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https://www.gnu.org/licenses/gpl-howto.html recommends that the 'If not, see <url>.' phrase be a separate sentence. * tests/securityselinuxhelper.c: Remove doubled line. * tests/securityselinuxtest.c: Likewise. * globally: s/; If/. If/
112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/*
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* virfile.h: safer file handling
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*
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* Copyright (C) 2010-2011 Red Hat, Inc.
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* Copyright (C) 2010 IBM Corporation
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* Copyright (C) 2010 Stefan Berger
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* Copyright (C) 2010 Eric Blake
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef __VIR_FILES_H_
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# define __VIR_FILES_H_
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# include <stdio.h>
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# include "internal.h"
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typedef enum virFileCloseFlags {
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VIR_FILE_CLOSE_PRESERVE_ERRNO = 1 << 0,
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VIR_FILE_CLOSE_IGNORE_EBADF = 1 << 1,
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VIR_FILE_CLOSE_DONT_LOG = 1 << 2,
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} virFileCloseFlags;
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/* Don't call these directly - use the macros below */
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int virFileClose(int *fdptr, virFileCloseFlags flags)
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ATTRIBUTE_RETURN_CHECK;
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int virFileFclose(FILE **file, bool preserve_errno) ATTRIBUTE_RETURN_CHECK;
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FILE *virFileFdopen(int *fdptr, const char *mode) ATTRIBUTE_RETURN_CHECK;
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/* For use on normal paths; caller must check return value,
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and failure sets errno per close. */
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# define VIR_CLOSE(FD) virFileClose(&(FD), 0)
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# define VIR_FCLOSE(FILE) virFileFclose(&(FILE), false)
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/* Wrapper around fdopen that consumes fd on success. */
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# define VIR_FDOPEN(FD, MODE) virFileFdopen(&(FD), MODE)
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/* For use on cleanup paths; errno is unaffected by close,
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and no return value to worry about. */
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# define VIR_FORCE_CLOSE(FD) \
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ignore_value(virFileClose(&(FD), VIR_FILE_CLOSE_PRESERVE_ERRNO))
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# define VIR_FORCE_FCLOSE(FILE) ignore_value(virFileFclose(&(FILE), true))
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/* Similar VIR_FORCE_CLOSE() but ignores EBADF errors since they are expected
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* during mass close after fork(). */
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# define VIR_MASS_CLOSE(FD) \
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ignore_value(virFileClose(&(FD), \
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VIR_FILE_CLOSE_PRESERVE_ERRNO | \
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VIR_FILE_CLOSE_IGNORE_EBADF))
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# define VIR_LOG_CLOSE(FD) \
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ignore_value(virFileClose(&(FD), \
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VIR_FILE_CLOSE_PRESERVE_ERRNO | \
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VIR_FILE_CLOSE_DONT_LOG))
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/* Opaque type for managing a wrapper around a fd. */
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struct _virFileWrapperFd;
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typedef struct _virFileWrapperFd virFileWrapperFd;
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typedef virFileWrapperFd *virFileWrapperFdPtr;
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int virFileDirectFdFlag(void);
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enum virFileWrapperFdFlags {
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VIR_FILE_WRAPPER_BYPASS_CACHE = (1 << 0),
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VIR_FILE_WRAPPER_NON_BLOCKING = (1 << 1),
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};
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virFileWrapperFdPtr virFileWrapperFdNew(int *fd,
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const char *name,
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unsigned int flags)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
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int virFileWrapperFdClose(virFileWrapperFdPtr dfd);
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void virFileWrapperFdFree(virFileWrapperFdPtr dfd);
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int virFileLock(int fd, bool shared, off_t start, off_t len);
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int virFileUnlock(int fd, off_t start, off_t len);
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typedef int (*virFileRewriteFunc)(int fd, void *opaque);
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int virFileRewrite(const char *path,
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mode_t mode,
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virFileRewriteFunc rewrite,
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void *opaque);
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int virFileTouch(const char *path, mode_t mode);
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int virFileUpdatePerm(const char *path,
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mode_t mode_remove,
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mode_t mode_add);
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int virFileLoopDeviceAssociate(const char *file,
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char **dev);
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#endif /* __VIR_FILES_H */
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