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-rw-r--r--source4/lib/replace/readline.c45
-rw-r--r--source4/lib/util/config.mk1
-rw-r--r--source4/lib/util/select.c169
3 files changed, 45 insertions, 170 deletions
diff --git a/source4/lib/replace/readline.c b/source4/lib/replace/readline.c
index 52f45eb759..78febf5000 100644
--- a/source4/lib/replace/readline.c
+++ b/source4/lib/replace/readline.c
@@ -25,6 +25,51 @@
#include <unistd.h>
#include "system/readline.h"
+/*******************************************************************
+ Similar to sys_select() but catch EINTR and continue.
+ This is what sys_select() used to do in Samba.
+********************************************************************/
+
+int sys_select_intr(int maxfd, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *tval)
+{
+ int ret;
+ fd_set *readfds2, readfds_buf, *writefds2, writefds_buf, *errorfds2, errorfds_buf;
+ struct timeval tval2, *ptval;
+
+ readfds2 = (readfds ? &readfds_buf : NULL);
+ writefds2 = (writefds ? &writefds_buf : NULL);
+ errorfds2 = (errorfds ? &errorfds_buf : NULL);
+ ptval = (tval ? &tval2 : NULL);
+
+ do {
+ if (readfds)
+ readfds_buf = *readfds;
+ if (writefds)
+ writefds_buf = *writefds;
+ if (errorfds)
+ errorfds_buf = *errorfds;
+ if (tval)
+ tval2 = *tval;
+
+ /* We must use select and not sys_select here. If we use
+ sys_select we'd lose the fact a signal occurred when sys_select
+ read a byte from the pipe. Fix from Mark Weaver
+ <mark-clist@npsl.co.uk>
+ */
+
+ ret = select(maxfd, readfds2, writefds2, errorfds2, ptval);
+ } while (ret == -1 && errno == EINTR);
+
+ if (readfds)
+ *readfds = readfds_buf;
+ if (writefds)
+ *writefds = writefds_buf;
+ if (errorfds)
+ *errorfds = errorfds_buf;
+
+ return ret;
+}
+
/****************************************************************************
Display the prompt and wait for input. Call callback() regularly
****************************************************************************/
diff --git a/source4/lib/util/config.mk b/source4/lib/util/config.mk
index 4e00e2d7e2..312653c19f 100644
--- a/source4/lib/util/config.mk
+++ b/source4/lib/util/config.mk
@@ -25,7 +25,6 @@ OBJ_FILES = xfile.o \
substitute.o \
fsusage.o \
ms_fnmatch.o \
- select.o \
mutex.o \
idtree.o \
module.o
diff --git a/source4/lib/util/select.c b/source4/lib/util/select.c
deleted file mode 100644
index 4f906f2454..0000000000
--- a/source4/lib/util/select.c
+++ /dev/null
@@ -1,169 +0,0 @@
-/*
- Unix SMB/Netbios implementation.
- Version 3.0
- Samba select/poll implementation
- Copyright (C) Andrew Tridgell 1992-1998
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include "includes.h"
-#include "system/filesys.h"
-
-/* This is here because it allows us to avoid a nasty race in signal handling.
- We need to guarantee that when we get a signal we get out of a select immediately
- but doing that involves a race condition. We can avoid the race by getting the
- signal handler to write to a pipe that is in the select/poll list
-
- This means all Samba signal handlers should call sys_select_signal().
-*/
-
-static pid_t initialised;
-static int select_pipe[2];
-static volatile unsigned pipe_written, pipe_read;
-
-/*******************************************************************
- Call this from all Samba signal handlers if you want to avoid a
- nasty signal race condition.
-********************************************************************/
-
-void sys_select_signal(void)
-{
- char c = 1;
- if (!initialised) return;
-
- if (pipe_written > pipe_read+256) return;
-
- if (write(select_pipe[1], &c, 1) == 1) pipe_written++;
-}
-
-/*******************************************************************
- Like select() but avoids the signal race using a pipe
- it also guarantees that fds on return only ever contains bits set
- for file descriptors that were readable.
-********************************************************************/
-
-int sys_select(int maxfd, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *tval)
-{
- int ret, saved_errno;
- fd_set *readfds2, readfds_buf;
-
- if (initialised != getpid()) {
- pipe(select_pipe);
-
- /*
- * These next two lines seem to fix a bug with the Linux
- * 2.0.x kernel (and probably other UNIXes as well) where
- * the one byte read below can block even though the
- * select returned that there is data in the pipe and
- * the pipe_written variable was incremented. Thanks to
- * HP for finding this one. JRA.
- */
-
- if(set_blocking(select_pipe[0],0)==-1)
- smb_panic("select_pipe[0]: O_NONBLOCK failed.\n");
- if(set_blocking(select_pipe[1],0)==-1)
- smb_panic("select_pipe[1]: O_NONBLOCK failed.\n");
-
- initialised = getpid();
- }
-
- maxfd = MAX(select_pipe[0]+1, maxfd);
-
- /* If readfds is NULL we need to provide our own set. */
- if (readfds) {
- readfds2 = readfds;
- } else {
- readfds2 = &readfds_buf;
- FD_ZERO(readfds2);
- }
- FD_SET(select_pipe[0], readfds2);
-
- errno = 0;
- ret = select(maxfd,readfds2,writefds,errorfds,tval);
-
- if (ret <= 0) {
- FD_ZERO(readfds2);
- if (writefds)
- FD_ZERO(writefds);
- if (errorfds)
- FD_ZERO(errorfds);
- } else if (FD_ISSET(select_pipe[0], readfds2)) {
- char c;
- saved_errno = errno;
- if (read(select_pipe[0], &c, 1) == 1) {
- pipe_read++;
- /* Mark Weaver <mark-clist@npsl.co.uk> pointed out a critical
- fix to ensure we don't lose signals. We must always
- return -1 when the select pipe is set, otherwise if another
- fd is also ready (so ret == 2) then we used to eat the
- byte in the pipe and lose the signal. JRA.
- */
- ret = -1;
- errno = EINTR;
- } else {
- FD_CLR(select_pipe[0], readfds2);
- ret--;
- errno = saved_errno;
- }
- }
-
- return ret;
-}
-
-/*******************************************************************
- Similar to sys_select() but catch EINTR and continue.
- This is what sys_select() used to do in Samba.
-********************************************************************/
-
-int sys_select_intr(int maxfd, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *tval)
-{
- int ret;
- fd_set *readfds2, readfds_buf, *writefds2, writefds_buf, *errorfds2, errorfds_buf;
- struct timeval tval2, *ptval;
-
- readfds2 = (readfds ? &readfds_buf : NULL);
- writefds2 = (writefds ? &writefds_buf : NULL);
- errorfds2 = (errorfds ? &errorfds_buf : NULL);
- ptval = (tval ? &tval2 : NULL);
-
- do {
- if (readfds)
- readfds_buf = *readfds;
- if (writefds)
- writefds_buf = *writefds;
- if (errorfds)
- errorfds_buf = *errorfds;
- if (tval)
- tval2 = *tval;
-
- /* We must use select and not sys_select here. If we use
- sys_select we'd lose the fact a signal occurred when sys_select
- read a byte from the pipe. Fix from Mark Weaver
- <mark-clist@npsl.co.uk>
- */
-
- ret = select(maxfd, readfds2, writefds2, errorfds2, ptval);
- } while (ret == -1 && errno == EINTR);
-
- if (readfds)
- *readfds = readfds_buf;
- if (writefds)
- *writefds = writefds_buf;
- if (errorfds)
- *errorfds = errorfds_buf;
-
- return ret;
-}
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