Remove internal copy of libpipeline.

* configure.ac: Remove --enable-socketpair-pipe and
  --with-external-pipeline options.  Remove INTERNAL_PIPELINE
  Automake conditional.  Check for libpipeline unconditionally.
* docs/INSTALL.quick: Mention the need to install libpipeline.
* gnulib: Remove strsignal and sys_select modules.
* lib/Makefile.am (libman_la_SOURCES): Never add pipeline.c or
  pipeline.h.
* lib/pipeline.c, lib/pipeline.h: Remove.
* m4/man-socketpair.m4: Remove.
* NEWS: Document this.  Bump to 2.6.0.

1 files changed, 0 insertions, 116 deletions

diff --git a/m4/man-socketpair.m4 b/m4/man-socketpair.m4
deleted file mode 100644
index 68749c6c..00000000
--- a/m4/man-socketpair.m4
+++ /dev/null
@@ -1,116 +0,0 @@
-# man-socketpair.m4 serial 1
-dnl
-dnl Check if the socketpair(2) system call can be used
-dnl and should be used as a fast replacement for pipe(2)
-dnl
-dnl Author: Werner Fink <werner@suse.de>, 2009
-
-AC_DEFUN([MAN_SOCKETPAIR_PIPE],
-[ AC_MSG_CHECKING([if socketpair(2) can be used as fast replacement for pipe(2)])
-  AC_CACHE_VAL(man_cv_socketpair_pipe, [
-    AC_TRY_RUN([
-#include <netdb.h>
-#include <netinet/in.h>
-#include <signal.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-#ifndef SHUT_RD
-#	define SHUT_RD	0
-#endif
-#ifndef SHUT_WR
-#	define SHUT_WR	1
-#endif
-
-static void sigpipe(int sig)
-{
-	_exit(0);
-}
-
-int main()
-{
-	const char test[] = "May use socketpair(2) instead of pipe(2)\n";
-	char buf[256];
-	int sfd[2], s;
-	pid_t pid;
-	if (socketpair(AF_UNIX,SOCK_STREAM,0,sfd) < 0)
-		return 1;
-	if (shutdown(sfd[1],SHUT_RD) < 0 || shutdown(sfd[0],SHUT_WR) < 0)
-		return 1;
-	if ((pid = fork()) < 0)
-		return 1;
-	if (pid) {
-		close(sfd[1]);
-		waitpid(-1,&s,0);
-		if (read(sfd[0],buf,sizeof(buf)) < 0)
-			return 1;
-	} else {
-		close(sfd[0]);
-		write(sfd[1],test,sizeof(test) - 1);
-		return 0;
-	}
-	close(sfd[0]);
-	signal(SIGPIPE, sigpipe);
-	if (socketpair(AF_UNIX,SOCK_STREAM,0,sfd) < 0)
-		return 1;
-	if (shutdown(sfd[1],SHUT_RD) < 0 || shutdown(sfd[0],SHUT_WR) < 0)
-		return 1;
-	close(sfd[0]);
-	write(sfd[1],test,sizeof(test) - 1);
-	return 1;
-}], [man_cv_socketpair_pipe=yes], [man_cv_socketpair_pipe=no], [man_cv_socketpair_pipe=no])
-  ])
-  AC_MSG_RESULT([$man_cv_socketpair_pipe])
-  if test "$man_cv_socketpair_pipe" = yes; then
-    AC_DEFINE(USE_SOCKETPAIR_PIPE, 1, [Define if socketpair(2) can be used as a fast replacement for pipe(2).])
-  fi
-])
-
-dnl
-dnl Check if shutdown(2) does not set mode for the socket descriptor
-dnl compare with ls -lL /proc/<pid>/fd/
-dnl
-AC_DEFUN([MAN_SOCKETPAIR_MODE],
-[ AC_MSG_CHECKING([if shutdown(2) does not set mode for the socket descriptor])
-  AC_CACHE_VAL(man_cv_socketpair_mode, [
-    AC_TRY_RUN([
-#include <netdb.h>
-#include <netinet/in.h>
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <unistd.h>
-#ifndef SHUT_RD
-#	define SHUT_RD	0
-#endif
-#ifndef SHUT_WR
-#	define SHUT_WR	1
-#endif
-
-int main()
-{
-	int sfd[2];
-	struct stat st[2];
-	if (socketpair(AF_UNIX,SOCK_STREAM,0,sfd) < 0)
-		return 1;
-	if (shutdown(sfd[1],SHUT_RD) < 0 || shutdown(sfd[0],SHUT_WR) < 0)
-		return 1;
-	if (fstat(sfd[0], &(st[0])) < 0 || fstat(sfd[1], &(st[1])) < 0)
-		return 1;
-	if ((st[0].st_mode & (S_IRUSR|S_IWUSR)) == S_IRUSR && (st[1].st_mode & (S_IRUSR|S_IWUSR)) == S_IWUSR)
-		return 1;
-	if (fchmod(sfd[0], S_IRUSR) < 0 || fchmod(sfd[1], S_IWUSR) < 0)
-		return 1;
-	if (fstat(sfd[0], &(st[0])) < 0 || fstat(sfd[1], &(st[1])) < 0)
-		return 1;
-	if ((st[0].st_mode & (S_IRUSR|S_IWUSR)) != S_IRUSR && (st[1].st_mode & (S_IRUSR|S_IWUSR)) != S_IWUSR)
-		return 1;
-	return 0;
-}], [man_cv_socketpair_mode=yes], [man_cv_socketpair_mode=no], [man_cv_socketpair_mode=no])
-  ])
-  AC_MSG_RESULT([$man_cv_socketpair_mode])
-  if test "$man_cv_socketpair_mode" = yes; then
-    AC_DEFINE(CORRECT_SOCKETPAIR_MODE, 1, [Define if shutdown(2) does not set modes for socket descriptor.])
-  fi
-])