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MSYS2-packages/msys2-runtime-3.6/0006-Move-root-to-usr.-Change-sorting-mount-points.-By-de.patch
Christoph Reiter ad84925b51 Add msys2-runtime-3.6
2025-03-31 07:42:01 +02:00

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From 83c84acd7c46696e4ddd5df8ce3f097de85a61d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=90=D0=BB=D0=B5=D0=BA=D1=81=D0=B5=D0=B8=CC=86=20=D0=9F?=
=?UTF-8?q?=D0=B0=D0=B2=D0=BB=D0=BE=D0=B2?= <alexey.pawlow@gmail.com>
Date: Sun, 14 Apr 2019 21:45:06 +0300
Subject: [PATCH 06/N] - Move root to /usr. - Change sorting mount points. -
By default mount without ACLs. - Can read /etc/fstab with short mount point
format.
---
winsup/cygwin/local_includes/mount.h | 3 +-
winsup/cygwin/mm/cygheap.cc | 12 +-
winsup/cygwin/mount.cc | 185 +++++++++++++++++++++++----
winsup/cygwin/uinfo.cc | 2 +-
4 files changed, 174 insertions(+), 28 deletions(-)
diff --git a/winsup/cygwin/local_includes/mount.h b/winsup/cygwin/local_includes/mount.h
index 163b475..15e9a34 100644
--- a/winsup/cygwin/local_includes/mount.h
+++ b/winsup/cygwin/local_includes/mount.h
@@ -173,7 +173,6 @@ class mount_info
mount_item mount[MAX_MOUNTS];
static bool got_usr_bin;
- static bool got_usr_lib;
static int root_idx;
/* cygdrive_prefix is used as the root of the path automatically
@@ -185,6 +184,8 @@ class mount_info
private:
int posix_sorted[MAX_MOUNTS];
int native_sorted[MAX_MOUNTS];
+ int longest_posix_sorted[MAX_MOUNTS];
+ int shortest_native_sorted[MAX_MOUNTS];
public:
void init (bool);
diff --git a/winsup/cygwin/mm/cygheap.cc b/winsup/cygwin/mm/cygheap.cc
index 4cc8517..c4f15d5 100644
--- a/winsup/cygwin/mm/cygheap.cc
+++ b/winsup/cygwin/mm/cygheap.cc
@@ -220,14 +220,22 @@ init_cygheap::init_installation_root ()
/* Strip off last path component ("\\cygwin1.dll") */
PWCHAR w = wcsrchr (installation_root_buf, L'\\');
+#ifdef __MSYS__
+ /* Back two folders to get root as we have all stuff in usr subfolder */
+ for (int i=1; i >=0; --i)
+ {
+#endif
if (w)
{
*w = L'\0';
w = wcsrchr (installation_root_buf, L'\\');
}
if (!w)
- api_fatal ("Can't initialize Cygwin installation root dir.\n"
+ api_fatal ("Can't initialize MSYS2 installation root dir.\n"
"Invalid DLL path");
+#ifdef __MSYS__
+ }
+#endif
/* Copy result into installation_dir before stripping off "bin" dir and
revert to Win32 path. This path is added to the Windows environment
@@ -252,6 +260,7 @@ init_cygheap::init_installation_root ()
RtlInitUnicodeString (&installation_root, installation_root_buf);
RtlInitUnicodeString (&installation_dir, installation_dir_buf);
+#ifndef __MSYS__
for (int i = 1; i >= 0; --i)
{
reg_key r (i, KEY_WRITE, _WIDE (CYGWIN_INFO_INSTALLATIONS_NAME),
@@ -260,6 +269,7 @@ init_cygheap::init_installation_root ()
installation_root_buf)))
break;
}
+#endif
}
/* Initialize bucket_val. The value is the max size of a block
diff --git a/winsup/cygwin/mount.cc b/winsup/cygwin/mount.cc
index 1cfee5c..affb7e9 100644
--- a/winsup/cygwin/mount.cc
+++ b/winsup/cygwin/mount.cc
@@ -42,7 +42,6 @@ details. */
(path_prefix_p (proc, (path), proc_len, false))
bool NO_COPY mount_info::got_usr_bin;
-bool NO_COPY mount_info::got_usr_lib;
int NO_COPY mount_info::root_idx = -1;
/* is_native_path: Return non-zero if PATH starts with \??\[a-zA-Z] or
@@ -395,7 +394,6 @@ fs_info::update (PUNICODE_STRING upath, HANDLE in_vol)
#define MINIMAL_WIN_NTFS_FLAGS (FILE_CASE_SENSITIVE_SEARCH \
| FILE_CASE_PRESERVED_NAMES \
| FILE_UNICODE_ON_DISK \
- | FILE_PERSISTENT_ACLS \
| FILE_FILE_COMPRESSION \
| FILE_VOLUME_QUOTAS \
| FILE_SUPPORTS_SPARSE_FILES \
@@ -552,13 +550,13 @@ mount_info::create_root_entry (const PWCHAR root)
sys_wcstombs (native_root, PATH_MAX, root);
assert (*native_root != '\0');
if (add_item (native_root, "/",
- MOUNT_SYSTEM | MOUNT_IMMUTABLE | MOUNT_AUTOMATIC)
+ MOUNT_SYSTEM | MOUNT_IMMUTABLE | MOUNT_AUTOMATIC | MOUNT_NOACL)
< 0)
api_fatal ("add_item (\"%s\", \"/\", ...) failed, errno %d", native_root, errno);
/* Create a default cygdrive entry. Note that this is a user entry.
This allows to override it with mount, unless the sysadmin created
a cygdrive entry in /etc/fstab. */
- cygdrive_flags = MOUNT_NOPOSIX | MOUNT_CYGDRIVE;
+ cygdrive_flags = MOUNT_NOPOSIX | MOUNT_CYGDRIVE | MOUNT_NOACL;
strcpy (cygdrive, CYGWIN_INFO_CYGDRIVE_DEFAULT_PREFIX "/");
cygdrive_len = strlen (cygdrive);
}
@@ -578,22 +576,14 @@ mount_info::init (bool user_init)
pathend = wcpcpy (pathend, L"\\etc\\fstab");
from_fstab (user_init, path, pathend);
- if (!user_init && (!got_usr_bin || !got_usr_lib))
+ if (!user_init && !got_usr_bin)
{
char native[PATH_MAX];
if (root_idx < 0)
- api_fatal ("root_idx %d, user_shared magic %y, nmounts %d", root_idx, user_shared->version, nmounts);
+ api_fatal ("root_idx %d, user_shared magic %y, nmounts %d", root_idx, user_shared->version, nmounts);
char *p = stpcpy (native, mount[root_idx].native_path);
- if (!got_usr_bin)
- {
- stpcpy (p, "\\bin");
- add_item (native, "/usr/bin", MOUNT_SYSTEM | MOUNT_AUTOMATIC);
- }
- if (!got_usr_lib)
- {
- stpcpy (p, "\\lib");
- add_item (native, "/usr/lib", MOUNT_SYSTEM | MOUNT_AUTOMATIC);
- }
+ stpcpy (p, "\\usr\\bin");
+ add_item (native, "/bin", MOUNT_SYSTEM | MOUNT_AUTOMATIC | MOUNT_NOACL);
}
}
@@ -674,6 +664,7 @@ mount_info::conv_to_win32_path (const char *src_path, char *dst, device& dev,
/* See if this is a cygwin "device" */
if (win32_device_name (src_path, dst, dev))
{
+ debug_printf ("win32_device_name (%s)", src_path);
*flags = 0;
rc = 0;
goto out_no_chroot_check;
@@ -711,6 +702,7 @@ mount_info::conv_to_win32_path (const char *src_path, char *dst, device& dev,
}
if (isproc (src_path))
{
+ debug_printf ("isproc (%s)", src_path);
dev = *proc_dev;
dev = fhandler_proc::get_proc_fhandler (src_path);
if (dev == FH_NADA)
@@ -732,6 +724,7 @@ mount_info::conv_to_win32_path (const char *src_path, char *dst, device& dev,
off the prefix and transform it into an MS-DOS path. */
else if (iscygdrive (src_path))
{
+ debug_printf ("iscygdrive (%s) mount_table->cygdrive %s", src_path, mount_table->cygdrive);
int n = mount_table->cygdrive_len - 1;
int unit;
@@ -743,11 +736,15 @@ mount_info::conv_to_win32_path (const char *src_path, char *dst, device& dev,
}
else if (cygdrive_win32_path (src_path, dst, unit))
{
+ debug_printf ("cygdrive_win32_path (%s)", src_path);
*flags = cygdrive_flags;
goto out;
}
else if (mount_table->cygdrive_len > 1)
- return ENOENT;
+ {
+ debug_printf ("mount_table->cygdrive_len > 1 (%s)", src_path);
+ return ENOENT;
+ }
}
int chroot_pathlen;
@@ -758,7 +755,9 @@ mount_info::conv_to_win32_path (const char *src_path, char *dst, device& dev,
const char *path;
int len;
- mi = mount + posix_sorted[i];
+ mi = mount + shortest_native_sorted[i];
+ debug_printf (" mount[%d] .. checking %s -> %s ", i, mi->posix_path, mi->native_path);
+
if (!cygheap->root.exists ()
|| (mi->posix_pathlen == 1 && mi->posix_path[0] == '/'))
{
@@ -998,7 +997,8 @@ mount_info::conv_to_posix_path (const char *src_path, char *posix_path,
int pathbuflen = tail - pathbuf;
for (int i = 0; i < nmounts; ++i)
{
- mount_item &mi = mount[native_sorted[i]];
+ mount_item &mi = mount[longest_posix_sorted[i]];
+ debug_printf (" mount[%d] .. checking %s -> %s ", i, mi.posix_path, mi.native_path);
if (!path_prefix_p (mi.native_path, pathbuf, mi.native_pathlen,
mi.flags & MOUNT_NOPOSIX))
continue;
@@ -1211,8 +1211,17 @@ mount_info::from_fstab_line (char *line, bool user)
if (!*c)
return true;
cend = find_ws (c);
- *cend = '\0';
posix_path = conv_fstab_spaces (c);
+ if (!*cend)
+ {
+ unsigned mount_flags = MOUNT_SYSTEM | MOUNT_NOPOSIX | MOUNT_NOACL;
+
+ int res = mount_table->add_item (native_path, posix_path, mount_flags);
+ if (res && get_errno () == EMFILE)
+ return false;
+ return true;
+ }
+ *cend = '\0';
/* Third field: FS type. */
c = skip_ws (cend + 1);
if (!*c)
@@ -1441,16 +1450,145 @@ sort_by_native_name (const void *a, const void *b)
return res;
}
+/* sort_by_longest_posix_name: qsort callback to sort the mount entries.
+ Sort user mounts ahead of system mounts to the same POSIX path. */
+/* FIXME: should the user should be able to choose whether to
+ prefer user or system mounts??? */
+static int
+sort_by_longest_posix_name (const void *a, const void *b)
+{
+ mount_item *ap = mounts_for_sort + (*((int*) a));
+ mount_item *bp = mounts_for_sort + (*((int*) b));
+
+ /* Base weighting on the conversion that would give the longest
+ posix path. */
+ ssize_t alen = (ssize_t) strlen (ap->posix_path) - (ssize_t) strlen (ap->native_path);
+ ssize_t blen = (ssize_t) strlen (bp->posix_path) - (ssize_t) strlen (bp->native_path);
+
+ int res = blen - alen;
+
+ if (res)
+ return res; /* Path lengths differed */
+
+ /* The two paths were the same length, so just determine normal
+ lexical sorted order. */
+ res = strcmp (ap->posix_path, bp->posix_path);
+
+ if (res == 0)
+ {
+ /* need to select between user and system mount to same POSIX path */
+ if (!(bp->flags & MOUNT_SYSTEM)) /* user mount */
+ return 1;
+ else
+ return -1;
+ }
+
+ return res;
+}
+
+/* sort_by_shortest_native_name: qsort callback to sort the mount entries.
+ Sort user mounts ahead of system mounts to the same POSIX path. */
+/* FIXME: should the user should be able to choose whether to
+ prefer user or system mounts??? */
+static int
+sort_by_shortest_native_name (const void *a, const void *b)
+{
+ mount_item *ap = mounts_for_sort + (*((int*) a));
+ mount_item *bp = mounts_for_sort + (*((int*) b));
+
+ /* Base weighting on the conversion that would give the shortest
+ native path. */
+ ssize_t alen = (ssize_t) strlen (ap->native_path);
+ ssize_t blen = (ssize_t) strlen (bp->native_path);
+
+ int res = alen - blen;
+
+ if (res)
+ return res; /* Path lengths differed */
+
+ /* The two paths were the same length, so just determine normal
+ lexical sorted order. */
+ res = strcmp (ap->native_path, bp->native_path);
+
+ if (res == 0)
+ {
+ /* need to select between user and system mount to same POSIX path */
+ if (!(bp->flags & MOUNT_SYSTEM)) /* user mount */
+ return 1;
+ else
+ return -1;
+ }
+
+ return res;
+}
+
+static int
+sort_posix_subdirs_before_parents (const void *a, const void *b)
+{
+ mount_item *ap = mounts_for_sort + (*((int*) a));
+ mount_item *bp = mounts_for_sort + (*((int*) b));
+
+ if (ap->posix_pathlen > bp->posix_pathlen)
+ {
+ if (!memcmp (bp->posix_path, ap->posix_path, bp->posix_pathlen))
+ {
+ // bp is a subdir of ap (bp must be moved in-front)
+ return -1;
+ }
+ }
+ else if (ap->posix_pathlen < bp->posix_pathlen)
+ {
+ if (!memcmp (ap->posix_path, bp->posix_path, ap->posix_pathlen))
+ {
+ // ap is a subdir of bp (good as we are)
+ return 1;
+ }
+ }
+ return 0;
+}
+
+#define DISABLE_NEW_STUFF 0
+#define ONLY_USE_NEW_STUFF 1
+
void
mount_info::sort ()
{
for (int i = 0; i < nmounts; i++)
- native_sorted[i] = posix_sorted[i] = i;
+ native_sorted[i] = posix_sorted[i] = shortest_native_sorted[i] = longest_posix_sorted[i] = i;
/* Sort them into reverse length order, otherwise we won't
be able to look for /foo in /. */
mounts_for_sort = mount; /* ouch. */
qsort (posix_sorted, nmounts, sizeof (posix_sorted[0]), sort_by_posix_name);
qsort (native_sorted, nmounts, sizeof (native_sorted[0]), sort_by_native_name);
+ qsort (longest_posix_sorted, nmounts, sizeof (longest_posix_sorted[0]), sort_by_longest_posix_name);
+ qsort (shortest_native_sorted, nmounts, sizeof (shortest_native_sorted[0]), sort_by_shortest_native_name);
+ qsort (shortest_native_sorted, nmounts, sizeof (shortest_native_sorted[0]), sort_posix_subdirs_before_parents);
+ /* Disabling my new crap. */
+ #if DISABLE_NEW_STUFF
+ for (int i = 0; i < nmounts; i++)
+ {
+ longest_posix_sorted[i] = native_sorted[i];
+ shortest_native_sorted[i] = posix_sorted[i];
+ }
+ #else
+ #if ONLY_USE_NEW_STUFF
+ for (int i = 0; i < nmounts; i++)
+ {
+ native_sorted[i] = longest_posix_sorted[i];
+ posix_sorted[i] = shortest_native_sorted[i];
+ }
+ #endif
+ #endif
+ for (int i = 0; i < nmounts; i++)
+ {
+ mount_item *mi = mount + shortest_native_sorted[i];
+ debug_printf ("shortest_native_sorted (subdirs before parents)[%d] %12s %12s", i, mi->native_path, mi->posix_path);
+ }
+ for (int i = 0; i < nmounts; i++)
+ {
+ mount_item *mi = mount + longest_posix_sorted[i];
+ debug_printf ("longest_posix_sorted[%d] %12s %12s", i, mi->native_path, mi->posix_path);
+ }
}
/* Add an entry to the mount table.
@@ -1541,12 +1679,9 @@ mount_info::add_item (const char *native, const char *posix,
if (i == nmounts)
nmounts++;
- if (strcmp (posixtmp, "/usr/bin") == 0)
+ if (strcmp (posixtmp, "/bin") == 0)
got_usr_bin = true;
- if (strcmp (posixtmp, "/usr/lib") == 0)
- got_usr_lib = true;
-
if (posixtmp[0] == '/' && posixtmp[1] == '\0' && !(mountflags & MOUNT_CYGDRIVE))
root_idx = i;
diff --git a/winsup/cygwin/uinfo.cc b/winsup/cygwin/uinfo.cc
index 27dc289..12097de 100644
--- a/winsup/cygwin/uinfo.cc
+++ b/winsup/cygwin/uinfo.cc
@@ -2794,7 +2794,7 @@ pwdgrp::fetch_account_from_windows (fetch_user_arg_t &arg, cyg_ldap *pldap)
dom, name,
sid.string ((char *) sidstr),
home ?: "/home/", home ? L"" : name,
- shell ?: "/bin/bash");
+ shell ?: "/usr/bin/bash");
if (gecos)
free (gecos);
if (home)
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