use strict';
+
+var platform = require('os').platform();
+var spawnSync = require('child_process').spawnSync;
+var readdirSync = require('fs').readdirSync;
+
+var GLIBC = 'glibc';
+var MUSL = 'musl';
+
+var spawnOptions = {
+  encoding: 'utf8',
+  env: process.env
+};
+
+if (!spawnSync) {
+  spawnSync = function () {
+    return { status: 126, stdout: '', stderr: '' };
+  };
+}
+
+function contains (needle) {
+  return function (haystack) {
+    return haystack.indexOf(needle) !== -1;
+  };
+}
+
+function versionFromMuslLdd (out) {
+  return out.split(/[\r\n]+/)[1].trim().split(/\s/)[1];
+}
+
+function safeReaddirSync (path) {
+  try {
+    return readdirSync(path);
+  } catch (e) {}
+  return [];
+}
+
+var family = '';
+var version = '';
+var method = '';
+
+if (platform === 'linux') {
+  // Try getconf
+  var glibc = spawnSync('getconf', ['GNU_LIBC_VERSION'], spawnOptions);
+  if (glibc.status === 0) {
+    family = GLIBC;
+    version = glibc.stdout.trim().split(' ')[1];
+    method = 'getconf';
+  } else {
+    // Try ldd
+    var ldd = spawnSync('ldd', ['--version'], spawnOptions);
+    if (ldd.status === 0 && ldd.stdout.indexOf(MUSL) !== -1) {
+      family = MUSL;
+      version = versionFromMuslLdd(ldd.stdout);
+      method = 'ldd';
+    } else if (ldd.status === 1 && ldd.stderr.indexOf(MUSL) !== -1) {
+      family = MUSL;
+      version = versionFromMuslLdd(ldd.stderr);
+      method = 'ldd';
+    } else {
+      // Try filesystem (family only)
+      var lib = safeReaddirSync('/lib');
+      if (lib.some(contains('-linux-gnu'))) {
+        family = GLIBC;
+        method = 'filesystem';
+      } else if (lib.some(contains('libc.musl-'))) {
+        family = MUSL;
+        method = 'filesystem';
+      } else if (lib.some(contains('ld-musl-'))) {
+        family = MUSL;
+        method = 'filesystem';
+      } else {
+        var usrSbin = safeReaddirSync('/usr/sbin');
+        if (usrSbin.some(contains('glibc'))) {
+          family = GLIBC;
+          method = 'filesystem';
+        }
+      }
+    }
+  }
+}
+
+var isNonGlibcLinux = (family !== '' && family !== GLIBC);
+
+module.exports = {
+  GLIBC: GLIBC,
+  MUSL: MUSL,
+  family: family,
+  version: version,
+  method: method,
+  isNonGlibcLinux: isNonGlibcLinux
+};