*
* You should have received a copy of the GNU Lesser General Public
* License along with GLib; see the file COPYING.LIB. If not,
- * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
+#include "glibconfig.h"
#define G_STDIO_NO_WRAP_ON_UNIX
-#include "glib.h"
-
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
-#ifdef HAVE_UNISTD_H
+#ifdef G_OS_UNIX
#include <unistd.h>
#endif
#include <direct.h>
#include <io.h>
#include <sys/utime.h>
+#else
+#include <utime.h>
+#include <errno.h>
#endif
#include "gstdio.h"
-#include "galias.h"
-#if !defined (G_OS_UNIX) && !defined (G_OS_WIN32) && !defined (G_OS_BEOS)
+#if !defined (G_OS_UNIX) && !defined (G_OS_WIN32)
#error Please port this to your operating system
#endif
+#if defined (_MSC_VER) && !defined(_WIN64)
+#undef _wstat
+#define _wstat _wstat32
+#endif
/**
* g_access:
*
* A wrapper for the POSIX access() function. This function is used to
* test a pathname for one or several of read, write or execute
- * permissions, or just existence. On Windows, the underlying access()
- * function in the C library only checks the READONLY attribute, and
- * does not look at the ACL at all. Software that needs to handle file
- * permissions on Windows more exactly should use the Win32 API.
+ * permissions, or just existence.
+ *
+ * On Windows, the file protection mechanism is not at all POSIX-like,
+ * and the underlying function in the C library only checks the
+ * FAT-style READONLY attribute, and does not look at the ACL of a
+ * file at all. This function is this in practise almost useless on
+ * Windows. Software that needs to handle file permissions on Windows
+ * more exactly should use the Win32 API.
*
- * See the C library manual for more details about access().
+ * See your C library manual for more details about access().
*
* Returns: zero if the pathname refers to an existing file system
- * object that has all the tested permissions, or -1 otherwise or on
- * error.
+ * object that has all the tested permissions, or -1 otherwise
+ * or on error.
*
* Since: 2.8
*/
return -1;
}
- retval = _waccess (wfilename, mode);
+#ifndef X_OK
+#define X_OK 1
+#endif
+
+ retval = _waccess (wfilename, mode & ~X_OK);
save_errno = errno;
g_free (wfilename);
* @mode: as in chmod()
*
* A wrapper for the POSIX chmod() function. The chmod() function is
- * used to set the permissions of a file system object. Note that on
- * Windows the file protection mechanism is not at all POSIX-like, and
- * the underlying chmod() function in the C library just sets or
- * clears the READONLY attribute. It does not touch any ACL. Software
- * that needs to manage file permissions on Windows exactly should
- * use the Win32 API.
+ * used to set the permissions of a file system object.
+ *
+ * On Windows the file protection mechanism is not at all POSIX-like,
+ * and the underlying chmod() function in the C library just sets or
+ * clears the FAT-style READONLY attribute. It does not touch any
+ * ACL. Software that needs to manage file permissions on Windows
+ * exactly should use the Win32 API.
*
- * See the C library manual for more details about chmod().
+ * See your C library manual for more details about chmod().
*
- * Returns: zero if the operation succeeded, -1 on error.
+ * Returns: 0 if the operation succeeded, -1 on error
*
* Since: 2.8
*/
return chmod (filename, mode);
#endif
}
-
/**
* g_open:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
* @mode: as in open()
*
* A wrapper for the POSIX open() function. The open() function is
- * used to convert a pathname into a file descriptor. Note that on
- * POSIX systems file descriptors are implemented by the operating
- * system. On Windows, it's the C library that implements open() and
- * file descriptors. The actual Windows API for opening files is
- * something different.
- *
- * See the C library manual for more details about open().
+ * used to convert a pathname into a file descriptor.
*
- * Returns: a new file descriptor, or -1 if an error occurred. The
- * return value can be used exactly like the return value from open().
+ * On POSIX systems file descriptors are implemented by the operating
+ * system. On Windows, it's the C library that implements open() and
+ * file descriptors. The actual Win32 API for opening files is quite
+ * different, see MSDN documentation for CreateFile(). The Win32 API
+ * uses file handles, which are more randomish integers, not small
+ * integers like file descriptors.
+ *
+ * Because file descriptors are specific to the C library on Windows,
+ * the file descriptor returned by this function makes sense only to
+ * functions in the same C library. Thus if the GLib-using code uses a
+ * different C library than GLib does, the file descriptor returned by
+ * this function cannot be passed to C library functions like write()
+ * or read().
+ *
+ * See your C library manual for more details about open().
+ *
+ * Returns: a new file descriptor, or -1 if an error occurred.
+ * The return value can be used exactly like the return value
+ * from open().
*
* Since: 2.6
*/
errno = save_errno;
return retval;
#else
- return open (filename, flags, mode);
+ int fd;
+ do
+ fd = open (filename, flags, mode);
+ while (G_UNLIKELY (fd == -1 && errno == EINTR));
+ return fd;
#endif
}
*
* A wrapper for the POSIX creat() function. The creat() function is
* used to convert a pathname into a file descriptor, creating a file
- * if necessary. Note that on POSIX systems file descriptors are
- * implemented by the operating system. On Windows, it's the C library
- * that implements creat() and file descriptors. The actual Windows
- * API for opening files is something different.
- *
- * See the C library manual for more details about creat().
- *
- * Returns: a new file descriptor, or -1 if an error occurred. The
- * return value can be used exactly like the return value from creat().
+ * if necessary.
+
+ * On POSIX systems file descriptors are implemented by the operating
+ * system. On Windows, it's the C library that implements creat() and
+ * file descriptors. The actual Windows API for opening files is
+ * different, see MSDN documentation for CreateFile(). The Win32 API
+ * uses file handles, which are more randomish integers, not small
+ * integers like file descriptors.
+ *
+ * Because file descriptors are specific to the C library on Windows,
+ * the file descriptor returned by this function makes sense only to
+ * functions in the same C library. Thus if the GLib-using code uses a
+ * different C library than GLib does, the file descriptor returned by
+ * this function cannot be passed to C library functions like write()
+ * or read().
+ *
+ * See your C library manual for more details about creat().
+ *
+ * Returns: a new file descriptor, or -1 if an error occurred.
+ * The return value can be used exactly like the return value
+ * from creat().
*
* Since: 2.8
*/
* renames a file, moving it between directories if required.
*
* See your C library manual for more details about how rename() works
- * on your system. Note in particular that on Win9x it is not possible
- * to rename a file if a file with the new name already exists. Also
- * it is not possible in general on Windows to rename an open file.
+ * on your system. It is not possible in general on Windows to rename
+ * a file that is open to some process.
*
* Returns: 0 if the renaming succeeded, -1 if an error occurred
*
* attempts to create a directory with the given name and permissions.
* The mode argument is ignored on Windows.
*
- * See the C library manual for more details about mkdir().
+ * See your C library manual for more details about mkdir().
*
* Returns: 0 if the directory was successfully created, -1 if an error
* occurred
}
/**
+ * GStatBuf:
+ *
+ * A type corresponding to the appropriate struct type for the stat()
+ * system call, depending on the platform and/or compiler being used.
+ *
+ * See g_stat() for more information.
+ */
+/**
* g_stat:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
- * @buf: a pointer to a <structname>stat</structname> struct, which
- * will be filled with the file information
+ * @buf: a pointer to a stat struct, which will be filled with the file
+ * information
*
* A wrapper for the POSIX stat() function. The stat() function
* returns information about a file. On Windows the stat() function in
- * the C library checks only the READONLY attribute and does not look
- * at the ACL at all. Thus the protection bits in the st_mode field
- * are a fabrication of little use.
+ * the C library checks only the FAT-style READONLY attribute and does
+ * not look at the ACL at all. Thus on Windows the protection bits in
+ * the @st_mode field are a fabrication of little use.
*
- * See the C library manual for more details about stat().
- *
- * Returns: 0 if the information was successfully retrieved, -1 if an error
- * occurred
+ * On Windows the Microsoft C libraries have several variants of the
+ * stat struct and stat() function with names like _stat(), _stat32(),
+ * _stat32i64() and _stat64i32(). The one used here is for 32-bit code
+ * the one with 32-bit size and time fields, specifically called _stat32().
+ *
+ * In Microsoft's compiler, by default struct stat means one with
+ * 64-bit time fields while in MinGW struct stat is the legacy one
+ * with 32-bit fields. To hopefully clear up this messs, the gstdio.h
+ * header defines a type #GStatBuf which is the appropriate struct type
+ * depending on the platform and/or compiler being used. On POSIX it
+ * is just struct stat, but note that even on POSIX platforms, stat()
+ * might be a macro.
+ *
+ * See your C library manual for more details about stat().
+ *
+ * Returns: 0 if the information was successfully retrieved,
+ * -1 if an error occurred
*
* Since: 2.6
*/
int
g_stat (const gchar *filename,
- struct stat *buf)
+ GStatBuf *buf)
{
#ifdef G_OS_WIN32
wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
(!g_path_is_absolute (filename) || len > g_path_skip_root (filename) - filename))
wfilename[len] = '\0';
- retval = _wstat (wfilename, (struct _stat *) buf);
+ retval = _wstat (wfilename, buf);
save_errno = errno;
g_free (wfilename);
/**
* g_lstat:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
- * @buf: a pointer to a <structname>stat</structname> struct, which
- * will be filled with the file information
+ * @buf: a pointer to a stat struct, which will be filled with the file
+ * information
*
* A wrapper for the POSIX lstat() function. The lstat() function is
* like stat() except that in the case of symbolic links, it returns
* refers to. If the system does not support symbolic links g_lstat()
* is identical to g_stat().
*
- * See the C library manual for more details about lstat().
+ * See your C library manual for more details about lstat().
*
- * Returns: 0 if the information was successfully retrieved, -1 if an error
- * occurred
+ * Returns: 0 if the information was successfully retrieved,
+ * -1 if an error occurred
*
* Since: 2.6
*/
int
g_lstat (const gchar *filename,
- struct stat *buf)
+ GStatBuf *buf)
{
#ifdef HAVE_LSTAT
/* This can't be Win32, so don't do the widechar dance. */
/**
* g_fopen:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
- * @mode: a string describing the mode in which the file should be
- * opened
+ * @mode: a string describing the mode in which the file should be opened
*
- * A wrapper for the POSIX fopen() function. The fopen() function opens
- * a file and associates a new stream with it.
+ * A wrapper for the stdio fopen() function. The fopen() function
+ * opens a file and associates a new stream with it.
*
- * See the C library manual for more details about fopen().
+ * Because file descriptors are specific to the C library on Windows,
+ * and a file descriptor is part of the FILE struct, the FILE* returned
+ * by this function makes sense only to functions in the same C library.
+ * Thus if the GLib-using code uses a different C library than GLib does,
+ * the FILE* returned by this function cannot be passed to C library
+ * functions like fprintf() or fread().
+ *
+ * See your C library manual for more details about fopen().
*
- * Returns: A <type>FILE</type> pointer if the file was successfully
- * opened, or %NULL if an error occurred
+ * Returns: A FILE* if the file was successfully opened, or %NULL if
+ * an error occurred
*
* Since: 2.6
*/
/**
* g_freopen:
* @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
- * @mode: a string describing the mode in which the file should be
- * opened
- * @stream: an existing stream which will be reused, or %NULL
+ * @mode: a string describing the mode in which the file should be opened
+ * @stream: (allow-none): an existing stream which will be reused, or %NULL
*
* A wrapper for the POSIX freopen() function. The freopen() function
* opens a file and associates it with an existing stream.
*
- * See the C library manual for more details about freopen().
+ * See your C library manual for more details about freopen().
*
- * Returns: A <type>FILE</type> pointer if the file was successfully
- * opened, or %NULL if an error occurred.
+ * Returns: A FILE* if the file was successfully opened, or %NULL if
+ * an error occurred.
*
* Since: 2.6
*/
* See your C library manual for more details about how utime() works
* on your system.
*
- * Returns: 0 if the operation was successful, -1 if an error
- * occurred
+ * Returns: 0 if the operation was successful, -1 if an error occurred
*
* Since: 2.18
*/
#endif
}
-#define __G_STDIO_C__
-#include "galiasdef.c"
+/**
+ * g_close:
+ * @fd: A file descriptor
+ * @error: a #GError
+ *
+ * This wraps the close() call; in case of error, %errno will be
+ * preserved, but the error will also be stored as a #GError in @error.
+ *
+ * Besides using #GError, there is another major reason to prefer this
+ * function over the call provided by the system; on Unix, it will
+ * attempt to correctly handle %EINTR, which has platform-specific
+ * semantics.
+ *
+ * Since: 2.36
+ */
+gboolean
+g_close (gint fd,
+ GError **error)
+{
+ int res;
+ res = close (fd);
+ /* Just ignore EINTR for now; a retry loop is the wrong thing to do
+ * on Linux at least. Anyone who wants to add a conditional check
+ * for e.g. HP-UX is welcome to do so later...
+ *
+ * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html
+ * https://bugzilla.gnome.org/show_bug.cgi?id=682819
+ * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR
+ * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain
+ */
+ if (G_UNLIKELY (res == -1 && errno == EINTR))
+ return TRUE;
+ else if (res == -1)
+ {
+ int errsv = errno;
+ g_set_error_literal (error, G_FILE_ERROR,
+ g_file_error_from_errno (errsv),
+ g_strerror (errsv));
+ errno = errsv;
+ return FALSE;
+ }
+ return TRUE;
+}
+
projects / platform / upstream / glib.git / blobdiff