Add in a pread/pwrite test

test/unistd/.cvsignore

@@ -5,3 +5,4 @@ vfork_glibc
 getopt
 getopt_long
 getcwd
+preadwrite

test/unistd/Makefile

@@ -21,7 +21,7 @@ include $(TESTDIR)/Rules.mak
 
 
 
-TARGETS=fork fork_glibc vfork vfork_glibc getcwd getopt getopt_long 
+TARGETS=fork fork_glibc vfork vfork_glibc getcwd getopt getopt_long preadwrite 
 all: $(TARGETS)
 
 getcwd: getcwd.c Makefile $(TESTDIR)/Config $(TESTDIR)/Rules.mak $(CC)
@@ -93,6 +93,13 @@ getopt_long: getopt_long.c Makefile $(TESTDIR)/Config $(TESTDIR)/Rules.mak $(CC)
 	./$@ --add XXX --delete YYY --verbose
 	-@ echo " "
 
+preadwrite: preadwrite.c Makefile $(TESTDIR)/Config $(TESTDIR)/Rules.mak $(CC)
+	$(CC) $(CFLAGS) -c $< -o $@.o
+	$(CC) $(LDFLAGS) $@.o -o $@ $(EXTRA_LIBS)
+	$(STRIPTOOL) -x -R .note -R .comment $@
+	./$@
+	-@ echo " "
+
 clean:
 	rm -f *.[oa] *~ core $(TARGETS)
 

test/unistd/preadwrite.c

@@ -0,0 +1,145 @@
+/* Tests for pread and pwrite.
+   Copyright (C) 1998, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <search.h>
+#include <errno.h>
+#include <error.h>
+#include <string.h>
+#include <unistd.h>
+
+#define TESTFILE_NAME "CRAP.XXXXXX"
+#define STRINGIFY(s) STRINGIFY2 (s)
+#define STRINGIFY2(s) #s
+
+/* These are for the temporary file we generate.  */
+char *name;
+int fd;
+
+
+/* Test the 32-bit versions first.  */
+#define PREAD pread
+#define PWRITE pwrite
+
+int test(int argc, char *argv[])
+{
+    char buf[1000];
+    char res[1000];
+    int i;
+
+    memset (buf, '\0', sizeof (buf));
+    memset (res, '\xff', sizeof (res));
+
+    if (write (fd, buf, sizeof (buf)) != sizeof (buf))
+	error (EXIT_FAILURE, errno, "during write");
+
+    for (i = 100; i < 200; ++i)
+	buf[i] = i;
+    if (PWRITE (fd, buf + 100, 100, 100) != 100)
+	error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
+
+    for (i = 450; i < 600; ++i)
+	buf[i] = i;
+    if (PWRITE (fd, buf + 450, 150, 450) != 150)
+	error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
+
+    if (PREAD (fd, res, sizeof (buf) - 50, 50) != sizeof (buf) - 50)
+	error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PREAD));
+
+    close (fd);
+    unlink (name);
+    return memcmp (buf + 50, res, sizeof (buf) - 50);
+}
+
+/* Test the 64-bit versions as well.  */
+#undef PREAD
+#undef PWRITE
+#define PREAD pread64
+#define PWRITE pwrite64
+
+
+int test64(int argc, char *argv[])
+{
+    char buf[1000];
+    char res[1000];
+    int i;
+
+    memset (buf, '\0', sizeof (buf));
+    memset (res, '\xff', sizeof (res));
+
+    if (write (fd, buf, sizeof (buf)) != sizeof (buf))
+	error (EXIT_FAILURE, errno, "during write");
+
+    for (i = 100; i < 200; ++i)
+	buf[i] = i;
+    if (PWRITE (fd, buf + 100, 100, 100) != 100)
+	error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
+
+    for (i = 450; i < 600; ++i)
+	buf[i] = i;
+    if (PWRITE (fd, buf + 450, 150, 450) != 150)
+	error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
+
+    if (PREAD (fd, res, sizeof (buf) - 50, 50) != sizeof (buf) - 50)
+	error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PREAD));
+
+    close (fd);
+    unlink (name);
+    return memcmp (buf + 50, res, sizeof (buf) - 50);
+}
+
+void prepare(void)
+{
+    if (!name) {
+	name = malloc (BUFSIZ);
+	if (name == NULL)
+	    error (EXIT_FAILURE, errno, "cannot allocate file name");
+    }
+    strncpy(name, TESTFILE_NAME, BUFSIZ);
+
+    /* Open our test file.   */
+    fd = mkstemp (name);
+    if (fd == -1)
+	error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
+}
+
+int main (int argc, char **argv)
+{
+    int result = 0;
+
+    prepare();
+    result+=test(argc, argv);
+    if (result) { 
+	fprintf(stderr, "pread/pwrite test failed.\n");
+	return(EXIT_FAILURE);
+    }
+    fprintf(stderr, "pread/pwrite test successful.\n");
+
+    prepare();
+    result+=test64(argc, argv);
+    if (result) { 
+	fprintf(stderr, "pread64/pwrite64 test failed.\n");
+	return(EXIT_FAILURE);
+    }
+    fprintf(stderr, "pread64/pwrite64 test successful.\n");
+    return(EXIT_SUCCESS);
+}