winsup/cygwin/wincap.cc

   1 /* wincap.cc -- figure out on which OS we're running. Set the
   2                 capability class to the appropriate values.
   3
   4 This file is part of Cygwin.
   5
   6 This software is a copyrighted work licensed under the terms of the
   7 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   8 details. */
   9
  10 #include "winsup.h"
  11 #include "miscfuncs.h"
  12 #include "security.h"
  13 #include "ntdll.h"
  14 #include "memory_layout.h"
  15
  16 static const wincaps wincap_8_1 = {
  17   {
  18     has_new_pebteb_region:false,
  19     has_unprivileged_createsymlink:false,
  20     has_precise_interrupt_time:false,
  21     has_posix_unlink_semantics:false,
  22     has_posix_unlink_semantics_with_ignore_readonly:false,
  23     has_case_sensitive_dirs:false,
  24     has_posix_rename_semantics:false,
  25     has_con_24bit_colors:false,
  26     has_con_broken_csi3j:false,
  27     has_con_broken_il_dl:false,
  28     has_con_esc_rep:false,
  29     has_extended_mem_api:false,
  30     has_tcp_fastopen:false,
  31     has_linux_tcp_keepalive_sockopts:false,
  32     has_tcp_maxrtms:false,
  33     has_con_broken_tabs:false,
  34     has_user_shstk:false,
  35   },
  36 };
  37
  38 static const wincaps  wincap_10_1507 = {
  39   {
  40     has_new_pebteb_region:false,
  41     has_unprivileged_createsymlink:false,
  42     has_precise_interrupt_time:true,
  43     has_posix_unlink_semantics:false,
  44     has_posix_unlink_semantics_with_ignore_readonly:false,
  45     has_case_sensitive_dirs:false,
  46     has_posix_rename_semantics:false,
  47     has_con_24bit_colors:false,
  48     has_con_broken_csi3j:false,
  49     has_con_broken_il_dl:false,
  50     has_con_esc_rep:false,
  51     has_extended_mem_api:false,
  52     has_tcp_fastopen:false,
  53     has_linux_tcp_keepalive_sockopts:false,
  54     has_tcp_maxrtms:false,
  55     has_con_broken_tabs:false,
  56     has_user_shstk:false,
  57   },
  58 };
  59
  60 static const wincaps  wincap_10_1607 = {
  61   {
  62     has_new_pebteb_region:false,
  63     has_unprivileged_createsymlink:false,
  64     has_precise_interrupt_time:true,
  65     has_posix_unlink_semantics:false,
  66     has_posix_unlink_semantics_with_ignore_readonly:false,
  67     has_case_sensitive_dirs:false,
  68     has_posix_rename_semantics:false,
  69     has_con_24bit_colors:false,
  70     has_con_broken_csi3j:false,
  71     has_con_broken_il_dl:false,
  72     has_con_esc_rep:false,
  73     has_extended_mem_api:false,
  74     has_tcp_fastopen:true,
  75     has_linux_tcp_keepalive_sockopts:false,
  76     has_tcp_maxrtms:true,
  77     has_con_broken_tabs:false,
  78     has_user_shstk:false,
  79   },
  80 };
  81
  82 static const wincaps wincap_10_1703 = {
  83   {
  84     has_new_pebteb_region:true,
  85     has_unprivileged_createsymlink:true,
  86     has_precise_interrupt_time:true,
  87     has_posix_unlink_semantics:false,
  88     has_posix_unlink_semantics_with_ignore_readonly:false,
  89     has_case_sensitive_dirs:false,
  90     has_posix_rename_semantics:false,
  91     has_con_24bit_colors:true,
  92     has_con_broken_csi3j:false,
  93     has_con_broken_il_dl:false,
  94     has_con_esc_rep:false,
  95     has_extended_mem_api:false,
  96     has_tcp_fastopen:true,
  97     has_linux_tcp_keepalive_sockopts:false,
  98     has_tcp_maxrtms:true,
  99     has_con_broken_tabs:true,
 100     has_user_shstk:false,
 101   },
 102 };
 103
 104 static const wincaps wincap_10_1709 = {
 105   {
 106     has_new_pebteb_region:true,
 107     has_unprivileged_createsymlink:true,
 108     has_precise_interrupt_time:true,
 109     has_posix_unlink_semantics:true,
 110     has_posix_unlink_semantics_with_ignore_readonly:false,
 111     has_case_sensitive_dirs:false,
 112     has_posix_rename_semantics:false,
 113     has_con_24bit_colors:true,
 114     has_con_broken_csi3j:false,
 115     has_con_broken_il_dl:false,
 116     has_con_esc_rep:false,
 117     has_extended_mem_api:false,
 118     has_tcp_fastopen:true,
 119     has_linux_tcp_keepalive_sockopts:true,
 120     has_tcp_maxrtms:true,
 121     has_con_broken_tabs:true,
 122     has_user_shstk:false,
 123   },
 124 };
 125
 126 static const wincaps wincap_10_1803 = {
 127   {
 128     has_new_pebteb_region:true,
 129     has_unprivileged_createsymlink:true,
 130     has_precise_interrupt_time:true,
 131     has_posix_unlink_semantics:true,
 132     has_posix_unlink_semantics_with_ignore_readonly:false,
 133     has_case_sensitive_dirs:true,
 134     has_posix_rename_semantics:false,
 135     has_con_24bit_colors:true,
 136     has_con_broken_csi3j:false,
 137     has_con_broken_il_dl:false,
 138     has_con_esc_rep:false,
 139     has_extended_mem_api:true,
 140     has_tcp_fastopen:true,
 141     has_linux_tcp_keepalive_sockopts:true,
 142     has_tcp_maxrtms:true,
 143     has_con_broken_tabs:true,
 144     has_user_shstk:false,
 145   },
 146 };
 147
 148 static const wincaps wincap_10_1809 = {
 149   {
 150     has_new_pebteb_region:true,
 151     has_unprivileged_createsymlink:true,
 152     has_precise_interrupt_time:true,
 153     has_posix_unlink_semantics:true,
 154     has_posix_unlink_semantics_with_ignore_readonly:true,
 155     has_case_sensitive_dirs:true,
 156     has_posix_rename_semantics:true,
 157     has_con_24bit_colors:true,
 158     has_con_broken_csi3j:true,
 159     has_con_broken_il_dl:false,
 160     has_con_esc_rep:false,
 161     has_extended_mem_api:true,
 162     has_tcp_fastopen:true,
 163     has_linux_tcp_keepalive_sockopts:true,
 164     has_tcp_maxrtms:true,
 165     has_con_broken_tabs:true,
 166     has_user_shstk:false,
 167   },
 168 };
 169
 170 static const wincaps wincap_10_1903 = {
 171   {
 172     has_new_pebteb_region:true,
 173     has_unprivileged_createsymlink:true,
 174     has_precise_interrupt_time:true,
 175     has_posix_unlink_semantics:true,
 176     has_posix_unlink_semantics_with_ignore_readonly:true,
 177     has_case_sensitive_dirs:true,
 178     has_posix_rename_semantics:true,
 179     has_con_24bit_colors:true,
 180     has_con_broken_csi3j:false,
 181     has_con_broken_il_dl:true,
 182     has_con_esc_rep:true,
 183     has_extended_mem_api:true,
 184     has_tcp_fastopen:true,
 185     has_linux_tcp_keepalive_sockopts:true,
 186     has_tcp_maxrtms:true,
 187     has_con_broken_tabs:true,
 188     has_user_shstk:false,
 189   },
 190 };
 191
 192 static const wincaps wincap_10_2004 = {
 193   {
 194     has_new_pebteb_region:true,
 195     has_unprivileged_createsymlink:true,
 196     has_precise_interrupt_time:true,
 197     has_posix_unlink_semantics:true,
 198     has_posix_unlink_semantics_with_ignore_readonly:true,
 199     has_case_sensitive_dirs:true,
 200     has_posix_rename_semantics:true,
 201     has_con_24bit_colors:true,
 202     has_con_broken_csi3j:false,
 203     has_con_broken_il_dl:false,
 204     has_con_esc_rep:true,
 205     has_extended_mem_api:true,
 206     has_tcp_fastopen:true,
 207     has_linux_tcp_keepalive_sockopts:true,
 208     has_tcp_maxrtms:true,
 209     has_con_broken_tabs:true,
 210     has_user_shstk:true,
 211   },
 212 };
 213
 214 static const wincaps wincap_11 = {
 215   {
 216     has_new_pebteb_region:true,
 217     has_unprivileged_createsymlink:true,
 218     has_precise_interrupt_time:true,
 219     has_posix_unlink_semantics:true,
 220     has_posix_unlink_semantics_with_ignore_readonly:true,
 221     has_case_sensitive_dirs:true,
 222     has_posix_rename_semantics:true,
 223     has_con_24bit_colors:true,
 224     has_con_broken_csi3j:false,
 225     has_con_broken_il_dl:false,
 226     has_con_esc_rep:true,
 227     has_extended_mem_api:true,
 228     has_tcp_fastopen:true,
 229     has_linux_tcp_keepalive_sockopts:true,
 230     has_tcp_maxrtms:true,
 231     has_con_broken_tabs:false,
 232     has_user_shstk:true,
 233   },
 234 };
 235
 236 wincapc wincap __attribute__((section (".cygwin_dll_common"), shared));
 237
 238 void
 239 wincapc::init ()
 240 {
 241   if (caps)
 242     return;             // already initialized
 243
 244   GetSystemInfo (&system_info);
 245   version.dwOSVersionInfoSize = sizeof (RTL_OSVERSIONINFOEXW);
 246   RtlGetVersion (&version);
 247   /* Overwrite unreliable kernel version with correct values returned by
 248      RtlGetNtVersionNumbers.  See git log of this change for a description. */
 249   RtlGetNtVersionNumbers (&version.dwMajorVersion,
 250                           &version.dwMinorVersion,
 251                           &version.dwBuildNumber);
 252   version.dwBuildNumber &= 0xffff;
 253
 254   switch (version.dwMajorVersion)
 255     {
 256       case 6:
 257         caps = &wincap_8_1;
 258         break;
 259       case 10:
 260       default:
 261         if (likely (version.dwBuildNumber >= 22000))
 262           caps = &wincap_11;
 263         else if (version.dwBuildNumber >= 19041)
 264           caps = &wincap_10_2004;
 265         else if (version.dwBuildNumber >= 18362)
 266           caps = &wincap_10_1903;
 267         else if (version.dwBuildNumber >= 17763)
 268           caps = &wincap_10_1809;
 269         else if (version.dwBuildNumber >= 17134)
 270           caps = &wincap_10_1803;
 271         else if (version.dwBuildNumber >= 16299)
 272           caps = &wincap_10_1709;
 273         else if (version.dwBuildNumber >= 15063)
 274           caps = &wincap_10_1703;
 275         else if (version.dwBuildNumber >= 14393)
 276           caps = &wincap_10_1607;
 277         else
 278           caps = & wincap_10_1507;
 279     }
 280
 281   _is_server = (version.wProductType != VER_NT_WORKSTATION);
 282
 283   __small_sprintf (osnam, "NT-%d.%d", version.dwMajorVersion,
 284                    version.dwMinorVersion);
 285 }