mirror of
https://github.com/MidnightCommander/mc
synced 2024-12-23 12:56:51 +03:00
130 lines
4.1 KiB
C
130 lines
4.1 KiB
C
#ifndef MC_VFS_VFS_H
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#define MC_VFS_VFS_H
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#ifdef HAVE_MMAP
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#include <sys/mman.h>
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#endif
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void vfs_init (void);
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void vfs_shut (void);
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char *vfs_strip_suffix_from_filename (const char *filename);
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char *vfs_canon (const char *path);
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char *mc_get_current_wd (char *buffer, int bufsize);
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char *vfs_get_current_dir (void);
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int vfs_current_is_local (void);
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int vfs_file_is_local (const char *filename);
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/* Only the routines outside of the VFS module need the emulation macros */
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int mc_open (const char *filename, int flags, ...);
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int mc_close (int handle);
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int mc_read (int handle, void *buffer, int count);
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int mc_write (int handle, const void *buffer, int count);
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off_t mc_lseek (int fd, off_t offset, int whence);
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int mc_chdir (const char *path);
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DIR *mc_opendir (const char *dirname);
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struct dirent *mc_readdir (DIR * dirp);
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int mc_closedir (DIR * dir);
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int mc_stat (const char *path, struct stat *buf);
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int mc_lstat (const char *path, struct stat *buf);
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int mc_fstat (int fd, struct stat *buf);
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int mc_chmod (const char *path, mode_t mode);
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int mc_chown (const char *path, uid_t owner, gid_t group);
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int mc_utime (const char *path, struct utimbuf *times);
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int mc_readlink (const char *path, char *buf, int bufsiz);
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int mc_unlink (const char *path);
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int mc_symlink (const char *name1, const char *name2);
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int mc_link (const char *name1, const char *name2);
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int mc_mknod (const char *, mode_t, dev_t);
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int mc_rename (const char *original, const char *target);
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int mc_rmdir (const char *path);
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int mc_mkdir (const char *path, mode_t mode);
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char *mc_getlocalcopy (const char *pathname);
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int mc_ungetlocalcopy (const char *pathname, const char *local, int has_changed);
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int mc_ctl (int fd, int ctlop, void *arg);
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int mc_setctl (const char *path, int ctlop, void *arg);
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#ifdef HAVE_MMAP
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caddr_t mc_mmap (caddr_t, size_t, int, int, int, off_t);
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int mc_munmap (caddr_t addr, size_t len);
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#endif /* HAVE_MMAP */
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/* Operations for mc_ctl - on open file */
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enum {
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VFS_CTL_IS_NOTREADY
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};
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/* Operations for mc_setctl - on path */
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enum {
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VFS_SETCTL_FORGET,
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VFS_SETCTL_RUN,
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VFS_SETCTL_LOGFILE,
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VFS_SETCTL_FLUSH, /* invalidate directory cache */
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/* Setting this makes vfs layer give out potentially incorrect data,
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but it also makes some operations much faster. Use with caution. */
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VFS_SETCTL_STALE_DATA
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};
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#define O_ALL (O_CREAT | O_EXCL | O_NOCTTY | O_NDELAY | O_SYNC | O_WRONLY | O_RDWR | O_RDONLY)
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/* Midnight commander code should _not_ use other flags than those
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listed above and O_APPEND */
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#if (O_ALL & O_APPEND)
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#warning "Unexpected problem with flags, O_LINEAR disabled, contact pavel@ucw.cz"
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#define O_LINEAR 0
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#define IS_LINEAR(a) 0
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#define NO_LINEAR(a) a
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#else
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#define O_LINEAR O_APPEND
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#define IS_LINEAR(a) ((a) == (O_RDONLY | O_LINEAR)) /* Return only 0 and 1 ! */
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#define NO_LINEAR(a) (((a) == (O_RDONLY | O_LINEAR)) ? O_RDONLY : (a))
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#endif
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/* O_LINEAR is strange beast, be careful. If you open file asserting
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* O_RDONLY | O_LINEAR, you promise:
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*
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* a) to read file linearly from beginning to the end
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* b) not to open another file before you close this one
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* (this will likely go away in future)
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* as a special gift, you may
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* c) lseek() immediately after open(), giving ftpfs chance to
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* reget. Be warned that this lseek() can fail, and you _have_
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* to handle that gratefully.
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*
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* O_LINEAR allows filesystems not to create temporary file in some
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* cases (ftp transfer). -- pavel@ucw.cz
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*/
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/* And now some defines for our errors. */
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#ifdef ENOSYS
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#define E_NOTSUPP ENOSYS /* for use in vfs when module does not provide function */
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#else
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#define E_NOTSUPP EFAULT /* Does this happen? */
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#endif
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#ifdef ENOMSG
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#define E_UNKNOWN ENOMSG /* if we do not know what error happened */
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#else
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#define E_UNKNOWN EIO /* if we do not know what error happened */
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#endif
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#ifdef EREMOTEIO
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#define E_REMOTE EREMOTEIO /* if other side of ftp/fish reports error */
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#else
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#define E_REMOTE ENETUNREACH /* :-( there's no EREMOTEIO on some systems */
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#endif
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#ifdef EPROTO
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#define E_PROTO EPROTO /* if other side fails to follow protocol */
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#else
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#define E_PROTO EIO
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#endif
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#endif
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