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openat: correct new comment
[gnulib.git]
/
lib
/
ftruncate.c
diff --git
a/lib/ftruncate.c
b/lib/ftruncate.c
index
d4c129a
..
33b69d8
100644
(file)
--- a/
lib/ftruncate.c
+++ b/
lib/ftruncate.c
@@
-1,9
+1,10
@@
/* ftruncate emulations that work on some System V's.
This file is in the public domain. */
/* ftruncate emulations that work on some System V's.
This file is in the public domain. */
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
+
+/* Specification. */
+#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/types.h>
#include <fcntl.h>
@@
-11,9
+12,7
@@
#ifdef F_CHSIZE
int
#ifdef F_CHSIZE
int
-ftruncate (fd, length)
- int fd;
- off_t length;
+ftruncate (int fd, off_t length)
{
return fcntl (fd, F_CHSIZE, length);
}
{
return fcntl (fd, F_CHSIZE, length);
}
@@
-25,14
+24,9
@@
ftruncate (fd, length)
# include <sys/stat.h>
# include <errno.h>
# include <sys/stat.h>
# include <errno.h>
-# if HAVE_UNISTD_H
-# include <unistd.h>
-# endif
int
int
-ftruncate (fd, length)
- int fd;
- off_t length;
+ftruncate (int fd, off_t length)
{
struct flock fl;
struct stat filebuf;
{
struct flock fl;
struct stat filebuf;
@@
-44,11
+38,11
@@
ftruncate (fd, length)
{
/* Extend file length. */
if (lseek (fd, (length - 1), SEEK_SET) < 0)
{
/* Extend file length. */
if (lseek (fd, (length - 1), SEEK_SET) < 0)
- return -1;
+
return -1;
/* Write a "0" byte. */
if (write (fd, "", 1) != 1)
/* Write a "0" byte. */
if (write (fd, "", 1) != 1)
- return -1;
+
return -1;
}
else
{
}
else
{
@@
-58,26
+52,24
@@
ftruncate (fd, 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,
/* 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? */
+
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)
if (fcntl (fd, F_FREESP, &fl) < 0)
- return -1;
+
return -1;
}
return 0;
}
# else /* not F_CHSIZE nor F_FREESP */
}
return 0;
}
# else /* not F_CHSIZE nor F_FREESP */
-# if HAVE_CHSIZE
+# if HAVE_CHSIZE
/* native Windows, e.g. mingw */
int
int
-ftruncate (fd, length)
- int fd;
- off_t length;
+ftruncate (int fd, off_t length)
{
return chsize (fd, length);
}
{
return chsize (fd, length);
}
@@
-85,14
+77,9
@@
ftruncate (fd, length)
# else /* not F_CHSIZE nor F_FREESP nor HAVE_CHSIZE */
# include <errno.h>
# else /* not F_CHSIZE nor F_FREESP nor HAVE_CHSIZE */
# include <errno.h>
-# ifndef errno
-extern int errno;
-# endif
int
int
-ftruncate (fd, length)
- int fd;
- off_t length;
+ftruncate (int fd, off_t length)
{
errno = EIO;
return -1;
{
errno = EIO;
return -1;