| Commit message (Collapse) | Author | Age | Files | Lines |
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The embedded brains GmbH & Co. KG is the legal successor of embedded
brains GmbH.
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Created futimens.c and utimensat.c to add support for the POSIX
methods futimens() and utimensat().
utime() and utimes() are considered obsolote by POSIX, but RTEMS
will continue to support them.
Closes #4396
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There was a race conditon in the reference counting of file descriptors
during a close() operation. After the call to the close handler, the
rtems_libio_free() function cleared the flags to zero. However, at this
point in time there may still exist some holders of the file descriptor.
With RTEMS_DEBUG enabled this could lead to failed assertions in
rtems_libio_iop_drop().
Change the code to use only atomic read-modify-write operations on the
rtems_libio_iop::flags.
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The IO library used a POSIX key to store an optional POSIX user
environment pointer. This pulled in the POSIX keys support in every
application configuration. Add a user environment pointer to the thread
control block (TCB) instead. Applications which do not need the POSIX
user environment will just get an overhead of one pointer per thread.
Close #3882.
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Update #3706.
Types and Mount, IO Internal, Kernel Print Support
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A speciality of the RTEMS build system was the make preinstall step. It
copied header files from arbitrary locations into the build tree. The
header files were included via the -Bsome/build/tree/path GCC command
line option.
This has at least seven problems:
* The make preinstall step itself needs time and disk space.
* Errors in header files show up in the build tree copy. This makes it
hard for editors to open the right file to fix the error.
* There is no clear relationship between source and build tree header
files. This makes an audit of the build process difficult.
* The visibility of all header files in the build tree makes it
difficult to enforce API barriers. For example it is discouraged to
use BSP-specifics in the cpukit.
* An introduction of a new build system is difficult.
* Include paths specified by the -B option are system headers. This
may suppress warnings.
* The parallel build had sporadic failures on some hosts.
This patch removes the make preinstall step. All installed header
files are moved to dedicated include directories in the source tree.
Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc,
etc. Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g.
erc32, imx, qoriq, etc.
The new cpukit include directories are:
* cpukit/include
* cpukit/score/cpu/@RTEMS_CPU@/include
* cpukit/libnetworking
The new BSP include directories are:
* bsps/include
* bsps/@RTEMS_CPU@/include
* bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include
There are build tree include directories for generated files.
The include directory order favours the most general header file, e.g.
it is not possible to override general header files via the include path
order.
The "bootstrap -p" option was removed. The new "bootstrap -H" option
should be used to regenerate the "headers.am" files.
Update #3254.
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* include/rtems/libio.h: Remove.
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* configure.ac: Use AS_IF instead of if/then/else.
Add AC_DEFINE_UNQUOTED(RTEMS_UNIX) for RTEMS_CPU==unix.
Add AC_DEFINE_UNQUOTED(RTEMS_UNIXLIB) for RTEMS_CPU==unix.
Add include/Makefile to CONFIG_FILES.
Add AC_ENABLE_MULITLIB.
Remove wrapup/rtems, wrapup/itron, wrapup/posix.
Remove */optman/Makefile from CONFIG_FILES.
* Makefile.am: Add include to SUBDIRS.
* rtems/Makefile.am: Remove optman from SUBDIRS.
* sapi/Makefile.am: Remove optman from SUBDIRS.
* include/Makefile.am: New file.
* include/rtems/bspIo.h: Relocated from lib/include.
* include/rtems/libio_.h: Relocated from lib/include.
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* libc/libio.c: Initialize more fields to NULL/0 during initialiation.
* include/rtems/libio_.h: Fix freenode macro so it works for sockets
which do not have the full set of filesystem operations and are
initialized via something other than open().
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* include/rtems/libio_.h: Added ifdef to ensure that LOGIN_NAME_MAX
is defined on GNU/Linux (RedHat 6.2 distribution).
* libc/unixlibc.c: Added stubs for rtems_io_register_name() and
rtems_io_lookup_name() so UNIX port would compile the IO manager
sptest that registers /dev/null.
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* include/rtems/libio_.h: Added login name, uid, gid, euid, and egid
so they can be part of the private environment.
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* include/rtems/libio_.h, libc/chroot.c, libc/privateenv.c:
Private environment and chroot() enhancements and fixes. Comments:
+ privateenv has been modified to let at chroot() to be more
POSIX like Sergei Organov recommended.
+ A task owner lets that rtems_set_private_env() will be
called twice or more times.
+ chroot() can be called without a previous
rtems_set_private_env(); (transpanrently)
+ The second call of rtems_set_private_env() makes a internal
chroot("/") into global imfs_root.
+ chroot() runs like chdir() without a previous chdir("/") with
the global root.
+ The current directory can be in a wrong place like Linux and
many other Unices.
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* Alternate email is correo@fernando-ruiz.com
* libc/privateenv.c: New file.
* include/rtems/libio_.h, libc/Makefile.am, libc/base_fs.c,
libc/unmount.c: Moved default umask, current working directory,
root, and links followed count into a structure "user environment"
that can then be treated as a unit. This enable giving unique
copies of these to individual threads or collection of threads.
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* include/Makefile.am, include/rtems/libio_.h, libc/Makefile.am,
libc/assoc.c, libc/assocnamebad.c, libc/base_fs.c, libc/cfsetispeed.c,
libc/cfsetospeed.c, libc/chdir.c, libc/chmod.c, libc/chown.c,
libc/close.c, libc/closedir.c, libc/dup2.c, libc/error.c, libc/eval.c,
libc/fchdir.c, libc/fchmod.c, libc/fcntl.c, libc/fdatasync.c,
libc/fpathconf.c, libc/fstat.c, libc/fsync.c, libc/ftruncate.c,
libc/getdents.c, libc/ioctl.c, libc/libio.c, libc/libio_sockets.c,
libc/link.c, libc/lseek.c, libc/malloc.c, libc/mallocfreespace.c,
libc/mknod.c, libc/mount.c, libc/newlibc.c, libc/no_libc.c,
libc/open.c, libc/read.c, libc/readlink.c, libc/rmdir.c, libc/stat.c,
libc/symlink.c, libc/tcsetattr.c, libc/telldir.c, libc/ttyname.c,
libc/ttyname_r.c, libc/umask.c, libc/unlink.c, libc/unmount.c,
libc/utime.c, libc/write.c:
assoc.h, error.h, libio_.h, libio.h, and libcsupport.h moved
from libc to lib/include/rtems and now must be referenced as
<rtems/XXX.h>.
* include/rtems/Makefile.am, include/rtems/.cvsignore: New file.
* include/rtems/assoc.h, include/rtems/error.h,
include/rtems/libcsupport.h, include/rtems/libio.h,
include/rtems/libio_.h: New/moved files.
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* libc/libio.h (rtems_filesystem_file_handlers_r,
rtems_filesystem_operations_table): Added _h to all structure
fields to indicate they are "handlers".
* libc/libio_.h, libc/chdir.c, libc/chmod.c, libc/chown.c,
libc/close.c, libc/eval.c, libc/fchdir.c, libc/fchmod.c,
libc/fcntl.c, libc/fdatasync.c, libc/fstat.c, libc/fsync.c,
libc/ftruncate.c, libc/getdents.c, libc/imfs_eval.c,
libc/imfs_unlink.c, libc/ioctl.c, libc/ioman.c, libc/link.c,
libc/lseek.c, libc/mknod.c, libc/mount.c, libc/open.c, libc/read.c,
libc/readlink.c, libc/rmdir.c, libc/stat.c, libc/symlink.c,
libc/unlink.c, libc/unmount.c, libc/utime.c, libc/write.c:
Modified to reflect above name change.
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Renamed IMFS handler tables to include IMFS prefix.
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places to make sure memory allocated for filesystem specifif nodes
gets freed.
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would work. At the same time, the initial implementation of F_SETFL
was added. A support routine was added to convert internal libio
flags back to the POSIX style. Eventually the internal representation
should be eliminated in the interest of simplicity and code reduction.
This problem was reported by Jake Janovetz <janovetz@tempest.ece.uiuc.edu>.
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IO handlers scheme that was implemented originally just to support
sockets. The file system IO switch is more general and works fine.
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<ian@airs.com> to fix this problem:
There is a small bug in __rtems_close in c/src/lib/libc/libio.c. It
does not check whether the file descriptor it is passed is open. This
can cause it to make a null dereference if it is passed a file
descriptor which is in the valid range but which was not opened, or
which was already closed.
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all conflicts.
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overhaul of the RTEMS system call interface. This base file system is
the "In-Memory File System" aka IMFS.
The design and implementation was done by the following people:
+ Joel Sherrill (joel@OARcorp.com)
+ Jennifer Averett (jennifer@OARcorp.com)
+ Steve "Mr Mount" Salitasc (salitasc@OARcorp.com)
+ Kerwin Wade (wade@OARcorp.com)
PROBLEMS
========
+ It is VERY likely that merging this will break the UNIX port. This
can/will be fixed.
+ There is likely some reentrancy/mutual exclusion needed.
+ Eventually, there should be a "mini-IMFS" description table to
eliminate links, symlinks, etc to save memory. All you need to
have "classic RTEMS" functionality is technically directories
and device IO. All the rest could be left out to save memory.
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