Remove pre-2.2 Linux kernel support.

40 files changed, 319 insertions, 1433 deletions

diff --git a/ChangeLog b/ChangeLog
index 2c6a699ce9..371795616d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,127 @@
+2012-05-14  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #13717]
+	* sysdeps/unix/sysv/linux/configure.in (arch_minimum_kernel): Set
+	to 2.2.0 where earlier.
+	* sysdeps/unix/sysv/linux/configure: Regenerated.
+	* sysdeps/unix/sysv/linux/getcwd.c [!__ASSUME_GETCWD_SYSCALL]:
+	Remove conditional code.
+	[__ASSUME_GETCWD_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/i386/chown.c [!__ASSUME_LCHOWN_SYSCALL]:
+	Remove conditional code.
+	[!__NR_lchown]: Likewise.
+	[__ASSUME_LCHOWN_SYSCALL]: Make code unconditional.
+	[__NR_lchown]: Likewise.
+	* sysdeps/unix/sysv/linux/i386/fchownat.c (fchownat): Remove
+	comment referencing __ASSUME_LCHOWN_SYSCALL.
+	* sysdeps/unix/sysv/linux/i386/sigaction.c
+	[!__ASSUME_REALTIME_SIGNALS]: Remove conditional code.
+	[__ASSUME_REALTIME_SIGNALS]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/if_index.c [!__ASSUME_SIOCGIFNAME]:
+	Remove conditional code.
+	[__ASSUME_SIOCGIFNAME ]: Make code unconditional.
+	(__protocol_available): Remove #if 0 code.
+	* sysdeps/unix/sysv/linux/ifreq.c [!__ASSUME_SIOCGIFNAME]: Remove
+	conditional code.
+	[__ASSUME_SIOCGIFNAME]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/kernel-features.h
+	(__ASSUME_GETCWD_SYSCALL): Don't define.
+	(__ASSUME_REALTIME_SIGNALS): Likewise.
+	(__ASSUME_PREAD_SYSCALL): Likewise.
+	(__ASSUME_PWRITE_SYSCALL): Likewise.
+	(__ASSUME_POLL_SYSCALL): Likewise.
+	(__ASSUME_LCHOWN_SYSCALL): Likewise.
+	(__ASSUME_SETRESUID_SYSCALL): Define for all kernel versions for
+	non-SPARC.
+	(__ASSUME_SIOCGIFNAME): Don't define.
+	(__ASSUME_MSG_NOSIGNAL): Likewise.
+	(__ASSUME_SENDFILE): Define unconditionally.
+	(__ASSUME_PROC_SELF_FD_SYMLINK): Don't define.
+	* sysdeps/unix/sysv/linux/poll.c [!__ASSUME_POLL_SYSCALL]: Remove
+	conditional code.
+	[__ASSUME_POLL_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/chown.c (__chown)
+	[!__ASSUME_LCHOWN_SYSCALL]: Remove conditional code.
+	(__chown) [__ASSUME_LCHOWN_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/fchownat.c (fchownat)
+	[!__ASSUME_LCHOWN_SYSCALL]: Remove conditional code.
+	(fchownat) [__ASSUME_LCHOWN_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc32/pread.c
+	[!__ASSUME_PREAD_SYSCALL]: Remove conditional code.
+	[__ASSUME_PREAD_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc32/pread64.c
+	[!__ASSUME_PREAD_SYSCALL]: Remove conditional code.
+	[__ASSUME_PREAD_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite.c
+	[!__ASSUME_PWRITE_SYSCALL]: Remove conditional code.
+	[__ASSUME_PWRITE_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite64.c
+	[!__ASSUME_PWRITE_SYSCALL]: Remove conditional code.
+	[__ASSUME_PWRITE_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/pread.c
+	[!__ASSUME_PREAD_SYSCALL]: Remove conditional code.
+	[__ASSUME_PREAD_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/pread64.c
+	[!__ASSUME_PREAD_SYSCALL]: Remove conditional code.
+	[__ASSUME_PREAD_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite.c
+	[!__ASSUME_PWRITE_SYSCALL]: Remove conditional code.
+	[__ASSUME_PWRITE_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite64.c
+	[!__ASSUME_PWRITE_SYSCALL]: Remove conditional code.
+	[__ASSUME_PWRITE_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/pread.c [!__ASSUME_PREAD_SYSCALL]:
+	Remove conditional code.
+	[__ASSUME_PREAD_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/pread64.c [!__ASSUME_PREAD_SYSCALL]:
+	Remove conditional code.
+	[__ASSUME_PREAD_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/ptsname.c (__ptsname_internal)
+	[__LINUX_KERNEL_VERSION < 131443]: Remove conditional code.
+	* sysdeps/unix/sysv/linux/pwrite.c [!__ASSUME_PWRITE_SYSCALL]:
+	Remove conditional code.
+	[__ASSUME_PWRITE_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/pwrite64.c [!__ASSUME_PWRITE_SYSCALL]:
+	Remove conditional code.
+	[__ASSUME_PWRITE_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/sh/pread.c [!__ASSUME_PREAD_SYSCALL]:
+	Remove conditional code.
+	[__ASSUME_PREAD_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/sh/pread64.c [!__ASSUME_PREAD_SYSCALL]:
+	Remove conditional code.
+	[__ASSUME_PREAD_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/sh/pwrite.c [!__ASSUME_PWRITE_SYSCALL]:
+	Remove conditional code.
+	[__ASSUME_PWRITE_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/sh/pwrite64.c
+	[!__ASSUME_PWRITE_SYSCALL]: Remove conditional code.
+	[__ASSUME_PWRITE_SYSCALL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/sigaction.c
+	[!__ASSUME_REALTIME_SIGNALS]: Remove conditional code.
+	[__ASSUME_REALTIME_SIGNALS]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/sigpending.c
+	[!__ASSUME_REALTIME_SIGNALS]: Remove conditional code.
+	[__ASSUME_REALTIME_SIGNALS]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/sigprocmask.c
+	[!__ASSUME_REALTIME_SIGNALS]: Remove conditional code.
+	[__ASSUME_REALTIME_SIGNALS]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/sigsuspend.c
+	[!__ASSUME_REALTIME_SIGNALS]: Remove conditional code.
+	[__ASSUME_REALTIME_SIGNALS]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c
+	(__libc_missing_rt_sigs): Remove.
+	(__libc_sigaction) [__NR_rt_sigaction]: Make code unconditional.
+	(__libc_sigaction): Do not handle ENOSYS from rt_sigaction.
+	* sysdeps/unix/sysv/linux/syslog.c [!__ASSUME_MSG_NOSIGNAL]:
+	Remove conditional code.
+	[__ASSUME_MSG_NOSIGNAL]: Make code unconditional.
+	* sysdeps/unix/sysv/linux/testrtsig.h (kernel_has_rtsig): Always
+	return 1.
+	* sysdeps/unix/sysv/linux/ttyname.c (ttyname)
+	[!__ASSUME_PROC_SELF_FD_SYMLINK]: Remove conditional code.
+	* sysdeps/unix/sysv/linux/ttyname_r.c (__ttyname_r)
+	[!__ASSUME_PROC_SELF_FD_SYMLINK]: Likewise.
+
 2012-05-14  Andreas Jaeger  <aj@suse.de>
 
 	* manual/string.texi (Copying and Concatenation): Add missing
diff --git a/NEWS b/NEWS
index 4e75d4935a..5e48976ad3 100644
--- a/NEWS
+++ b/NEWS
@@ -63,6 +63,10 @@ Version 2.16
   version 2.14.  This option will be removed at some time in the future
   after the TI-RPC library becomes fully sufficient for the needs of
   existing applications.
+
+* Compatibility code for Linux kernel versions before 2.2 has been removed.
+  Note that glibc is not expected to work with any Linux kernel version
+  before 2.6.
 
 Version 2.15
 
diff --git a/sysdeps/unix/sysv/linux/configure b/sysdeps/unix/sysv/linux/configure
index d571d0b62b..8235068a18 100644
--- a/sysdeps/unix/sysv/linux/configure
+++ b/sysdeps/unix/sysv/linux/configure
@@ -284,11 +284,11 @@ test -n "$arch_minimum_kernel" ||
 case "$machine" in
   i386*)
     libc_cv_gcc_unwind_find_fde=yes
-    arch_minimum_kernel=2.0.10
+    arch_minimum_kernel=2.2.0
     ;;
   powerpc/powerpc32)
     libc_cv_gcc_unwind_find_fde=yes
-    arch_minimum_kernel=2.0.10
+    arch_minimum_kernel=2.2.0
     ;;
   powerpc/powerpc64)
     arch_minimum_kernel=2.4.21
@@ -311,13 +311,13 @@ case "$machine" in
     ;;
   sparc*)
     libc_cv_gcc_unwind_find_fde=yes
-    arch_minimum_kernel=2.0.10
+    arch_minimum_kernel=2.2.0
     ;;
   x86_64*)
     arch_minimum_kernel=2.4.0
     ;;
   *)
-    arch_minimum_kernel=2.0.10
+    arch_minimum_kernel=2.2.0
     ;;
 esac
 if test -n "$minimum_kernel"; then
@@ -331,7 +331,7 @@ $as_echo "$as_me: WARNING: minimum kernel version reset to $arch_minimum_kernel"
     minimum_kernel=$arch_minimum_kernel
   fi
 else
-  if test $arch_minimum_kernel != '2.0.10'; then
+  if test $arch_minimum_kernel != '2.2.0'; then
     minimum_kernel=$arch_minimum_kernel
   fi
 fi
diff --git a/sysdeps/unix/sysv/linux/configure.in b/sysdeps/unix/sysv/linux/configure.in
index 916d64a605..1ce14f294f 100644
--- a/sysdeps/unix/sysv/linux/configure.in
+++ b/sysdeps/unix/sysv/linux/configure.in
@@ -41,11 +41,11 @@ test -n "$arch_minimum_kernel" ||
 case "$machine" in
   i386*)
     libc_cv_gcc_unwind_find_fde=yes
-    arch_minimum_kernel=2.0.10
+    arch_minimum_kernel=2.2.0
     ;;
   powerpc/powerpc32)
     libc_cv_gcc_unwind_find_fde=yes
-    arch_minimum_kernel=2.0.10
+    arch_minimum_kernel=2.2.0
     ;;
   powerpc/powerpc64)
     arch_minimum_kernel=2.4.21
@@ -68,13 +68,13 @@ case "$machine" in
     ;;
   sparc*)
     libc_cv_gcc_unwind_find_fde=yes
-    arch_minimum_kernel=2.0.10
+    arch_minimum_kernel=2.2.0
     ;;
   x86_64*)
     arch_minimum_kernel=2.4.0
     ;;
   *)
-    arch_minimum_kernel=2.0.10
+    arch_minimum_kernel=2.2.0
     ;;
 esac
 if test -n "$minimum_kernel"; then
@@ -87,7 +87,7 @@ if test -n "$minimum_kernel"; then
     minimum_kernel=$arch_minimum_kernel
   fi
 else
-  if test $arch_minimum_kernel != '2.0.10'; then
+  if test $arch_minimum_kernel != '2.2.0'; then
     minimum_kernel=$arch_minimum_kernel
   fi
 fi
diff --git a/sysdeps/unix/sysv/linux/getcwd.c b/sysdeps/unix/sysv/linux/getcwd.c
index 6e3c5e0644..8f884808c3 100644
--- a/sysdeps/unix/sysv/linux/getcwd.c
+++ b/sysdeps/unix/sysv/linux/getcwd.c
@@ -38,27 +38,6 @@
 #endif
 
 
-#if __ASSUME_GETCWD_SYSCALL > 0
-/* Kernel 2.1.92 introduced a third way to get the current working
-   directory: a syscall.  We've got to be careful that even when
-   compiling under 2.1.92+ the libc still runs under older kernels. */
-# define no_syscall_getcwd 0
-# define have_new_dcache 1
-#else
-# if __NR_getcwd
-/* Kernel 2.1.92 introduced a third way to get the current working
-   directory: a syscall.  We've got to be careful that even when
-   compiling under 2.1.92+ the libc still runs under older kernels.
-   An additional problem is that the system call does not return
-   the path of directories longer than one page.  */
-static int no_syscall_getcwd;
-static int have_new_dcache;
-# else
-#  define no_syscall_getcwd 1
-static int have_new_dcache = 1;
-# endif
-#endif
-
 /* The "proc" filesystem provides an easy method to retrieve the value.
    For each process, the corresponding directory contains a symbolic link
    named `cwd'.  Reading the content of this link immediate gives us the
@@ -73,9 +52,6 @@ __getcwd (char *buf, size_t size)
   int n;
   char *result;
 
-  if (no_syscall_getcwd && !have_new_dcache)
-    return generic_getcwd (buf, size);
-
 #ifndef NO_ALLOCATION
   size_t alloc_size = size;
   if (size == 0)
@@ -101,138 +77,59 @@ __getcwd (char *buf, size_t size)
 #endif
     path = buf;
 
-#if defined __NR_getcwd || __LINUX_GETCWD_SYSCALL > 0
-  if (!no_syscall_getcwd)
-    {
-      int retval;
-
-      retval = INLINE_SYSCALL (getcwd, 2, CHECK_STRING (path), alloc_size);
-      if (retval >= 0)
-	{
-# ifndef NO_ALLOCATION
-	  if (buf == NULL && size == 0)
-	    /* Ensure that the buffer is only as large as necessary.  */
-	    buf = realloc (path, (size_t) retval);
-
-	  if (buf == NULL)
-	    /* Either buf was NULL all along, or `realloc' failed but
-	       we still have the original string.  */
-	    buf = path;
-# endif
-
-	  return buf;
-	}
-
-      /* The system call cannot handle paths longer than a page.
-	 Neither can the magic symlink in /proc/self.  Just use the
-	 generic implementation right away.  */
-      if (errno == ENAMETOOLONG)
-	{
-# ifndef NO_ALLOCATION
-	  if (buf == NULL && size == 0)
-	    {
-	      free (path);
-	      path = NULL;
-	    }
-# endif
-
-	  result = generic_getcwd (path, size);
-
-# ifndef NO_ALLOCATION
-	  if (result == NULL && buf == NULL && size != 0)
-	    free (path);
-# endif
-
-	  return result;
-	}
+  int retval;
 
-# if __ASSUME_GETCWD_SYSCALL
-      /* It should never happen that the `getcwd' syscall failed because
-	 the buffer is too small if we allocated the buffer ourselves
-	 large enough.  */
-      assert (errno != ERANGE || buf != NULL || size != 0);
+  retval = INLINE_SYSCALL (getcwd, 2, CHECK_STRING (path), alloc_size);
+  if (retval >= 0)
+    {
+#ifndef NO_ALLOCATION
+      if (buf == NULL && size == 0)
+	/* Ensure that the buffer is only as large as necessary.  */
+	buf = realloc (path, (size_t) retval);
 
-#  ifndef NO_ALLOCATION
       if (buf == NULL)
-	free (path);
-#  endif
+	/* Either buf was NULL all along, or `realloc' failed but
+	   we still have the original string.  */
+	buf = path;
+#endif
 
-      return NULL;
-# else
-      if (errno == ENOSYS)
-	{
-	   no_syscall_getcwd = 1;
-	   have_new_dcache = 1;	/* Now we will try the /proc method.  */
-	}
-      else if (errno != ERANGE || buf != NULL)
-	{
-#  ifndef NO_ALLOCATION
-	  if (buf == NULL)
-	    free (path);
-#  endif
-	  return NULL;
-	}
-# endif
+      return buf;
     }
-#endif
 
-  n = __readlink ("/proc/self/cwd", path, alloc_size - 1);
-  if (n != -1)
+  /* The system call cannot handle paths longer than a page.
+     Neither can the magic symlink in /proc/self.  Just use the
+     generic implementation right away.  */
+  if (errno == ENAMETOOLONG)
     {
-      if (path[0] == '/')
-	{
-	  if ((size_t) n >= alloc_size - 1)
-	    {
 #ifndef NO_ALLOCATION
-	      if (buf == NULL)
-