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Update.
1999-05-26 Ulrich Drepper <drepper@cygnus.com> * config.h.in: Add __LINUX_KERNEL_VERSION. * configure.in: Recognize --enable-kernel. * sysdeps/unix/sysv/linux/configure.in: Check for correct kernel headers if --enable-kernel is given and set __LINUX_KERNEL_VERSION appropriately. * sysdeps/unix/sysv/linux/init-first.c: If minimal kernel version is given perform runtime test. * sysdeps/unix/sysv/linux/kernel-features.h: New file. * sysdeps/unix/sysv/linux/getcwd.c: Elide compatibility code if minimal supported kernel is known to have the feature. * sysdeps/unix/sysv/linux/poll.c: Likewise. * sysdeps/unix/sysv/linux/pread.c: Likewise. * sysdeps/unix/sysv/linux/pread64.c: Likewise. * sysdeps/unix/sysv/linux/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/seteuid.c: Likewise. * sysdeps/unix/sysv/linux/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/sigprocmask.c: Likewise. * sysdeps/unix/sysv/linux/sigsuspend.c: Likewise. * sysdeps/unix/sysv/linux/testrtsig.h: Likewise. * sysdeps/unix/sysv/linux/i386/chown.c: Likewise. * sysdeps/unix/sysv/linux/i386/pread.c: Likewise. * sysdeps/unix/sysv/linux/i386/pread64.c: Likewise. * sysdeps/unix/sysv/linux/i386/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/i386/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/sysctl.c: Add __sysctl alias.
This commit is contained in:
Ulrich Drepper
parent
475e390e80
commit
958f238f36
31
ChangeLog
31
ChangeLog
@ -1,3 +1,34 @@
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1999-05-26 Ulrich Drepper <drepper@cygnus.com>
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* config.h.in: Add __LINUX_KERNEL_VERSION.
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* configure.in: Recognize --enable-kernel.
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* sysdeps/unix/sysv/linux/configure.in: Check for correct kernel
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headers if --enable-kernel is given and set __LINUX_KERNEL_VERSION
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appropriately.
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* sysdeps/unix/sysv/linux/init-first.c: If minimal kernel version is
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given perform runtime test.
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* sysdeps/unix/sysv/linux/kernel-features.h: New file.
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* sysdeps/unix/sysv/linux/getcwd.c: Elide compatibility code if
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minimal supported kernel is known to have the feature.
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* sysdeps/unix/sysv/linux/poll.c: Likewise.
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* sysdeps/unix/sysv/linux/pread.c: Likewise.
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* sysdeps/unix/sysv/linux/pread64.c: Likewise.
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* sysdeps/unix/sysv/linux/pwrite.c: Likewise.
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* sysdeps/unix/sysv/linux/pwrite64.c: Likewise.
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* sysdeps/unix/sysv/linux/seteuid.c: Likewise.
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* sysdeps/unix/sysv/linux/sigaction.c: Likewise.
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* sysdeps/unix/sysv/linux/sigprocmask.c: Likewise.
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* sysdeps/unix/sysv/linux/sigsuspend.c: Likewise.
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* sysdeps/unix/sysv/linux/testrtsig.h: Likewise.
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* sysdeps/unix/sysv/linux/i386/chown.c: Likewise.
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* sysdeps/unix/sysv/linux/i386/pread.c: Likewise.
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* sysdeps/unix/sysv/linux/i386/pread64.c: Likewise.
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* sysdeps/unix/sysv/linux/i386/pwrite.c: Likewise.
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* sysdeps/unix/sysv/linux/i386/pwrite64.c: Likewise.
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* sysdeps/unix/sysv/linux/sysctl.c: Add __sysctl alias.
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1999-05-25 Ulrich Drepper <drepper@cygnus.com>
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* sysdeps/posix/getcwd.c (__getcwd): Fix potential memory leaks.
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@ -77,6 +77,9 @@
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# define internal_function __attribute__ ((regparm (3), stdcall))
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#endif
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/* Linux specific: minimum supported kernel version. */
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#undef __LINUX_KERNEL_VERSION
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/*
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*/
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@ -133,6 +133,13 @@ AC_ARG_ENABLE(force-install,
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force_install=$enableval, force_install=yes)
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AC_SUBST(force_install)
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dnl On some platforms we allow dropping compatibility with all kernel
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dnl versions.
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AC_ARG_ENABLE(kernel,
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[ --enable-kernel=VERSION compile for copmatibility with kernel not older
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than VERSION],
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minimum_kernel=$enableval)
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AC_CANONICAL_HOST
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# The way shlib-versions is used to generate soversions.mk uses a
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33
sysdeps/unix/sysv/linux/configure
vendored
33
sysdeps/unix/sysv/linux/configure
vendored
@ -13,7 +13,7 @@ if test -n "$sysheaders"; then
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fi
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echo $ac_n "checking installed Linux kernel header files""... $ac_c" 1>&6
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echo "configure:16: checking installed Linux kernel header files" >&5
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if eval "test \"`echo '$''{'libc_cv_linux2010'+set}'`\" = set"; then
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if eval "test \"\${libc_cv_linux2010+set}\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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cat > conftest.$ac_ext <<EOF
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@ -49,6 +49,35 @@ make sure that file was built correctly when installing the kernel header
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files. To use kernel headers not from /usr/include/linux, use the
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configure option --with-headers." 1>&2; exit 1; }
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fi
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# If the user gave a minimal version number test whether the available
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# kernel headers are young enough.
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if test -n "$minimum_kernel"; then
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echo $ac_n "checking for kernel header at least $minimum_kernel""... $ac_c" 1>&6
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echo "configure:58: checking for kernel header at least $minimum_kernel" >&5
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decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\(\([0-9]*\)\|\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
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cat > conftest.$ac_ext <<EOF
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#include <linux/version.h>
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int main() {
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#if LINUX_VERSION_CODE < $decnum
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eat flaming death
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#endif
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; return 0; }
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EOF
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if { (eval echo configure:30: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
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cat >> confdefs.h <<EOF
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#define __LINUX_KERNEL_VERSION $decnum
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EOF
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echo "$ac_t""ok" 1>&6
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else
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echo "$ac_t""too old!" 1>&6
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{ echo "configure: error: *** The available kernel headers are not at least as old as the requested
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*** compatible kernel version" 1>&2; exit 1; }
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fi
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rm -f conftest*
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fi
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if test -n "$sysheaders"; then
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CFLAGS=$OLD_CFLAGS
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fi
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@ -135,7 +164,7 @@ if test $host = $build; then
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ac_prefix=$ac_default_prefix
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fi
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echo $ac_n "checking for symlinks in ${ac_prefix}/include""... $ac_c" 1>&6
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echo "configure:131: checking for symlinks in ${ac_prefix}/include" >&5
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echo "configure:168: checking for symlinks in ${ac_prefix}/include" >&5
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ac_message=
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if test -L ${ac_prefix}/include/net; then
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ac_message="$ac_message
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@ -34,6 +34,33 @@ make sure that file was built correctly when installing the kernel header
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files. To use kernel headers not from /usr/include/linux, use the
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configure option --with-headers.])
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fi
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# If the user gave a minimal version number test whether the available
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# kernel headers are young enough.
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if test -n "$minimum_kernel"; then
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AC_MSG_CHECKING(for kernel header at least $minimum_kernel)
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changequote(,)dnl
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decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\(\([0-9]*\)\|\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
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changequote([,])dnl
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cat > conftest.$ac_ext <<EOF
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#include <linux/version.h>
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int main() {
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#if LINUX_VERSION_CODE < $decnum
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eat flaming death
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#endif
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; return 0; }
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EOF
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if { (eval echo configure:30: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
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AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum)
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AC_MSG_RESULT(ok)
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else
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AC_MSG_RESULT(too old!)
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AC_MSG_ERROR([*** The available kernel headers are not at least as old as the requested
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*** compatible kernel version])
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fi
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rm -f conftest*
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fi
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if test -n "$sysheaders"; then
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CFLAGS=$OLD_CFLAGS
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fi
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@ -18,6 +18,7 @@
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdlib.h>
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@ -26,7 +27,19 @@
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#include <sysdep.h>
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#include <sys/syscall.h>
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#include "kernel-features.h"
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#if __ASSUME_GETCWD_SYSCALL > 0
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/* Kernel 2.1.92 introduced a third way to get the current working
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directory: a syscall. We've got to be careful that even when
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compiling under 2.1.92+ the libc still runs under older kernels. */
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extern int __syscall_getcwd (char *buf, unsigned long size);
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# define no_syscall_getcwd 0
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# define have_new_dcache 1
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/* This is a trick since we don't define generic_getcwd. */
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# define generic_getcwd getcwd
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#else
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/* The "proc" filesystem provides an easy method to retrieve the value.
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For each process, the corresponding directory contains a symbolic link
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named `cwd'. Reading the content of this link immediate gives us the
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@ -34,16 +47,17 @@
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the proc filesystem mounted. Use the POSIX implementation in this case. */
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static char *generic_getcwd (char *buf, size_t size) internal_function;
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#ifdef __NR_getcwd
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# if __NR_getcwd
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/* Kernel 2.1.92 introduced a third way to get the current working
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directory: a syscall. We've got to be careful that even when
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compiling under 2.1.92+ the libc still runs under older kernels. */
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extern int __syscall_getcwd (char *buf, unsigned long size);
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static int no_syscall_getcwd;
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static int have_new_dcache;
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#else
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# define no_syscall_getcwd 1
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# else
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# define no_syscall_getcwd 1
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static int have_new_dcache = 1;
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# endif
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#endif
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char *
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@ -80,7 +94,7 @@ __getcwd (char *buf, size_t size)
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save_errno = errno;
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#ifdef __NR_getcwd
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#if defined __NR_getcwd || __LINUX_GETCWD_SYSCALL > 0
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if (!no_syscall_getcwd)
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{
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int retval;
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@ -98,6 +112,16 @@ __getcwd (char *buf, size_t size)
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return buf;
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}
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# if __ASSUME_GETCWD_SYSCALL
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/* It should never happen that the `getcwd' syscall failed because
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the buffer is too small if we allocated the buffer outself. */
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assert (errno != ERANGE || buf != NULL);
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if (buf == NULL)
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free (path);
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return NULL;
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# else
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if (errno == ENOSYS)
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{
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no_syscall_getcwd = 1;
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@ -111,6 +135,7 @@ __getcwd (char *buf, size_t size)
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}
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__set_errno (save_errno);
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# endif
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}
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#endif
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@ -136,14 +161,18 @@ __getcwd (char *buf, size_t size)
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}
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return buf;
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}
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#ifndef have_new_dcache
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else
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have_new_dcache = 0;
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#endif
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}
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#if __ASSUME_GETCWD_SYSCALL == 0
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/* Set to have_new_dcache only if error indicates that proc doesn't
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exist. */
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if (errno != EACCES && errno != ENAMETOOLONG)
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have_new_dcache = 0;
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#endif
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/* Something went wrong. Restore the error number and use the generic
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version. */
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@ -165,7 +194,9 @@ __getcwd (char *buf, size_t size)
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}
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weak_alias (__getcwd, getcwd)
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#if __ASSUME_GETCWD_SYSCALL == 0
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/* Get the code for the generic version. */
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#define GETCWD_RETURN_TYPE static char * internal_function
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#define __getcwd generic_getcwd
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#include <sysdeps/posix/getcwd.c>
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# define GETCWD_RETURN_TYPE static char * internal_function
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# define __getcwd generic_getcwd
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# include <sysdeps/posix/getcwd.c>
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#endif
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@ -1,4 +1,4 @@
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/* Copyright (C) 1998 Free Software Foundation, Inc.
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/* Copyright (C) 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -22,6 +22,8 @@
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#include <sysdep.h>
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#include <sys/syscall.h>
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#include <kernel-features.h>
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/*
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In Linux 2.1.x the chown functions have been changed. A new function lchown
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was introduced. The new chown now follows symlinks - the old chown and the
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@ -34,14 +36,15 @@
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extern int __syscall_chown (const char *__file,
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uid_t __owner, gid_t __group);
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#ifdef __NR_lchown
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#if defined __NR_lchown || __ASSUME_LCHOWN_SYSCALL > 0
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/* Running under Linux > 2.1.80. */
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static int __libc_old_chown;
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int
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__real_chown (const char *file, uid_t owner, gid_t group)
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{
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# if __ASSUME_LCHOWN_SYSCALL == 0
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static int __libc_old_chown;
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int result;
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if (!__libc_old_chown)
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@ -57,11 +60,14 @@ __real_chown (const char *file, uid_t owner, gid_t group)
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}
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return __lchown (file, owner, group);
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# else
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return INLINE_SYSCALL (chown, 3, file, owner, group);
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# endif
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}
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#endif
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#ifndef __NR_lchown
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#if !defined __NR_lchown && __ASSUME_LCHOWN_SYSCALL == 0
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/* Compiling under older kernels. */
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int
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__chown_is_lchown (const char *file, uid_t owner, gid_t group)
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@ -1,4 +1,4 @@
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/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
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/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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@ -23,10 +23,14 @@
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#include <sysdep.h>
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#include <sys/syscall.h>
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#ifdef __NR_pread
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#include <kernel-features.h>
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#if defined __NR_pread || __ASSUME_PREAD_SYSCALL > 0
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# if __ASSUME_PREAD_SYSCALL == 0
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static ssize_t __emulate_pread (int fd, void *buf, size_t count,
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off_t offset) internal_function;
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# endif
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ssize_t
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@ -40,16 +44,21 @@ __pread (fd, buf, count, offset)
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|
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/* First try the syscall. */
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result = INLINE_SYSCALL (pread, 5, fd, buf, count, offset, 0);
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# if __ASSUME_PREAD_SYSCALL == 0
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if (result == -1 && errno == ENOSYS)
|
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/* No system call available. Use the emulation. */
|
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result = __emulate_pread (fd, buf, count, offset);
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# endif
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return result;
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}
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|
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weak_alias (__pread, pread)
|
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|
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#define __pread(fd, buf, count, offset) \
|
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# define __pread(fd, buf, count, offset) \
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static internal_function __emulate_pread (fd, buf, count, offset)
|
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#endif
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#include <sysdeps/posix/pread.c>
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|
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#if __ASSUME_PREAD_SYSCALL == 0
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# include <sysdeps/posix/pread.c>
|
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#endif
|
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|
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@ -1,4 +1,4 @@
|
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/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
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/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
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This file is part of the GNU C Library.
|
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
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|
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@ -23,13 +23,14 @@
|
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#include <sysdep.h>
|
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#include <sys/syscall.h>
|
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|
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#ifdef __NR_pread
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#include <kernel-features.h>
|
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|
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extern ssize_t __syscall_pread64 (int fd, void *buf, size_t count,
|
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off_t offset_hi, off_t offset_lo);
|
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#if defined __NR_pread || __ASSUME_PREAD_SYSCALL > 0
|
||||
|
||||
# if __ASSUME_PREAD_SYSCALL == 0
|
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static ssize_t __emulate_pread64 (int fd, void *buf, size_t count,
|
||||
off64_t offset) internal_function;
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# endif
|
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|
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|
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ssize_t
|
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@ -45,16 +46,21 @@ __pread64 (fd, buf, count, offset)
|
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result = INLINE_SYSCALL (pread, 5, fd, buf, count,
|
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(off_t) (offset & 0xffffffff),
|
||||
(off_t) (offset >> 32));
|
||||
# if __ASSUME_PREAD_SYSCALL == 0
|
||||
if (result == -1 && errno == ENOSYS)
|
||||
/* No system call available. Use the emulation. */
|
||||
result = __emulate_pread64 (fd, buf, count, offset);
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
weak_alias (__pread64, pread64)
|
||||
|
||||
#define __pread64(fd, buf, count, offset) \
|
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# define __pread64(fd, buf, count, offset) \
|
||||
static internal_function __emulate_pread64 (fd, buf, count, offset)
|
||||
#endif
|
||||
#include <sysdeps/posix/pread64.c>
|
||||
|
||||
#if __ASSUME_PREAD_SYSCALL == 0
|
||||
# include <sysdeps/posix/pread64.c>
|
||||
#endif
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
@ -23,10 +23,14 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#ifdef __NR_pwrite
|
||||
#include <kernel-features.h>
|
||||
|
||||
#if defined __NR_pwrite || __ASSUME_PWRITE_SYSCALL > 0
|
||||
|
||||
# if __ASSUME_PWRITE_SYSCALL == 0
|
||||
static ssize_t __emulate_pwrite (int fd, const void *buf, size_t count,
|
||||
off_t offset) internal_function;
|
||||
# endif
|
||||
|
||||
|
||||
ssize_t
|
||||
@ -40,16 +44,21 @@ __pwrite (fd, buf, count, offset)
|
||||
|
||||
/* First try the syscall. */
|
||||
result = INLINE_SYSCALL (pwrite, 5, fd, buf, count, offset, 0);
|
||||
# if __ASSUME_PWRITE_SYSCALL == 0
|
||||
if (result == -1 && errno == ENOSYS)
|
||||
/* No system call available. Use the emulation. */
|
||||
result = __emulate_pwrite (fd, buf, count, offset);
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
weak_alias (__pwrite, pwrite)
|
||||
|
||||
#define __pwrite(fd, buf, count, offset) \
|
||||
# define __pwrite(fd, buf, count, offset) \
|
||||
static internal_function __emulate_pwrite (fd, buf, count, offset)
|
||||
#endif
|
||||
#include <sysdeps/posix/pwrite.c>
|
||||
|
||||
#if __ASSUME_PWRITE_SYSCALL == 0
|
||||
# include <sysdeps/posix/pwrite.c>
|
||||
#endif
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
@ -23,10 +23,14 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#ifdef __NR_pwrite
|
||||
#include <kernel-features.h>
|
||||
|
||||
#if defined __NR_pwrite || __ASSUME_PWRITE_SYSCALL > 0
|
||||
|
||||
# if __ASSUME_PWRITE_SYSCALL == 0
|
||||
static ssize_t __emulate_pwrite64 (int fd, const void *buf, size_t count,
|
||||
off64_t offset) internal_function;
|
||||
# endif
|
||||
|
||||
|
||||
ssize_t
|
||||
@ -42,16 +46,21 @@ __pwrite64 (fd, buf, count, offset)
|
||||
result = INLINE_SYSCALL (pwrite, 5, fd, buf, count,
|
||||
(off_t) (offset & 0xffffffff),
|
||||
(off_t) (offset >> 32));
|
||||
# if __ASSUME_PWRITE_SYSCALL == 0
|
||||
if (result == -1 && errno == ENOSYS)
|
||||
/* No system call available. Use the emulation. */
|
||||
result = __emulate_pwrite64 (fd, buf, count, offset);
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
weak_alias (__pwrite64, pwrite64)
|
||||
|
||||
#define __pwrite64(fd, buf, count, offset) \
|
||||
# define __pwrite64(fd, buf, count, offset) \
|
||||
static internal_function __emulate_pwrite64 (fd, buf, count, offset)
|
||||
#endif
|
||||
#include <sysdeps/posix/pwrite64.c>
|
||||
|
||||
#if __ASSUME_PWRITE_SYSCALL == 0
|
||||
# include <sysdeps/posix/pwrite64.c>
|
||||
#endif
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
/* Initialization code run first thing by the ELF startup code. Linux version.
|
||||
Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
|
||||
Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
@ -17,12 +17,17 @@
|
||||
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||
Boston, MA 02111-1307, USA. */
|
||||
|
||||
#include <stdio.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
#include <sysdep.h>
|
||||
#include <fpu_control.h>
|
||||
#include <linux/personality.h>
|
||||
#include <init-first.h>
|
||||
#include <sys/param.h>
|
||||
#include <sys/sysctl.h>
|
||||
#include <sys/types.h>
|
||||
#include "kernel-features.h"
|
||||
|
||||
extern void __libc_init_secure (void);
|
||||
extern void __libc_init (int, char **, char **);
|
||||
@ -31,6 +36,10 @@ extern void __libc_global_ctors (void);
|
||||
/* The function is called from assembly stubs the compiler can't see. */
|
||||
static void init (int, char **, char **) __attribute__ ((unused));
|
||||
|
||||
/* The function we use to get the kernel revision. */
|
||||
extern int __sysctl (int *name, int nlen, void *oldval, size_t *oldlenp,
|
||||
void *newval, size_t newlen);
|
||||
|
||||
extern int _dl_starting_up;
|
||||
weak_extern (_dl_starting_up)
|
||||
|
||||
@ -56,6 +65,69 @@ init (int argc, char **argv, char **envp)
|
||||
/* We must not call `personality' twice. */
|
||||
if (!__libc_multiple_libcs)
|
||||
{
|
||||
/* Test whether the kernel is new enough. This test is only
|
||||
performed if the library is not compiled to run on all
|
||||
kernels. */
|
||||
if (__LINUX_KERNEL_VERSION > 0)
|
||||
{
|
||||
static const int sysctl_args[] = { CTL_KERN, KERN_OSRELEASE };
|
||||
char buf[64];
|
||||
size_t reslen = sizeof (buf);
|
||||
unsigned int version;
|
||||
int parts;
|
||||
char *cp;
|
||||
|
||||
/* Try reading the number using `sysctl' first. */
|
||||
if (__sysctl ((int *) sysctl_args,
|
||||
sizeof (sysctl_args) / sizeof (sysctl_args[0]),
|
||||
buf, &reslen, NULL, 0) < 0)
|
||||
{
|
||||
/* This was not successful. Now try reading the /proc
|
||||
filesystem. */
|
||||
int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY);
|
||||
if (fd == -1
|
||||
|| (reslen = __read (fd, buf, sizeof (buf))) <= 0)
|
||||
/* This also didn't work. We give up since we cannot
|
||||
make sure the library can actually work. */
|
||||
__libc_fatal ("FATAL: cannot determine library version\n");
|
||||
|
||||
__close (fd);
|
||||
}
|
||||
buf[MIN (reslen, sizeof (buf) - 1)] = '\0';
|
||||
|
||||
/* Now convert it into a number. The string consists of at most
|
||||
three parts. */
|
||||
version = 0;
|
||||
parts = 0;
|
||||
cp = buf;
|
||||
while ((*cp >= '0') && (*cp <= '9'))
|
||||
{
|
||||
unsigned int here = *cp++ - '0';
|
||||
|
||||
while ((*cp >= '0') && (*cp <= '9'))
|
||||
{
|
||||
here *= 10;
|
||||
here += *cp++ - '0';
|
||||
}
|
||||
|
||||
++parts;
|
||||
version <<= 8;
|
||||
version |= here;
|
||||
|
||||
if (*cp++ != '.')
|
||||
/* Another part following? */
|
||||
break;
|
||||
}
|
||||
|
||||
if (parts < 3)
|
||||
version <<= 8 * (3 - parts);
|
||||
|
||||
/* Now we can test with the required version. */
|
||||
if (version < __LINUX_KERNEL_VERSION)
|
||||
/* Not sufficent. */
|
||||
__libc_fatal ("FATAL: kernel too old\n");
|
||||
}
|
||||
|
||||
/* The `personality' system call takes one argument that chooses
|
||||
the "personality", i.e. the set of system calls and such. We
|
||||
must make this call first thing to disable emulation of some
|
||||
|
||||
74
sysdeps/unix/sysv/linux/kernel-features.h
Normal file
74
sysdeps/unix/sysv/linux/kernel-features.h
Normal file
@ -0,0 +1,74 @@
|
||||
/* Set flags signalling availability of kernel features based on given
|
||||
kernel version number.
|
||||
Copyright (C) 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Library General Public License as
|
||||
published by the Free Software Foundation; either version 2 of the
|
||||
License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Library General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
||||
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||
Boston, MA 02111-1307, USA. */
|
||||
|
||||
/* This file must not contain any C code. At least it must be protected
|
||||
to allow using the file also in assembler files. */
|
||||
|
||||
/* XXX For testing. */
|
||||
#define __LINUX_KERNEL_VERSION 131584
|
||||
|
||||
#ifndef __LINUX_KERNEL_VERSION
|
||||
/* We assume the worst; all kernels should be supported. */
|
||||
# define __LINUX_KERNEL_VERSION 0
|
||||
#endif
|
||||
|
||||
/* We assume for __LINUX_KERNEL_VERSION the same encoding used in
|
||||
linux/version.h. I.e., the major, minor, and subminor all get a
|
||||
byte with the major number being in the highest byte. This means
|
||||
we can do numeric comparisons.
|
||||
|
||||
In the following we will define certain symbols depending on
|
||||
whether the describes kernel feature is available in the kernel
|
||||
version given by __LINUX_KERNEL_VERSION. We are not always exactly
|
||||
recording the correct versions in which the features were
|
||||
introduced. If somebody cares these values can afterwards be
|
||||
corrected. Most of the numbers here are set corresponding to
|
||||
2.2.0. */
|
||||
|
||||
/* `getcwd' system call. */
|
||||
#if __LINUX_KERNEL_VERSION >= 131584
|
||||
# define __ASSUME_GETCWD_SYSCALL 1
|
||||
#endif
|
||||
|
||||
/* Real-time signal became usable in 2.1.70. */
|
||||
#if __LINUX_KERNEL_VERSION >= 131398
|
||||
# define __ASSUME_REALTIME_SIGNALS 1
|
||||
#endif
|
||||
|
||||
/* When were the `pread'/`pwrite' syscalls introduced? */
|
||||
#if __LINUX_KERNEL_VERSION >= 131584
|
||||
# define __ASSUME_PREAD_SYSCALL 1
|
||||
# define __ASSUME_PWRITE_SYSCALL 1
|
||||
#endif
|
||||
|
||||
/* When was `poll' introduced? */
|
||||
#if __LINUX_KERNEL_VERSION >= 131584
|
||||
# define __ASSUME_POLL_SYSCALL 1
|
||||
#endif
|
||||
|
||||
/* The `lchown' syscall was introduced in 2.1.80. */
|
||||
#if __LINUX_KERNEL_VERSION >= 131408
|
||||
# define __ASSUME_LCHOWN_SYSCALL 1
|
||||
#endif
|
||||
|
||||
/* When did the `setresuid' sysall became available? */
|
||||
#if __LINUX_KERNEL_VERSION >= 131584
|
||||
# define __ASSUME_SETRESUID_SYSCALL 1
|
||||
#endif
|
||||
@ -22,13 +22,18 @@
|
||||
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
#ifdef __NR_poll
|
||||
|
||||
#include "kernel-features.h"
|
||||
|
||||
#if defined __NR_poll || __ASSUME_POLL_SYSCALL > 0
|
||||
|
||||
extern int __syscall_poll __P ((struct pollfd *fds, unsigned int nfds,
|
||||
int timeout));
|
||||
|
||||
# if __ASSUME_POLL_SYSCALL == 0
|
||||
static int __emulate_poll __P ((struct pollfd *fds, unsigned long int nfds,
|
||||
int timeout)) internal_function;
|
||||
# endif
|
||||
|
||||
/* The real implementation. */
|
||||
int
|
||||
@ -37,6 +42,7 @@ __poll (fds, nfds, timeout)
|
||||
unsigned long int nfds;
|
||||
int timeout;
|
||||
{
|
||||
# if __ASSUME_POLL_SYSCALL == 0
|
||||
static int must_emulate;
|
||||
|
||||
if (!must_emulate)
|
||||
@ -52,6 +58,9 @@ __poll (fds, nfds, timeout)
|
||||
}
|
||||
|
||||
return __emulate_poll (fds, nfds, timeout);
|
||||
# else
|
||||
return INLINE_SYSCALL (poll, 3, fds, nfds, timeout);
|
||||
# endif
|
||||
}
|
||||
weak_alias (__poll, poll)
|
||||
|
||||
@ -59,4 +68,7 @@ weak_alias (__poll, poll)
|
||||
# define __poll(fds, nfds, timeout) \
|
||||
static internal_function __emulate_poll (fds, nfds, timeout)
|
||||
#endif
|
||||
#include <sysdeps/unix/bsd/poll.c>
|
||||
|
||||
#if __ASSUME_POLL_SYSCALL == 0
|
||||
# include <sysdeps/unix/bsd/poll.c>
|
||||
#endif
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
@ -23,13 +23,17 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#ifdef __NR_pread
|
||||
#include "kernel-features.h"
|
||||
|
||||
#if defined __NR_pread || __ASSUME_PREAD_SYSCALL > 0
|
||||
|
||||
extern ssize_t __syscall_pread (int fd, void *buf, size_t count,
|
||||
off_t offset_hi, off_t offset_lo);
|
||||
|
||||
# if __ASSUME_PREAD_SYSCALL == 0
|
||||
static ssize_t __emulate_pread (int fd, void *buf, size_t count,
|
||||
off_t offset) internal_function;
|
||||
# endif
|
||||
|
||||
|
||||
ssize_t
|
||||
@ -43,16 +47,21 @@ __pread (fd, buf, count, offset)
|
||||
|
||||
/* First try the syscall. */
|
||||
result = INLINE_SYSCALL (pread, 5, fd, buf, count, 0, offset);
|
||||
# if __ASSUME_PREAD_SYSCALL == 0
|
||||
if (result == -1 && errno == ENOSYS)
|
||||
/* No system call available. Use the emulation. */
|
||||
result = __emulate_pread (fd, buf, count, offset);
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
weak_alias (__pread, pread)
|
||||
|
||||
#define __pread(fd, buf, count, offset) \
|
||||
# define __pread(fd, buf, count, offset) \
|
||||
static internal_function __emulate_pread (fd, buf, count, offset)
|
||||
#endif
|
||||
#include <sysdeps/posix/pread.c>
|
||||
|
||||
#if __ASSUME_PREAD_SYSCALL == 0
|
||||
# include <sysdeps/posix/pread.c>
|
||||
#endif
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
@ -23,13 +23,17 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#ifdef __NR_pread
|
||||
#include "kernel-features.h"
|
||||
|
||||
#if defined __NR_pread || __ASSUME_PREAD_SYSCALL > 0
|
||||
|
||||
extern ssize_t __syscall_pread (int fd, void *buf, size_t count,
|
||||
off_t offset_hi, off_t offset_lo);
|
||||
|
||||
# if __ASSUME_PREAD_SYSCALL == 0
|
||||
static ssize_t __emulate_pread64 (int fd, void *buf, size_t count,
|
||||
off64_t offset) internal_function;
|
||||
# endif
|
||||
|
||||
|
||||
ssize_t
|
||||
@ -44,16 +48,21 @@ __pread64 (fd, buf, count, offset)
|
||||
/* First try the syscall. */
|
||||
result = INLINE_SYSCALL (pread, 5, fd, buf, count, (off_t) (offset >> 32),
|
||||
(off_t) (offset & 0xffffffff));
|
||||
# if __ASSUME_PREAD_SYSCALL == 0
|
||||
if (result == -1 && errno == ENOSYS)
|
||||
/* No system call available. Use the emulation. */
|
||||
result = __emulate_pread64 (fd, buf, count, offset);
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
weak_alias (__pread64, pread64)
|
||||
|
||||
#define __pread64(fd, buf, count, offset) \
|
||||
# define __pread64(fd, buf, count, offset) \
|
||||
static internal_function __emulate_pread64 (fd, buf, count, offset)
|
||||
#endif
|
||||
#include <sysdeps/posix/pread64.c>
|
||||
|
||||
# if __ASSUME_PREAD_SYSCALL == 0
|
||||
# include <sysdeps/posix/pread64.c>
|
||||
#endif
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
@ -23,13 +23,17 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#ifdef __NR_pwrite
|
||||
#include "kernel-features.h"
|
||||
|
||||
#if defined __NR_pwrite || __ASSUME_PWRITE_SYSCALL > 0
|
||||
|
||||
extern ssize_t __syscall_pwrite (int fd, const void *buf, size_t count,
|
||||
off_t offset_hi, off_t offset_lo);
|
||||
|
||||
# if __ASSUME_PWRITE_SYSCALL == 0
|
||||
static ssize_t __emulate_pwrite (int fd, const void *buf, size_t count,
|
||||
off_t offset) internal_function;
|
||||
# endif
|
||||
|
||||
|
||||
ssize_t
|
||||
@ -43,16 +47,21 @@ __pwrite (fd, buf, count, offset)
|
||||
|
||||
/* First try the syscall. */
|
||||
result = INLINE_SYSCALL (pwrite, 5, fd, buf, count, 0, offset);
|
||||
# if __ASSUME_PWRITE_SYSCALL == 0
|
||||
if (result == -1 && errno == ENOSYS)
|
||||
/* No system call available. Use the emulation. */
|
||||
result = __emulate_pwrite (fd, buf, count, offset);
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
weak_alias (__pwrite, pwrite)
|
||||
|
||||
#define __pwrite(fd, buf, count, offset) \
|
||||
# define __pwrite(fd, buf, count, offset) \
|
||||
static internal_function __emulate_pwrite (fd, buf, count, offset)
|
||||
#endif
|
||||
#include <sysdeps/posix/pwrite.c>
|
||||
|
||||
#if __ASSUME_PWRITE_SYSCALL == 0
|
||||
# include <sysdeps/posix/pwrite.c>
|
||||
#endif
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
@ -23,13 +23,17 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#ifdef __NR_pwrite
|
||||
#include "kernel-features.h"
|
||||
|
||||
#if defined __NR_pwrite || __ASSUME_PWRITE_SYSCALL > 0
|
||||
|
||||
extern ssize_t __syscall_pwrite64 (int fd, const void *buf, size_t count,
|
||||
off_t offset_hi, off_t offset_lo);
|
||||
|
||||
# if __ASSUME_PWRITE_SYSCALL == 0
|
||||
static ssize_t __emulate_pwrite64 (int fd, const void *buf, size_t count,
|
||||
off64_t offset) internal_function;
|
||||
# endif
|
||||
|
||||
|
||||
ssize_t
|
||||
@ -44,16 +48,21 @@ __pwrite64 (fd, buf, count, offset)
|
||||
/* First try the syscall. */
|
||||
result = INLINE_SYSCALL (pwrite, 5, fd, buf, count, (off_t) (offset >> 32),
|
||||
(off_t) (offset & 0xffffffff));
|
||||
# if __ASSUME_PWRITE_SYSCALL == 0
|
||||
if (result == -1 && errno == ENOSYS)
|
||||
/* No system call available. Use the emulation. */
|
||||
result = __emulate_pwrite64 (fd, buf, count, offset);
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
weak_alias (__pwrite64, pwrite64)
|
||||
|
||||
#define __pwrite64(fd, buf, count, offset) \
|
||||
# define __pwrite64(fd, buf, count, offset) \
|
||||
static internal_function __emulate_pwrite64 (fd, buf, count, offset)
|
||||
#endif
|
||||
#include <sysdeps/posix/pwrite64.c>
|
||||
|
||||
#if __ASSUME_PWRITE_SYSCALL == 0
|
||||
# include <sysdeps/posix/pwrite64.c>
|
||||
#endif
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* Copyright (C) 1998 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 1998, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
@ -21,7 +21,9 @@
|
||||
#include <sys/types.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#ifdef __NR_setresuid
|
||||
#include "kernel-features.h"
|
||||
|
||||
#if defined __NR_setresuid || __ASSUME_SETRESUID_SYSCALL > 0
|
||||
|
||||
extern int __setresuid (uid_t ruid, uid_t euid, uid_t suid);
|
||||
|
||||
@ -38,11 +40,13 @@ seteuid (uid_t uid)
|
||||
|
||||
/* First try the syscall. */
|
||||
result = __setresuid (-1, uid, -1);
|
||||
# if __ASSUME_SETRESUID_SYSCALL == 0
|
||||
if (result == -1 && errno == ENOSYS)
|
||||
/* No system call available. Use emulation. This may not work
|
||||
since `setreuid' also sets the saved user ID when UID is not
|
||||
equal to the real user ID, making it impossible to switch back. */
|
||||
result = __setreuid (-1, uid);
|
||||
# endif
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
@ -23,20 +23,27 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#include "kernel-features.h"
|
||||
|
||||
/* The difference here is that the sigaction structure used in the
|
||||
kernel is not the same as we use in the libc. Therefore we must
|
||||
translate it here. */
|
||||
#include <kernel_sigaction.h>
|
||||
|
||||
extern int __syscall_sigaction (int, const struct old_kernel_sigaction *,
|
||||
struct old_kernel_sigaction *);
|
||||
extern int __syscall_rt_sigaction (int, const struct kernel_sigaction *,
|
||||
struct kernel_sigaction *, size_t);
|
||||
|
||||
#if __ASSUME_REALTIME_SIGNALS == 0
|
||||
/* The variable is shared between all wrappers around signal handling
|
||||
functions which have RT equivalents. This is the definition. */
|
||||
int __libc_missing_rt_sigs;
|
||||
|
||||
extern int __syscall_sigaction (int, const struct old_kernel_sigaction *,
|
||||
struct old_kernel_sigaction *);
|
||||
# define rtsignals_guaranteed 0
|
||||
#else
|
||||
# define rtsignals_guaranteed 1
|
||||
#endif
|
||||
extern int __syscall_rt_sigaction (int, const struct kernel_sigaction *,
|
||||
struct kernel_sigaction *, size_t);
|
||||
|
||||
|
||||
/* If ACT is not NULL, change the action for SIG to *ACT.
|
||||
If OACT is not NULL, put the old action for SIG in *OACT. */
|
||||
@ -49,12 +56,18 @@ __sigaction (sig, act, oact)
|
||||
struct old_kernel_sigaction k_sigact, k_osigact;
|
||||
int result;
|
||||
|
||||
#ifdef __NR_rt_sigaction
|
||||
#if defiend __NR_rt_sigaction || __ASSUME_REALTIME_SIGNALS > 0
|
||||
/* First try the RT signals. */
|
||||
# if __ASSUME_REALTIME_SIGNALS == 0
|
||||
if (!__libc_missing_rt_sigs)
|
||||
# endif
|
||||
{
|
||||
struct kernel_sigaction kact, koact;
|
||||
/* Save the current error value for later. We need not do this
|
||||
if we are guaranteed to have realtime signals. */
|
||||
# if __ASSUME_REALTIME_SIGNALS == 0
|
||||
int saved_errno = errno;
|
||||
# endif
|
||||
|
||||
if (act)
|
||||
{
|
||||
@ -71,7 +84,9 @@ __sigaction (sig, act, oact)
|
||||
result = INLINE_SYSCALL (rt_sigaction, 4, sig, act ? &kact : NULL,
|
||||
oact ? &koact : NULL, _NSIG / 8);
|
||||
|
||||
# if __ASSUME_REALTIME_SIGNALS == 0
|
||||
if (result >= 0 || errno != ENOSYS)
|
||||
# endif
|
||||
{
|
||||
if (oact && result >= 0)
|
||||
{
|
||||
@ -85,19 +100,22 @@ __sigaction (sig, act, oact)
|
||||
return result;
|
||||
}
|
||||
|
||||
# if __ASSUME_REALTIME_SIGNALS == 0
|
||||
__set_errno (saved_errno);
|
||||
__libc_missing_rt_sigs = 1;
|
||||
# endif
|
||||
}
|
||||
#endif
|
||||
|
||||
#if __ASSUME_REALTIME_SIGNALS == 0
|
||||
if (act)
|
||||
{
|
||||
k_sigact.k_sa_handler = act->sa_handler;
|
||||
k_sigact.sa_mask = act->sa_mask.__val[0];
|
||||
k_sigact.sa_flags = act->sa_flags;
|
||||
#ifdef HAVE_SA_RESTORER
|
||||
# ifdef HAVE_SA_RESTORER
|
||||
k_sigact.sa_restorer = act->sa_restorer;
|
||||
#endif
|
||||
# endif
|
||||
}
|
||||
result = INLINE_SYSCALL (sigaction, 3, sig, act ? &k_sigact : NULL,
|
||||
oact ? &k_osigact : NULL);
|
||||
@ -106,11 +124,12 @@ __sigaction (sig, act, oact)
|
||||
oact->sa_handler = k_osigact.k_sa_handler;
|
||||
oact->sa_mask.__val[0] = k_osigact.sa_mask;
|
||||
oact->sa_flags = k_osigact.sa_flags;
|
||||
#ifdef HAVE_SA_RESTORER
|
||||
# ifdef HAVE_SA_RESTORER
|
||||
oact->sa_restorer = k_osigact.sa_restorer;
|
||||
#endif
|
||||
# endif
|
||||
}
|
||||
return result;
|
||||
#endif
|
||||
}
|
||||
|
||||
weak_alias (__sigaction, sigaction)
|
||||
|
||||
@ -23,6 +23,8 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#include "kernel-features.h"
|
||||
|
||||
extern int __syscall_sigpending (sigset_t *);
|
||||
extern int __syscall_rt_sigpending (sigset_t *, size_t);
|
||||
|
||||
@ -38,7 +40,10 @@ int
|
||||
sigpending (set)
|
||||
sigset_t *set;
|
||||
{
|
||||
#ifdef __NR_rt_pending
|
||||
#if __ASSUME_REALTIME_SIGNALS > 0
|
||||
return INLINE_SYSCALL (rt_sigpending, 2, set, _NSIG / 8);
|
||||
#else
|
||||
# ifdef __NR_rt_pending
|
||||
/* First try the RT signals. */
|
||||
if (!__libc_missing_rt_sigs)
|
||||
{
|
||||
@ -53,7 +58,8 @@ sigpending (set)
|
||||
__set_errno (saved_errno);
|
||||
__libc_missing_rt_sigs = 1;
|
||||
}
|
||||
#endif
|
||||
# endif
|
||||
|
||||
return INLINE_SYSCALL (sigpending, 1, set);
|
||||
#endif
|
||||
}
|
||||
|
||||
@ -23,6 +23,9 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#include "kernel-features.h"
|
||||
|
||||
|
||||
extern int __syscall_sigprocmask (int, const sigset_t *, sigset_t *);
|
||||
extern int __syscall_rt_sigprocmask (int, const sigset_t *, sigset_t *,
|
||||
size_t);
|
||||
@ -39,7 +42,10 @@ __sigprocmask (how, set, oset)
|
||||
const sigset_t *set;
|
||||
sigset_t *oset;
|
||||
{
|
||||
#ifdef __NR_rt_sigprocmask
|
||||
#if __ASSUME_REALTIME_SIGNALS > 0
|
||||
return INLINE_SYSCALL (rt_sigprocmask, 4, how, set, oset, _NSIG / 8);
|
||||
#else
|
||||
# ifdef __NR_rt_sigprocmask
|
||||
/* First try the RT signals. */
|
||||
if (!__libc_missing_rt_sigs)
|
||||
{
|
||||
@ -55,8 +61,9 @@ __sigprocmask (how, set, oset)
|
||||
__set_errno (saved_errno);
|
||||
__libc_missing_rt_sigs = 1;
|
||||
}
|
||||
#endif
|
||||
# endif
|
||||
|
||||
return INLINE_SYSCALL (sigprocmask, 3, how, set, oset);
|
||||
#endif
|
||||
}
|
||||
weak_alias (__sigprocmask, sigprocmask)
|
||||
|
||||
@ -23,6 +23,8 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#include "kernel-features.h"
|
||||
|
||||
extern int __syscall_sigsuspend (int, unsigned long int, unsigned long int);
|
||||
extern int __syscall_rt_sigsuspend (const sigset_t *, size_t);
|
||||
|
||||
@ -38,7 +40,10 @@ int
|
||||
__sigsuspend (set)
|
||||
const sigset_t *set;
|
||||
{
|
||||
#ifdef __NR_rt_sigsuspend
|
||||
#if __ASSUME_REALTIME_SIGNALS
|
||||
return INLINE_SYSCALL (rt_sigsuspend, 2, set, _NSIG / 8);
|
||||
#else
|
||||
# ifdef __NR_rt_sigsuspend
|
||||
/* First try the RT signals. */
|
||||
if (!__libc_missing_rt_sigs)
|
||||
{
|
||||
@ -53,8 +58,9 @@ __sigsuspend (set)
|
||||
__set_errno (saved_errno);
|
||||
__libc_missing_rt_sigs = 1;
|
||||
}
|
||||
#endif
|
||||
# endif
|
||||
|
||||
return INLINE_SYSCALL (sigsuspend, 3, 0, 0, set->__val[0]);
|
||||
#endif
|
||||
}
|
||||
weak_alias (__sigsuspend, sigsuspend)
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
/* Read or write system information. Linux version.
|
||||
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
|
||||
Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
@ -26,8 +26,8 @@
|
||||
extern int __syscall__sysctl (struct __sysctl_args *args);
|
||||
|
||||
int
|
||||
sysctl (int *name, int nlen, void *oldval, size_t *oldlenp,
|
||||
void *newval, size_t newlen)
|
||||
__sysctl (int *name, int nlen, void *oldval, size_t *oldlenp,
|
||||
void *newval, size_t newlen)
|
||||
{
|
||||
struct __sysctl_args args =
|
||||
{
|
||||
@ -41,3 +41,4 @@ sysctl (int *name, int nlen, void *oldval, size_t *oldlenp,
|
||||
|
||||
return INLINE_SYSCALL (_sysctl, 1, &args);
|
||||
}
|
||||
weak_alias (__sysctl, sysctl)
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
/* Test whether RT signals are really available.
|
||||
Copyright (C) 1997 Free Software Foundation, Inc.
|
||||
Copyright (C) 1997, 1999 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
@ -21,10 +21,16 @@
|
||||
#include <string.h>
|
||||
#include <sys/utsname.h>
|
||||
|
||||
#include "kernel-features.h"
|
||||
|
||||
static int
|
||||
kernel_has_rtsig (void)
|
||||
{
|
||||
#if __ASSUME_REALTIME_SIGNALS
|
||||
return 1;
|
||||
#else
|
||||
struct utsname name;
|
||||
|
||||
return uname (&name) == 0 && __strverscmp (name.release, "2.1.70") >= 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user