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(SOURCES): Add strtoul.
[gnulib.git]
/
lib
/
ftruncate.c
diff --git
a/lib/ftruncate.c
b/lib/ftruncate.c
index
17d263d
..
1272ee7
100644
(file)
--- a/
lib/ftruncate.c
+++ b/
lib/ftruncate.c
@@
-1,10
+1,15
@@
/* ftruncate emulations that work on some System V's.
/* ftruncate emulations that work on some System V's.
- This file is in the public domain. */
+ This file is in the public domain. */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <sys/types.h>
#include <fcntl.h>
#ifdef F_CHSIZE
#include <sys/types.h>
#include <fcntl.h>
#ifdef F_CHSIZE
+
int
ftruncate (fd, length)
int fd;
int
ftruncate (fd, length)
int fd;
@@
-12,14
+17,17
@@
ftruncate (fd, length)
{
return fcntl (fd, F_CHSIZE, length);
}
{
return fcntl (fd, F_CHSIZE, length);
}
-#else
+
+#else /* not F_CHSIZE */
#ifdef F_FREESP
#ifdef F_FREESP
-/* The following function was written by
-
kucharsk@Solbourne.com (William Kucharski)
*/
+
+
/* By William Kucharski <kucharsk@netcom.com>.
*/
#include <sys/stat.h>
#include <errno.h>
#include <sys/stat.h>
#include <errno.h>
+#ifdef HAVE_UNISTD_H
#include <unistd.h>
#include <unistd.h>
+#endif
int
ftruncate (fd, length)
int
ftruncate (fd, length)
@@
-44,23
+52,28
@@
ftruncate (fd, length)
}
else
{
}
else
{
+
/* Truncate length. */
/* Truncate length. */
+
fl.l_whence = 0;
fl.l_len = 0;
fl.l_start = length;
fl.l_whence = 0;
fl.l_len = 0;
fl.l_start = length;
- fl.l_type = F_WRLCK; /* Write lock on file space. */
+ fl.l_type = F_WRLCK; /* write lock on file space */
+
+ /* This relies on the *undocumented* F_FREESP argument to fcntl,
+ which truncates the file so that it ends at the position
+ indicated by fl.l_start. Will minor miracles never cease? */
- /* This relies on the UNDOCUMENTED F_FREESP argument to
- fcntl, which truncates the file so that it ends at the
- position indicated by fl.l_start.
- Will minor miracles never cease? */
if (fcntl (fd, F_FREESP, &fl) < 0)
return -1;
}
return 0;
}
if (fcntl (fd, F_FREESP, &fl) < 0)
return -1;
}
return 0;
}
-#else
+
+#else /* not F_CHSIZE nor F_FREESP */
+#ifdef HAVE_CHSIZE
+
int
ftruncate (fd, length)
int fd;
int
ftruncate (fd, length)
int fd;
@@
-68,5
+81,23
@@
ftruncate (fd, length)
{
return chsize (fd, length);
}
{
return chsize (fd, length);
}
+
+#else /* not F_CHSIZE nor F_FREESP nor HAVE_CHSIZE */
+
+#include <errno.h>
+#ifndef errno
+extern int errno;
#endif
#endif
-#endif
+
+int
+ftruncate (fd, length)
+ int fd;
+ off_t length;
+{
+ errno = EIO;
+ return -1;
+}
+
+#endif /* not HAVE_CHSIZE */
+#endif /* not F_FREESP */
+#endif /* not F_CHSIZE */