Add a number of native calls to prepare for stat in PowerShell

build.psm1

@@ -439,6 +439,19 @@ function Start-BuildNativeUnixBinaries {
 
     git clean -qfdX $Native
 
+    # the stat tests rely on stat(1). On most platforms, this is /usr/bin/stat,
+    # but on alpine it is in /bin. Be sure that /usr/bin/stat exists, or
+    # create a link from /bin/stat. If /bin/stat is missing, we'll have to fail the build
+
+    if ( ! (Test-Path /usr/bin/stat) ) {
+        if ( Test-Path /bin/stat ) {
+            New-Item -Type SymbolicLink -Path /usr/bin/stat -Target /bin/stat
+        }
+        else {
+            throw "Cannot create symlink to stat(1)"
+        }
+    }
+
     try {
         Push-Location $Native
         if ($BuildLinuxArm) {
@@ -1927,7 +1940,7 @@ function Start-PSBootstrap {
 
             # Install ours and .NET's dependencies
             $Deps = @()
-            if ($Environment.IsUbuntu) {
+            if ($Environment.IsUbuntu -or $Environment.IsDebian) {
                 # Build tools
                 $Deps += "curl", "g++", "cmake", "make"
 
@@ -1985,7 +1998,8 @@ function Start-PSBootstrap {
                 }
             } elseif ($Environment.IsSUSEFamily) {
                 # Build tools
-                $Deps += "gcc", "cmake", "make"
+                # we're using a flag which requires an up to date compiler
+                $Deps += "gcc7", "cmake", "make", "gcc7-c++"
 
                 # Packaging tools
                 if ($Package) { $Deps += "ruby-devel", "rpmbuild", "groff", 'libffi-devel' }
@@ -2003,6 +2017,21 @@ function Start-PSBootstrap {
                 Start-NativeExecution {
                     Invoke-Expression "$baseCommand $Deps"
                 }
+
+                # After installation, create the appropriate symbolic links
+                foreach ($compiler in "gcc-7","g++-7") {
+                    $itemPath = "/usr/bin/${compiler}"
+                    $name = $compiler -replace "-7"
+                    $linkPath = "/usr/bin/${name}"
+                    $link = Get-Item -Path $linkPath -ErrorAction SilentlyContinue
+                    if ($link) {
+                        if ($link.Target) { # Symbolic link - remove it
+                            Remove-Item -Force -Path $linkPath
+                        }
+                    }
+                    New-Item -Type SymbolicLink -Target $itemPath -Path $linkPath
+                }
+
             } elseif ($Environment.IsMacOS) {
                 precheck 'brew' "Bootstrap dependency 'brew' not found, must install Homebrew! See http://brew.sh/"
 

src/libpsl-native/gmock.pc

@@ -0,0 +1,9 @@
+libdir=/usr/local/lib
+includedir=/usr/local/include
+
+Name: gmock
+Description: GoogleMock (without main() function)
+Version: 1.9.0
+URL: https://github.com/google/googletest
+Libs: -L${libdir} -lgmock 
+Cflags: -I${includedir} -DGTEST_HAS_PTHREAD=1 

src/libpsl-native/gmock_main.pc

@@ -0,0 +1,9 @@
+libdir=/usr/local/lib
+includedir=/usr/local/include
+
+Name: gmock_main
+Description: GoogleMock (with main() function)
+Version: 1.9.0
+URL: https://github.com/google/googletest
+Libs: -L${libdir} -lgmock_main 
+Cflags: -I${includedir} -DGTEST_HAS_PTHREAD=1 

src/libpsl-native/gtest.pc

@@ -0,0 +1,9 @@
+libdir=/usr/local/lib
+includedir=/usr/local/include
+
+Name: gtest
+Description: GoogleTest (without main() function)
+Version: 1.9.0
+URL: https://github.com/google/googletest
+Libs: -L${libdir} -lgtest 
+Cflags: -I${includedir} -DGTEST_HAS_PTHREAD=1 

src/libpsl-native/gtest_main.pc

@@ -0,0 +1,10 @@
+libdir=/usr/local/lib
+includedir=/usr/local/include
+
+Name: gtest_main
+Description: GoogleTest (with main() function)
+Version: 1.9.0
+URL: https://github.com/google/googletest
+Requires: gtest
+Libs: -L${libdir} -lgtest_main 
+Cflags: -I${includedir} -DGTEST_HAS_PTHREAD=1 

src/libpsl-native/src/CMakeLists.txt

@@ -2,7 +2,11 @@ include(CheckIncludeFiles)
 
 add_library(psl-native SHARED
   getstat.cpp
+  getlstat.cpp
+  getcommonstat.cpp
+  getcommonlstat.cpp
   getpwuid.cpp
+  getgrgid.cpp
   getppid.cpp
   getuserfrompid.cpp
   getfileowner.cpp

src/libpsl-native/src/getcommonlstat.cpp

@@ -0,0 +1,59 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+//! @brief returns the stat of a file
+
+#include <errno.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <pwd.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <stdio.h>
+
+#include "getcommonlstat.h"
+
+// Provide a common structure for the various different stat structures.
+// This should be safe to call on all platforms
+int GetCommonLStat(const char* path, struct CommonStat* commonStat)
+{
+    struct stat st;
+    assert(path);
+    errno = 0;
+    if (lstat(path, &st) == 0)
+    {
+        commonStat->Inode = st.st_ino;
+        commonStat->Mode = st.st_mode;
+        commonStat->UserId = st.st_uid;
+        commonStat->GroupId = st.st_gid;
+        commonStat->HardlinkCount = st.st_nlink;
+        commonStat->Size = st.st_size;
+#if defined (__APPLE__)
+        commonStat->AccessTime   = st.st_atimespec.tv_sec;
+        commonStat->ModifiedTime = st.st_mtimespec.tv_sec;
+        commonStat->ChangeTime = st.st_ctimespec.tv_sec;
+#else
+        commonStat->AccessTime   = st.st_atime;
+        commonStat->ModifiedTime = st.st_mtime;
+        commonStat->ChangeTime = st.st_ctime;
+#endif
+        commonStat->BlockSize = st.st_blksize;
+        commonStat->DeviceId = st.st_dev;
+        commonStat->NumberOfBlocks = st.st_blocks;
+        commonStat->IsBlockDevice = S_ISBLK(st.st_mode);
+        commonStat->IsCharacterDevice = S_ISCHR(st.st_mode);
+        commonStat->IsDirectory = S_ISDIR(st.st_mode);
+        commonStat->IsFile = S_ISREG(st.st_mode);
+        commonStat->IsNamedPipe = S_ISFIFO(st.st_mode);
+        commonStat->IsSocket = S_ISSOCK(st.st_mode);
+        commonStat->IsSymbolicLink = S_ISLNK(st.st_mode);
+        commonStat->IsSetUid = (st.st_mode & 0xE00) == S_ISUID;
+        commonStat->IsSetGid = (st.st_mode & 0xE00) == S_ISGID;
+        commonStat->IsSticky = (st.st_mode & 0xE00) == S_ISVTX;
+        return 0;
+    }
+    return -1;
+}
+

src/libpsl-native/src/getcommonlstat.h

@@ -0,0 +1,18 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#pragma once
+
+#include "pal.h"
+
+#include <sys/stat.h>
+
+#include "getcommonstat.h"
+
+PAL_BEGIN_EXTERNC
+
+int32_t GetLStat(const char* path, struct stat* buf);
+int GetCommonLStat(const char* path, CommonStat* cs);
+
+PAL_END_EXTERNC
+

src/libpsl-native/src/getcommonstat.cpp

@@ -0,0 +1,59 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+//! @brief returns the stat of a file
+
+#include "getcommonstat.h"
+
+#include <errno.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <pwd.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <stdio.h>
+
+// Provide a common structure for the various different stat structures.
+// This should be safe to call on all platforms
+int GetCommonStat(const char* path, struct CommonStat* commonStat)
+{
+    struct stat st;
+    assert(path);
+    errno = 0;
+    if (stat(path, &st) == 0)
+    {
+        commonStat->Inode = st.st_ino;
+        commonStat->Mode = st.st_mode;
+        commonStat->UserId = st.st_uid;
+        commonStat->GroupId = st.st_gid;
+        commonStat->HardlinkCount = st.st_nlink;
+        commonStat->Size = st.st_size;
+#if defined (__APPLE__)
+        commonStat->AccessTime   = st.st_atimespec.tv_sec;
+        commonStat->ModifiedTime = st.st_mtimespec.tv_sec;
+        commonStat->ChangeTime = st.st_ctimespec.tv_sec;
+#else
+        commonStat->AccessTime   = st.st_atime;
+        commonStat->ModifiedTime = st.st_mtime;
+        commonStat->ChangeTime = st.st_ctime;
+#endif
+        commonStat->BlockSize = st.st_blksize;
+        commonStat->DeviceId = st.st_dev;
+        commonStat->NumberOfBlocks = st.st_blocks;
+        commonStat->IsBlockDevice = S_ISBLK(st.st_mode);
+        commonStat->IsCharacterDevice = S_ISCHR(st.st_mode);
+        commonStat->IsDirectory = S_ISDIR(st.st_mode);
+        commonStat->IsFile = S_ISREG(st.st_mode);
+        commonStat->IsNamedPipe = S_ISFIFO(st.st_mode);
+        commonStat->IsSocket = S_ISSOCK(st.st_mode);
+        commonStat->IsSymbolicLink = S_ISLNK(st.st_mode);
+        commonStat->IsSetUid = (st.st_mode & 0xE00) == S_ISUID;
+        commonStat->IsSetGid = (st.st_mode & 0xE00) == S_ISGID;
+        commonStat->IsSticky = (st.st_mode & 0xE00) == S_ISVTX;
+        return 0;
+    }
+    return -1;
+}
+

src/libpsl-native/src/getcommonstat.h

@@ -0,0 +1,42 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#pragma once
+
+#include "pal.h"
+
+#include <sys/stat.h>
+
+PAL_BEGIN_EXTERNC
+
+struct CommonStat
+{
+    long Inode;
+    int Mode;
+    int UserId;
+    int GroupId;
+    int HardlinkCount;
+    long Size;
+    long AccessTime;
+    long ModifiedTime;
+    long ChangeTime;
+    long BlockSize;
+    int DeviceId;
+    int NumberOfBlocks;
+    int IsDirectory;
+    int IsFile;
+    int IsSymbolicLink;
+    int IsBlockDevice;
+    int IsCharacterDevice;
+    int IsNamedPipe;
+    int IsSocket;
+    int IsSetUid;
+    int IsSetGid;
+    int IsSticky;
+};
+
+int32_t GetStat(const char* path, struct stat* buf);
+int GetCommonStat(const char* path, CommonStat* cs);
+
+PAL_END_EXTERNC
+

src/libpsl-native/src/getgrgid.cpp

@@ -0,0 +1,68 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+//! @brief returns the groupname for a gid
+
+#include "getgrgid.h"
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <grp.h>
+#include <string.h>
+#include <unistd.h>
+
+//! @brief GetGrGid returns the groupname for a gid
+//!
+//! GetGrGid
+//!
+//! @param[in] gid
+//! @parblock
+//! The group identifier to lookup.
+//! @endparblock
+//!
+//! @retval groupname as UTF-8 string, or NULL if unsuccessful
+//!
+char* GetGrGid(gid_t gid)
+{
+    int32_t ret = 0;
+    struct group grp;
+    struct group* result = NULL;
+    char* buf;
+
+    int buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
+    if (buflen < 1)
+    {
+        buflen = 2048;
+    }
+
+allocate:
+    buf = (char*)calloc(buflen, sizeof(char));
+
+    errno = 0;
+    ret = getgrgid_r(gid, &grp, buf, buflen, &result);
+
+    if (ret != 0)
+    {
+        if (errno == ERANGE)
+        {
+            free(buf);
+            buflen *= 2;
+            goto allocate;
+        }
+        return NULL;
+    }
+
+    // no group found
+    if (result == NULL)
+    {
+        return NULL;
+    }
+
+    // allocate copy on heap so CLR can free it
+    size_t userlen = strnlen(grp.gr_name, buflen);
+    char* groupname = strndup(grp.gr_name, userlen);
+    free(buf);
+    return groupname;
+}
+

src/libpsl-native/src/getgrgid.h

@@ -0,0 +1,15 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#pragma once
+
+#include "pal.h"
+
+#include <sys/types.h>
+
+PAL_BEGIN_EXTERNC
+
+char* GetGrGid(gid_t gid);
+
+PAL_END_EXTERNC
+