mirror of https://github.com/vitalif/e2fsprogs
Add to the ss (subsystem) library the ability to dynamically link
to the readline library if it is present in the system.bitmap-optimize
Theodore Ts'o
parent
63182203a7
commit
3ae497eab2
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@ -1,3 +1,7 @@
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2003-03-16 Theodore Ts'o <tytso@mit.edu>
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* configure.in: Check to see if libdl exists for the sake of dlopen
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2003-03-14 Theodore Ts'o <tytso@mit.edu>
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* configure.in: Add support for Apple/Darwin shared libraries.
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@ -625,6 +625,14 @@ SOCKET_LIB=''
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AC_CHECK_LIB(socket, socket, [SOCKET_LIB=-lsocket])
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AC_SUBST(SOCKET_LIB)
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dnl
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dnl Check to see if libdl exists for the sake of dlopen
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dnl
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DLOPEN_LIB=''
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AC_CHECK_LIB(dl, dlopen,
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[DLOPEN_LIB=-ldl
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AC_DEFINE(HAVE_DLOPEN)])
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AC_SUBST(DLOPEN_LIB)
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dnl
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dnl See if optreset exists
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dnl
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AC_MSG_CHECKING(for optreset)
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@ -11,7 +11,7 @@ Priority: optional
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Depends: e2fsprogs (= ${Source-Version}), ${misc:Depends}
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Recommends: sash | zsh-static | busybox-static | zsh30-static
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Architecture: any
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Description: A statically-linked version of the ext2 filesystem checker.
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Description: A statically-linked version of the ext2 filesystem checker
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This may be of some help to you if your filesystem gets corrupted enough
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to break the shared libraries used by the dynamically linked checker.
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.
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@ -28,7 +28,7 @@ Depends: ${libcdev:Depends}, libcomerr2, ${misc:Depends}
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Suggests: doc-base
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Conflicts: e2fsprogs (<< 1.10-6)
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Architecture: any
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Description: The Common Error Description library - headers and static libraries.
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Description: The Common Error Description library - headers and static libraries
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libcomerr is an attempt to present a common error-handling mechanism to
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manipulate the most common form of error code in a fashion that does not
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have the problems identified with mechanisms commonly in use.
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@ -39,7 +39,7 @@ Priority: extra
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Depends: ${libcdev:Depends}, libss2, ${misc:Depends}
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Conflicts: e2fsprogs (<< 1.10-6)
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Architecture: any
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Description: Command-line interface parsing library - headers and static libraries.
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Description: Command-line interface parsing library - headers and static libraries
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This package includes a tool that parses a command table to generate
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a simple command-line interface parser, the include files needed to
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compile and use it, and the static libs.
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@ -53,7 +53,7 @@ Depends: ${libcdev:Depends}, e2fsprogs (= ${Source-Version}), ${misc:Depends}
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Conflicts: e2fsprogs (<< 1.10-6)
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Replaces: e2fslibs-dev (<< 1.15)
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Architecture: any
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Description: Universally unique id library - headers and static libraries.
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Description: Universally unique id library - headers and static libraries
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libuuid generates and parses 128-bit universally unique id's (UUID's),
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using a standard which is blessed by both Microsoft and DCE, and is
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being proposed as an internet standard. See the internet-draft:
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@ -62,6 +62,32 @@ Description: Universally unique id library - headers and static libraries.
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.
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for more information.
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Package: libblkid
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Section: libs
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Priority: required
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Depends: ${libcdev:Depends}
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Architecture: any
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Description: Block device id library
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The blkid library which allows system programs like fsck and
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mount to quickly and easily find block devices by filesystem UUID and
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LABEL. This allows system administrators to avoid specifiying
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filesystems by hard-coded device names, but via a logical naming
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system instead.
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Package: libblkid-dev
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Section: devel
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Priority: extra
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Depends: libblkid (= ${Source-Version})
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Architecture: any
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Description: Block device id library - headers and static libraries
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The blkid library which allows system programs like fsck and
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mount to quickly and easily find block devices by filesystem UUID and
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LABEL. This allows system administrators to avoid specifiying
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filesystems by hard-coded device names, but via a logical naming
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system instead.
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.
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This package contains the development environment for the blkid library.
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Package: e2fsprogs-bf
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Section: devel
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Priority: extra
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@ -91,12 +117,12 @@ Description: A stripped-down versions of e2fsprogs, for debian-installer
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Package: e2fsprogs
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Essential: yes
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Pre-Depends: ${shlibs:Depends}
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Depends: ${misc:Depends}
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Depends: ${misc:Depends}, libblkid
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Suggests: gpart, parted, e2fsck-static
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Conflicts: e2fslibsg, dump (<< 0.4b4-4), quota (<< 1.55-8.1)
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Provides: libcomerr2, libss2, libext2fs2, libe2p2, libuuid1
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Architecture: any
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Description: The EXT2 file system utilities and libraries.
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Description: The EXT2 file system utilities and libraries
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EXT2 stands for "Extended Filesystem", version 2. It's the main
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filesystem type used for hard disks on Debian and other Linux systems.
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.
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@ -111,7 +137,7 @@ Suggests: doc-base
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Provides: ext2fs-dev, e2p-dev
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Conflicts: e2fsprogs (<< 1.10-6)
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Architecture: any
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Description: The headers and static libraries for ext2fs-aware tools-development.
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Description: The headers and static libraries for ext2fs-aware tools-development
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EXT2FS stands for "Extended Filesystem", version 2. It's the filesystem
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type used for hard disks on Debian and other Linux systems.
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.
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@ -1,3 +1,11 @@
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2003-03-16 Theodore Ts'o <tytso@mit.edu>
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* Makefile.in (DLOPEN_LIB): Link in the libdl library if it is
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present on the system.
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* debugfs.c (main): Call ss_get_readline() to attempt to pull in
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the readline library.
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2003-03-06 Theodore Tso <tytso@mit.edu>
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* debugfs.c (do_open_filesys, do_show_super_stats),
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@ -8,6 +8,7 @@ VPATH = @srcdir@
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top_builddir = ..
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my_dir = debugfs
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INSTALL = @INSTALL@
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DLOPEN_LIB = @DLOPEN_LIB@
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@MCONFIG@
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@ -24,7 +25,8 @@ SRCS= debug_cmds.c $(srcdir)/debugfs.c $(srcdir)/util.c $(srcdir)/ls.c \
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$(srcdir)/dump.c $(srcdir)/setsuper.c ${srcdir}/logdump.c \
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$(srcdir)/htree.c
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LIBS= $(LIBEXT2FS) $(LIBE2P) $(LIBSS) $(LIBCOM_ERR) $(LIBBLKID) $(LIBUUID)
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LIBS= $(LIBEXT2FS) $(LIBE2P) $(LIBSS) $(LIBCOM_ERR) $(LIBBLKID) \
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$(LIBUUID) $(DLOPEN_LIB)
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DEPLIBS= $(LIBEXT2FS) $(LIBE2P) $(LIBSS) $(LIBCOM_ERR) $(LIBBLKID) $(DEPLIBUUID)
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.c.o:
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@ -1576,6 +1576,7 @@ int main(int argc, char **argv)
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ss_perror(sci_idx, retval, "creating invocation");
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exit(1);
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}
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ss_get_readline(sci_idx);
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(void) ss_add_request_table (sci_idx, &ss_std_requests, 1, &retval);
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if (retval) {
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@ -1,3 +1,23 @@
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2003-03-16 Theodore Ts'o <tytso@mit.edu>
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* Makefile.in (DLOPEN_LIB): Include the dlopen library if it is
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present on shared libraries.
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* ss_internal.h: Add pointers to dynamic readline functions in the
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ss_info data structure.
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* listen.c (ss_listen): Use readline instead of fgets if the
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readline library is present. Define helper functions to
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provide command completion from the ss request tables.
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* invocation.c (ss_create_invocation, ss_delete_invocation): If
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HAVE_DLOPEN is defined, call ss_get_readline() to automatically
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try to load the readline library.
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* get_readline.c (ss_get_readline): New function which uses dlopen()
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to dynamically load the readline library if it is present
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on the system.
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2002-11-09 Theodore Ts'o <tytso@mit.edu>
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* Release of E2fsprogs 1.32
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@ -8,6 +8,7 @@ VPATH = @srcdir@
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top_builddir = ../..
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my_dir = lib/ss
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INSTALL = @INSTALL@
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DLOPEN_LIB = @DLOPEN_LIB@
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@MCONFIG@
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@ -20,7 +21,7 @@ DLL_GOTSIZE = 0x1000
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DLL_VERSION = 1.0
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DLL_IMAGE = libss
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DLL_STUB = libss
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DLL_LIBS = -L../.. -lcom_err
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DLL_LIBS = -L../.. -lcom_err $(DLOPEN_LIB)
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DLL_MYDIR = ss
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DLL_INSTALL_DIR = $(root_libdir)
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@ -29,7 +30,7 @@ ELF_SO_VERSION = 2
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ELF_IMAGE = libss
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ELF_MYDIR = ss
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ELF_INSTALL_DIR = $(root_libdir)
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ELF_OTHER_LIBS = -L../.. -lcom_err
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ELF_OTHER_LIBS = -L../.. -lcom_err $(DLOPEN_LIB)
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BSDLIB_VERSION = 1.0
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BSDLIB_IMAGE = libss
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@ -51,7 +52,7 @@ XTRA_CFLAGS=-DPOSIX_SIGNALS -I$(srcdir)/../et
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@CHECKER_CMT@ $(CC) $(ALL_CFLAGS) -checker -g -o checker/$*.o -c $<
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@DLL_CMT@ (export JUMP_DIR=`pwd`/jump; $(CC) -B$(JUMP_PREFIX) \
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@DLL_CMT@ $(ALL_CFLAGS) -o jump/$*.o -c $<)
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@ELF_CMT@ $(CC) $(ALL_CFLAGS) -fPIC -o elfshared/$*.o -c $<
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@ELF_CMT@ $(CC) $(ALL_CFLAGS) -DSHARED_ELF_LIB -fPIC -o elfshared/$*.o -c $<
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@BSDLIB_CMT@ $(CC) $(ALL_CFLAGS) -fpic -o pic/$*.o -c $<
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# for the library
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@ -65,13 +66,13 @@ OBJS= ss_err.o \
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invocation.o help.o \
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execute_cmd.o listen.o parse.o error.o prompt.o \
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request_tbl.o list_rqs.o pager.o requests.o \
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data.o
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data.o get_readline.o
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SRCS= $(srcdir)/invocation.c $(srcdir)/help.c \
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$(srcdir)/execute_cmd.c $(srcdir)/listen.c $(srcdir)/parse.c \
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$(srcdir)/error.c $(srcdir)/prompt.c $(srcdir)/request_tbl.c \
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$(srcdir)/list_rqs.c $(srcdir)/pager.c $(srcdir)/requests.c \
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$(srcdir)/data.c
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$(srcdir)/data.c $(srcdir)/get_readline.c
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all:: mk_cmds
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@ -0,0 +1,65 @@
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/*
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* Copyright 2003 by MIT Student Information Processing Board
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose is hereby granted, provided that
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* the names of M.I.T. and the M.I.T. S.I.P.B. not be used in
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* advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. M.I.T. and the
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* M.I.T. S.I.P.B. make no representations about the suitability of
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* this software for any purpose. It is provided "as is" without
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* express or implied warranty.
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*/
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#ifdef HAS_STDLIB_H
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#include <stdlib.h>
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#endif
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#include "ss_internal.h"
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#define size sizeof(ss_data *)
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#ifdef HAVE_DLOPEN
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#include <dlfcn.h>
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#endif
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static void ss_release_readline(ss_data *info)
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{
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#ifdef HAVE_DLOPEN
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if (!info->readline_handle)
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return;
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info->readline = 0;
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info->add_history = 0;
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info->redisplay = 0;
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info->rl_completion_matches = 0;
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dlclose(info->readline_handle);
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info->readline_handle = 0;
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#endif
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}
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void ss_get_readline(int sci_idx)
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{
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#ifdef HAVE_DLOPEN
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void *handle;
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ss_data *info = ss_info(sci_idx);
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const char **t;
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char **(**completion_func)(const char *, int, int);
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if (info->readline_handle ||
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getenv("SS_NO_READLINE") ||
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((handle = dlopen("libreadline.so", RTLD_NOW)) == NULL))
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return;
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info->readline_handle = handle;
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info->readline = dlsym(handle, "readline");
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info->add_history = dlsym(handle, "add_history");
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info->redisplay = dlsym(handle, "rl_forced_update_display");
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info->rl_completion_matches = dlsym(handle, "rl_completion_matches");
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if ((t = dlsym(handle, "rl_readline_name")) != NULL)
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*t = info->subsystem_name;
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if ((completion_func =
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dlsym(handle, "rl_attempted_completion_function")) != NULL)
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*completion_func = ss_rl_completion;
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info->readline_shutdown = ss_release_readline;
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#endif
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}
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@ -16,6 +16,9 @@
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#endif
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#include "ss_internal.h"
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#define size sizeof(ss_data *)
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#ifdef HAVE_DLOPEN
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#include <dlfcn.h>
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#endif
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int ss_create_invocation(subsystem_name, version_string, info_ptr,
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request_table_ptr, code_ptr)
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@ -27,6 +30,7 @@ int ss_create_invocation(subsystem_name, version_string, info_ptr,
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register int sci_idx;
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register ss_data *new_table;
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register ss_data **table;
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void *handle;
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*code_ptr = 0;
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table = _ss_table;
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@ -66,7 +70,16 @@ int ss_create_invocation(subsystem_name, version_string, info_ptr,
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(ss_request_table **) calloc(2, sizeof(ss_request_table *));
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*(new_table->rqt_tables) = request_table_ptr;
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*(new_table->rqt_tables+1) = (ss_request_table *) NULL;
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new_table->readline_handle = 0;
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new_table->readline = 0;
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new_table->add_history = 0;
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new_table->redisplay = 0;
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new_table->rl_completion_matches = 0;
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_ss_table = table;
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#if defined(HAVE_DLOPEN) && defined(SHARED_ELF_LIB)
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ss_get_readline(sci_idx);
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#endif
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return(sci_idx);
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}
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@ -83,5 +96,9 @@ ss_delete_invocation(sci_idx)
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while(t->info_dirs[0] != (char *)NULL)
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ss_delete_info_dir(sci_idx, t->info_dirs[0], &ignored_code);
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free((char *)t->info_dirs);
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#if defined(HAVE_DLOPEN) && defined(SHARED_ELF_LIB)
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if (t->readline_shutdown)
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(*t->readline_shutdown)(t);
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#endif
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free((char *)t);
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}
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|
|
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101
lib/ss/listen.c
101
lib/ss/listen.c
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@ -48,8 +48,12 @@ static sigret_t print_prompt(int sig)
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}
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}
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#endif
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(void) fputs(current_info->prompt, stdout);
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(void) fflush(stdout);
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if (current_info->redisplay)
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(*current_info->redisplay)();
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else {
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(void) fputs(current_info->prompt, stdout);
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(void) fflush(stdout);
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}
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}
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static sigret_t listen_int_handler(int sig)
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|
@ -73,6 +77,7 @@ int ss_listen (int sci_idx)
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int code;
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jmp_buf old_jmpb;
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ss_data *old_info = current_info;
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char *line;
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current_info = info = ss_info(sci_idx);
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sig_cont = (sigret_t (*)(int)) 0;
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|
@ -93,29 +98,40 @@ int ss_listen (int sci_idx)
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(void) sigsetmask(mask);
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#endif
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while(!info->abort) {
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print_prompt(0);
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old_sig_cont = sig_cont;
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sig_cont = signal(SIGCONT, print_prompt);
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if (sig_cont == print_prompt)
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sig_cont = old_sig_cont;
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if (fgets(input, BUFSIZ, stdin) != input) {
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code = SS_ET_EOF;
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(void) signal(SIGCONT, sig_cont);
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goto egress;
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}
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input[BUFSIZ-1] = 0;
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if (info->readline) {
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line = (*info->readline)(current_info->prompt);
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} else {
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print_prompt(0);
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if (fgets(input, BUFSIZ, stdin) == input)
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line = input;
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else
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line = NULL;
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cp = strchr(input, '\n');
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input[BUFSIZ-1] = 0;
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}
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if (line == NULL) {
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code = SS_ET_EOF;
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(void) signal(SIGCONT, sig_cont);
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goto egress;
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}
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cp = strchr(line, '\n');
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if (cp) {
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*cp = '\0';
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if (cp == input)
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if (cp == line)
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continue;
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}
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(void) signal(SIGCONT, sig_cont);
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if (info->add_history)
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(*info->add_history)(line);
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code = ss_execute_line (sci_idx, input);
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code = ss_execute_line (sci_idx, line);
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if (code == SS_ET_COMMAND_NOT_FOUND) {
|
||||
register char *c = input;
|
||||
register char *c = line;
|
||||
while (*c == ' ' || *c == '\t')
|
||||
c++;
|
||||
cp = strchr (c, ' ');
|
||||
|
|
@ -128,6 +144,8 @@ int ss_listen (int sci_idx)
|
|||
"Unknown request \"%s\". Type \"?\" for a request list.",
|
||||
c);
|
||||
}
|
||||
if (info->readline)
|
||||
free(line);
|
||||
}
|
||||
code = 0;
|
||||
egress:
|
||||
|
|
@ -148,3 +166,60 @@ void ss_quit(int argc, const char * const *argv, int sci_idx, pointer infop)
|
|||
{
|
||||
ss_abort_subsystem(sci_idx, 0);
|
||||
}
|
||||
|
||||
#ifdef HAVE_DLOPEN
|
||||
#define get_request(tbl,idx) ((tbl) -> requests + (idx))
|
||||
|
||||
static char *cmd_generator(const char *text, int state)
|
||||
{
|
||||
static int len;
|
||||
static ss_request_table **rqtbl;
|
||||
static int curr_rqt;
|
||||
static char const * const * name;
|
||||
ss_request_entry *request;
|
||||
char *ret;
|
||||
|
||||
if (state == 0) {
|
||||
len = strlen(text);
|
||||
rqtbl = current_info->rqt_tables;
|
||||
if (!rqtbl || !*rqtbl)
|
||||
return 0;
|
||||
curr_rqt = 0;
|
||||
name = 0;
|
||||
}
|
||||
|
||||
while (1) {
|
||||
if (!name || !*name) {
|
||||
request = get_request(*rqtbl, curr_rqt++);
|
||||
name = request->command_names;
|
||||
if (!name) {
|
||||
rqtbl++;
|
||||
if (*rqtbl) {
|
||||
curr_rqt = 0;
|
||||
continue;
|
||||
} else
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (strncmp(*name, text, len) == 0) {
|
||||
ret = malloc(strlen(*name)+1);
|
||||
if (ret)
|
||||
strcpy(ret, *name);
|
||||
name++;
|
||||
return ret;
|
||||
}
|
||||
name++;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
char **ss_rl_completion(const char *text, int start, int end)
|
||||
{
|
||||
if ((start == 0) && current_info->rl_completion_matches)
|
||||
return (*current_info->rl_completion_matches)
|
||||
(text, cmd_generator);
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
|
|||
|
|
@ -85,6 +85,7 @@ void ss_unimplemented(int argc, const char * const *argv,
|
|||
int sci_idx, void *infop);
|
||||
void ss_set_prompt(int sci_idx, char *new_prompt);
|
||||
char *ss_get_prompt(int sci_idx);
|
||||
void ss_get_readline(int sci_idx);
|
||||
#else
|
||||
char *ss_name();
|
||||
void ss_error ();
|
||||
|
|
@ -103,6 +104,7 @@ void ss_subsystem_version();
|
|||
void ss_unimplemented();
|
||||
void ss_set_prompt;
|
||||
char *ss_get_prompt;
|
||||
void ss_get_readline();
|
||||
#endif
|
||||
extern ss_request_table ss_std_requests;
|
||||
#endif /* _ss_h */
|
||||
|
|
|
|||
|
|
@ -95,6 +95,16 @@ typedef struct _ss_data { /* init values */
|
|||
unsigned int escape_disabled : 1,
|
||||
abbrevs_disabled : 1;
|
||||
} flags;
|
||||
/*
|
||||
* Dynamic usage of readline library if present
|
||||
*/
|
||||
void *readline_handle;
|
||||
void (*readline_shutdown)(struct _ss_data *info);
|
||||
char *(*readline)(const char *);
|
||||
void (*add_history)(const char *);
|
||||
void (*redisplay)();
|
||||
char **(*rl_completion_matches)(const char *,
|
||||
char *(*completer)(const char *, int));
|
||||
/* to get out */
|
||||
int abort; /* exit subsystem */
|
||||
int exit_status;
|
||||
|
|
@ -116,6 +126,7 @@ void ss_page_stdin(NOARGS);
|
|||
void ss_list_requests PROTOTYPE((int, char const * const *, int, pointer));
|
||||
int ss_execute_command PROTOTYPE((int sci_idx, char *argv[]));
|
||||
int ss_pager_create(NOARGS);
|
||||
char **ss_rl_completion(const char *text, int start, int end);
|
||||
|
||||
extern ss_data **_ss_table;
|
||||
extern char *ss_et_msgs[];
|
||||
|
|
|
|||
Loading…
Reference in New Issue