libpq-fs.h
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上传日期:2007-01-07
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文件大小:3k
- /*-------------------------------------------------------------------------
- *
- * libpq-fs.h
- * definitions for using Inversion file system routines
- *
- *
- * Copyright (c) 1994, Regents of the University of California
- *
- * $Id: libpq-fs.h,v 1.8 1999/02/13 23:21:35 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
- #ifndef LIBPQ_FS_H
- #define LIBPQ_FS_H
- /* UNIX compatibility junk. This should be in all systems' include files,
- but this is not always the case. */
- #ifndef MAXNAMLEN
- #define MAXNAMLEN 255
- #endif /* MAXNAMLEN */
- struct pgdirent
- {
- unsigned long d_ino;
- unsigned short d_namlen;
- char d_name[MAXNAMLEN + 1];
- };
- /*
- * SysV struct dirent doesn't have d_namlen.
- * This counts on d_name being last, which is moderately safe (ha) since
- * it's the variable-length part of the structure.
- */
- #ifdef SYSV_DIRENT
- #define D_NAMLEN(dp)
- ((dp)->d_reclen - offsetof(struct dirent, d_name[0]))
- #else /* SYSV_DIRENT */
- #define D_NAMLEN(dp)
- ((dp)->d_namlen)
- #endif /* SYSV_DIRENT */
- /* for stat(2) */
- #ifndef S_IRUSR
- /* file modes */
- #define S_IRWXU 00700 /* read, write, execute: owner */
- #define S_IRUSR 00400 /* read permission: owner */
- #define S_IWUSR 00200 /* write permission: owner */
- #define S_IXUSR 00100 /* execute permission: owner */
- #define S_IRWXG 00070 /* read, write, execute: group */
- #define S_IRGRP 00040 /* read permission: group */
- #define S_IWGRP 00020 /* write permission: group */
- #define S_IXGRP 00010 /* execute permission: group */
- #define S_IRWXO 00007 /* read, write, execute: other */
- #define S_IROTH 00004 /* read permission: other */
- #define S_IWOTH 00002 /* write permission: other */
- #define S_IXOTH 00001 /* execute permission: other */
- #define _S_IFMT 0170000 /* type of file; sync with S_IFMT */
- #define _S_IFBLK 0060000 /* block special; sync with S_IFBLK */
- #define _S_IFCHR 0020000 /* character special sync with S_IFCHR */
- #define _S_IFDIR 0040000 /* directory; sync with S_IFDIR */
- #define _S_IFIFO 0010000 /* FIFO - named pipe; sync with S_IFIFO */
- #define _S_IFREG 0100000 /* regular; sync with S_IFREG */
- #define S_IFDIR _S_IFDIR
- #define S_IFREG _S_IFREG
- #define S_ISDIR( mode ) (((mode) & _S_IFMT) == _S_IFDIR)
- #endif /* S_IRUSR */
- /*
- * Inversion doesn't have links.
- */
- #ifndef S_ISLNK
- #define S_ISLNK(x) 0
- #endif
- /*
- * Flags for inversion file system large objects. Normally, creat()
- * takes mode arguments, but we don't use them in inversion, since
- * you get postgres protections. Instead, we use the low sixteen bits
- * of the integer mode argument to store the number of the storage
- * manager to be used, and the high sixteen bits for flags.
- */
- #define INV_WRITE 0x00020000
- #define INV_READ 0x00040000
- /* Error values for p_errno */
- #define PEPERM 1 /* Not owner */
- #define PENOENT 2 /* No such file or directory */
- #define PEACCES 13 /* Permission denied */
- #define PEEXIST 17 /* File exists */
- #define PENOTDIR 20 /* Not a directory */
- #define PEISDIR 21 /* Is a directory */
- #define PEINVAL 22 /* Invalid argument */
- #define PENAMETOOLONG 63 /* File name too long */
- #define PENOTEMPTY 66 /* Directory not empty */
- #define PEPGIO 99 /* postgres backend had problems */
- #endif /* LIBPQ_FS_H */