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authorDouglas Gilbert <dgilbert@interlog.com>2007-06-27 03:50:28 +0000
committerDouglas Gilbert <dgilbert@interlog.com>2007-06-27 03:50:28 +0000
commit130627841138672bf26e9b4b5a1f70a240e910a6 (patch)
treefc8ffb884c15f89eb09f5ea904b29d15a9de6de1 /archive
parent543a9ec553506a206d3191503ed6a24ac7721101 (diff)
downloadsg3_utils-130627841138672bf26e9b4b5a1f70a240e910a6.tar.gz
To prepare to load sg3_utils-1.23 into trunk/, perform 6 renames.
* trunk//debian/libsgutils1-dev.dirs: Renamed from trunk//debian/libsgutils1-0-dev.dirs. * trunk//debian/libsgutils1-dev.install: Renamed from trunk//debian/libsgutils1-0-dev.install. * trunk//debian/libsgutils1.dirs: Renamed from trunk//debian/libsgutils1-0.dirs. * trunk//debian/libsgutils1.install: Renamed from trunk//debian/libsgutils1-0.install. * trunk//archive/llseek.c: Renamed from trunk//llseek.c. * trunk//archive/llseek.h: Renamed from trunk//llseek.h. git-svn-id: https://svn.bingwo.ca/repos/sg3_utils/trunk@73 6180dd3e-e324-4e3e-922d-17de1ae2f315
Diffstat (limited to 'archive')
-rw-r--r--archive/llseek.c121
-rw-r--r--archive/llseek.h14
2 files changed, 135 insertions, 0 deletions
diff --git a/archive/llseek.c b/archive/llseek.c
new file mode 100644
index 00000000..d07c1807
--- /dev/null
+++ b/archive/llseek.c
@@ -0,0 +1,121 @@
+/*
+ * llseek.c -- stub calling the llseek system call
+ *
+ * Copyright (C) 1994 Remy Card. This file may be redistributed
+ * under the terms of the GNU Public License.
+ *
+ * This file is borrowed from the util-linux-2.11z tarball's implementation
+ * of fdisk. It allows seeks to 64 bit offsets, if supported.
+ * Changed "ext2_" prefix to "llse".
+ */
+#define _XOPEN_SOURCE 500
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <unistd.h>
+
+#if defined(__GNUC__) || defined(HAS_LONG_LONG)
+typedef long long llse_loff_t;
+#else
+typedef long llse_loff_t;
+#endif
+
+extern llse_loff_t llse_llseek (unsigned int, llse_loff_t, unsigned int);
+
+#ifdef __linux__
+
+#ifdef HAVE_LLSEEK
+#include <syscall.h>
+
+#else /* HAVE_LLSEEK */
+
+#if defined(__alpha__) || defined(__ia64__) || defined(__s390x__)
+
+#define my_llseek lseek
+
+#else
+#include <linux/unistd.h> /* for __NR__llseek */
+
+static int _llseek (unsigned int, unsigned long,
+ unsigned long, llse_loff_t *, unsigned int);
+
+#ifdef __NR__llseek
+
+static _syscall5(int,_llseek,unsigned int,fd,unsigned long,offset_high,
+ unsigned long, offset_low,llse_loff_t *,result,
+ unsigned int, origin)
+
+#else
+
+/* no __NR__llseek on compilation machine - might give it explicitly */
+static int _llseek (unsigned int fd, unsigned long oh,
+ unsigned long ol, llse_loff_t *result,
+ unsigned int origin) {
+ errno = ENOSYS;
+ return -1;
+}
+
+#endif
+
+static llse_loff_t my_llseek (unsigned int fd, llse_loff_t offset,
+ unsigned int origin)
+{
+ llse_loff_t result;
+ int retval;
+
+ retval = _llseek (fd, ((unsigned long long) offset) >> 32,
+ ((unsigned long long) offset) & 0xffffffff,
+ &result, origin);
+ return (retval == -1 ? (llse_loff_t) retval : result);
+}
+
+#endif /* __alpha__ */
+
+#endif /* HAVE_LLSEEK */
+
+llse_loff_t llse_llseek (unsigned int fd, llse_loff_t offset,
+ unsigned int origin)
+{
+ llse_loff_t result;
+ static int do_compat = 0;
+
+ if (!do_compat) {
+ result = my_llseek (fd, offset, origin);
+ if (!(result == -1 && errno == ENOSYS))
+ return result;
+
+ /*
+ * Just in case this code runs on top of an old kernel
+ * which does not support the llseek system call
+ */
+ do_compat = 1;
+ /*
+ * Now try ordinary lseek.
+ */
+ }
+
+ if ((sizeof(off_t) >= sizeof(llse_loff_t)) ||
+ (offset < ((llse_loff_t) 1 << ((sizeof(off_t)*8) -1))))
+ return lseek(fd, (off_t) offset, origin);
+
+ errno = EINVAL;
+ return -1;
+}
+
+#else /* !linux */
+
+llse_loff_t llse_llseek (unsigned int fd, llse_loff_t offset,
+ unsigned int origin)
+{
+ if ((sizeof(off_t) < sizeof(llse_loff_t)) &&
+ (offset >= ((llse_loff_t) 1 << ((sizeof(off_t)*8) -1)))) {
+ errno = EINVAL;
+ return -1;
+ }
+ return lseek (fd, (off_t) offset, origin);
+}
+
+#endif /* linux */
+
diff --git a/archive/llseek.h b/archive/llseek.h
new file mode 100644
index 00000000..2f6aef0f
--- /dev/null
+++ b/archive/llseek.h
@@ -0,0 +1,14 @@
+#ifndef LLSEEK_H
+#define LLSEEK_H
+
+#if defined(__GNUC__) || defined(HAS_LONG_LONG)
+typedef long long llse_loff_t;
+#else
+typedef long llse_loff_t;
+#endif
+
+extern llse_loff_t llse_llseek(unsigned int fd,
+ llse_loff_t offset,
+ unsigned int origin);
+
+#endif