2002-04-29 Jeff Johnston <jjohnstn@redhat.com>

        *  libc/include/sys/unistd.h (pread, pwrite): Added prototypes.
        *  libc/unix/Makefile.am: Add pread.c and pwrite.c.
        *  libc/sys/linux/Makefile.am: Add pread64.c and pwrite64.c.
        *  libc/sys/linux/Makefile.in: Regenerated.
        *  libc/unix/Makefile.in: Ditto.
        *  libc/sys/linux/pread64.c: New file.
        *  libc/sys/linux/pwrite64.c: Ditto.
        *  libc/unix/pread.c: Ditto.
        *  libc/unix/pwrite.c: Ditto.

4 files changed, 135 insertions, 10 deletions

diff --git a/newlib/libc/sys/linux/Makefile.am b/newlib/libc/sys/linux/Makefile.am
index 6b919da8c..dfac93b92 100644
--- a/newlib/libc/sys/linux/Makefile.am
+++ b/newlib/libc/sys/linux/Makefile.am
@@ -9,7 +9,7 @@ SUBLIBS = $(LINUX_MACH_LIB)
 
 LIB_SOURCES = \
 	brk.c getoptlong.c ids.c inode.c io.c io64.c linux.c mmap.c \
-	process.c realpath.c sched.c \
+	pread64.c process.c pwrite64.c realpath.c sched.c \
 	select.c signal.c siglongjmp.c socket.c sleep.c stack.c \
 	sysconf.c systat.c termios.c time.c \
 	usleep.c wait.c
diff --git a/newlib/libc/sys/linux/Makefile.in b/newlib/libc/sys/linux/Makefile.in
index e4f840bc6..cec25fa0e 100644
--- a/newlib/libc/sys/linux/Makefile.in
+++ b/newlib/libc/sys/linux/Makefile.in
@@ -98,7 +98,7 @@ SUBLIBS = $(LINUX_MACH_LIB)
 
 LIB_SOURCES = \
 	brk.c getoptlong.c ids.c inode.c io.c io64.c linux.c mmap.c \
-	process.c realpath.c sched.c \
+	pread64.c process.c pwrite64.c realpath.c sched.c \
 	select.c signal.c siglongjmp.c socket.c sleep.c stack.c \
 	sysconf.c systat.c termios.c time.c \
 	usleep.c wait.c
@@ -132,18 +132,19 @@ DEFS = @DEFS@ -I. -I$(srcdir)
 CPPFLAGS = @CPPFLAGS@
 LIBS = @LIBS@
 @USE_LIBTOOL_FALSE@lib_a_OBJECTS =  brk.o getoptlong.o ids.o inode.o \
-@USE_LIBTOOL_FALSE@io.o io64.o linux.o mmap.o process.o realpath.o \
-@USE_LIBTOOL_FALSE@sched.o select.o signal.o siglongjmp.o socket.o \
-@USE_LIBTOOL_FALSE@sleep.o stack.o sysconf.o systat.o termios.o time.o \
-@USE_LIBTOOL_FALSE@usleep.o wait.o
+@USE_LIBTOOL_FALSE@io.o io64.o linux.o mmap.o pread64.o process.o \
+@USE_LIBTOOL_FALSE@pwrite64.o realpath.o sched.o select.o signal.o \
+@USE_LIBTOOL_FALSE@siglongjmp.o socket.o sleep.o stack.o sysconf.o \
+@USE_LIBTOOL_FALSE@systat.o termios.o time.o usleep.o wait.o
 LTLIBRARIES =  $(noinst_LTLIBRARIES)
 
 @USE_LIBTOOL_TRUE@liblinux_la_DEPENDENCIES = 
 @USE_LIBTOOL_TRUE@liblinux_la_OBJECTS =  brk.lo getoptlong.lo ids.lo \
-@USE_LIBTOOL_TRUE@inode.lo io.lo io64.lo linux.lo mmap.lo process.lo \
-@USE_LIBTOOL_TRUE@realpath.lo sched.lo select.lo signal.lo \
-@USE_LIBTOOL_TRUE@siglongjmp.lo socket.lo sleep.lo stack.lo sysconf.lo \
-@USE_LIBTOOL_TRUE@systat.lo termios.lo time.lo usleep.lo wait.lo
+@USE_LIBTOOL_TRUE@inode.lo io.lo io64.lo linux.lo mmap.lo pread64.lo \
+@USE_LIBTOOL_TRUE@process.lo pwrite64.lo realpath.lo sched.lo select.lo \
+@USE_LIBTOOL_TRUE@signal.lo siglongjmp.lo socket.lo sleep.lo stack.lo \
+@USE_LIBTOOL_TRUE@sysconf.lo systat.lo termios.lo time.lo usleep.lo \
+@USE_LIBTOOL_TRUE@wait.lo
 CFLAGS = @CFLAGS@
 COMPILE = $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
 LTCOMPILE = $(LIBTOOL) --mode=compile $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
diff --git a/newlib/libc/sys/linux/pread64.c b/newlib/libc/sys/linux/pread64.c
new file mode 100644
index 000000000..c6d15f91d
--- /dev/null
+++ b/newlib/libc/sys/linux/pread64.c
@@ -0,0 +1,62 @@
+/*
+FUNCTION
+<<pread64>>---read a large file from specified position
+
+INDEX
+	pread64
+
+ANSI_SYNOPSIS
+	#include <unistd.h>
+	ssize_t pread64(int <[fd]>, void *<[buf]>, size_t <[n]>, loff_t <[off]>);
+
+TRAD_SYNOPSIS
+	#include <unistd.h>
+	ssize_t pread64(<[fd]>, <[buf]>, <[n]>, <[off]>)
+	int <[fd]>;
+	void *<[buf]>;
+	size_t <[n]>;
+	loff_t <[off]>;
+
+DESCRIPTION
+The <<pread64>> function is similar to <<pread>>.  The only difference is
+that it operates on large files and so takes a 64-bit offset.  Like <<pread>>>,
+the file position is unchanged by the function (i.e. the file position
+is the same before and after a call to <<pread>>).
+
+RETURNS
+<<pread64>> returns the number of bytes read or <<-1>> if failure occurred.
+
+PORTABILITY
+<<pread64>> is an EL/IX extension.
+
+Supporting OS subroutine required: <<read64>>, <<lseek64>>.
+*/
+
+#include <_ansi.h>
+#include <unistd.h>
+#include <reent.h>
+
+ssize_t
+_DEFUN (pread64, (fd, buf, n, off),
+     int fd _AND
+     _PTR buf _AND
+     size_t n _AND
+     loff_t off)
+{
+  loff_t cur_pos;
+  _READ_WRITE_RETURN_TYPE num_read;
+  
+  if ((cur_pos = lseek64 (fd, 0, SEEK_CUR)) == (loff_t)-1)
+    return -1;
+
+  if (lseek64 (fd, off, SEEK_SET) == (loff_t)-1)
+    return -1;
+
+  num_read = read64 (fd, buf, n);
+
+  if (lseek64 (fd, cur_pos, SEEK_SET) == (loff_t)-1)
+    return -1;
+
+  return (ssize_t)num_read;
+}
+
diff --git a/newlib/libc/sys/linux/pwrite64.c b/newlib/libc/sys/linux/pwrite64.c
new file mode 100644
index 000000000..fddd6d2da
--- /dev/null
+++ b/newlib/libc/sys/linux/pwrite64.c
@@ -0,0 +1,62 @@
+/*
+FUNCTION
+<<pwrite64>>---write a large file from specified position
+
+INDEX
+	pwrite64
+
+ANSI_SYNOPSIS
+	#include <unistd.h>
+	ssize_t pwrite64(int <[fd]>, void *<[buf]>, size_t <[n]>, loff_t <[off]>);
+
+TRAD_SYNOPSIS
+	#include <unistd.h>
+	ssize_t pwrite64(<[fd]>, <[buf]>, <[n]>, <[off]>)
+	int <[fd]>;
+	void *<[buf]>;
+	size_t <[n]>;
+	loff_t <[off]>;
+
+DESCRIPTION
+The <<pwrite64>> function is similar to <<pwrite>>.  The only difference is
+that it operates on large files and so takes a 64-bit offset.  Like <<pwrite>>>,
+the file position is unchanged by the function (i.e. the file position
+is the same before and after a call to <<pwrite>>).
+
+RETURNS
+<<pwrite64>> returns the number of bytes written or <<-1>> if failure occurred.
+
+PORTABILITY
+<<pwrite64>> is an EL/IX extension.
+
+Supporting OS subroutine required: <<write64>>, <<lseek64>>.
+*/
+
+#include <_ansi.h>
+#include <unistd.h>
+#include <reent.h>
+
+ssize_t
+_DEFUN (pwrite64, (fd, buf, n, off),
+     int fd _AND
+     _PTR buf _AND
+     size_t n _AND
+     loff_t off)
+{
+  loff_t cur_pos;
+  _READ_WRITE_RETURN_TYPE num_written;
+  
+  if ((cur_pos = lseek64 (fd, 0, SEEK_CUR)) == (loff_t)-1)
+    return -1;
+
+  if (lseek64 (fd, off, SEEK_SET) == (loff_t)-1)
+    return -1;
+
+  num_written = write64 (fd, buf, n);
+
+  if (lseek64 (fd, cur_pos, SEEK_SET) == (loff_t)-1)
+    return -1;
+
+  return (ssize_t)num_written;
+}
+